Submerged arc welding steel pipe standard and its classification

pressure fluid conveying with spiral submerged arc welding steel pipe (SY5036-83) is mainly used in oil and gas pipeline, high pressure fluid conveying with spiral weld high-frequency welded steel pipe (SY5038-83), high frequency welding spiral weld steel pipe (hf lap method) and spiral seam high frequency welded steel pipe (pressure transmission spiral weld).Pipe bearing capacity, good plasticity, easy to welding and processing.