... product comply with the standard of SY/T5037-2000, GB/T3091 and API SPEC 5L, the material can be ... will get the most competitive price from us here. StandardJIS, GB, DIN, ASTM, APIStandardJIS G3455-2005, JIS G3452-2004, JIS ... G3456-2004, JIS G3457-2005, GB/T 9711.1-1997, DIN 1626, DIN 1629/3, ... , St52.4, Q235, Q345Thickness6mm--28mmOuter Diameter219mm - 3500mm API 5L SAW STEEL PIPE