| Standard | Outer diameter wall thickness deviation | |||
| definition | Outside diameter tolerance | Wall thickness tolerance | Weight deviation | |
| ASTM A53 | Uncoated and hot-dip galvanized welded and seamless nominal steel pipe | For nominal tubes less than or equal to NPS 1 1/2(DN40), the diameter of any place shall not be greater than the standard value of 1/64 in(0.4mm), for nominal tubes greater than or equal to NPS2(DN50), the outer diameter shall not exceed the standard value of ±1% | The minimum wall thickness in any place shall not be more than 12.5% thicker than the specified nominal wall thickness. The checked minimum wall thickness shall meet the requirements in Table X2.4 | The weight of the nominal pipe specified in Tables X2.2 and X2.3, or the weight calculated according to the relevant formula in ASME B36.10M, shall not be deviated by more than ±10% |
| ASTM A106 | High temperature seamless carbon steel nominal pipe | 1/8-1 1/2 ±0.4mm, ＞1 1/2-4 ±0.79mm ＞4-8 ﹢1.59mm -0.79mm ＞8-18 ﹢2.38mm -0.79mm ＞18-26 ﹢3.18mm -0.79mm ＞26-34 ﹢3.79mm ﹣0.79mm ＞34-48 +4.76mm -0.79mm | The minimum wall thickness in any place shall not exceed 12.5% of the specified engineering wall thickness | The weight of any steel pipe shall not exceed 10% or more than the prescribed weight, nor shall it be less than 3.5% or more. Unless otherwise agreed by the supplier and Xu Fang, steel pipes with NPS of 4 and smaller can be properly weighed in batches |
| API 5L | Pipeline pipe (oil and gas industry - steel pipe for pipeline transportation systems |  |
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Post time: Feb-13-2025
