BSP vs BSPP

BSP (British Standard Pipe Taper):

• Also known as BSPT (British Standard Pipe Taper)
• BSP taper threads have a 55-degree thread angle
• The diameter of the threads gradually increases along the length of the fitting
• The tapering design allows for a tight and secure seal when the male and female threads are screwed together
• Typically used in applications where a seal is essential, such as in fluid-carrying pipes

BSPP (British Standard Parallel Pipe):

• Also known as G or Rp (parallel) threads
• BSPP threads have a 55-degree thread angle as well, but the threads maintain a constant diameter along the length of the fitting
• Unlike BSP taper threads, BSPP threads do not create a sealing effect through tapering
• BSPP fittings usually require the use of an additional sealing method, such as an O-ring or a washer, to prevent leaks
• Commonly used in applications where a tight seal is not as critical, or where a separate sealing method is employed

In summary, the key distinction is that BSP (taper) relies on the tapering of threads to create a seal, while BSPP (parallel) requires an additional sealing element due to the constant diameter of the threads. The choice between BSP and BSPP depends on the specific requirements of the application and the desired sealing characteristics.

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