1. Seamless steel pipe for structure: GB8162-2008
2. Ground seam steel pipe for conveying fluid: GB8163-2008
3. Seamless steel pipe for boiler: GB3087-2008
4. High-pressure seamless pipe for boiler: GB5310-2008 (ST45.8-Ⅲ type)
5. High-pressure seamless steel pipe for fertilizer equipment: GB6479-2000
6. Seamless steel pipe for geological drilling: YB235-70
7. Seamless steel pipe for oil drilling: YB528-65
8. Seamless steel pipe for petroleum cracking: GB9948-2006
9. Special seamless pipe for oil drill collar: YB691-70
10. Seamless steel pipe for automobile half shaft: GB3088-1999
11. Seamless steel pipe for ships: GB5312-1999
12. Cold-drawn cold-rolled precision seamless steel pipe: GB3639-1999
13. Various alloy tubes 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo
GB3093-1986 (High-pressure seamless steel pipe for diesel engine),
GB/T3639-1983 (cold drawn or cold rolled precision seamless steel tube),
GB/T3094-1986 (cold drawn seamless steel pipe special-shaped steel pipe),
GB/T8713-1988 (Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinders),
GB13296-2007 (Stainless steel seamless steel tubes for boilers and heat exchangers),
GB/T14975-2002 (Stainless steel seamless steel pipe for structure),
GB/T14976-2002 (Stainless steel seamless steel pipe for fluid transportation),
GB/T5035-1993 (Seamless steel pipes for automobile axle sleeves),
API SPEC5CT-1999 (Casing and Tubing Specification) etc. Cold drawn (rolled) structural tube: round tube blank → heating → piercing → heading → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → billet tube → heat treatment → straightening → water Compression test (flaw detection) → mark → warehousing.
