20
c. Pipe "c" diameter (main pipe, between outdoor gather pipe and the first branch pipe)
Model
Gas pipe side
Liquid pipe side
Diameter
Connecting method
Diameter
Connecting method
AU282FHERA
φ15.88
Flared joint
φ9.52
Flared joint
AU482/NFIERA (G)
φ19.05
φ9.52
AU60NFIERA (G)
φ19.05
φ9.52
d. Copper pipe selection:
Hardness
Softness (TP2M)
Outer diameter
φ6.35
φ9.52
φ12.7
φ15.88
φ19.05
Min. thickness
0.8
0.8
1.0
1.0
1.1
Hardness
Hardness (TP2Y)
Outer diameter
φ19.05
φ22.2
φ25.4
φ28.58
φ31.8
φ34.9
φ38.1
φ41.3
Min. thickness
1.0
1.0
1.0
1.0
1.1
1.3
1.4
1.5