... SA335 A335P22A335P5A335P9A335P91stainless steel pipe Applies to oil, aviation, metallurgy, food, water conservancy,electric power, chemical industry,Chemical, chemical fiber, pharmaceutical machinery ... natural gas industry in order to transmit the he oxygen,water and oilAPI 5LA,B,X42,X46,X52,X56,X60,X65 ... pipeApply to low voltage liquid transportationSY/T5037-2000A53A333 GR6 Pipe Reducer