... as water, gas, and oil.piling, etc.ProcessSprial Submerged-Arc Welded TypeSAWStandardAPI 5L,API 5CT,ASTM A53,ASTM A252,EN10217 ... ,EN10219,DIN,JIS,BSCertificateAPI 5L ISO CE Our diameter219. ... Tar Epoxy,3PE,FBE,Varnish coating,Bitumen coating,Black Oil coating as per customers requirementTestChemical Component Analysis,Mechanical Properties ...