Nominal Valve Size
(Inches)
(Foot-Pounds)
[3/4] [1] [1-1/2] [2]
[25]
[3] [4]
[35]
[6]
[50]
[8] [12]
[70]
2.3.1.3
Below Ground Polyethylene Valves
ASME B16.40.
Provide PE valves only with underground PE piping.
2.3.2
Gas Main Regulator Station
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NOTE: Pressure regulators are necessary at all
points where design requires reduction in or
regulation of pressure. When gas pressure
regulators are required for a specific project, all
necessary equipment should comply with the
requirements of the local gas company and this
paragraph should be so revised as necessary. A
detail of each regulator installation should be
shown on the drawings and the following data should
be provided for each regulator: flow rate, type and
specific gravity of the gas inlet and outlet
pressures, accuracy of control and size of
connections.
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Includes regulator valve, relief valve, strainer, regulator by-pass piping,
and plug or ball type shut-off valves as indicated. Regulator station
piping and piping from buried gas lines to the regulator station shall be
steel piping as specified for gas distribution main piping. Regulator
station piping, fittings and valves shall be welded joint [except where
[flanged] [and] [threaded] joints are indicated]. Pipe and equipment
supports shall be of non-combustible material. Regulator station shall be
located [in an underground vault] [aboveground] as indicated.
2.3.2.1
Regulator Valve
Steel or ductile-iron body, flanged ends for sizes 65 mm 2 1/2 inches and
larger and threaded ends for sizes 50 mm 2 inches and smaller. Regulator
valve shall conform to indicated size, capacity, and reduction of indicated
pressure requirements. Provide overpressure protection to prevent gas
pressure from exceeding the indicated value in accordance with ASME B31.8.
2.3.2.2
Pressure Relief Valve
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NOTE: Delete the bracketed portion of this
paragraph which is not applicable to the gas
pressure of the system being designed. See the
first note of this section for the definition of
system pressure class.
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Provide to prevent gas pressure from exceeding the indicated value, have
SECTION 02551N
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