c.
Requirements of ASME B31.1 apply to the building steam heating and
steam distribution piping designed for 103 kpa (gage) 15 psig or
lower and hot water heating systems 207 kpa (gage) 30 psig or
lower.
2.15.1
Materials
Suitable for the maximum pressure at the maximum temperature at which the
equipment must operate.
2.15.1.1
Pipe Materials
a.
Steel pipe
(1) Steam pipe, boiler feedwater pipe, relief pipe and steam
tracer pipe: Black, ASTM A 53 or ASTM A 106 seamless steel pipe,
Grade A or B. Wall thickness not less than Schedule 40. Steam
tracer pipe, with steam up to 103 kPa (gage) 15 psig, may be ASTM
B 88M ASTM B 88, type K copper tubing.
(2) Condensate pipe and boiler blowdown pipe: Black, welded or
seamless ASTM A 53 or ASTM A 106, steel pipe, Grade A or B. Wall
thickness not less than extra strong (XS or Schedule 80).
(3) Chemical feed pipe and coal pile-runoff water sump pump
discharge piping: ASTM A 312/A 312M austenitic stainless steel.
(4) Fuel oil pipe:
ASTM A 53 or ASTM A 106, seamless black steel
pipe, Grade A or B.
(5) Treated water, hot water heating, high temperature water,
drains (other than sanitary), and overflow pipe: black, welded or
seamless steel up to a maximum pressure of 1724 kPa (gage) 250 psig
or ASTM A 53 or ASTM A 106, Grade A or B.
(6) Gas pipe and compressed air pipe: Welded or seamless pipe up
to a maximum pressure of 1724 kpa (gage) 250 psig or ASTM A 53 or
ASTM A 106, Grade A or B.
b.
Copper tubing
(1) Instrument air pipe: ASTM B 88M ASTM B 88 hard copper
tubing, Type K or L; except in a corrosive atmosphere or outside
pipe shall be copper tubing, Type K or L, with ASTM D 1047 PVC
jacketing.
(2) Steam tracer pipe: Contractor may at the Contractor's option
provide ASTM B 88M ASTM B 88, Type K, copper tubing for steam up
103 kPa (gage) 15 psig.
(3) Potable water, sanitary drains and storm drains: As
specified in Section 15400 PLUMBING SYSTEMS, unless otherwise
specified. Chlorinated polyvinyl chloride (CPVC) and other
plastic tubing and fittings shall not be used in the steam heating
plant.
SECTION 15502N
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