... pipe heat exchanger pipelineASTM A333A333 GR6steel pipe forhigh-pressure boilerUsed in manufacturing by high pressure boiler tube,the collection box, steam pipe, ... ,X42,X46,X52,X56,X60,X65,X70,X80ERW STEEL PIPEUsed in general structure stents, low voltage liquid transportation, etcGB/T13793-1992GB3091- ... transportationSY/T5037-2000A53A333 GR6 Spiral steel pipe for low-pressure fluid transport service