Withworth-pipe thread 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.