British Standard Pipe (BSP) is a set of technical standards for screw threads that has been adopted internationally for interconnecting and sealing pipes and fittings by mating an external (male) thread with an internal (female) thread.

BSPT & BSPP Male and Female Fittings. British Standard Pipe threads are similar in function to NPT threads, but are generally not interchangeable. BSPT male threads seal against threads of fixed BSPT female. Contact is made on the flanks of the threads. Use of a thread sealant is recommended for BSPT male to BSPT female connections.

We offer adapters to both male BSPT adapters and female BSPT adapters. BSPP (British Standard Parallel Pipe) is most popular in the UK, Europe, Asia, Australia, New Zealand and South Africa. It is a parallel thread fitting that uses a bonded ring seal to do the sealing.

Aug 20, 2024 · BSP and NPT threads are incompatible, as they have different numbers of threads per inch and thread angles. Attempting to join an NPT male to a BSPP or BSPT female will cause the joint to get stuck within a few turns. As a result, a spiral leak will occur because of the difference in thread shape.

The BSP to mm conversion chart below shows metric and imperial dimensions for male threads and the number of threads per inch (TPI) : The information here is provided for guidance only. The data shown represents extracts interpreted by us of the referenced standards.

BSP threads are commonly used worldwide in water supply, cooling, pneumatics, and hydraulic systems. BSPP threads, specifically, are used on hose ends, adapters, ports, and other high-pressure applications.

Apr 18, 2022 · The main difference between NPT and BSP threads is that the thread angle in NPT threads is 60 degrees while that of BSP pipes is 55 degrees. NPT threads are also pointed at the crests and roots whereas BSP’s are rounded.

British Standard Pipe Parallel Thread (BSPP) has been adopted internationally as a standard scale used in plumbing fittings, and it is defined by BS EN 10226-1 and ISO 7-1, or ISO 228-1 (GB/T 7306.1, GB/T 7307). BSPP thread has Whitworth thread form (rounded peaks and valleys) with thread angle 55°.

Dec 27, 2022 · There are two types of BSP threads: BSPP: Both the male and female threads are parallel. BSPP connections are widely used in the UK, Europe, Asia, Australia, New Zealand, and South Africa. Table 1 shows the dimensions of the BSPP standard. BSPT: The male threads are tapered, and the female threads are commonly parallel. BSPT connections are ...

Oct 9, 2023 · When it comes to BSPP pressure gauges, they have longer male threads. A copper crush washer is used, which gets compressed between the bottom of the male and female fittings, creating a pressure-tight seal. One of the advantages of BSPP is that you don’t need any thread sealant to achieve a seal.