Socket Weld Connection

Socket weld connection The socket welding ends are prepared by boring in each end of the valve a socket with an inside diameter slightly larger than the pipe outside diameter. The pipe slips into the socket where it butts against a shoulder and then joins to the valve with a fillet weld.

Socket welding ends in a given size are dimensionally the same regardless of pipe schedule. They are usually furnished in sizes through 2-inch.

Socket Welding up to Ansi B16.11

Nominal Pipe Size NPS [inches]	Nominal Diameter DN [mm]	Socket Bore Diameter B [mm]		Min. Depth of the socket J [mm]
Nominal Pipe Size NPS [inches]	Nominal Diameter DN [mm]	min.	max.	Min. Depth of the socket J [mm]
1/8	10	10.8	11.2	9.5
1/4	8	14.2	14.6	9.5
3/8	10	17.6	18.0	9.5
1/2	15	21.8	22.2	9.6
3/4	20	27.2	27.6	12.5
1	25	33.9	34.3	12.5
1 1/4	32	42.7	43.1	12.5
1 1/2	40	48.8	49.2	12.7
2	50	61.2	61.7	16.0
2 1/2	65	73.9	74.4	16.0
3	80	89.8	90.3	16.0
4	100	115.2	115.7	19.0

Standards for Socket-Welding connections

B16.11 - 2009 Forged Fittings, Socket-Welding and Threaded
This Standard covers ratings, dimensions, tolerances, marking and material requirements for socket-welding and threaded forged fittings. These fittings are designated as Class 2000, 3000, and 6000 for threaded end fittings and Class 3000, 6000, and 9000 for socket-weld end fittings.