What is socket weld union

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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