connections shall be provided.
Note 2: Extra strong (XS) minimum weight.
Conform to ASME B31.1 for wall
thickness.
TABLE II.
FITTINGS
mm Service
Size
Title
Materials
Specification
Steam (1)
Under
Threaded
Malleable-iron
ASME B16.3
80 mm
Under
Threaded
Steel
ASME B16.11,
80 mm
80 mm
&
Flanged
Steel
ASME B16.5
larger
8 mm
&
Buttwelded
Steel
ASME B16.9
larger
Condensate
Under
Threaded
Cast-iron
ASME B16.4
return
80 mm
Black, Class 250
Under
Threaded
Malleable-iron
ASME B16.3,
80 mm
Class 300
Under
Threaded
Bronze
ASME B16.15
80 mm
80 mm
&
Buttwelded
Steel
ASME B16.9
larger
extra strong
Vent pipe
Under
Threaded
Malleable-iron
ASME B16.3
80 mm
80 mm
Buttwelded
Steel
ASME B16.9
& larger
Under
Threaded
Zinc-coated
ASME B16.3
pipe
80 mm
malleable-iron
80 mm
Buttwelded
Steel
ASME B16.9
& larger
Boiler
Under
Threaded
Malleable-iron
ASME B16.3
feed (2)
80 mm
80 mm
Buttwelded
Steel
ASME B16.9
& larger
Feedwater
Under
Threaded
Malleable-iron
ASME B16.3
pipe
80 mm
80 mm
Buttwelded
Steel
ASME B16.9
& larger
Blowoff
All
Buttwelded
Steel
ASME B16.9
lines (2)
Socket
welded
Steel
ASME B16.11
Flanged
with long
radius
elbows
Steel
ASME B16.5
Water
column
SECTION 15559A
Page 113
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