(a) The longitudinal joint factor to be used in the design formula in section 255.105 of this Part is determined in accordance with the following table:
Specification* |
Pipe Class |
Longitudinal |
ASTM A 53/A 53M |
Seamless |
1.00 |
|
Electric resistance welded |
1.00 |
|
Furnace butt welded |
.60 |
ASTM A 106 |
Seamless |
1.00 |
ASTM A 211 |
Spiral welded steel pipe |
.80 |
ASTM A 333 |
Seamless |
1.00 |
|
Electric resistance welded |
1.00 |
ASTM A 381 |
Double submerged arc welded |
1.00 |
ASTM A 671 |
Electric fusion welded |
1.00 |
ASTM A 672 |
Electric fusion welded |
1.00 |
ASTM A 691 |
Electric fusion welded |
1.00 |
API Spec 5 L |
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 |
|
Pipe 4 inches (102 millimeters) or less |
.60 |
* As described in Section 10.3 of this Title.
(b) If the type of longitudinal joint cannot be determined, the joint factor to be used must not exceed that designated for Other.