Overview
BSP – British Standard Pipe
BSPT – British Standard Pipe Taper – DIN 3852-1+2
BSPP – British Standard Pipe Parallel – ISO 1179-1, DIN 3852 T2
Note: Thread size refers to the nominal bore of the pipe. Subtract approx. ¼″ (6mm) from thread diameter measurement for nominal pipe size.
Sealing Methods
BSPP Sealing
BSPP male with conical 30° seat (60° included angle) seal against matching conical 30° seat of BSPP female swivel.
Form B – Seals using a metal to metal sealing edge.
Form E – Seals using an elastomer seal (Volz WD Seal).
Form B can also be used with captive O-rings or encapsulated seals for chamfered female ports.
Positional elbows and tees have a lock nut and O-ring to allow orientation of the fitting to the required direction.
BSPT Sealing
BSPT male threads seal against threads of a fixed BSPT female. Contact is made on the flanks of the threads.
Use of Volz thread sealant or thread lubricant is recommended for BSPT male to BSPT female connections.
Compatibility: Please contact us for more information about interchangeability.
Identification Table
| Nominal Pipe Size | Threads Per Inch | OD of Thread (mm) | Pitch (mm) |
|---|---|---|---|
| 1/8″ | 28 | 9.73 | 0.907 |
| 1/4″ | 19 | 13.16 | 1.337 |
| 3/8″ | 19 | 16.66 | 1.337 |
| 1/2″ | 14 | 20.96 | 1.814 |
| 3/4″ | 14 | 26.44 | 1.814 |
| 1″ | 11 | 33.25 | 2.309 |
| 1¼″ | 11 | 41.91 | 2.309 |
| 1½″ | 11 | 47.80 | 2.309 |
| 2″ | 11 | 59.61 | 2.309 |