British Standard
| BSP | BRITISH STANDARD PIPE | Also known as whitworth 55° thread form |
| BSPT | BRITISH STANDARD PIPE TAPER | Thread form as 1722.1, BS 21, ISO 7-1, DIN 3852-2 FORM C (MALE), DIN 3852-2 FORM Z (FEMALE) |
| BSPP | BRITISH STANDARD PIPE PARALLEL | Thread form per as 1722.2, ISO 228 (THREAD TYPE), ISO 1179 |
| BSPO | BRITISH STANDARD PIPE PARALLEL O-RING | Thread form per as 1722.2, ISO 228 (THREAD TYPE), ISO 8434-6, BS 5200 |
British Standard Pipe (BSP) is a family of technical standards for threads that has been adopted internationally for interconnecting hoses and fittings by mating an external (male) thread with an internal (female) thread. British Standard Pipe threads are similar in function to NPT threads, but are generally not interchangeable.
These are pipe threads where pressure-tightness is made through the mating of two threads together. They always use a taper male thread but can have either parallel or taper female threads. (International standards require all female threads to be parallel.)
These are parallel pipe threads used where a pressure-tight joint is achieved by the compression of a soft material (such as an o-ring seal or a washer) between the end face of the male thread and a socket or nipple face, with the tightening of a back nut.
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.
Measure the BSPT male thread OD and female thread ID at the first full thread near the end of the fitting.
BSPT male and BSPP male with conical 30° seat (60° included angle) seal against matching conical 30° seat of BSPP female swivel.
BSPP O Ring male connector has straight threads and O Ring with metal Retaining Ring. It seals against flat external surface of BSPP female port.
BSPP male, with chamfer to locate Bonded Seal also seals against flat external surface of BSPP female port.
Surface irregularities require a Spot Face to ensure effective sealing. Elbows and tees have Lock Nut to allow orientation of fitting to required direction.
BSPP male and BSPP female flat face swivel require a suitable soft washer between faces to seal. For low working pressure.
| BSPT & BSPP SIZE & PITCH | DASH SIZE | BSPT MALE THREAD OD | BSPP MALE THREAD OD | BSPT FEMALE THREAD ID | BSPP FEMALE THREAD ID | ||||
|---|---|---|---|---|---|---|---|---|---|
| inch-TPI | mm | inch | mm | inch | mm | inch | mm | inch | |
| 1/8 – 28 | -02 | 9,5 | 0.37 | 9,6 | 0.38 | 8,4 | 0.33 | 8,6 | 0.34 |
| 1/4 – 19 | -04 | 12,8 | 0.50 | 13,0 | 0.51 | 11,2 | 0.44 | 11,9 | 0.47 |
| 3/8 – 19 | -06 | 16,3 | 0.64 | 16,5 | 0.65 | 14,7 | 0.59 | 15,2 | 0.60 |
| 1/2 – 14 | -08 | 20,4 | 0.80 | 20,8 | 0.82 | 18,3 | 0.72 | 19,1 | 0.75 |
| 5/8 – 14 | -10 | 22,5 | 0.89 | 22,8 | 0.90 | 20,6 | 0.81 | 20,8 | 0.82 |
| 3/4 – 14 | -12 | 25,9 | 1.02 | 26,3 | 1.04 | 23,9 | 0.94 | 24,6 | 0.97 |
| 1 – 11 | -16 | 32,6 | 1.28 | 33,1 | 1.30 | 29,7 | 1.17 | 30,7 | 1.21 |
| 1.1/4 – 11 | -20 | 41,1 | 1.62 | 41,8 | 1.64 | 38,6 | 1.52 | 39,4 | 1.55 |
| 1.1/2 – 11 | -24 | 47,0 | 1.85 | 47,7 | 1.88 | 44,5 | 1.75 | 45,5 | 1.79 |
| 2 -11 | -32 | 58,6 | 2.31 | 59,5 | 2.34 | 56,4 | 2.22 | 57,4 | 2.26 |
| 2.1/2 – 11 | -40 | 74,1 | 2.92 | 75,1 | 2.95 | 71,9 | 2.83 | 72,6 | 2.86 |
| 3 – 11 | -48 | 86,6 | 3.41 | 87,9 | 3.46 | 84,6 | 3.33 | 85,4 | 3.36 |
Thread size refers to the nominal bore of the pipe. Subtract approx. 1/4″ (6mm) from thread diameter measurement for nominal pipe size.
Pitch is Threads Per Inch (TPI). “Gas”, “R” & “G” also refer to BSP. “Male Iron (Pipe)” may be BSP or NPT.
BSP Hydraulic Fittings / BSPT Hydraulic Fittings
BSP thread stands for British Standard Hydraulic Pipe, british hydraulic fittings is common in Australia and the commonwealth countries. British fittings are based on trade size rather than actual diameter which can lead to some confusion when measuring ports. We are british hose fitting factory in China. British fittings are manufactured using British threads such as British Standard Pipe Parallel (BSPP) and British Standard Pipe Tapered (BSPT).
There are two types of BSP threads Hydraulic Fitting;
- British standard pipe parallel BSPP - Female & male thread are both (also known as G), it refers to parallel or straight threads.
-British Strd Pipe Tapered BSPT - Female thread is parallel and the male thread is tapered (also know as R/Rp) (the female thread can also be tapered, these are fairly rare to find). Within BSPT it is also common to call the female thread BSPP (parallel) and the male BSPT (tapered) even though they are both technically a BSPT thread form (the female would be parallel and the male would be tapered).
There are two types of BSP threads, BSPP and BSPT. BSPP refers to parallel or straight threads. Meanwhile, BSPT refers to tapered threads. Sometimes BSPP threads are referred to as G threads and BSPT threads as R threads.
Both threads hydraulic fitting have the same pitch, angle (55 degrees) and shape (rounded peaks and valleys). British Fittings are manufactured using British threads such as British Standard Pipe Parallel (BSPP) and British Standard Pipe Tapered (BSPT). At British fittings, PEHEL carry a variety of metric fittings, valves, washers and more. Contact PEHEL pneumatic accessories and hydraulic fittings for sale now.
Our high levels product quality,quick response 24/7 service will satisfy all of our clients.
PEHEL hydraulics is a manufacturer of hose fittings, hydraulic adapters, hose assembly, manifold block, hydraulic machine, flange fittings.
Our hydraulic products have a wide range applications, they include petrochemical, engineering machinery, injection molding machinery, mining equipment, agricultural machinery, ships, cars, machine manufacturing and custom hydraulic systems etc...
