shall exceed that of the pipe on which installed. Fittings shall have
passed sustained pressure tests at 379 kPa (gage) 200 psig and burst
pressure tests at 2758 kpa (gage) 400 psigconforming to ASTM D 1598 and
ASTM D 1599 test methods respectively.
2.2
PIPING MATERIALS FOR GAS SERVICE LINES
2.2.1
Steel Pipe, Fittings, Joints and Jointing Materials
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NOTE: When gas main piping paragraphs are not
included in the job, include the applicable
information from those paragraphs in this paragraph
and the paragraph below entitled "PE Pipe and Heat
Fusion Fittings."
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As specified for steel pipe for gas distribution mains. Threaded fittings
shall be black malleable iron or steel. Do not install close nipples and
unions underground. Pipe and fittings shall have welded joints [except as
otherwise indicated or specified]. [Do not use threaded joints [except
where indicated].] Pipe shall receive one of the shop-applied coatings
specified in paragraph entitled "Shop-Applied Coatings for Buried Steel
Pipe and Fittings."
2.2.2
PE Pipe and Heat Fusion Fittings
Conform to ASTM D 2513. Minimum wall thickness shall be as specified in
ASTM D 2513. PE pipe and fittings shall have joints as specified for gas
distribution main piping.
2.3
GAS MAIN VALVES AND ACCESSORIES
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NOTE: When valves are to be installed in RTR or PE
pipe or tubing, the project drawings shall include a
detail showing the anchors to be installed and the
technique to be used to ensure that no turning
torque is imposed on the pipe.
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2.3.1
Shut-Off Valves
Manually operated shut-off valves for gas distribution main and regulator
station piping with a minimum pressure rating of 1034 kPa (gage) 150 psig.
2.3.1.1
Plug Valves
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NOTE: Use reduced bore (65 percent area minimum)
valves when resultant pressure drop is permissible;
otherwise, use full bore (95 percent area) valves.
**************************************************************************
[API Spec 6D for steel valves] [or] [MSS SP-78 for cast iron valves].
Valves shall be [full bore] [reduced bore] type. Minimum bore size for
[full bore] [reduced bore] valves shall be [95] [65] percent of the
internal cross sectional area of pipe of the same nominal diameter. Steel
valves installed on buried steel piping shall have butt-welding ends. Steel
SECTION 02551N
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