... 2-80Temperature-resistantseamless steel pipefar high-pressure boilerSeamless pipes for petroleum 20, 12CrMo,15CrMo, Cr5Mo, Cr9Mo GB9948-8810 ... pipe10,20GB3087-199910-530*2-40Over-heat pipe for low and medium pressure boiler,boilling water pipe, ... :Transparent oil or black painting anti-corrosion or 3PEApplication:Natural gas, petroleum, chemical industry, electric power, metallurgy thermodynamic ...