GB/T 12716-2002
Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads (English Version)
- Standard No.
- GB/T 12716-2002
- Language
- Chinese, Available in English version
- Release Date
- 2002
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2012-10
- Replace By
- GB/T 12716-2011
- Latest
- GB/T 12716-2011
- Scope
- This standard specifies the tooth profile, basic dimensions, tolerances and markings of pipe threads (NPT and NPSC) with a thread angle of 60° and the thread pair itself has sealing properties. There are two kinds of internal threads, conical internal thread and cylindrical internal thread, and only one type of external thread, conical external thread. Internal and external threads can form two types of sealing fit: conical internal thread and conical external thread form a "cone/cone" fit, and cylindrical internal thread and conical external thread form a "column/cone" fit. This standard is applicable to the sealing thread connection of pipes, valves, pipe joints, cocks and other pipeline accessories. In order to ensure the reliability of the thread connection seal, a suitable sealing medium should be added to the thread pair, such as wrapping tape on the thread surface, applying sealant, etc.
GB/T 12716-2002 history
- 2011 GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads
- 2002 GB/T 12716-2002 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads
