... pressure boiler tube20G50004lower/medium-pressure boiler tube10#,20#,A,B60005Transmission fluid tube10#,20#,Q295,Q345,Q390300006Structural use of seamless steel tubes10 ... 1,C90,T95,P110,Q125,9Cr,13Cr2100003Line pipeB,X42~X80200004Transmission fluid tube10,20,Q295,Q345350005high-pressure boiler tube20G,20MnG,25MnG,12Cr1MoVG ... use of tube320,360,410,4609000 Total 450000 transmission fluid tube