1.alloy steel pipe standard GB,DIN ,ASTM ASME ,JIS 2.8-1240 1-200 3. material:all kinds of alloy 4.,massive stock alloy steel pipe applies to petroleum,chemical industry ,electric power,boiler with its metits of high temperature resistant ,low temperature resistant ,corrosion resistant,the products can be made according to the custom requirements delivery fast ,quality guaranteed ,competitive ...