ASTM International - ASTM A671-96(2001)
Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
|Publication Date:||10 October 1996|
|ICS Code (Iron and steel pipes):||23.040.10|
1.1 This specification covers electric-fusion-weld
1.2 The specification nominally covers pipe 16 in. (405 mm) in outside diameter or larger and of 1/ 4 in. (6.4 mm) wall thickness or greater. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.
1.3 Several grades and classes of pipe are provided.
1.3.1 Grade designates the type of plate used as listed in 5.1.
1.3.2 Class designates the type of heat treatment performed during manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed in 1.3.3.
1.3.3 Class designations are as follows (Note 1):
|Class||Heat Treatment on Pipe||Radiography, see Section||Pressure Test, see:|
|20||stress relieved, see 5.3.1||none||none|
|21||stress relieved, see 5.3.1||9||none|
|22||stress relieved, see 5.3.1||9||8.3|
|23||stress relieved, see 5.3.1||none||8.3|
|30||normalized, see 5.3.2||none||none|
|31||normalized, see 5.3.2||9||none|
|32||normalized, see 5.3.2||9||8.3|
|33||normalized, see 5.3.2||none||8.3|
|40||normalized and tempered, see 5.3.3||none||none|
|41||normalized and tempered, see 5.3.3||9||none|
|42||normalized and tempered, see 5.3.3||9||8.3|
|43||normalized and tempered, see 5.3.3||none||8.3|
|50||quenched and tempered, see 5.3.4||none||none|
|51||quenched and tempered, see 5.3.4||9||none|
|52||quenched and tempered, see 5.3.4||9||8.3|
|53||quenched and tempered, see 5.3.4||none||8.3|
|60||normalized and precipitation heat treated||none||none|
|61||normalized and precipitation heat treated||9||none|
|62||normalized and precipitation heat treated||9||8.3|
|63||normalized and precipitation heat treated||none||8.3|
|70||quenched and precipitation heat treated||none||none|
|71||quenched and precipitation heat treated||9||none|
|72||quenched and precipitation heat treated||9||8.3|
|73||quenched and precipitation heat treated||none||8.3|
Note 1-Selection of materials should be made with attention to temperature of service. For such guidance, Specification A 20/A 20M may be consulted.
1.4 The values stated in inch-pound units are to be regarded as the standard.