Material Selection – Common Specifications for Carbon Steel Systems

As can be seen from the Table, material selection can be made from available national standards such as ASTM and API.

Material Selection – Common Specifications for Carbon Steel Systems

Commodity	B31.1	B31.3	B31.4
Pipe	ASTM A 106	ASTM A 53 API 5L	ASTM A 53 API 5L API 5LU
Pipe – Low Temp	ASTM A 333 Gr.6	ASTM A 333 Gr.6	ASTM A 333 Gr.6
Pipe – High Temp	ASTM A 106	ASTM A 106	ASTM A 106
Bolting	ASTM A 193 B7	ASTM A 193 B7 ASTM A 320	ASTM A 193 B7 ASTM A 320
Nut	ASTM A 194 2H	ASTM A 194 2H	ASTM A 194 2H
Fittings	ASTM A 234 WPB	ASTM A 234 WPB
Fittings – Low Temp	ASTM A 420 WPL6	ASTM A 420 WPL6	ASTM A 420 WPL6
Fittings – High Temp	ASTM A 234 WPB ASTM A 216 WCB	ASTM A 234 WPB ASTM A 216 WCB	ASTM A 234 WPB
Flanges	ASTM A 105 ASTM A 181 ASME B16.5	ASTM A 105 ASTM A 181 ASME B16.5	ASTM A 105 ASTM A 181 ASME B16.5
Flanges – Low Temp	ASTM A 350 LF2 ASTM A 352 LCB	ASTM A 350 LF2 ASTM A 352 LCB	ASTM A 350 LF2
Flanges – High Temp	ASTM A 105 ASTM A 181 ASTM A 216 WCB	ASTM A 105 ASTM A 181 ASTM A 216 WCB	ASTM A 105 ASTM A 216 WCB
Valves	ASTM A 105 ASME B16.34	ASTM A 105  API 600	API 6D API 600
Valves – Low Temp	ASTM A 350 LF2 ASTM A 352 LCB	ASTM A 350 LF2 ASTM A 352 LCB
Valves – High Temp	ASTM A 216 WCB	ASTM A 216 WCB