What is the difference between BSP and NPT threaded ?
time2024/05/27
- BSP (British Standard Pipe) threads and NPT (National Pipe Thread) threads are two common standards used in various applications to connect pipes and fittings. The main differences between them are as follows:
BSP (British Standard Pipe) threads and NPT (National Pipe Thread) threads are two common standards used in various applications to connect pipes and fittings. The main differences between them are as follows:
Thread Angle
BSP: The thread angle is 55 degrees.
NPT: The thread angle is 60 degrees.
Thread Types
BSP: Includes two types: BSPT (British Standard Pipe Tapered) and BSPP (British Standard Pipe Parallel).
BSPT: Tapered threads, used for connections requiring sealing.
BSPP: Parallel threads, typically used with O-rings or washers to achieve a seal.
NPT: Primarily tapered threads, designed for self-sealing connections.
Sealing Method
BSPT and NPT: Both have tapered threads, which achieve sealing through interference fit between the threads.
BSPP: Since it has parallel threads, sealing usually requires the use of washers or O-rings.
Application Areas
BSP: Mainly used in the UK, Europe, and some Commonwealth countries.
NPT: Mainly used in the United States and Canada.
Installation and Removal
BSPT and NPT: Tapered threads can create a seal when tightened, but care must be taken to avoid over-tightening, which can damage the threads.
BSPP: Parallel threads are relatively easy to install but require appropriate sealing components to prevent leaks.
Youfa producing BSPT threaded galvanized steel pipes and NPT threaded galvanized steel pipes. It is usually both pipe ends threaded with caps; or one pipe end threaded with cap and other pipe end threaded with coupling.
Besides, Youfa has beveled ends steel pipe and grooved ends steel pipe, flanged ends, etc.