Both NPT and BSP are pipe thread standards for screw threads used on pipes and pipe fittings to seal pipes. Both threads have the same pitch and the familiar shaped peaks and valleys. In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees and the BSP angle is 55 degrees.
How do I know if I have BSP or NPT?
The way to tell the difference between the two is the flank angle. The flank angle for NPT is 60° compared to the BSP tapered which is 55° (this can be verified with a thread gauge). BSP threads are measured in imperial measurements such as 1/8, 1/4, 1/2, 3/4 etc.
How do you identify BSP fittings?
How to Measure Your BSP Fittings
- Measure the outer diameter (OD) of the thread (in inches)
- Then subtract 25% from this (¼ inch)
- You’ll then need to make sure it is a BSP fitting so by counting the threads on your coupling, perhaps only just over ¼”, you can just multiply this by four to find the threads per inch.
Is “BSP” BSPP or BSPT?
1) British Standard Pipe Parallel (BSPP) British Pipe Standard fittings are among the most popular of all foreign threads. These threads come in 2 versions: parallel (BSPP), and tapered (BSPT). The thread flank angle for both tapered and parallel British threads is 55°. NOTE: It is a common mistake to identify a BSPT (tapered) as an NPT.
What is British Standard Pipe?
British Standard Pipe. Jump to navigation Jump to search. British Standard Pipe (BSP) is a family 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.
What are pipe fittings?
Pipe fitting or pipefitting is the occupation of installing or repairing piping or tubing systems that convey liquid, gas, and occasionally solid materials.
