... ,XXS Standard: ASTM,DIN,BS,ANSI,JIS,EN DIN 2458 carbon steel welded pipe with good quality :High quality,low price,multi-standardCertificate ... ,ERW,Hot Rolled,SAW.and so on.Structure type: seamless pipe,straight steel pipe,square pipe,spiral pipe ,and so on.Deaign and manufacture std: DIN carbon steel ...