... pipe/welded tube.1.API 5L spiral steel pipe1)Standards: SY/T5037-2001 GB/T9711.1 API 5L ASTM DIN2)Material ... .0351741317.5-24 SAW/SSAW Spiral Welded Steel PipeQUALITY STANDARD1>SY/T 5040 Spiral submerged arc-welded steel pipe piles2>CJ ... supplySteel Grade1>GB/T 13793, GB/T 6728, GB 15831, SY/T 5040,CJ/T 3022Q195, Q215, Q235, Q275, Q295, Q345 ...