Petroleum Pipe:[Material]:J55,K55,GRADEA,GRADEB,X42,X46,X52,X56,X60,X65,X70,X80,20#,35#,45,20G,12Gr1MoV ,16Mn,15GrMo,27SiMn,10CrMo910,DZ50,P11,P12,P22,P91,Cr5Mo,12Cr1MoVG and so on; [Thickness]:2-30mm;[Diameter]:10-720mm.
Products: petroleum engineering courses,
institute of petroleum