Page 503 - RHAU-MKT RYCO Product Technical Manual 2018-12-14 v1-9
P. 503

 BSPT & BSPP THREADS
TECHNICAL ADAPTORS COUPLINGS HOSE INTRODUCTION
BSP IS BSPT IS
BSPP IS
BRITISH STANDARD PIPE BRITISH STANDARD PIPE TAPER
BRITISH STANDARD PIPE PARALLEL
ALSO KNOWN AS WHITWORTH 55° THREAD FORM THREAD FORM PER AS 1722.1, BS 21, ISO 7-1,
DIN 3852-2 FORM C (MALE), DIN 3852-2 FORM Z (FEMALE)
THREAD FORM PER AS 1722.2, ISO 228 (THREAD TYPE), ISO 1179
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 and BSPP female swivel with O Ring.
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 THREAD DIMENSIONS
BSPT & BSPP SIZE & PITCH
inch - TPI
1/8 - 28 1/4 -19 3/8 - 19 1/2 - 14 5/8 - 14 3/4 -14 1 - 11 1.1/4 - 11 1.1/2 - 11 2 - 11 2.1/2 - 11 3 -11
DASH BSPT MALE SIZE THREAD OD
BSPP MALE THREAD OD
BSPT FEMALE THREAD ID
mm inch
BSPP FEMALE THREAD ID
mm inch
Thread size refers to the nominal bore of the pipe. Subtract approx.1/4" (6 mm) 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.
mm inch mm inch
-02 9,5 0.37 9,6 0.38 -04 12,8 0.50 13,0 0.51 -06 16,3 0.64 16,5 0.65 -08 20,4 0.80 20,8 0.82 -10 22,5 0.89 22,8 0.90 -12 25,9 1.02 26,3 1.04 -16 32,6 1.28 33,1 1.30 -20 41,1 1.62 41,8 1.64 -24 47,0 1.85 47,7 1.88 -32 58,6 2.31 59,5 2.34 -40 74,1 2.92 75,1 2.95 -48 86,6 3.41 87,9 3.46
8,4 0.33 8,6 0.34 11,2 0.44 11,9 0.47 14,7 0.59 15,2 0.60 18,3 0.72 19,1 0.75 20,6 0.81 20,8 0.82 23,9 0.94 24,6 0.97 29,7 1.17 30,7 1.21 38,6 1.52 39,4 1.55 44,5 1.75 45,5 1.79 56,4 2.22 57,4 2.26 71,9 2.83 72,6 2.86 84,6 3.33 85,4 3.36
THREAD AND CONNECTOR IDENTIFICATION
CONNECTING PARTNERSHIPS
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