This standard is issued under the fixed designation A 671; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( ュ) indicates an editorial change since the last revision or reapproval.
1.Scope
1.1 This specification2 covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitable for high-pressure service at atmospheric and lower temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.
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 Table 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):
|
Class |
Heat Treatment on Pipe Section see: |
Radiography,
see Section |
Pressure
Test, see : |
|
10 |
none |
none |
none |
|
11 |
none |
9 |
none |
|
12 |
none |
9 |
8.3 |
|
13 |
none |
none |
8.3 |
|
21 |
stress relieved, see 6.3.1 |
none |
none |
|
21 |
stress relieved, see 6.3.1 |
9 |
none |
|
22 |
stress relieved, see 6.3.1 |
9 |
8.3 |
|
23 |
stress relieved, see 6.3.1 |
none |
8.3 |
|
31 |
normalized, see 6.3.2 |
none |
none |
|
31 |
normalized, see 6.3.2 |
9 |
none |
|
32 |
normalized, see 6.3.2 |
9 |
8.3 |
|
33 |
normalized, see 6.3.2 |
none |
8.3 |
|
40 |
normalized and tempered, see 6.3.3 |
none |
none |
|
43 |
normalized and tempered, see 6.3.3 |
9 |
none |
|
43 |
normalized and tempered, see 6.3.3 |
9 |
8.3 |
|
43 |
normalized and tempered, see 6.3.3 |
none |
8.3 |
|
50 |
quenched and tempered, see 6.3.4 |
none |
none |
|
51 |
quenched and tempered, see 6.3.4 |
9 |
none |
|
52 |
quenched and tempered, see 6.3.4 |
9 |
8.3 |
|
53 |
quenched and tempered, see 6.3.4 |
none |
8.3 |
|
60 |
normalized and precipitation heat none none treated |
none |
none |
|
61 |
normalized and precipitation heat none none treated |
9 |
none |
|
62 |
normalized and precipitation heat none none treated |
9 |
8.3 |
|
63 |
normalized and precipitation heat none none treated |
none |
8.3 |
|
70 |
normalized and precipitation heat none none treated |
none |
none |
|
71 |
normalized and precipitation heat none none treated |
9 |
none |
|
72 |
normalized and precipitation heat none none treated |
9 |
8.3 |
|
73 |
normalized and precipitation heat none none treated |
none |
8.3 |
NOTEΑSelection 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.
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1This specification is under the jurisiction of ASTM Committee A-1 on Steel, Stainless Steel, and Prlated Alloys and is the direct responsibility of Subcommittee A01.09 on Pipe.
Current edition approved July 15, 1993. Published September 1993. Originally published as A671 - 72. Last previous edition A671-89a.
2For ASME Boiler and Pressure Vessel Code applications see related Specification SA-671 in Section II of that Code.
