| Specified outside diameter D mm (in) of API 5L Pipes | Diameter tolerances Milimeter (in) | Out-of-roundness tolerances Milimeter (in) | ||||
| Pipe except at end a | Pipe end a,b,c | Pipe except at 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) | – 0.4 (0.016) to + 1.6 (0.063) | d | |||
| ≥ 60.3 (2.375) to ≤ 168.3 (6.625) | ± 0.007 5 D | 0.020 D | 0.015 D | |||
| ≥ 168.3 (6.625) to ≤ 610 (24.00) | ± 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 (56.00) | ± 0.01 D | ± 0.005 D, but maximum of + 4.0 (0.160) | ± 2.0 (0.079) | ± 1.6 (0.063) | 0.015 D | 0.01 D, |
| but maximum of 15 (0.6), | but maximum of 13 (0.5), | |||||
| for d / ts ≤ 75 | for d / ts ≤ 75 | |||||
| by agreement | by agreement | |||||
| for d / ts > 75 | for d / ts > 75 | |||||
| > 1 422 (56 000) | as agreed | |||||
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