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What is a sockolet (Socket Weld Outlet)?

DataTime:[1/28/2017]

What is a sockolet (Socket Weld Outlet)?

A Sockolet is the same basic design as a "weldolet" or "threadolet" where the major difference is that a Sockolet has a socket for welding versus a buttweld connection that a Weldolet has. This makes a 90° branch and comes in full size or reducing for a straight piece of pipe. Sockolets are available in Class 3000, 6000 and 9000 for high pressures.


What is the difference between a weldolet and a sockolet?


The weldolet and the sockolet both have a run end and a branch end. The run end connects to the larger diameter pipe, and the branch end connects to the smaller diameter pipe. The connection to the run pipe is a fillet weld for both the weldolet and the sockolet. They differ, however, at the connection to the branch pipe. The weldolet has a bevelled end to butt weld to the branch pipe (which will also have a bevelled end), whereas the sockolet has a socket into which a plain end branch pipe is inserted, then fillet welded together.

Dimensions Reducing Sockolets - MSS SP97
What is a sockolet (Socket Weld Outlet)?

CLASS 3000

NPS A B C D E
1/2 1
25.40
1.13/32
35.71
29/32
23.01
0.622
15.80
9/16
14.28
3/4 1.1/16
26.98
1.23/32
43.65
1.5/32
29.36
0.824
20.93
9/16
14.28
1 1.5/16
33.33
2
50.8
1.7/16
36.51
1.049
26.64
25/32
19.84
1.5/16
33.33
2.9/16
65.08
1.3/4
44.45
1.380
35.05
3/4
19.05
1.3/8
34.92
2.27/32
72.23
2
50.8
1.610
40.89
3/4
19.05
2
38.1
3.15/32
88.10
2.9/16
65.08
2.067
52.50
13/16
20.63
1.9/16
39.68
4.1/16
103.18
3
76.2
2.469
62.71
3/4
19.05
3 1.3/4
44.45
4.13/16
122.23
3.11/16
93.66
3.068
77.93
15/16
23.81
1.11/16
42.86
5.3/8
136.52
4.7/16
112.71
3.548
90.12
11/16
17.46
4 1.7/8
47.62
5.31/32
151.60
4.3/4
120.65
4.026
102.26
1.1/16
26.98
5 2.5/8
66.67
7.5/16
185.73
5.9/16
141.28
5.047
128.19
1.11/32
34.13
6 2.3/4
69.85
8.5/8
219.07
6.11/16
169.86
6.065
154.05
1.13/32
35.71
X = Min. 1/16 (1.6 mm)

CLASS 6000

NPS A B C D E
1/2
31.75
1.23/32
43.65
3/4
19.05
0.466
11.84
7/8
22.22
3/4 1.7/16
36.51
1.61/64
49.60
1
25.4
0.614
15.60
7/8
22.22
1 1.9/16
39.68
2.7/16
61.91
1.5/16
33.33
0.815
20.70
15/16
23.81
1.5/8
41.27
2.23/32
69.05

38.1
1.160
29.46
13/16
20.63
1.11/16
42.86

82.55
1.15/16
49.21
1.338
33.99
7/8
22.22
2 2.1/16
52.38
4.1/32
102.39
2.3/4
69.85
1.689
42.90
1.3/16
30.16
X = Min. 1/16 (1.6 mm)
General notes:
  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Bottoming Clearance - X - The purpose for the bottoming clearance in a Socket Weld is usually to reduce the residual stress at the root of the weld that could occur during solidification of the weld metal, and to allow for differential expansion of the mating elements.
  • Socket dimensions are in accordance with ASME B16.11. Design per MSS SP-97.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Sockolet® is a registered name. Another often used name is Socket Weld Outlet.

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