ASTM A691/A691M-18a
$30.00
Standard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures
1.1This specification2 covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures. Heat treatment may or may not be required to attain the desired mechanical properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.
1.2The specification nominally covers pipe 16 in. [400 mm] in outside diameter and larger with wall thicknesses up to 3 in. [75 mm] inclusive. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.
1.3Several grades and classes of pipe are provided.
1.3.1Gradedesignates the type of plate used as listed in Table 1.
1.3.2Classdesignates the type of heat treatment performed in the manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed in 1.3.3.
1.3.3Class designations are as follows (Note 1):
|
Class |
Heat Treatment on Pipe |
Radiography, see Section |
Pressure Test, see Section |
|
10 |
none |
none |
none |
|
11 |
none |
9 |
none |
|
12 |
none |
9 |
8.3 |
|
13 |
none |
none |
8.3 |
|
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 |
|
