... 14-630*2-80Temperature-resistantseamless steel pipefar high-pressure boilerSeamless pipes for petroleum 20, 12CrMo,15CrMo, Cr5Mo, Cr9Mo GB9948-8810 ... -530*1.5-36Boiler pipes for refinery,heatexchangeing pipes,seamless steel pipes for pipelineHigh-pressureSeamless pipes for fertilizer making equipment20, 16Mn, ... FORWARD TO RECEIVE YOUR ENQUIRY SOON.APPLICATION: Carbon steel pipes seam welded