2.4
SHUTOFF VALVES, BELOW GROUND
[2.4.1
Metallic Ball Valves
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NOTE: Choose this paragraph or the paragraph below
entitled "PE Ball or Plug Valves."
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[ANSI B16.33] [or] [ASME B16.38] corrosion-resisting steel, with threaded
or flanged ends. Provide polytetrafluoroethylene (PTFE) seats.
][2.4.2
PE Ball or Plug Valves
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NOTE: PE ball or plug valves: Class 1 location
means not more than 10 living units, homes and
separate living units within apartment buildings,
along a 1600 meters one mile length of pipeline;
Class 2 location means not more than 46 living
units, along a 1600 meters one mile length of
pipeline; Class 3 location means not more than 20
persons normally congregating in any one building or
outdoor location; and Class 4 location means any
location where Class 1 to 3 population densities are
exceeded. The Class 4 class factor also applies
where there are buildings of more than three stories.
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ASME B16.40 and ASTM D 2513, Class C materials (PE 2306 or PE 3406),
strength rating of Class [1 location with class factor of 0.32] [2 location
with class factor of 0.25] [3 location with class factor of 0.25] [4
location with class factor of 0.20], and SDR matching PE pipe dimensions
and working pressure.
]2.5
VALVES, ABOVEGROUND
[Provide lockable valves where indicated.]
2.5.1
Shutoff Valves, Sizes Larger Than 50 Millimeters 2 Inches
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NOTE: Choose one of the options below.
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NOTE: Do not use cast-iron material for valve body
or gas-meter body in seismic zones 3 and 4.
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[[Cast-iron] [or] [steel] body ball valve with flanged ends in accordance
with ASME B16.38. Provide PTFE seats.]
[Cast-iron body plug valve in accordance with ASME B16.38, nonlubricated,
wedge-mechanism or tapered lift plug, and flanged ends.]
2.5.2
Shutoff Valves, Sizes 50 Millimeters 2 Inches and Smaller
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SECTION 15195N
Page 11
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