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.
