valves installed on buried [RTR] [PE] piping shall have mechanical joint
ends [except where flanged ends are indicated]. [Cast iron valves
installed on buried [steel] [RTR] [PE] piping shall have mechanical joint
ends [except where flanged ends are indicated].] [Valves not on buried
piping shall have ends as indicated.] Plug valves shall be lubricated.
Lubricating fittings on installed valves shall be accessible for
relubrication, or extensions shall be provided to make them accessible.
Plug valves shall be wrench or gear operated. [Wrench operated valves
shall have a 50 mm 2 inch square adaptor securely fastened to the valve
stem.] Maximum allowable operating torque in Newton-meter foot-pounds shall
be limited to:
Nominal Valve Size
Torque
(mm)
(Newton-meter)
[20] [25] [40] [50]
[34.00]
[80] [100]
[47.60]
[150] [200] [300]
[95.20]
Nominal Valve Size
Torque
(Inches)
(Foot-Pounds)
[3/4] [1] [1-1/2] [2]
[25]
[3] [4]
[35]
[6] [8] [12]
[70]
2.3.1.2
**************************************************************************
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 or MSS SP-72 or MSS SP-110. Provide valve body material of
carbon steel for installation on steel pipe, and ductile iron for
installation on plastic pipe. Valves installed on buried steel piping
shall have butt welding ends. Valves with welded ends shall be designed to
permit replacement of seats and seals without removing the valve body from
the line. 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.
Valves used on buried [RTR] [PE] mains shall have mechanical joint ends
[except where flanged ends are indicated]. [Valves not on buried piping
shall have ends as indicated]. Ball valves shall be wrench or gear
operated. [Wrench operated valves shall have a 50 mm 2 inch square adaptor
securely fastened to the valve stem.] Maximum allowable operating torque in
Newton-meter foot-pounds shall be limited to:
Nominal Valve Size
Torque
(mm)
(Newton-meter)
[20] [25] [40] [50]
[34.00]
[80] [100]
[47.60]
[150]
[68.00]
[200] [300]
[95.20]
SECTION 02551N
Page 14
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