2.15.1.2
Fittings
a.
Fittings for steel pipe:
(1) Sizes 6 to 50 mm 1/8 to 2 inches: ASME B16.3 malleable iron,
screwed end fittings, for working pressures not greater than 2068
kpa (gage) 300 psig at temperatures not greater than 232 degrees C
450 degrees F or ASME B16.11 forged steel.
(2) Sizes 6 to 50 mm 1/8 to 2 inches:
ASME B16.11 steel, socket
welded end fittings.
(3) Sizes 6 to 65 mm 1/8 to 2 1/2 inches:
ASME B16.9 steel, butt
welding fittings.
(4) Sizes 65 to 600 mm 2 1/2 to 24 inches:
ASME B16.5 forged
steel, flanged fittings.
b.
Welded outlets and welding saddles: Make branch connections of 45
and 90 degrees either with ASME B16.9 or ASME B16.28 forged steel
welded outlet fittings or welding saddles.
Welding outlets and
saddles shall not be smaller than two pipe sizes less than the
main pipe sizes.
c.
Fittings for copper tubing: ANSI B16.18 cast bronze solder joint
or ASME B16.22 wrought copper solder joint. For instrument air,
fittings may be ASME B16.26 compression joint type.
d.
Unions:
(1) Unions for steel pipe: ASME B16.11, ASME B16.39 threaded.
Unions for zinc coated pipe shall be zinc coated.
(2) Unions for copper tubing: ASME B16.22.
For instrument air,
unions may be compression joint type.
2.15.1.3
Flanges
ASME B16.5, forged steel, welding type. Remove the raised faces on flanges
when used with flanges having a flat face. Except as specified otherwise,
pressure and temperature limitations shall be as specified in ASME B16.5
for the proper class and service, and the type face specified.
2.15.1.4
Valves
a.
Valves for maximum working pressure of 1034 kpa (gage) 150 psig
saturated steam or 1550 kPa (gage) 225 psig W.O.G. (Water, Oil,
Gas) at 93 degrees C 200 degrees F (non-shock service). (For
working pressures not exceeding 862 kPa (gage) 125 psig saturated
steam or 1379 kpa (gage) 200 psig water at 93 degrees C 200
degrees F non shock service, Class 125 may be used in lieu of
Class 150 or Class 250).
(1)
Valve sizes 50 mm 2 inches and smaller:
(a) Non throttling valves: Gate valves, bronze, wedge disc,
rising stem, Class 150, MSS SP-80 or ball valves, bronze, double
stem seals, stainless steel ball and shaft, tight shutoff.
SECTION 15502N
Page 163
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