... )ISO9001:2000 API Spiral Welded Pipe StandardBS, JIS, GB, DIN, ASTM, APIStandardBS 1387, JIS G3463-2006, JIS G3459-2004, JIS G3461 ... -2005, GB 3087-1999,...Grade10#-45#, 16Mn, A53-A369, Q195-Q345Grade20#, 16Mn, A53(A,B), A106(B,C), A312, Q235Thickness2 - 65 ...