(a) The longitudinal joint factor to be used in the design formula in § 192.105 is determined in accordance with the table 1 to this paragraph (a):
Table 1 to Paragraph (a)
| Specification | Pipe class | Longitudinal joint factor (E) |
| ASTM A53/A53M (incorporated by reference, see § 192.7) | Seamless | 1.00 |
| Electric resistance welded | 1.00 | |
| Furnace butt welded | .60 | |
| ASTM A106/A106M (incorporated by reference, see § 192.7) | Seamless | 1.00 |
| ASTM A333/A333M (incorporated by reference, see § 192.7) | Seamless | 1.00 |
| Electric resistance welded | 1.00 | |
| ASTM A381 (incorporated by reference, see § 192.7) | Double submerged arc welded | 1.00 |
| ASTM A671/A671M (incorporated by reference, see § 192.7) | Electric-fusion-welded | 1.00 |
| ASTM A672/A672M (incorporated by reference, see § 192.7) | Electric-fusion-welded | 1.00 |
| ASTM A691/A691M (incorporated by reference, see § 192.7) | Electric-fusion-welded | 1.00 |
| API Spec 5L (incorporated by reference, see § 192.7) | Seamless | 1.00 |
| Electric resistance welded | 1.00 | |
| Electric flash welded | 1.00 | |
| Submerged arc welded | 1.00 | |
| Furnace butt welded | .60 | |
| Other | Pipe over 4 inches (102 millimeters) | .80 |
| Other | Pipe 4 inches (102 millimeters) or less | .60 |
(b) If the type of longitudinal joint cannot be determined, the joint factor to be used must not exceed that designated for “Other.”
Source: Amdt. 192-135, 89 FR 33280, Apr. 29, 2024, as amended by Amdt. 192-156, 90 FR 40763, Aug. 21, 2025
Compiled from the Electronic Code of Federal Regulations (eCFR), an editorial compilation and not an official legal edition of the CFR. The official text is the Federal Register and the annual CFR edition. §192.113 on eCFR.