Whitworth-pipe threads ACC. DIN/ISO 2999 outside conical, inside cylindric

Whitworth-pipe threads ACC. DIN/ISO 2999 outside conical, inside cylindric

Thread Whitworth-pipe tread acc. DIN 2999
Abbreviation Rp / R
Designation DIN 2999-Rp-1/2 DIN 2999-R-1/2-1
Type of thread inside thread cylindric outside thread conical (cone 1:16)
Application Pipe thread, to suit pipe threads and fittings, with sealant (see page 10), sealing in the thread
Description The conical R-outside thread shows at the relating level &147;. The adjustment power created by using of a suitable tool increases the thread reach and seals the screw connection supported by a suitable sealant (e.g. hemp or Teflon).
Comparison with DIN/ISO 228 The cylindric Rp-inner thread of this norm shows the same dimensions of the diameters and of the thread profile as the cylindric inner thread acc. DIN/ISO 228, however the G-inner thread shows concerning the core and effective diameter positive dimensions only (at DIN 2999 ±tolerance). Therefore a DIN 2999-R-conical outside thread can be screwed into a ISO 228-G-cylindric inner thread. However the outside thread can be approx. screwed in 1 furthermore thread-turn opening at the G-thread a larger free space between the crest of thread and with that a larger leakage space caused by the bigger tolerance of the core diameter.
Never combine ISO 228-G-cyl. outside thread with DIN 2999-Rp-cyl. inside thread. The inside thread could be possibly to small.

 

DIN
outside thread R
inside thread Rp
outside Ø of pipe
number of threads
P
h
outside Ø
effective Ø
core Ø
a
i
6R 1/8"Rp 1/8"10.2280.9070.5819.7289.1478.56646.5
8R 1/4"Rp 1/4"13.5191.3370.85613.15712.30111.44569.7
10R 3/8"Rp 3/8"17.2191.3370.85616.66215.80614.956.410.1
15R 1/2"Rp 1/2"21.3141.8141.16220.95519.79318.6318.213.2
20R 3/4"Rp 3/4"26.9141.8141.16226.44125.27924.1179.514.5
25R 1"Rp 1"33.7112.3091.47933.24931.7730.29110.416.8
32R 1 1/4"Rp 1 1/4"42.4112.3091.47941.9140.43138.95212.719.1
40R 1 1/2"Rp 1 1/2"48.3112.3091.47947.80346.32444.84512.719.1
50R 2"Rp 2"60.3112.3091.47959.61458.13556.65615.923.4
65R 2 1/2"Rp 2 1/2"76.1112.3091.47975.18473.70572.22617.526.7
80R 3"Rp 3"88.9112.3091.47987.88486.34184.92620.629.8
100R 4"Rp 4"114.3112.3091.479113.03111.551110.07225.435.8
125R 5"Rp 5"139.7112.3091.479138.43136.951135.47228.640.1
150R 6"Rp 6"165112.3091.479163.83162.351160.87228.640.1