2.19.3
Nipples
Nipples shall conform to ASTM A 733, Type I or II, as required to match
adjacent piping.
2.19.4
Unions
Unions shall conform to ASME B16.39, type as required to match adjacent
piping.
2.19.5
Pipe Threads
Pipe threads shall conform to ASME B1.20.1, right- or left-hand tapered
thread as required.
2.19.6
Pipe Expansion
2.19.6.1
Expansion Joints
Expansion joints shall be designed for a HTW working pressure not less than
[_____] kPa psig and shall be in accordance with applicable requirements of
ASME B31.1 and EJMA Stds. End connections shall be flanged. [Service
outlets shall be provided where indicated or required.] Type II joints
shall be suitable for repacking under full line pressure.
2.19.6.2
Flexible Ball Joints
Flexible ball joints shall be constructed of [stainless steel] [carbon
steel] or other alloys as appropriate for the service intended. The joints
shall be flanged or welded end as required and shall be capable of
absorbing the normal operating axial, lateral, or angular movements or
combination thereof. The ball-type joint shall be designed and constructed
in accordance with ASME B31.1 and ASME BPVC SEC VIII D1 where applicable.
Flanges shall conform to the diameter and drilling of ASME B16.5. Molded
gaskets shall be suitable for the service intended.
2.19.7
Valves
Valves shall be installed at all indicated locations, where specified, and
where required for proper functioning and servicing of the system.
Motor-operated valves shall be capable of closing speeds of 2.5 to 5.1
mm/sec 6 to 12 inches/minute. Motor operators shall be equipped with
position indicators, valve stem protectors above the motor operating units,
and auxiliary handwheels for manual operation of the valves in the event of
power failure. Motors shall be suitable for operation on the electric
current characteristics indicated.
2.19.7.1
Check Valves
**************************************************************************
NOTE: The designer will indicate the type of
valves, vertical lift or horizontal, on the drawings.
**************************************************************************
a.
Valves for Class 125 125 pound class steel piping shall conform to
the following:
(1) Sizes 65 mm 2-1/2 inches and less, bronze:
MSS SP-80, Type 3
or 4, Class 125.
SECTION 15555A
Page 60
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