U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
(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 (
| 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 (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.”
