(a) Pressure gauges shall be designed for the normal pressure and temperature conditions to which the devices may be subjected with a burst pressure safety factor of at least four. (b) Dials shall be graduated to read 1.2 times the maximum operating pressure of the system to which the gauge is attached. (c) A gauge shall have an opening not to exceed 0.055 inches (number 54 drill size) at the inlet connection.


Source Note: The provisions of this §13.28 adopted to be effective November 15, 1990, 15 TexReg 5936.