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 ... BASTM A106 ASTM A5310Casing and TubingJ55,K55,N80,L80,T95,P110,Q125(PSL1)API 5CT11Line pipeB, ... varieties include: Low/medium pressure boiler pipe, high pressure boiler pipe, alloy pipe, marine pipe, hollow sucker rod, oil cracking ...