... furnace tubes,heatexchanger tube and pipesLow-medium pressure boiler pipe 10#,20#,16MnGB3087-20088-1240OD*1 ... structure low-medium pressure boiler and locomotive boilerTransmission fluid tube 10#,20#,ASTM A106A,B,C,A53A,B 16Mn10#,20#,45#,27SiMnASTM A53A,B16MnGB ...