Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes We Tianjin Fajiu Metal Materials Co., Ltd , specilizes in trading and exporting kinds of steel pipes.We have export to many countries such as America, Egypt,Singapore,India and so on.We can supply kinds of pipes:1)Carbon steel pipes: GB8163/1999 20#, ASTM A106 GrB, ASTM A53 GrB,DIN17175 ST 45.82)Alloy ...