BSPP (G) – British Standard Pipe Parallel • BSPT (R/Rp) – British Standard Tapered Pipe, for pipes and tapered thread. An appropriate sealing compound can be used in the thread to ensure a leak-proof joint. BSPP (G) Thread size (inch) Major Diameter (mm)
Secondly, is BSP same as G thread?
Is G thread the same as BSPP? The two types of thread are the same parallel straight. BSPP is the British Standard Pipe Parallel thread and it is also denoted by the letter G (ISO standard). Therefore, BSPP is the same as G.
Also, what is G in pitch gauge?
G means Gang (or Gänge in plural), not in English but in German! Gang is the same as your TPI. So 13G means 13 turns (Gänge), same as 13 TPI. Maybe the gauge was made in Germany.
How do I know my BSP thread size?
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 (. 25?). For example, a BSP parallel male thread measures out to O.D 1?.
There are two types of BSP threads; – BSPP – Female & male thread are both (also known as G) – BSPT – Female thread is parallel and the male thread is tapered (also know as R/Rp) (the female thread can also be tapered it is then Rc, these are fairly rare to find).
In most situations that don’t involve high pressure, a male NPT fitting can be threaded into a female BSPP fitting, using Teflon tape to seal. Note that because the male NPT fitting is tapered it will thread a little farther into the straight threaded BSPP female fitting.
As a general “rule of thumb” an NPT thread is approximately 1/4″ (0.25”) larger than its “name.” For a 1/4″ NPT fitting the “nominal” OD is 0.533”. NPT fittings are slightly tapered so the “nominal” diameter is the diameter in the middle of the threaded portion, as measured by the top (crest) of the threads.
Specifications. 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.
NPT tooth has a 60-degree angle, G thread angle is 55 degrees. … NPS thread –National Pipe Straight- is not interchangeable with NPT thread. The most common types of whitworth thread are: BSPP (G) – British Standard Pipe Parallel • BSPT (R/Rp) – British Standard Tapered Pipe, for pipes and tapered thread.
NPT has a tapered male and female thread which seals with Teflon tape or jointing compound.
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.