Requirements For Measuring Systems For Liquids Other Than Water Ident. Eec

Original Language Title: požadavky na měřicí systémy pro kapaliny jiné než voda označ. EHS

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Read the untranslated law here: https://portal.gov.cz/app/zakony/download?idBiblio=50569&nr=22~2F2001~20Sb.&ft=txt

22/2001 Coll.
DECREE


Ministry of Industry and Trade

Dated 13 December 2000

Laying down requirements for measuring systems for liquids other than water-marking

EEC
Ministry of Industry and Trade, pursuant to § 27 of Law no. 505/1990
Coll., On metrology, as amended by Act no. 119/2000 Coll., (Hereinafter the "Act") to implement §
6 paragraph. 2 and § 9 par. 1 of the Act:

§ 1

This decree sets out the requirements for measuring systems for liquids other than water
incorporating volumetric meters in which the liquid causes the movement
mobile walls of measuring chambers. A measuring system for liquids includes
meter itself, ancillary equipment which may be subject connected,
all the devices necessary for ensuring correct measurement and any
equipment that has been added in particular in order to facilitate traffic.

§ 2

Measuring systems for liquids other than water can be used instead of the official
marks as prescribed in special legislation 1)
bear the EEC approval and EEC initial verification, the graphic appearance
by special legislation, ^ 2) only if they meet the requirements
set out in the Annex to this Directive and the requirements laid down by special legislation
. ^ 2)

§ 3

This Decree shall take effect on the date of entry into force of the treaty
Czech Republic's accession to the European Union.
Minister
:

Doc. Ing. Grégr vr

Arrival.

Requirements for measuring systems for liquids other than water

First

GENERAL REQUIREMENTS FOR MEASURING SYSTEMS
1.1 Definitions


Measuring System 1.1.1

Measuring system for liquids other than water comprises, in addition itself
gauge the appropriate special legal regulation 3) and auxiliary equipment
appropriate special legal regulation 3) that this
may be associated with, all the equipment
to ensure correct measuring or intended to facilitate the operation and all other
devices that could in any way affect the measurement.
If several meters intended for separate measuring operations operate in conjunction
with common components, each meter
common parts must be regarded as a measuring system.
If several meters are intended for a single measuring operation, the measuring
devices are considered a single measuring system.

1.1.2 Minimum measured quantity and the minimum reception

The minimum delivery of a measuring system is determined by the specific requirements
legislation3), taking into account the provisions of this Decree.
In measuring systems intended to measure liquid
smallest volume of liquid for which measurement shall be authorized is called minimum.
Preceding requirement relating to minimum delivery applies, by
analogy, to minimum reception.

1.1.3 gas separator

Gas separator is an apparatus for continuously separating and removing
air or gases contained in the liquid. The gas evacuation device
works automatically. This requirement may be waived, however, if the available
mechanism which automatically stops the flow of liquid when
risk of air or gas into the meter. In this case it will be restored
measurement only when the air or gas has been removed, and
either automatically or manually.
1.1.4 Breather


Extractor is an apparatus designed to extract air or gases
are slightly mixed with the liquid accumulated in the pipeline before
meter, in the form of pockets. The above requirements concerning the equipment
gas removal at the gas separator shall also apply to the extractor.
Special gas extractor 1.1.5


Special gas extractor is an apparatus which, like the gas separator
but under less stringent operating conditions, continuously separates
air or gases contained in the liquid, and automatically stops the flow of liquid
at risk of intrusion accumulated air or gases which are only
slightly mixed with the liquid in the form of pockets into the meter.
1.1.6 Capacitor


Capacitor is a closed tank, measuring systems for pressurized liquefied gases
serves to collect the gases contained in
liquid to be measured and to condense them before measuring.

Gas indicator 1.1.7


Gas indicator is a device allowing easy detection of any air or
gas bubbles which may be present in the liquid flow.
1.1.8 Sight


Sight is a device for checking the degree of filling of the liquid.
1.2 Application requirements


For certain types of measuring systems are specified in Section 2
have special requirements.

1.3 Meters, flowrate limits

Meters incorporated in a measuring system, including any ancillary equipment, must
EEC pattern approved for measuring the liquid
under normal operating conditions. These meters shall be subject
separate EEC type approval or approval included in the EEC
approval of the measuring system of which they are part.
Flowrate limits (maximum and minimum flow) in the measuring system may differ from those of
flow meter which is connected to it. In these cases you need
checked that the maximum and minimum flowrates of the measuring system
are compatible with those of the meter. Although
meter has been approved as a component incorporated in a measuring system, it must in any case
meet the requirements of special legal regulations.3) If one
measuring system connected in parallel several meters must be at || | determining limit the flow of the entire system to take into account the sum of the maximum and minimum flow gauges
except in special cases which are
listed in this Annex. The maximum flowrate of the measuring system must be
least twice the total minimum flowrate of its meter or meters
.

1.4 point transfer

1.4.1 Measuring systems shall incorporate a point defining the quantity
liquid delivered or received and called the point of transfer.
Transfer point is located downstream of the meter in delivery systems, upstream of the meter at
sampling equipment.

1.4.2 Measuring systems may be of two types: 'empty-hose
a full-hose systems. The term "hose" includes rigid pipework.

1.4.2.1 Empty-hose systems are u
delivery equipment, measuring systems in which the point of transfer is situated upstream of a delivery hose.
Point of transfer takes the form of either a weir-type sight-glass or a closing device,
in both cases combined with a system that after each measurement
ensures the emptying of the delivery hose.

1.4.2.2 Full-hose are u
delivery equipment, measuring systems whose point of transfer consists of a dosing device
placed on the discharge line. Where the pipework has a free end
closing device shall be placed as close as possible to this end.

1.4.2.3 In the case of receiving equipment, the same requirements apply by analogy
on the supply pipe upstream of the meter.

1.5 Filters

Part of the measuring systems are easily accessible filters placed in front
meter, which is used to collect solid impurities from the liquids.

1.6 Elimination of air or gases
1.6.1 General requirements


Measuring systems are installed in such a way that, while maintaining normal operating conditions
prevent entry of air or release of gas into the liquid before
meter. Otherwise, it should be complemented by a measuring system devices
gas elimination permitting the removal of the air or suspended
gases present in the liquid before it passes through the meter.
Gas-eliminating equipment shall be suitable for the supply conditions and
must be done so that the additional error due to measurement results
air or gas shall not exceed:

- 0.5% of measured quantities of liquids other than potable liquids of
dynamic viscosity not exceeding 1 mPa.s

- 1% of the quantity measured for potable liquids and dynamic viscosity
exceeding 1 mPa.s.

But do not take into account errors of less than 1% of the minimum delivery.

1.6.2 Operation with pump

1.6.2.1 If the pressure at the pump intake may, even momentarily,
fall below atmospheric pressure or the saturated vapor pressure, it is necessary to ensure
gas separator according to paragraph 1.6.6.

1.6.2.1.1 A gas separator intended to operate at a maximum flowrate not exceeding 100 m3
-1 may be subject either to separate EEC
approval or approval included a procedure for type approval
the measuring system of which it is part, and where the

Annex provides for approval of such a system. If we are talking about
gas separators designed to operate at a maximum flowrate exceeding 100 m3
-1, approval may be granted by analogy with
approved pattern of the same design and smaller dimensions.
Gas separators which have received separate EEC pattern approval may be
used in measuring systems without gas indicators.

1.6.2.1.2 gas separator must be installed at the pump.
Always must be placed as close as possible to the meter so that the pressure drop due to the flow
liquid between the two components is negligible;
gas separator may be combined with the pump.

1.6.2.1.3 The operational limits of a gas separator shall be as follows:

A) the maximum flowrate or flowrates for one or more specified liquids,

B) the maximum and minimum pressure limits compatible with proper functioning
device for separating gases.

1.6.2.1.4 A gas separator intended to operate at a maximum flowrate not exceeding 100 m3
-1 and subject to separate EEC type approval
must ensure, within the error limits laid down in section 1.6.1,
elimination of air or gases mixed with the liquid to be measured under these test conditions
:

A) the measuring system shall operate at its maximum flowrate and the
minimum pressure laid down for the gas separator

B) is accessible to any ratio of volume of air or gas to liquid
if the gas separator is designed for a maximum flow equal
or less than 20 m3 -1. Must be limited to 30% if the gas separator
designed for a maximum flowrate higher than 20 m3 -1. (
Air or gases shall be measured at atmospheric pressure to determine their
share).

The automatic gas removal device must operate properly at
maximum pressure laid down for gas separators.

1.6.2.1.5 Where a gas separator is approved as a device that is part
approved measuring system can be applied to it
of 1.6.2.1.4. In this case, a gas indicator is not necessary.
If the measuring system incorporates a gas indicator, has a gas separator in
within the error limits laid down in section 1.6.1, ensure the elimination of air or gases
mixed with the fluid under the following conditions:

A) the measuring system shall operate at its maximum flowrate and minimum
pressure

B) the ratio of the volume of air or gases relative to the liquid shall not exceed:

- 20% for liquids other than potable liquids of a viscosity not exceeding 1 mPa.s
,

- 10% for potable liquids and for other liquids of a viscosity exceeding 1 mPa.s.


Requirement set out in points a) and b) is generally met if the effective volume
separator is at least 8% of deliveries per minute at maximum flow
indicated on the label of the measuring system. If the ratio
volume of air or gases relative to the liquid exceeds the above percentages and the gas separator
meet requirements relating to the maximum permissible
errors, then gas or air bubbles must be clearly visible in the gas indicator
.

1.6.2.2 When the pressure at the pump inlet is constantly greater than the atmospheric pressure
and saturated vapor pressure and is not available
dissociating gas is needed breather or special gas extractor in
case the probability of gaseous formations between the pump and
meter at a time when there is no flow or when the pipe gets into
air pockets (for example, when an empty supply tank
) and causes a specific error exceeding 1% the minimum delivery.

1.6.2.2.1 extractor or special gas extractor intended to operate at
flowrate not exceeding 100 m3-1 can be approved either
separate EEC type approval or within the EEC type approval
the measuring system of which it is part, if
Annex makes provision for approval of the system. But if the vent is designed to operate
at a maximum flow rate of more than 100 m3-1, approval may be granted
by applying the procedure contained in the approval
same design and smaller dimensions.
Gas extractors and special gas extractors which have been granted separate EEC pattern approval may be
used in measuring systems without gas indicators.


1.6.2.2.2 extractor or special gas extractor shall in principle be installed downstream of the pump
. However, it may be combined with the pump. In both cases
they must be installed at the highest point of the piping system before
meter and as close as possible to the gauge. When installed below the meter,
must include a check valve installed in case of need with a reducing
valve to prevent emptying pipes between the valve and
meter. If the piping system upstream of the meter incorporates several high points,
may be required several gas extractors.

1.6.2.2.3 For operating limits extractor or special gas extractor shall apply mutatis mutandis
point 1.6.2.1.3 including the minimum delivery for which they are designed
devices.

1.6.2.2.4 extractor or special gas extractor shall at maximum
flow measuring system, ensure the elimination of gas or air
measured at atmospheric pressure to a volume that is at least equal to the smallest
traverse without an additional error greater than 1% of the smallest
delivery. Additionally, a special gas extractor must be able to continuously
volume of gas or air equal to 5% of the volume of liquid
delivered at the maximum flowrate without the resulting additional error exceeding the limits fixed
section 1.6.1

1.6.2.3 Requirements 1.6.2.1 and 1.6.2.2nesmějí
prohibit the existence of manual or automatic extraction devices in fixed installations of large dimensions
.

1.6.2.4 If the fluid supply is arranged so that under no circumstances does not
gas or air and that no external gas or air
penetrated during measurement in the supply line upstream of the meter does not need equipment
gas elimination, under the assumption that the
gaseous formation during non-flow does not cause a specific error
greater than 1% of the minimum delivery.

1.6.3 Operation without pumps

1.6.3.1 In cases where the meter is supplied by gravity, without use
pump if the pressure of the fluid in all parts of the pipeline before
meter and the meter itself is greater than the saturated vapor pressure of the liquid and atmospheric
pressure gas separator is required.
However, after the measuring system into operation is necessary to ensure that the system
always correctly filled.

1.6.3.2 If the fluid pressure less than atmospheric pressure while remaining
greater than the saturated vapor pressure, it is necessary to prevent the penetration of air into
meter.

1.6.3.3 Where the meter is supplied under gas pressure must be avoided
penetration of gas into the meter.

1.6.3.4 The pressure of the liquid between the meter and the point of transfer shall be
higher than the saturated vapor pressure.
1.6.4 Exhaust gases


Pipes for exhaust gases from the gas separator shall contain
manually controlled valve if closure of this valve prevents the operation of the separator
gases. If such closing devices required for safety reasons
It is installed only with the seal allowing its collateral
open position.
1.6.5 Anti-swirl device


If it is assumed that the supply tank of a measuring system be completely emptied
, then you need to drain the tank opening
provide anti-swirl device, except in the case where the system includes a gas separator.
Viscous liquid 1.6.6


As the effectiveness of gas separators and gas extractors decreases with an increase
viscosity of the liquid, these devices need not be fitted with
liquids with a dynamic viscosity greater than 20 cP at 20 st. C.
pump must be organized so that the inlet pressure is always greater than the atmospheric pressure
. If this condition can not in all circumstances
fulfill device shall be provided, which automatically stops the flow
liquid when the inlet pressure falls below atmospheric pressure.
To monitor this pressure gauge must be used.
These conditions are not necessary if the measuring system incorporates devices ensuring that no air
through the joints in the sections of pipework subjected to reduced pressure.
When the measuring system is out of operation, the pipeline must be kept full of liquid up to the point of transfer
.

Gas indicator 1.7

1.7.1 Measuring systems may be fitted with a gas indicator.
These devices may be made mandatory in the cases mentioned in paragraph 2.

1.7.2 gas indicator shall be constructed
provide a satisfactory indication of the presence of gas or air in the liquid.


1.7.3 gas indicator shall be installed downstream.

1.7.4 In measuring systems empty-hose gas indicator may take the form
sight and can also be used as a point of transfer.

1.7.5 gas indicator may be provided with a bleed screw or
other blow-off device when it forms a high point in the pipe system.
Blow-off device must be connected to any pipeline. Part
gas indicator may be an indicator of the flow (e.g. a spiral), where
these devices do not prevent visibility gaseous formations which may be present in the liquid
.

1.8 Complete filling of the measuring system

1.8.1 The meter and the pipework from the meter to the point of transfer missions
be automatically kept full of liquid during measurement even when out of service.
If this condition is not fulfilled, particularly in the case of a fixed installation
must be complete filling of the measuring system up to the point of transfer to
manually and monitored during measurement, and when out of service.
To ensure complete elimination of air and gas from the measuring system must be at appropriate locations
blow-off devices, if possible with small windows
.

1.8.2 pipework between the meter and the point of transfer shall not, in general, by variations in temperature
cause additional errors, which would be greater than 1%
minimum delivery. In paragraph 2 shall specify the technical conditions that
must be designated special cases fulfilled in order to comply with this requirement
.

1.8.3 If necessary, the meter installed for maintaining device
pressure to ensure that the pressure in the gas separator and the meter is always
greater than the atmospheric pressure and the saturated vapor pressure.

1.8.4 Measuring systems in which there is at pump stop option
liquid flow in the opposite direction than the direction of normal flow
must be provided with non-return valve fitted limiting device if necessary
pressure.

1.8.5 For measuring systems with an empty hose must have a pipeline for
meter and, if necessary, the pipework upstream of the meter, high point so that all parts
measuring systems remain constantly filled.
Draining of the delivery hose referred to in 1.4.2.1 must be ensured
air valve. In certain cases this air vent may
be replaced by special devices such as an auxiliary pump or injector
compressed air. In measuring systems designed for minimum deliveries
less than 10 m3, such devices shall operate automatically.

1.8.6 For measuring systems with a full hose must free end of the pipe
incorporate a device to ensure that the hose can not be emptied during
when the system is not used. This requirement may be met by
liquefied gases. When a closing device is placed downstream of this
device, the volume between them must be minimized and must always be less
than the maximum permissible error for the minimum delivery of the measuring system.
If the system is intended for measuring viscous liquids, must be the end
nozzles designed so that it can not retain a quantity of liquid greater
than 0.4 times the maximum permissible error for the minimum delivery of the measuring system
.

1.8.7 If the hose consists of several parts, these parts must be assembled
either a special connector to keep the hose full or by means
connection system which is either sealed or ensures | || that part will not be possible without the use of special tools separate.

1.9 Variation of internal volume of full hoses

Case of full hoses in a measuring system provided with a hose reel, the internal volume increase
hose due to the change from the coiled position when the hose
not under pressure, to the uncoiled position, when subjected to pressure, but without
flow of liquid, shall not be greater than twice the maximum permissible
error for the minimum delivery. If the measuring system is not provided with a hose
reel, the internal volume increase shall not exceed the maximum permissible error for the minimum delivery
.


1.10 Branches
1.10.1 In measuring systems intended to deliver liquids can be approved
branch of the meter only if they are arranged so that
was possible expenditure liquids only one outlet at a time. For
measuring systems intended to receive liquids may be allowed
branches upstream of the meter only when they are arranged so that at a given time

Intake of liquid from one pipe.
Deviations from these requirements may be approved in the case of delivery systems which
supply only one buyer and receiving device
who can not work for more than one supplier at a time.

1.10.2 In measuring systems operating either with an empty hose or a
full hose and having flexible pipes, if necessary, will
check valve is installed on the rigid pipework leading to the full hose and
immediately downstream from the selector valve. Selector valve shall not in any
position permit connection of the discharge hose, operating as an empty hose
pipework leading to the full hose.

1.11 Bypass piping

Any connections intended for by-passing the meter shall be closed by means
blind flanges. If the operating requirements of the bypass
this must be closed either bypass blanking plate, or double
closure of the control valve in-between. It must be possible to ensure closure by means of seals
.

1.12 Valves and control mechanisms

1.12.1 If there is danger that the supply conditions might lead to overload the meter must be installed
flow-limiting device. If this equipment
causes a drop in pressure must be placed downstream of the meter. It must be possible to seal
.

1.12.2 Various settings multi-way valves shall be easily visible and
by notches, stops or other fixing means
. Deviations from this requirement are permissible whenever the adjacent positions of the operating lever
at 90 st. or greater.

1.12.3 valves and closure mechanisms not intended to
quantity measured must, if necessary, the safety valve
to reduce the increased pressure which could arise in the measuring system.

1.13 Layout of measuring systems

Measuring system must be installed in such a manner that the indicating device was
under formal operational conditions clearly visible.
Indicating device and the gas indicator, if any, must be as
be observable from one position. Sealing devices shall be easily
accessible, plates shall be fixed irremovably and the statutory markings
must be clearly legible and indelible.

1.14 Verification for operation

Measurement system in 3.2 shall be possible.
If necessary, pipework shall be provided to return the measured liquid to a storage tank
. The measuring system must be fitted if necessary
measuring points for temperature and pressure, especially when the operation or testing
gauges requires a knowledge of these factors.

1.15 Characteristics of a measuring system, the measuring system are as follows:

- Maximum and minimum flow

- The maximum operating pressure

- Minimum operating pressure, if necessary,

- Measured liquid or liquid and the limits of kinematic or dynamic viscosity
where the indication of the kind of liquid is not sufficient to determine its
viscosity

- Minimum deliveries,

- The temperature range in the case where the liquid can be measured under - 10 ° C.
C or above + 50 st. C.


1.16 Designation
Measuring system, component or sub-assembly which has been granted approval
type refers to the following legible and indelible
data, either the dial of the indicating device or on a special descriptive plate
:

A) the EEC type approval

B) the identification mark or name of the manufacturer,

C) other type designation by the manufacturer

D) serial number and year of manufacture,

E) data on properties measuring system, as defined in paragraph
1.15

F) other complementary data given in the certificate of approval.

If several meters operate in a single system, which uses a common
devices on a single plate can be
markings required for each part of the system.

Markings on the dial indicator measuring device must not be in conflict with the label
measuring system.

If the measuring system can be transported without being dismantled the markings for each part
they can be combined on a single plate.


1.17 Seals
Sealing shall preferably be carried out by lead stamping. For
fragile instruments or where such seals are sufficiently protected against

Accidental breakage, but is allowed pincers.
Seals must in all cases be easily accessible. Seals must be placed on
all parts of measuring systems which can not be protected in any other way
against changes that could affect the transmission of measurement.
Place for seals need not be provided on connections which can be dismantled
using only tools. The sealing devices shall be so designed as to enable
affixing partial EEC initial verification.
On the design of the measuring system shall be possible to seal the stamping-plate referred to in paragraph 3.3.2.1
Annex no. 2 special legislation 2).
Can be combined with the descriptive plate on the measuring system referred to in paragraph 1.16. For
measuring system used for potable liquids, the seals shall not be fixed so that
system can be dismantled for cleaning.

Second

SPECIAL REQUIREMENTS FOR DIFFERENT TYPES OF MEASURING SYSTEMS

2.1 dispensers for liquid fuels

2.1.1 dispensers for liquid fuels are measurement systems that
intended for the delivery of liquid fuel into the fuel tanks
road vehicles. The measuring systems used for refilling
fuel to motor boats and small aircraft must be treated as
dispensers for liquid fuels. They may include their own
supply arrangement or be designed for installation in a central supply system
. The ratio between maximum and minimum
flowrates of these systems shall be at least 10: 1st

2.1.2 Where the measuring system has its own supply system must be installed
gas separator, immediately upstream of the meter.
The gas separator shall satisfy the requirements of paragraph 1.6.2.1.4 and 1.6.2.1.5
. In the case of separators which comply with the conditions set out in paragraph 1.6.2.1.5
, experience shows that the requirement is generally met when
effective volume of the separator is at least 5% of the volume of deliveries per minute at maximum flow
said on the meter nameplate. In the second case
not allowed to blow-off device mentioned in paragraph 1.7.5.

2.1.3 When the measuring system is designed for installation in a central supply system
or for refueling at a distance, one must use
general rules set out in 1.6.

2.1.4 dispensers for liquid fuels must be equipped
for resetting the volume indicator, as well as summation counter volume.
If these systems also incorporate a price indicator, this must be
marker also equipped with zeroing devices. Reset device
price indicator and volume must be installed in such a way
to reset either of these indicators automatically resets the other to zero
.

2.1.5 If the measuring system has its own supply system
electric motor must be equipped with a device that prevents fluid dispensing
after stopping the engine until the counter is reset.
In no event shall not be possible to reset the counter during delivery.

2.1.6 Check valve referred to in paragraph 1.8.4 is required.
Must be installed between the gas eliminator and the meter. However, it can be placed behind
meter if the gas eliminator is installed above the meter. In this case
may be combined with the device according to section 1.8.3. Where
check valve is installed between the gas eliminator and the meter, resulting
pressure loss must be low enough to be considered negligible.

2.1.7 hose measuring systems must contain full-hose
manual closure mechanism which meets the requirements of 1.8.6. Furthermore
it can be installed as a self-closing mechanism. Measuring systems with full
hose supplied only with a manual pump, need only incorporate the closure
mechanism referred to in section 1.8.6.

2.1.8 Measuring systems with a maximum flow rate of 60 liters / minute or less must have a minimum delivery of
most 5 liters.

2.1.9 When the measuring system is equipped with a printer ticket printer must be connected to the reset
device. Reset device must allow
print after print check by comparing the list with the pointer.

2 January 10 In accordance with Section 3.2 shall be the initial verification of measuring systems for liquid fuels
done in one or two stages depending
on whether or not they have their own supply system.

2.2 Measuring systems for road tankers for the transport and delivery of liquids

Low viscosity (dynamic viscosity <20 mPa.s)
stored at atmospheric pressure, with the exception of potable liquids

2.2.1 The requirements of Section 2.2 shall apply to measuring systems
road tankers or transportable tanks.
Measuring systems may be installed on road tankers containing one or more
chambers, each chamber must be equipped with self-closing valve
, operated either manually or automatically.

2.2.2 Each measuring system shall be used for a particular product or
category of products for which the meter has been granted EEC type approval.
Piping must be designed to be easy to avoid mixing
products.

2.2.3 Where tanks are fitted to trailers or semi-trailers, may be
measuring system is fitted to either the tractor or to the trailer or semi-trailer
.

2.2.4 A measuring system fitted to a road tanker may be
with an empty hose or a full hose. It may also have either one
empty hose and one full hose or two full hoses of different sizes
arranged so that they can be operated alternately. During
measurements may not be possible to switch to another hose.

2.2.5 When the measuring device is connected to the printer tickets must be
printer is connected to the reset of the volume indicator.

2.2.6 A measuring system fitted to a road tanker may be
so that was supplied solely by pump, solely by gravity, pump
or by gravity, or by gas pressure.

2.2.6.1 Measuring systems supplied solely by pump may operate as
full-hose systems or systems empty hose.

2.2.6.1.1 In the event of a risk that does not meet the condition set out in paragraph
1.6.2.4, the meter shall be preceded by a gas eliminator such as:

A) a suitable gas separator, which meets the requirements set out in paragraph
1.6.2.1.4 or point 1.6.2.1.5; by separators that meet
requirements set out in paragraph 1.6.2.1.5, experience shows that
requirement is generally met if the effective volume of the separator is at least 5% of the volume
deliveries per minute at maximum flow measurement system

B) air vent

C) special extractor.

If the measuring system was able to exit from the meter
pressure to drop below the atmospheric pressure but remain higher than the saturated vapor pressure
measured liquid, such devices must be combined with
automatic device which slows or stops the flow, in order
to prevent any air passing into the meter. If there is no flow
pressure at the meter outlet below atmospheric pressure (this is especially true with systems operated
full-hose) shall not be required
automatic mechanisms to slow down and stop the flow.

2.2.6.1.2 The special gas extractor with an automatic stop device shall be fitted
sight glass.

2.2.6.1.3 compartments in road tankers shall be fitted with an anti-swirl
device, except in the case where the measuring system has a gas separator
corresponding požadavkůmbodu 1.6.2.1.4.

2.2.6.2 Measuring systems operating solely by gravity shall meet the following requirements
:

2.2.6.2.1 Equipment must be designed so that the total volume of one or more
compartments can be measured at a flow rate that is greater or equal
minimum flowrate through the measuring system.

2.2.6.2.2 If there are links with the gas phase in the tank, appropriate devices
prevent any gas from entering the meter.

2.2.6.2.3 compartments of the tank must be regulated anti-swirl device, with
except where the measuring system has a gas separator in conformity with item 1.6.2.1.4
.

2.2.6.2.4 must be complied with the requirements of paragraphs 1.6.3.1, 1.6.3.2 and 1.6.3.4
If the above requirements are met, can be used at the point of transfer
accelerating pump. This pump shall not cause a pressure drop in
meter.

2.2.6.2.5 In some measuring systems, particularly those that have
special gas extractor with an automatic stop device and
among those having a permanent venting communication with the atmosphere immediately after
the point of transfer, a gas indicator is not required. For
systems, manual air-vent immediately downstream of the point of transfer
gas indicator shall be mandatory except in systems where the pressure may not
fall below atmospheric pressure.


2.2.6.3 Measuring systems which can operate either by pump or by gravity
must meet the requirements of 2.2.6.1 and 2.2.6.2.

2.2.6.4 Measuring systems fed by means of gas pressure may operate
either as empty-hose or as full-hose systems.
Pipework linking the device to prevent gas entering the meter,
as specified in paragraph 1.6.3.3, and a separate gauge
not contain any constriction or component likely to cause a pressure loss
which generates gaseous formation by releasing the gas dissolved in the liquid
. Such systems shall incorporate a manometer which indicates the pressure inside the tank
. On the scale of the pressure gauge must be marked zone
allowable pressure.

2.3 Sampling equipment for the unloading of marine, rail and road tankers


2.3.1 Measuring systems for measurement of liquids in marine,
rail and road tankers shall incorporate an intermediate tank in
which the level of the liquid determines the point of transfer. This intermediate tank may be used
gas elimination.

2.3.1.1 For road and rail tankers, the intermediate container
automatically maintain a constant level which is visible or otherwise
detectable at the start and end of the measuring operation.
Permissible variations in the constant level shall correspond to a volume that is greater than the maximum permissible error
minimum reception.

2.3.1.2 case of marine tankers is a necessary measure for automatic maintenance
levels. In this case, variations in the content must be measurable.
If the marine tanker is emptied by pumps located in the bottom of the boat, loaded
container is to be used only at the beginning and end of reception.

2.3.1.3 In both cases referred to in 2.3.1.1 and 2.3.1.2 must be
cross-section of the intermediate tank such that a quantity equal to
maximum permissible error for the minimum reception corresponds to a difference in level of at least
2 mm.

2.4 Measuring systems, whether stationary or fitted to road
tankers, for the measuring of pressurized liquefied gas (excluding cryogenic liquids
)

2.4.1 between these measuring systems and their feed tanks
must be a permanent link along rigid pipework. Among
feed tanks and the meter must be installed a check valve.

2.4.2 pressure maintenance device located downstream of the meter must ensure
product remains during the measurement in the liquid state.
The required pressure may be maintained either at a fixed value or at a value adjusted to suit measurement conditions
.

2.4.2.1 If the pressure is maintained at a fixed value, this value must be at least equal
vapor pressure of the product at a temperature which is 15 Wed.
C higher than the highest possible operating temperature. Setting the device to maintain pressure
must be sealed.

2.4.2.2 If the pressure is set so as to adapt to the conditions
measurement must be used during the measurement higher than the vapor pressure of the liquid at least 100
kPa (1 bar). This function shall be automatic.

2.4.2.3 For stationary measuring systems for industrial use, the competent metrology
authorize the use of equipment to maintain
manually adjustable pressure, the pressure at the meter outlet shall not be
less than the vapor pressure of the product at temperature 15 st. C higher than the highest
temperature of the liquid during measurement. The measuring system must
attached diagram showing the vapor pressure of the product as
function of its temperature. If it is assumed that these measuring systems
have to work unsupervised, must be temperature and pressure continuously recorded
recording device.

2.4.3 Before the meter must be installed in a gas separator, either in the form
gas separators or capacitor.

2.4.3.1 The gas separator shall satisfy the general requirements for either
liquefied gas or liquid of greater viscosity. However, due to the difficulty of verifying
is permissible that was approved gas separator
unless the effective volume of less than 1.5% of the volume of the liquid delivered at 1
minute at maximum flowrate in cases where the pipeline
connecting the meter to the storage tank is no longer than 25 m. If
pipe exceeds 25 m, the effective volume of the gas separator shall be not less than 3%
volume delivered in one minute at maximum flowrate. AT

Measuring systems for liquefied gas, no need to install
gas indicator or sight glass.

2.4.3.2 The volume of the capacitor depends on the volume line between the valve
supply tanks and pressure maintenance valve upstream of the meter.
Must not be less than twice the fluid volume, which can occur
temperature drops by a value which is conventionally set to 10 ° C. C u
pipes exposed to the atmosphere and 2 st. C u underground pipes or pipes
thermally insulated. To evaluate the volume of the capacitor
apply coefficients of thermal expansion volume 3.10-3
per degree Celsius for propane and propylene and 2.10 to 3-degree Celsius for butane and butadiene
instead of using exact values. For other products with a high vapor pressure
coefficients are determined by competent authorities
metrology. The capacitor must be equipped with a manually operated blow-off device
. The measuring system must be
capacitor located at the highest point of the pipeline. The volume calculated by the capacitor
mentioned methods can be divided into several capacitors disposed on
highest points in the pipework.

2.4.4 In the immediate vicinity of the meter must be positioned well for
thermometer. The thermometer must have a temperature scale division
least 0.5 st. C and must be calibrated. Between the meter and valve for maintaining
pressure manometer shall be fitted. For measuring systems incorporated in road tankers
sufficient connection for pressure gauge.

2.4.5 Where the measuring process is carried out on a system fitted to a road tanker
may not be the connection between the gas phases in the supply
tank and the reception tank.

2.4.6 The measuring system can be used to prevent excessive pressure
incorporate safety valves. If these valves are located behind
meter, they shall open into the atmosphere or be connected to the reception
tank. Under no circumstances shall the safety valves located
upstream of the meter be connected by piping around the meter to the valves downstream.

2.4.7 If operating conditions necessitate the use of detachable hoses, the hoses
must remain full if their volume is greater than the maximum
permissible error for the minimum delivery. Detachable full hoses shall be
special connectors for full hoses. If necessary, they must be at the end of these hoses
manual venting device.

2.4.8 The monitoring valve of the double closing device specified in paragraph 1.11
must be security reasons for any pipework by-passing the meter
option to its conclusion. In these cases, a manometer fitted between the two shut-off valves
or any other equivalent system
indicate any leaks.

2.5 Measuring systems for milk.

2.5.1 The requirements of 2.5 shall apply to portable measuring systems
used for the reception of milk by collecting tankers, to fixed measuring
systems for reception and to portable or fixed measuring systems used for
milk supply.

2.5.2 In reception equipment, the point of transfer shall consist of a constant level in
tank located upstream from the meter. This constant level shall be visible
before each measurement and after the operation and shall be automatically re-set
.

2.5.2.1 If the meter is supplied by a pump, tank may be permanent
surface installed before the pump or between the pump and the meter.

2.5.2.2 In the first case the tank may itself be supplied
gravity, by the emptying of chums, or auxiliary pump or vacuum system
. If the milk is delivered into the tank
pump or vacuum system, a gas separator is necessary, which can be
combined with the constant-level tank.

2.5.2.1.2 In the second case, the constant-level tank
act as a gas eliminator.

2.5.2.2 Notwithstanding the requirements set out in paragraph 1.8.3
meter may function with the aid of a vacuum system. In this case, the connection between
lines are tight because the pressure inside the pipework
between the constant-level tank and the meter is lower than atmospheric pressure
. It must be possible to check this tightness.

2.5.2.3 In all cases the intake pipe must be upstream of the constant level
under normal operating conditions completely emptied by an automatic device
.

2.5.2.4 The constant level shall be monitored by a sight glass or an indicator

Levels. The level will be regarded as constant when it settles within a zone
between two lines corresponding to the difference in volume of not more
than twice the maximum permissible error on minimum delivery.
The distance between the two lines must be at least 15 mm.

2.5.2.5 To be complied with the requirements of paragraph 2.5.2.4 must be
to the measuring system decelerating device, the flowrate during
slowdown must not fall below the minimum flow meter.

2.5.2.6 If in reception equipment, the liquid measured is conveyed
lower than that of the meter, the meter outlet to ensure
automatic devices pressure greater than atmospheric pressure.

2.5.3 Measuring systems for the delivery of milk shall meet the requirements in section
first

2.5.4 Notwithstanding the general requirements of section 1 regarding the elimination of air or gases
gas elimination device must meet the requirements of paragraph 1.6.1
under operating conditions only, ie when air enters at the beginning
and at the end of each measuring operation. For reception equipment, the user
be able to ensure the tightness of the connections so that during the measurement
no air upstream of the meter. For delivery equipment must be
system is arranged so that the liquid pressure in the connecting pipes from
supply tank is always constant.

Third

EEC APPROVAL AND EEC INITIAL VERIFICATION

3.1 EEC type approval

3.1.1 The following systems shall be subject to EEC type approval:

A) measuring systems for liquid fuels specified in paragraph 2.1;
If these systems are designed for installation in a central supply system,
approval certificate shall be accompanied by one or more drawings
given type that illustrate the mounting conditions at the place of use,

B) measuring systems fitted to road tankers for the transport and delivery
liquids of low viscosity (dynamic viscosity <20 cP)
stored at atmospheric pressure, except for potable liquids as
stated in paragraph 2.2

C) measuring systems for pressurized liquefied gas
fitted to road tankers, as stated in paragraph 2.4

D) measuring systems for milk intake as specified in 2.5.
3.1.2 Tests


3.1.2.1 In conducting the tests must be working standards and their use
set so that the measuring inaccuracy of the calibration method
does not exceed one-fifth of the maximum permissible error for the test measuring
system.

3.1.2.2 The test gauge

Nejprve down the curve of errors as a function of flowrate, using
sufficient number of measuring points between the minimum and maximum
flows. It is necessary to determine the margin of error in measuring flow rate range,
and the position of the error curve to the zero line is of lesser importance.
May be also carried out tests beyond the permitted flowrate limits. Tests must be carried
if possible at the operational limits, ie for the maximum
and minimum temperatures and viscosities specified and for minimum delivery.
With the exception of tests for minimum delivery, the test volume shall be selected so
to be large enough to ensure that the value of the scale
indicator is never greater than one-third of the maximum permissible error
. If you have already been granted approval of the meter and its accessories
, it is necessary to ascertain whether the characteristics of gauges and measuring
system are sufficiently compatible. If they are, the meter will not be
undergo further tests, but must be determined by the minimum delivery.
If the characteristics of the meter not be compatible with the measuring system
or should not be granted EEC type approval for measuring instrument (and its accessories
) must complete measuring system is tested in accordance with this decree
.

3.1.2.3 Tests for air or gas

The tests must show that the equipment for the separation of air and gases
meets the requirements of paragraphs 1.6.2.1.4, 1.6.2.1.5 and 1.6.2.2.4. Where gas separators and special gas extractors
is tested by comparing the continuous elimination
measurement results of a suitable volumetric meter inserted downstream of the separator
(special gas extractor) with the addition of air or gas without him.
Where special extractors are fitted, it is also necessary
test for the complete emptying of the tank. These tests should be
out with the least favorable liquid. In tests on mock-ups or

Models on a different scale from the actual equipment, must be taken into account
laws of similarity concerning viscosity (Reynolds), gravity
(Froude) and surface tension (Weber).

3.1.2.4 Tests on special measuring systems

3.1.2.4.1 measuring systems for liquid fuels

These tests must include:

A) checking of the meter, checking of ancillary equipment and determination of the influence of these
equipment (price indicator, printer, presetting etc.)

B) checking of the gas eliminator,

C) check the constancy of the volume of the hose

D) a special check to verify regular advance of the price indicator
(irregular advance may be induced in the first part of the price indicator
sudden closing of the delivery valve).

3.1.2.4.2 Measuring systems for liquefied gases

These tests must include:

A) verification of the efficiency range and the design of gas separators
drawings

B) an operating test on the gas eliminator (level regulator), which may be part
gas separator.

According to drawings will have to be verified and the pressure maintenance device.
The inspection authority may, in special cases, require examination
type.

3.1.3 In the case of the measuring systems referred to in paragraphs 2.2 and 2.4 may be
EEC type approval recognized on the basis of drawings and diagrams, provided that they comply with the provisions
point 4.

EEC initial verification 3.2

3.2.1 The EEC initial verification may be carried out by measuring systems
in one or two stages.

3.2.1.1 must be carried out in one stage when the system is entirely
manufactured by a single manufacturer, can be transported without being dismantled and
when it is verified under conditions such as operating
conditions for which it is intended.

3.2.1.2 In all other cases must be carried out in two stages
. The first stage concerns the meter only or the meter fitted
additional equipment with which it must be connected
, whether or not it is part of a subassembly.
First-stage tests may be carried out on a test rig (for example in the production
factory) or on the installed measuring system. At this stage may be
metrological tests carried out with liquids other than
liquid for which the system is intended. The second stage concerns the measuring system
under actual operating conditions. These tests must be carried out in
place of installation, under operating conditions and liquid for which the system is intended
. The second stage may be carried out in a place selected by the metrology
organization if
measuring systems can be transported without being dismantled and the tests can be
carried out under conditions in which the measuring system is to be operated.

3.2.2 If EEC initial verification is carried out in one stage, must be
performed all the tests specified in paragraph 3.2.2.1.

3.2.2.1 If the tests are carried out in two stages:

The first stage shall include:

A) examination of conformity of the meter, including any ancillary equipment (conformity to the respective patterns
)

B) the metrological examination of the meter, including built-in ancillary equipment
.

Second stage shall include:

A) examination of the conformity of the measuring system, including the meter and ancillary equipment
,

B) the metrological examination of the meter and ancillary equipment in the measuring
system

C) an operating test on the gas eliminator, if fitted;
it is not necessary to check whether the maximum permissible errors for this device as
listed in 1.6 have been exceeded,

D) control of setting the required pressure maintenance devices,

E) verify the variation of the internal volume of hoses in full-hose systems,

F) determination of residual quantities in empty-hose systems.

Fourth

Measuring systems fitted to road tankers
4.1 General requirements


Measuring systems fitted to road tankers referred to in items 2.2 and 2.4
may obtain EEC pattern approval solely on the basis of an examination of the documents
if they are in conformity with one of the standard schemes referred to in paragraph 4.2
and fulfill the requirements set out below:

4.1.1 Identification standard scheme adopted must be added to indicate
specified in Section 1.16.

4.1.2 The components of the measuring system must have received EEC approval if

Such approval is specified in special legislation. ^ 3)

4.1.3 If a tank has several compartments, may be the outlet pipes from chambers
connected to a measuring system directly or distributor unless specified otherwise
in the relevant standard scheme.
The second paragraph of item 2.2.1 shall be used in all cases. If the measuring system
connected to several compartments switchboard, there must be a device that prevents
simultaneous connection of various chambers of the measuring system.
This requirement is not necessary if the measuring system has a gas separator in conformity with item 1.6.2.1.4
.

4.1.4 If a road tanker has two measuring systems which can be
connected as required to one or more specific compartments, must be
pipes and valves arranged so that the chamber can not be the same || | simultaneously connected to two measuring systems. In addition, the connection must be
between compartments and measuring systems clearly marked to prevent
bad connection chamber to a measuring system not designed to measure
product contains.

4.1.5 If desired anti-vortex device may be combined with
valve at the bottom of the chamber.

4.1.6 Pipes, valves and taps between compartments and measuring systems must
be arranged in such a way that it is impossible to connect a measuring system to
tank separate from the road tanker.

4.1.7 filter located immediately upstream of the meter or the degassing
device may be part of the instrument.

4.1.8 In order to meet the relevant requirements must be possible to seal
devices which allow delivery without passing through the meter.

4.1.9 Where measuring systems include two-way valves, these valves
must be designed so that simultaneous communication between the three orifices impossible
.

4.2 Sample schemes

Model layout diagrams of measuring systems on road tankers.
Example diagram S1


Gravity system with continuous venting at the point of transfer.

Allows: metered delivery only (empty hose).

Explanation to the standard scheme S1

If a tank has several compartments, the measuring system must be directly and permanently
connected to a specific compartment without a manifold.

A: Anti-swirl device.

F: Filter. The filter must be designed and installed in such a way that
It could be cleaned without emptying the meter or
window (V1 or V2).

T1, T2: Variants authorized the removal of gas.

T1: blow-off valve and check valve to prevent sucking gas into
measuring system.

T2: return to the gaseous phase in the tank.

Car: Non-return valve to prevent gas flow options
temperature pressure in the tank.

C: Meter.

Vm: Operating valve.

I and II: Variants of the delivery device running empty
hose.

V1: Sight glass with overflow edge.

V2: Sight described in paragraph 1.1.8, serving as
a gas indicator.

At: Permanent air vent of sufficient cross-section to ensure
that the pressure in the meter at least equal
atmospheric pressure.

Permanent venting may be provided by a vertical tube
without valve. When this tube is connected to the top
tanks, overhead valve "car" is not necessary.

H level above point of transfer.

H: Height of bottom of tank above point of transfer. It must be
sufficient to ensure a flow rate at least equal
minimum flow meter to completely empty
cisterns.
Example diagram S2


Gravity system without continuous bleeding at the point of transfer during
output.

Allows for: a) metered delivery (empty hose);

B) direct unmetered delivery, emptying and filling of the tank without passing through the meter
.

Explanation to the standard scheme S2

Pipes between compartments and the measuring system should ensure that
connection.
A: Anti-swirl device.

R: Two-way valve allowing metered delivery, unmetered
delivery and emptying and filling of the tank without passing through
meter.

F: Filter. The drain valve is authorized only if
if it includes a non-return valve preventing tick
gas into the measuring system.

PgS: Special gas extractor as described in paragraph 1.1.5.


V1: Sight glass of special gas extractor.

T1, T2, T3, T4 ,: options approved for venting devices.
T1: Returning to the tank.
T2: Blowing into the atmosphere.
T3: vessel to trap liquid particles
entrained gases.
T4: blow-off valve.

C: Meter.

Va: A special air vent self-closing valve
in case of insufficient pressure, preventing
vaporization in the meter or when a special
the extractor accumulate gas pockets. Moreover, this
Valve must in case of failure of the control system
close.

I and II: Variants of the delivery system with empty hose.
Option I: Sight with overflow edge V2.
Option II: Sight described in paragraph 1.1.8, as well
working as a gas indicator V3.

Vm: Operating valve.

Self valve va and the operating valve Vm may be
combined in a special filling valve both functions.
In this case it must be these two functions together
independently.

In variant II, this special valve must be placed
at the sight glass V3.

At: manual valve. Can be self (eg.
Automatically closed during the measuring operation and opened after completion
).

H: height of water above the point of transfer.

H: Height of bottom of tank above point of transfer. It must be
sufficient to ensure a flow rate at least equal
minimum flow meter to completely empty
cisterns.
Example diagram S3


Measuring system pump, a gas separator and one or two full hoses
.

Enables: a) metered delivery by pump (full hose);

B) direct unmetered delivery (with or without pump), emptying and filling
tank without passing through the meter.

Explanation to the standard scheme S3
R1: Two-way valve allowing metered delivery, unmetered
delivery and filling and emptying the tank without passing through
meter.

P: Pump. The pump may be reversible. In this case
must be added to the check valve between the valve R2
and the gas separator Sg.

R2: Optional two-way valve for direct unmetered delivery.

F: Filter. The filter may be connected with a drain valve.

Sg: Gas separator according to 1.6.2.1.4. The fluid level
separator must be above that in the meter.

T1, T2: Variants authorized for the venting.
T1: direct return to the tank.
T2: return to the tank via a vessel to catch liquid
particles entrained gases.

C: Meter.

Vm: Operating valve.

Cl: Check valve.

FL1: Full hose on reel.

Fl2: Optional second full hose (very short) for delivery
high speed.

Duties: Valve preventing the full hose from emptying.

R3: Device allowing deliveries to be made with either hose
the hose measuring system. This device must be
in accordance with the first paragraph of item 1.10.1 and the second
paragraph of item 2.2.4.

Example diagram S4

Measuring system has a pump, a gas separator, one empty hose or
one full and one empty hose.

Allows for: a) metered delivery by pump (full or empty hose);

B) specific gravity-delivery (empty hose);

C) direct unmetered delivery (with or without pump), emptying or
filling of the tank without passing through the meter.

Explanation to the standard scheme S4 ​​
R1: Two-way valve for metered delivery, unmetered delivery
and filling and emptying of the tank without passing through the meter.
This valve is optional. It may be replaced by direct
merger.

P: Pump. The pump may be reversible. In this case
must be added to the check valve between the valve R2
and the gas separator Sg.

B: Optional bypass allowing metered gravity delivery
(Empty hose). This bypass is authorized only if
If there is no valve R1.

R2: Optional two-way valve for direct unmetered delivery.

F: Filter. The filter may be connected with a drain valve.

Sg: Gas separator according to 1.6.2.1.4. The fluid level
separator must be above that in the meter.


Car: Non-return valve preventing gas flow (in the case
empty hose delivery).

C: Meter.

M: Removable pressure gauge is only necessary if the bypass B.

This creates the possibility of withdrawing examination during
initial verification, if the pressure in the meter during
gravity dispensing is at least equal to atmospheric.

At: Automatic or manual venting. If there is a bypass B
vent must be automatic and of sufficient cross-section to
ensuring that the pressure in the meter at least equal
atmospheric pressure.

Vm: Operating valve.

I and II: Variants of the delivery device
Option I: empty hose.
Variant II: combinations of one full and one empty
hose.

Cl: Check valve.

V1: Sight glass with overflow edge.

V2: Sight by 1.1.8, also serving as an indicator
gas.

FL1: Full hose on reel.

Duties: Valve preventing the full hose from emptying.

R3: Device allowing deliveries to be made with either hose
the hose measuring system. This device must be
in accordance with the first paragraph of item 1.10.1 and the second
paragraph of item 2.2.4.
Example diagram S5


The measuring system includes a pump, a gas separator and one or two full hoses
.

Allows only metered delivery by pump (full hose).

Explanation to the standard scheme S5

If a tank has several compartments, the measuring system must be directly and permanently
connected to a specific compartment without a manifold.
A: Anti-swirl device.

V: Valve type "open or closed" making any
deceleration entering pump practically impossible.

M: Pressure gauge to check whether the pressure at the pump
It is never less than atmospheric pressure.

P: Pump.

F: Filter.

The drain valve is authorized only if it includes
return valve preventing tick gas to the measuring
system.

Pg: Breather. Two variants of the T1 and T2, and credentials
venting devices.

T1: Direct link between the gas extractor and the tank. In that
eventually must lead pipe into the tank along the wall
facilitate separation of liquid particles and gases.

T2: Gas extractor connected to the tank by a vessel
catch liquid particles entrained gases.

C: Meter.

Vm: Operating valve.

Cl: Check valve.

FL1: Full hose on reel.

Fl2: Optional second full hose (very short) for delivery
high speed.

Duties: Valve preventing the full hose from emptying.

At: Automatic or manual venting.

R3: Device allowing deliveries to be made with either hose
the hose measuring system. This device must be
in accordance with the first paragraph of item 1.10.1 and the second
paragraph of item 2.2.4.
Example diagram S6


Measuring system includes a gas separator combined with the supply pump
one or two full hoses, or one full and one empty hose
.

Allows for: a) metered delivery by pump (full or empty hose);

B) direct delivery with or without pump, without passing through the meter and
emptying and filling of the tank without passing through the meter.

Explanation to the standard scheme S6
R1: Two-way valve for metered delivery, unmetered delivery
and filling and emptying of the tank without passing through the meter.

This valve is optional. It may be replaced by direct
merger.

F: Filter. The filter may be connected with a drain valve.

SGP: Gas separator combined with the supply pump as
It described in the first paragraph of section 1.6.2.1.2. This
subassembly must satisfy the requirements set out in paragraph
1.6.2.1.4. EEC must receive approval.

CL1: Check valve. It may be located downstream.

R2: Optional two-way valve for direct unmetered delivery.

C
Meter
I, II, III: Variants of the delivery device
Variant I: one or two full hoses.
Variant II: empty hose.
Variant III: combinations of one full and one empty
hose.

Vm: Operating valve.

V1: Sight glass with overflow edge.


V2: Sight by 1.1.8, also serving as an indicator
gas.

FL1: Full hose.

Fl2: Optional second full hose (very short) for delivery
at high speeds.

Duties: Valve preventing the full hose from emptying.

CL2: Check valve.

At: Automatic or manual venting.

R3: Device allowing deliveries to be made with either hose
the hose measuring system. This device must be
in accordance with the first paragraph of item 1.10.1 and the second
paragraph of item 2.2.4.
Example diagram S7


The measuring system includes a pump, a special gas extractor, one or two
full hoses, or one empty hose or one full and one empty hose
.

Allows for: a) metered delivery by pump (full or empty hose);

B) metered gravity delivery (empty hose);

C) direct delivery with or without pump, without passing through the meter and
emptying and filling of the tank without passing through the meter.

Explanation to the standard scheme S7

If a tank has several compartments and if it is possible to use a manifold,
valves at the bottom of the chambers and valves on the intake pipe must be of
"open or closed". Pipes between compartments and the measuring system must
be permanently connected.
A: Anti-swirl device.

R1: Two-way valve for metered delivery, unmetered delivery
and filling and emptying of the tank without passing through the meter ..

This valve is optional. It may be replaced by direct
merger.

P: Pump. The pump may be reversible. In this case
must be added to the check valve between the valve R2
and the gas separator Sg.

B: Optional bypass allowing metered gravity delivery
(Empty hose).
This bypass is authorized only if it is not
installed valve R1.

R2: Optional two-way valve for direct unmetered delivery.)

F: Filter. The drain valve is authorized only if
if it includes a non-return valve preventing any admission
gas into the measuring system.

PgS: Special gas extractor according to paragraph 1.1.5.

V1: Sight glass of special gas extractor.

T1, T2, T3: Variants authorized for the venting.
T1: vessel to catch liquid particles entrained
gases.
T1: return to the tank.
T1: blow-off valve.

C: Meter.

Va: The self-closing valve special gas extractor,
when the pressure is insufficient to prevent vaporization
in the meter or when a gas accumulates in an air
pockets. Moreover, the valve must close in the event of failure
control system.

I, II, III: Variants of the delivery device
Variant I: one or two full hoses.
Option I: empty hose.
Variant II: combinations of one full and one empty
hose.

Vm: Operating valve.

Self valve va and the operating valve Vm may be
combined in a special valve performing both
function. In this case it must be these two functions together
independently. This special valve must be placed behind
sight glass V3 in variants II and III to this
sight glass contain.

Cl: Check valve.

V2: Sight with overflow edge.

V3: Sight by 1.1.8, also serving as an indicator
gas.

FL1: Full hose on reel.

Fl2: Optional second full hose (very short) for delivery
at high speeds.

Duties: Valve preventing the full hose from emptying.

At: Automatic or manual venting.

R3: Device allowing deliveries to be made with either hose
the hose measuring system. This device must be
in accordance with the first paragraph of item 1.10.1 and the second
paragraph of item 2.2.4.
Example diagram S8


The measuring system includes a pump, three-way valve, a special
gas extractor, one or two full hoses, or one empty
or one full hose and one empty hose.

Allows for: a) metered delivery by pump (full or empty hose);

B) metered gravity delivery (empty hose);

C) direct delivery with or without pump, without passing through the meter and
emptying and filling of the tank without passing through the meter.

Explanation to the standard scheme S8


If a tank has several compartments and if it is possible to use a manifold,
valves at the bottom of the chambers and valves on the intake pipe must be of
"open or closed". Pipes between compartments and the measuring system must
be permanently connected.
A: Anti-swirl device.

P: Pump.

R0: Three-way valve which, in conjunction with valves R1 and R2,
allowing you to make the following operations:
First metered and unmetered delivery by pump (full or empty hose
)
2nd Gravity measured or unmetered delivery (empty
hose), emptying and filling of the tank,
3. Filling the tank using a pump P.

R1: Two-way valve is optional. It may be replaced by
Direct dial.

F: Filter.

The drain valve is authorized only if
It comprises a check valve preventing any admission of gas to
measuring system.

CL1: Check valve.

PgS: Special gas extractor according to paragraph 1.1.5.

V1: Sight glass of special gas extractor.

T1, T2, T3: Variants authorized for the venting.
T1: vessel to catch liquid particles entrained
gases.
T1: return to the tank.
T1: blow-off valve.

C: Meter.

Va: A self-closing valve special gas extractor,
when the pressure is insufficient to prevent vaporization
in the meter or when a gas accumulates in an air
pockets. Moreover, the valve must close in the event of failure
control system.

I, II, III: Variants of the delivery device
Variant I: one or two full hoses.
Variant II: empty hose.
Variant III: combinations of one full and one empty
hose.

Vm: Operating valve.

Self valve va and the operating valve Vm may be
combined in a special valve performing both
function. In this case it must be these two functions together
independently. This special valve must be placed behind
sight glass V3 in those variants (II and III) that
This sight glass include:

CL2: Check valve.

V2: Sight with overflow edge.

V3: Sight by 1.1.8, also serving as an indicator
gas.

FL1: Full hose on reel.

Fl2: Optional second full hose (very short) for delivery
at high speeds.

Duties: Valve preventing the full hose from emptying.

At: Automatic or manual venting.

R3: Device allowing deliveries to be made with either hose
the hose measuring system. This device must be
in accordance with the first paragraph of item 1.10.1 and the second
paragraph of item 2.2.4.
Example diagram S9


The measuring system includes a pump, separator, valve and a full hose.

Enables: a) metered delivery by pump (full hose);

B) unmetered delivery with or without pump, draining and filling
tank without passing through the meter

Explanation to the standard scheme S9
R1: Two-way valve for metered delivery, unmetered delivery
and filling and emptying of the tank without passing through the meter.

This valve is optional. It may be replaced by direct
merger.

P: Pump.

B: Adjustable pump bypass connected to the tank.

R2: Optional two-way valve for direct unmetered delivery.

CL1: Check valve specified in paragraph 2.4.1. It may also be
placed between the filter and gas separator.

F: Filter.

Sg: Gas separator in conformity with either item 1.6.2.1.4 or
the second paragraph of item 2.4.3.1. Venting device
It is connected to the gaseous phase of the tank. For security
reasons, this device can be fitted with a valve. In that
It must be fitted between the tank and the branch
to the valve 'vamp'.

C: Meter.

Vamp: Self-sustaining valve pressure set on pressure
at least 100 kPa higher than the saturated vapor pressure
in the tank.

Vm: Operating valve.

CL2: Check valve.

Z: piping the gas phase, which can be used only
filling the tank of the vehicle and return the product during
testing of the measuring system.

Th: Thermometer. This thermometer must be situated near
meter, either in the gas separator, or the inlet to
meter or meter outlet.


M: Compulsory pressure gauge.

M0: Optional pressure gauges.

Note: a) to ensure that the requirements set out in paragraph
2.4.5 have been met, the label must clearly
indicated that the gaseous phase of the vehicle tank and the tank
the customer must be joined.
b) they must be included in the safety valves. In that
It must be in accordance with the requirements of paragraph 2.4.6.

1) Decree no. 262/2000 Coll., Which provides uniformity and accuracy of measuring instruments and measurements
.

2) Decree no. 332/2000 Coll., That lays down some procedures
type approval and verification of measuring instruments known brand
EEC.

3) Decree no. 21/2001 Coll., Laying down the requirements
flowmeters for liquids other than water-marking EEC and the ancillary equipment
these flow meters.