Alloy Pipe,Pipe for chemical fertilizer facility ,Marine Pipe,Casing Pipe,Drill Pipe,Oil Pipe,Structure Pipe ,Pipe of Pipelines Code NO.VarietyNormal Steel GradeStandard ... prop Tube20,35,45,27SiMnGB/T173969American Standard PipeA,BASTM A106 ASTM A5310Casing and TubingJ55,K55,N80,L80,T95,P110, ... .And we also have a large stock/warehouse with 80,000mt all kinds of seamless pipes (approx. 4000 sorts ...