... OD:219-3600mm,WT:6-30mm 2.Standard:API 5L PSL1,GB/T9711.1 3.Material:X42 ... ,SY/T5040,ASTMA252,EN10217,EN10219,GB/T9711.1,API 5L3.Outer Diameter219.1—3600 mm4.Wall Thickness6mm ... natural gas , water and gas, mineral slurry. Also for chemical industry, building structure and pile driving, etc.12 ... , England, Belgium, etc13.CertificatesAPI 5L PSL1,PSL2 , API 5CT, ISO ,CE API 5L PSL2 Spiral Seam Steel Pipe