British Pipe Thread ( Whitworth Form) -- Parallel (BSPP/BSPF) Thread Designation Nominal Size Thread Form Type Major Diameter mm d=D Pitch mm p Threads per inch Pitch Diameter mm d2=D2 Minor Diameter Male Thd. d3 Thread Height H1 Tap Drill Diameter mm G1/8 1/8" BSPP 9.728 0.907 28 9.147 8.566 0.581 8.70
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If the diameter stays the same from the first to last thread then the thread is classified as a parallel thread (BSPP). Once it is known whether the thread is
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Thread Specification - BSPT & BSPP (BS21). TECHNICAL DATA. 10.41. BSPT male threads seal against threads of fixed BSPT female.
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G/R/RP - Withworth thread (BSPP/BSPT) ; R 1/8, Rp 1/8, 9,728 ; R 1/4, Rp 1/4, 13,157 ; R 3/8, Rp 3/8, 16,662 ; R 1/2, Rp 1/2, 20,955
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BSPT & BSPP Threads Dimensions. 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
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The main difference between NPT and BSP threads is that the thread angle in NPT threads is 60 degrees while that of BSP pipes is 55 degrees. BSP threads are usually straight/parallel while NPT threads are usually tapered. If the threads are the same size then it is BSP whereas if the first thread is small (in diameter) that the last then it
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Specifications Dimensions Threads Surface Treatments Applications. Blog. Log in. BSPF Threads ( British Standard Pipe Parrallel Fine ) G 1/16" - G 1" G 1 1/8" - G 3" G 3 1/4" - -G 6" Size
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27 rows · External thread th. Designation of thread. Number of threads in 25.4 mm. Pitch P. Height of thread h. major d = D. pitch d2 = D2. minor d1 = D1. Lower deviation.
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Size Nominal Size (in) Actual Major Thread Diameter in inches 2 1/8 0.383 4 1/4 0.518 6 3/8 0.656 8 1/2 0.825
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1/16" BSPP 28 0.907 0.581 7.723 7.142 6.561 0 0.107 ‑0.107 ‑0.214 0.282 1/8" BSPP 28 0.907 0.581 9.728 9.147 8.566 0 0.107 ‑0.107 ‑0.214 0.282 1/4" BSPP 19 1.337 0.856 13.157 12.301 11.445 0 0.125 ‑0.125 ‑0.25 0.445 3/8" BSPP 19 1.337 0.856 16.662 15.806 14.95 0 0.125 ‑0.125 ‑0.25 0.445
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British Standard Pipe(BSPP, BSPF) Thread Form r = Basic Radius = * 137329 p h = Basic Depth of Thread = *640327 p p = Pitch = 1/t.p.i. (Threads per Inch) ISO 228, DIN 259, BS2779, JIS B0202 In Japan this thread is known as (PF) Use prefix G for parallel thread. Example: G1/2 11 /
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NPT/NPS threads have a 60° included angle and have flattened peaks and valleys (this is a Sellers thread form); BSP threads have a 55° included angle and have rounded peaks and valleys (this is a Whitworth thread form). NPT and BSP thread pitches (threads per inch, TPI) are listed below.
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Likewise, pipe thread can be parallel (e.g., BSPP). For pipe thread, determine the size by comparing it with a nominal size profile, as shown in Figure 1 (a useful tip - pipe sizes up to 2" nominal size can be determined by measuring the actual outside diameter, subtracting ¼" then rounding-off).
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Typical sizes and uses are : 1/4 Inch BSP - Compressed air connectors. 3/8 Inch BSP - Central heating oil line connectors, some European toilet cistern fill valves (not common in UK). 1/2 Inch BSP - Bathroom basin taps and kitchen sink taps, radiator connections, shower hoses, old outside tap outlets, toilet cistern fill / float valves.
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Likewise, pipe thread can be parallel (e.g., BSPP). For pipe thread, determine the size by comparing it with a nominal size profile, as shown in Figure 1 (a
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BSPP ( British Standard Pipe Parallel) taps produce a straight whitworth (55 degree) thread in standard sizes from 1/16 to 6 somewhat related to the inside diameter of pipe. What do these icons mean? Product Options & Sizes Distributors Order Online Test This Tool
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National Pipe Thread (NPT) 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 ( ) thread. National Pipe Threads are similar in function to BSP threads, but are not generally interchangeable.
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BSP thread sizes typically are 1 pitch number higher than the NPT threads . I.e. in 1/4" pipe size, the NPT thread is 18 threads /inch; BSP is 19 threads /inch. There are other differences (in thread form for instance) as well. Bottom line is the two don't mate up. I have experience with one size only, 3" nominal.
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BSP Fittings Sizes/Specifications 4-2 BSP Fittings – 3 Sizes/Specfii cations Dimensions Nominal Size of Outlet D Min O/D E Min O/D of body behind external thread d Min I/D of body behind internal thread No. of threads per inch in mm mm mm mm 1/ 4 6 15.0 9.8 8.6 28 5/ 16 8 18.5 13.3 11.4 19 / 8 10 22.0 16.8 15.0 19 5/ 8 15 27.0 21.1 18.6 14 3/.
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Title: British Standard Pipe Taper (BSPT) Threads Size Chart Author: Pyromation Inc. Subject: BSPT Thread Created Date: 5/7/ 8:36:01 AM
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What are BSP thread sizes? ; 3/8", 6/10 inch, 15mm ; 1/2", 15 BSP, 3/4 inch, 19mm.
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