Are British Pipe threads tapered?

British Standard Pipe fittings are among the most popular of all foreign threads in the world today. These threads come in two versions: parallel (BSPP), and tapered (BSPT). The thread flank angle for both tapered and parallel British threads is 55°.

What is British taper?

BSPT (British Standard Pipe Taper) is similar to NPT except there are important differences. The angle across the flanks of threads (if you sliced the fitting in half long-ways and measured the angle from root to crest to root) is 55 degrees instead of 60 degrees as it is for NPT.

Is BSP parallel or tapered?

Most BSP female threads are parallel. Parallel threads provide more reliable seals and, in our experience, should always be considered in preference to taper threads if possible.

Is BSP thread tapered?

BSP thread form stands for British Standard Pipe and is common in Australia and the commonwealth countries. – 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).

Which is British pipe fittings have tapered threads?

Hydraulics Direct offers top quality British standard pipe taper (BSPT) adapters. These BSPT fittings feature a tapered thread, and the thread flank angle for all these threads is 55°.

When to use British Standard Taper thread ( BSPP )?

BSPP thread 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 backnut. British Standard Pipe Taper thread (BSPT) whose diameter increases or decreases along the length of the thread.

Which is the British standard pipe Parallel Thread?

BSPT is BRITISH STANDARD PIPE TAPER THREAD – Thread form per AS 1722.1, BS 21, ISO 7. BSPP is BRITISH STANDARD PIPE PARALLEL THREAD – Thread form per AS 1722.2, ISO 228. British Standard Pipe Parallel Thread (BSPP)

What is the size of a taper pipe?

Taper is 3/4″ taper per foot ( 1 in 16 on the diameter). Various other symbols are BSPT, BSPTr, PT, KR, Rc. Angle of thread = 55°. Nominal Size.