A socket weld union is a weld used when attaching socket flanges to iron pipe. The socket flange allows two different-diameter pipes to be connected together and retain a high-flow characteristic. Exactly as the name implies, the socket weld union actually welds a pipe into a recessed socket fitting in the socket flange, creating a high-strength socket weld union capable of withstanding high pipeline pressure without connection failure. Once the pipe is pushed into the flange, the socket weld union is used to surround the outside diameter of the pipe, fusing the two components together as a single component. The weld varies from a common butt weld in that it surrounds a small-diameter pipe where it enters a larger-diameter pipe, instead of simply joining two equally-sized surfaces together.
When making a socket weld union, it is imperative that the inner pipe not be pushed completely into the larger pipe so that it bottoms out in the socket. Failure to pull the inner pipe slightly off of the bottom surface of the socket can result in stress failure of the socket and the weld. This damage occurs when the heat from the welding procedure causes the two pipes to expand. Without a small gap between the bottom of the inner pipe and the bottom of the socket, the two could make contact and push against each other, thereby compromising the integrity of the socket weld union.
Product name : socket weld union
Nominal Diameter
Outside Diameter
Wall Thickness
Socket Bore
Water way Bore
Depth of Socket
Length Assem Nominal
Dmin
Cmin
d1
d2
Jmin
L
DN
NPS
Socket
Threaded
Socket
Threaded
Socket
Socket & Threaded
Socket
Socket & Threaded
6
1/8
21.8
14.7
3.2
2.5
10.65
6.43
10
41.4
8
1/4
21.8
19.0
3.3
3.1
14.10
9.45
10
41.4
10
3/8
25.9
22.9
3.5
3.2
17.55
13.51
10
46.0
15
1/2
31.2
27.7
4.1
3.8
21.70
17.07
10
49.0
20
3/4
37.1
33.5
4.3
4.0
27.05
21.39
13
56.9
25
1
45.5
41.4
5.0
4.6
33.80
27.74
13
62.0
32
11/4
54.9
50.5
5.3
4.9
42.55
35.36
13
71.1
40
11/2
61.5
57.2
5.6
5.1
48.65
41.20
13
76.5
50
2
75.2
70.1
6.1
5.6
61.10
52.12
16
86.1
65
21/2
91.7
85.3
7.7
7.1
73.80
64.31
16
102.4
80
3
109.2
102.4
8.4
7.7
89.80
77.27
16
109.0
Stainless Steel Socket Weld Union
ASTM / ASME SA A182 F304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
Carbon Steel Socket Weld Union
ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2
Alloy Steel Socket Weld Union
ASTM / ASME A182 F1/ F5/ F9/ F11/ F22/ F91
Nickel Alloy Socket Weld Union
ASTM / ASME SB 336 UNS 2200 (NICKEL 200) , UNS 2201 (NICKEL 201 ) , UNS 4400 (MONEL 400 ) , UNS 8020 ( ALLOY 20 / 20 CB 3 ) , UNS 8825 INCONEL (825) , UNS 6600 (INCONEL 600 ) , UNS 6601 (INCONEL 601) , UNS 6625 (INCONEL 625) , UNS 10276 (HASTELLOY C 276)
Copper Alloy Steel Socket Weld Union
ASTM / ASME SB 111 UNS NO. C 10100 , C 10200 , C 10300 , C 10800 , C 12000, C 12200, C 70600 , C 71500 ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C 71500 ( CU -NI- 70/30)
Duplex Steel Socket Weld Union
ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760
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