Standard of seamless steel details

China's current standard of seamless steel:

A. The current standard of seamless steel pipe: A total of 47 of which: GB 25 HB the three special-purpose 19; the basis of two 45

Two. Commonly used standards: ① GB / T 2102-2006 Steel Pipe inspection, packaging, marking and quality certificate.

② GB / T 17395-1998 seamless steel pipe size, shape, weight and allowable deviation.

③ GB 5310-1995 for high pressure boiler seamless steel pipe.

The ④ GB 6479-2000 pressure chemical fertilizer equipment, seamless steel pipes.

⑤ GB / T 18248-2000 cylinders with seamless steel pipe.