... 2.Application: Structure Pipe 3.Standard: ASME, ANSI, ASTM 4.Section Shape: Round seamless carton steel pipespecificaton:standard:ASTM ,ASME ,DIN ... , USE:Petroleum,chemical,power,gas,metallurgy,shipbuilding,constructio,etc. ISO 9001CERTIFICATE. BUTT WELDED FITTING: Production acc. to the standard of ...