GB/T 3091-2015 in English

《GB/T 3091-2015低压流体输送用焊接钢管》由TC183（全国钢标准化技术委员会）归口，TC183SC1（全国钢标准化技术委员会钢管分会）执行，主管部门为中国钢铁工业协会。
本标准规定了低压流体输送用焊接钢管的尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志及质量证明书。
本标准适用于水、空气、采暖蒸汽和燃气等低压流体输送用直缝电焊钢管、直缝埋弧焊(SAWL)钢管和螺旋缝埋弧焊(SAWH)钢管,并对它们的不同要求分别做了标注,未标注的同时适用于直缝高频电焊钢管、直缝埋弧焊钢管和螺旋缝埋弧焊钢管。

This standard specifies dimension, shape, weight, technical requirements, test methods, inspection rules, packing, marking and quality certificate of welded steel pipes for low pressure liquid delivery.
This standard is applicable to electric-welding longitudinal-seam steel pipe, submerged arc-welding longitudinal-seam (SAWL) steel pipe and submerged arc-welding helical-seam (SAWH) steel pipe for low pressure liquid delivery of water, air, heating steam, fuel gas, etc., and makes the labeling on respective requirements for them; non-labeled requirements are applicable to high-frequency electric-welding longitudinal-seam steel pipe, submerged arc-welding longitudinal-seam steel pipe and submerged arc-welding helical-seam steel pipe.

1 Scope
2 Normative References
3 Order Content
4 Dimension, Shape and Weight
4.1 Diameter and Wall Thickness
4.2 Length
4.3 Bending
4.4 Out-of-roundness
4.5 Pipe End
4.6 Weight
5 Technical Requirements
5.1 Designations and Chemical Compositions of Steels
5.2 Manufacturing Process
5.3 Delivery State
5.4 Mechanical Property
5.5 Technical Property
5.6 Hydraulic Test
5.7 Surface Quality
5.8 Steel Pipe Butting
5.9 Galvanized Zinc Coating
5.10 Other Requirements
6 Test Method
7 Inspection Rules
7.1 Inspection and Acceptance
7.2 Lot Grouping Rules
7.3 Sampling Quantity
7.4 Reinspection and Judgment Rules
8 Packing, Marking and Quality Certificate
8.1 Marking on Steel Pipes
8.2 Packing and Quality Certificate of Steel Pipes
Appendix A (Informative) Dimensions of Steel Pipes Whose Pipe Ends are Connected by Thread or Groove
Appendix B (Normative) Determination of Zinc Coating Weight - Antimonic Chloride Method
Appendix C (Normative) Adherence Test of Zinc Coating - Cupric Sulfate Immersion Method