What is the difference between BSPP and BSPT female?

Jan. 10, 2024

BSPP (British Standard Pipe Parallel) and BSPT (British Standard Pipe Taper) are threads used primarily in the United Kingdom and other countries that follow the British standard for pipe fittings. While both are types of British standard pipe threads, they have distinct characteristics and applications:

BSPP vs BSPT.jpg

BSPP vs BSPT Features

● BSPP (British Standard Pipe Parallel):

Parallel Threads: The threads on a BSPP fitting are straight and run parallel to each other.

Sealing Mechanism: BSPP fittings use an external sealing mechanism, such as an O-ring or a washer, to create a seal. This means that the threads themselves do not provide the sealing action.

Gasket Seal: Typically, a gasket seals between the male and female threads.

● BSPT (British Standard Pipe Taper):

Tapered Threads: The threads on a BSPT fitting are tapered, meaning they get narrower towards the end of the fitting.

Sealing Mechanism: BSPT fittings rely on the taper of the threads to create a seal. As the male and female threads are tightened together, the taper causes them to wedge against each other, creating a seal.

Sealant: A sealant or thread tape is often applied to the threads to ensure a tight seal. Common sealants include PTFE tape or liquid thread sealant.

BSPP vs BSPT Different application scenarios

● BSPP Applications: 

BSPP fittings, such as hydraulic systems, are commonly used in applications requiring a high-pressure seal.

● BSPT Applications: 

BSPT fittings are commonly used in low-pressure applications, such as water and gas plumbing systems.

The main difference between BSPP and BSPT threads is their thread design and sealing mechanisms. BSPP threads are parallel and rely on an external sealing mechanism, while BSPT threads are tapered and create a seal through the threads' taper.

The above lists the size information of some malleable pipe fittings for you, hoping to bring you new knowledge. Of course, this is only a small part of it. Jianzhi Group also produces more different types of malleable pipe fittings. You can click the link below to enter the official YOUTUBE channel of Jianzhi Group for more product information. In addition, you are welcome to consult us directly.



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