Threaded steel socket dimensions

The CSV uses semicolons as separators. The link carries the selected size.

TYPE

SIZE

Size	DN	d2major dia.	Lfull socket	lhalf socket
Rp 1/4	DN8	18.5	25	11
Rp 3/8	DN10	21.3	26	12
Rp 1/2	DN15	26.4	34	15
Rp 3/4	DN20	31.8	36	17
Rp 1	DN25	39.5	43	20
Rp 1 1/4	DN32	48.3	48	22
Rp 1 1/2	DN40	54.5	48	22
Rp 2	DN50	66.3	56	26
Rp 2 1/2	DN65	82	65	30
Rp 3	DN80	95	71	34
Rp 4	DN100	122	83	40
Rp 5	DN125	147	92	44
Rp 6	DN150	174	92	44

Notes

This table has been compiled by Emsal from the relevant standards. For the full text of the standard, refer to your national standards body.
Both ends of the socket are threaded ISO 7-1 Rp (parallel internal thread); it forms a tight joint with pipe that has a taper external (R) thread.
The medium type (DIN 2986) is for general installations; the heavy type (BS 1387) has a thicker wall and is longer.
A half socket is threaded at one end and welded to a tank or pipe at the other (e.g. for an instrument connection).
Accuracy and currency are not guaranteed; use the current edition of the standard for design and purchasing decisions. How the library is compiled →

d2	Major diameter	L	Full socket length
Rp	Internal thread (ISO 7-1)	l	Half socket length

A socket (coupling) is a fitting with female threads at both ends; it joins two pipes, or a pipe and a male-ended part, end to end.

female partmale part, pipegasket / sealing tapethread

Cut external threads on the pipe ends.
Apply tape or compound to the threads.
Screw the socket onto one pipe, then the other; if the line will be taken apart, use a union instead.

Used to extend threaded pipework and to connect equipment into the line. Half sockets are also welded on to create nozzles on tanks and vessels.

P&ID: Threaded jointTwo short thin lines perpendicular to the pipeline. Symbol library →

Not to scale; proportions are indicative.