... ,SGP,STD,XS,XXS Standard: ASTM,DIN,BS Material:ASTM A23 API anticorrosive steel pipe with good quality :anticorrosive pipeHigh quality,low price,multi-standardCertificate ... ,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 ...