Stainless steel pipes specifications and the appearance of quality:

A. According to GB14975-94 "stainless steel seamless pipe," provides that the length of pipe is usually (not length) hot-rolled steel 1.5 ~ 10m, hot extruded pipe is equal to and greater than 1m. Cold drawn (rolled) pipe wall thickness 0.5 ~ 1.0mm were, 1.0 ~ 7m; wall thickness greater than 1.0mm were, 1.5 ~ 8m.

B. Hot (hot extrusion) and the diameter 54 ~ 480mm total of 45 species; wall thickness 4.5 ~ 45mm total of 36 species. Cold drawn (rolled) and the diameter 6 ~ 200mm total of 65 species; wall thickness of 0.5 ~ 21mm total of 39 species.