Are BSP and NPT interchangeable?
NPT and BSP threads are generally not compatible due to the differences in their thread forms. NPT and BSP thread pitches (threads per inch, TPI) are listed below. You can use 1/2″ and 3/4″ NPT and BSP fittings together, but all others will be incompatible and will therefore leak.
What is BSP thread size?
British Standard Pipe Thread (BSPT)
| BSP Thread Size | Outside Diameter mm / inch | TPI |
|---|---|---|
| 5/8 Inch BSP | 22.99 mm / 0.902″ | 14 |
| 3/4 Inch BSP | 26.44 mm / 1.041″ | 14 |
| 7/8 Inch BSP | 30.20 mm / 1.189″ | 14 |
| 1 Inch BSP | 33.25 mm / 1.309″ | 11 |
What thread standard is used on a pipe?
NPT
NPT is defined by ANSI/ASME standard B1. 20.1. The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length ( 3⁄4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread.
How is pipe thread measured UK?
To find the thread size:
- 1) Measure the O.D (outer diameter) of the BSP thread.
- 2) Take the O.D measurement (in inches) and subtract 1/4 inch (. 25”).
- 1) Multiply 3.5 by 4 to get 14. This is the number of threads per inch.
- 2) Combine the thread size with the number of threads per inch and refer to.
How can you tell the difference between BSP and NPT threads?
The difference between NPT vs. With NPT, the peaks and valleys of the threads are flat. In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees and the BSP angle is 55 degrees.
What is difference between NPT and BSP thread?
Both NPT and BSP are pipe thread standards for screw threads used on pipes and pipe fittings to seal pipes. With NPT, the peaks and valleys of the threads are flat. In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees and the BSP angle is 55 degrees.
What is the difference between BSP and NPT?
What are British Standard fittings?
British Fittings are manufactured using British threads such as British Standard Pipe Parallel (BSPP) and British Standard Pipe Tapered (BSPT). These fittings and adapters are commonly found on equipment manufactured in the United Kingdom as well as from some OEM’s in Europe.
Is there a metric Pipe Thread Standard?
No such thing as metric pipe threads, the German designation is for tubing the threads have 90 thread profile. Any other tapered “pipe threads” are of “two types”, they both have the same standard for pipe dia.
What are the different types of pipe threads?
There are many different types of pipe – stainless, galvanized, black (actually iron), copper, brass, etc., but the key is the actual TYPE of thread that the fitting (or pipe) has.
What is the size of a standard pipe thread?
National Pipe Thread is a U.S. standard for tapered (NPT) or straight (NPS) threads used to join pipes and fittings. ANSI /ASME standard B1.20.1 covers threads of 60- degree form with flat crests and roots in sizes from ¹⁄16 inch to 24 inch Nominal Pipe Size.
