MIL-HDBK-1003/3
Table 8
Piping Materials
SERVICE
PIPE
FITTINGS
Suction line
Hard copper tubing
Wrought copper, wrought
(Refrigerant)
Type L(1)
Brass, or tinned cast
Steel pipe, standard
brass, 150 lb welded or
wall lap welded or
threaded malleable iron
seamless for sizes
larger than 2 in. IPS
Liquid line
Hard copper tubing
Wrought copper, wrought
(Refrigerant)
Type L(1)
or tinned cast brass,
Steel pipe: extra
300 lb welded or
strong wall for sizes threaded malleable iron
1-1/2 in. IPS and
smaller. Standard wall
for sizes larger than
1-1/2 in. IPS, lap
welded or seamless for
sizes larger than 2 in.
IPS
Hot Gas Line
Hard copper tubing
Wrought copper, wrought
(Refrigerant)
Type L(1)
brass or tinned cast
Steel pipe, standard
brass, 300 lb welded or
wall lap welded or
threaded malleable iron
seamless for sizes
larger than 2 in. IPS
Chilled Water
Black or galvanized
Welded, galvanized,
steel pipe(2)
cast, malleable, or
Hard copper tubing(2)
black iron (3)
Cast brass, wrought
copper, or wrought brass
Condenser or
Galvanized steel
Welded, galvanized cast,
Makeup Water
pipe(2)
malleable iron(3)
Cast brass, wrought
copper, or wrought brass
67
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