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BSP is a British standard for pipe threads defined by ISO 7 & ISO 228. It is the most commonly used pipe thread system outside the USA. In North America, the more popular standard is NPT. Although it is a British standard and the nominal pipe sizes are in Inches, the dimensions are defined in millimeters. The Jargon, calculations, and charts ...
British Standard Pipe (BSP) is a set of technical standards for screw threads that has been adopted internationally for interconnecting and sealing pipes and fittings by mating an external thread with an internal (female) thread.
British Standard Pipe (BSP) has been used as a standard in plumbing and pipe fittings. There are two types of BSP Thread available. One is Parallel threads or we can say Straight threads. The second one is the Taper Thread.
British Standard Pipe BSP thread chart, BSP thread chart showing TPI and drill sizes.
How to ID British Threads & Fittings. 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°.
BS taper threads are also referred to as British Standard Taper Pipe, Pipe Taper or Conical Thread. Common symbols used for the thread: BSPT, BSPTr, PT, KR, R, Rc. Usually marked: Rc size ISO. Characteristics of BSPT taper threads: tapered thread 1 o 47'. truncation of roots and crests are rounded. 55 o thread angle.
British Standard Pipe Thread (BSPT) The threaded part (s) of plumbing fittings are usually made to a British Standard Pipe Thread size (BSP). BSP sizes don't match up with what you measure on the scale of a ruler, which can obviously cause some confusion.