Seamless pipe plant galvanized OD:6-1000mm WT:1-1200mm Grade:GB,ASTM,SGS,CE Type: ... Seamless.welded,hot rolled,cold drawn,ERW Seamless pipe plant galvanizedStandard: ... JIS, AISI, ASTM, GB, DIN, ENPlace of Origin: TIANJIN ... cold drawn and cold rolled3.Standards:ASTM / ASME, GB, DIN, JIS, T14975, etc.4.Out Diameter: ...