... 4.SGS inspection 5.Mill supply 1.Commodity NameSpiral steel pipe2.StandardSY/T5037,SY/T5040,ASTMA252,EN10217,EN10219,GB ... /T9711.1,API 5L3.Outer Diameter219.1—3600 mm4.Wall Thickness6mm—30 mm 5 ... and natural gas , water and gas, mineral slurry. Also for chemical industry, building structure and pile driving, etc.12. ... ,PSL2 , API 5CT, ISO ,CE ASTM A252 SSAW Steel Pipe Pile