API 5L Line Pipes Wall Thickness Outside Diameter Tolerance
Table 1 --- Tolerances for diameter and out-of-roundness
Specified
outside diameter
D
mm (in)
|
Diameter tolerances
mm (in) |
Out-of-roundness tolerances
mm (in) |
|
| Pipe except the end a |
Pipe end a, b, c |
Pipe except the end a |
Pipe end a, b, c |
| SMLS pipe |
Welded pipe |
SMLS pipe |
Welded pipe |
| < 60,3 (2.375) |
- 0,8 (0.031) to + 0,4 (0.016) |
|
d |
≥ 60,3 (2.375)
to
≤ 168,3 (6.625) |
± 0,007 5 D
|
- 0,4 (o.o16) to + 1,6 (0.063) |
0,020 D |
0,015 D |
>168,3 (6.625)
to
≤ 610 (24.000) |
± 0,007 5 D |
± 0,007 5 D
but.maximum
of + 3,2 (0.125) |
± 0,005 D,
but maximum of ± 1,6 (0.063) |
> 610 (24.000)
to
≤ 1 422 (56.000)
|
± 0,01 D |
± 0,005 D,
but.maximum
of + 4,0 (0.160) |
± 2,0 (0.079) |
±1,6 (0.063) |
0,015 D
but maximum of 15 (0.6),
for d / t ≤ 75 |
0,01 D,
but maximum of 13 (0.5).
for d / t ≤ 75 |
by agreement
for d / t > 75 |
by agreement
for d / t > 75 |
| > 1 422 (56 000) |
as agreed |
a The pipe end includes a length of 100 mm (4.0 in) at each of the pipe extremities.
b For SMLS pipe, the tolerances apply for t ≤ 25.0 mm (0.984 in). and the tolerances for thicker pipe shall be as agreed.
c For pipe with D ≥ 219,1 mm (8.625 in), the diameter tolerance and the out-of-roundness tolerance may be determined using the calculated inside diameter (the specified outside diameter minus two times the specified wall thickness) or measured inside diameter rather than the specified outside diameter.(see 10.2.8.3.)
d lncluded in the diameter tolerance.
Table 2 --- Tolerances for wall thickness
Wall thickness
t
mm (in) |
Tolerances a
mm (in) |
| Seamless pipe b |
| ≤ 4,0 ( 0.157) |
+ 0,6 (0.024)
- 0,5 (0.020) |
| > 4,0 ( 0.157) to <25,0 (0.984) |
+ 0,150
- 0,125 |
| ≥ 25,0 (0.984) |
+3,7 (0.146) or + 0,1 t, whichever is the greater
- 3,0 (0.120) or - 0,1 t, whichever is the greater |
| Welded pipe c, d |
| ≤ 5,0 (0.197) |
± 0,5 (0.020) |
| > 5,0 (0.197) to <15,0 (0.591) |
± 0,1 t |
| ≥ 15,0 (0.591) |
±1,5 (0.060) |
a if the purchase order specifief a minus tolerance for wall thickness smaller than the applicable value given in this table, the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
b for pipe with D ≥ 355,6 mm (14.000 in) and t ≥ 25,0 mm (0.984 in) the wall-thickness tolerance locally may exceed the plus tolerance for wall thickness by an additional 0,05 t, provided that the plus tolerance for mass (see 9.14) is not exceeded.
c The plus tolerance for wall thickness does not apply to the weld area.
d See 9.13.2 for additional restrictions.
Related References:
API 5CT. Tubing
API 5L. Line Pipes
OCTG API 5L ASTM Line Pipes Specification
Chemical Composition for API 5L PSL 1 Pipes
Chemical Composition for API 5L PSL 2 Pipes
API 5L PSL 1 Pipe Mechanical Properties Tensile Strength
API 5L PSL 2 Pipe Mechanical Properties Tensile Strength
API 5L PSL 2 Pipes Impact Test Table
API 5L Steel Number Steel Designation Equivalent Table ISO 3138 EN 10027-2 |
