... ,Corrosion resistanceASTM SA335 A335P22A335P5A335P9A335P91stainless steel pipe Applies to oil, aviation, metallurgy, food, water conservancy,electric power, chemical industry ... are seamless steel tubeASTM A106ASTM A53A53 BA106 Bsteel pipe for structureUsed in general structure, engineering scaffolds, mechanicalASTM ... industry in order to transmit the he oxygen,water and oilAPI 5LA,B,X42,X46,X52,X56 ...