GB/T 1231-1991
Specifications of high strength bolts with large hexagon head, large hexagon nuts,plain washers for steel structures (English Version)
- Standard No.
- GB/T 1231-1991
- Language
- Chinese, Available in English version
- Release Date
- 1991
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2006-11
- Replace By
- GB/T 1231-2006
- Latest
- GB/T 1231-2006
- Scope
- This standard specifies the technical requirements, test methods, inspection rules, marking and packaging of high-strength large hexagon head bolts, large hexagon nuts, washers and connecting pairs for steel structures. This standard applies to railway and highway bridges, boiler steel structures, industrial plants, high-rise civil buildings, tower mast structures, hoisting machinery and other steel structures with friction-type high-strength bolt connections.
GB/T 1231-1991 history
- 2006 GB/T 1231-2006 Specifications of high strength bolts with large hexagon head ，large hexagon nuts，plain washers for steel structures
- 1991 GB/T 1231-1991 Specifications of high strength bolts with large hexagon head, large hexagon nuts,plain washers for steel structures
