Weld Pipe 1.Standard:BS,ASTM,GB/T,API,ISOR65 2.Material: ... .W.T:1.0-16.3mm Weld PipeMain use:Scaffolding pipe, Structure pipe, Fence/Door pipe, Furniture, Lowpressure fluid pipe for water oil or gas ... , Boiler pipe TypeERW steel pipeWT1.0-16.3mmStandard ...