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What is A Socket Weld Union?
Socket Weld Unions are available within the male & female types, lug nut, and Rockwood design. Union suits the MSS SP 83 standard. Socket Weld Unions are almost like couplings, they’re generally easier to require apart and permit pipes of various metals to return together safely. Stainless steel Socket Weld Unions are utilized in low piping where it’s required to dismantle the pipe often. A Forged Socket Weld Union may be a joint design. It consists of three interconnected pieces. This Union Pipe Fittings has two internal threads, and a centerpiece that pulls the ends together when rotated.
Typically socket weld union carbon steel pipe parts are locked together with the help of a radical screw or the nut with the sized cross-sections of it. In cases where there could be a sever pulling stress taking into the ASME B16.11 Socket Weld Union pipe from outside, the locking screw can break off. Also the locking screw can remove the other two parts of the union, which in turn will then separate the pipe to which it has been attached.
A socket weld union is a type of pipe fitting that is used to connect two pipes together in a way that allows for easy disassembly. The union has a threaded sleeve that is attached to one end of each of the two pipes, while the other end of the sleeve is attached to a central hub with a socket weld connection. This allows the two pipes to be easily connected and disconnected without the need for tools or special equipment, making it ideal for applications where frequent maintenance is required. The socket weld union is commonly used in high-pressure piping systems, where it is important to maintain a tight and secure seal between the connected pipes.
Socket Weld Union Specifications
| Sizes | 1/8″NB TO 4″NB |
| Standards | ASME/ANSI B16.11, MSS SP-79, MSS-SP-95, 83, 97，DIN28011, DIN2617, DIN2616, DIN2615, DIN2605，EN10253-2, EN10253-1 |
| Dimensions | ASME 16.11, MSS SP-79, MSS SP-95, 83, 95, 97, BS 3799 |
| Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc. |
| Pressure Class | 2000LBS,3000 LBS, 6000 LBS, 9000 LBS |
| From | Socket Weld union, Socket Weld End union, Socket Weld Pipe union |
| Grades&Materials | ASTM / ASME A/SA 182 – F 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L.ASTM / ASME A/SA 182 – F44, F45, F51, F53, F55, F60, F61.ASTM / ASME SB 564 / 160 / 472 – UNS 2200 (NICKEL 200), UNS 4400 (MONEL 400), UNS 8825 INCONEL (825), UNS 6600(INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 2201 (NICKEL 201), (ALLOY 20 / 20 CB 3)，ASTM / ASME SB 61 / 62 / 151 / 152 – UNS NO. C 92200, UNS NO. C 83600, UNS NO. 70600, 71500, C 70600 (CU -NI- 90/10), C 71500 (CU -NI- 70/30), UNS NO C 10100, C 10200, C 10300, C 10800, C 12000, C 12200，ASTMA 105/A694/ A350 LF3/A350 LF2 – F42, F46, F52, F56,F60, F65, F70， ASTM A182 – F1, F5, F9, F11, F22, F91，Brass CA 360, CA 345 and CA 377 / SAE J530, SAE J531 and ASA |
| Type | Socket Weld (S/W) & SCREWED (SCRD) – NPT, BSP, BSPT |
Manufacturing Standards of Socket Weld Union
| ASME Standard | ASME/ANSI B16.11, MSS SP-79, MSS-SP-95, 83, 97 |
| DIN Standard | DIN28011, DIN2617, DIN2616, DIN2615, DIN2605 |
| EN Standard | EN10253-2, EN10253-1 |
| ASME B16.11 | Socket Weld Fittings, Socket – Welding and Threaded |
| ASTM A182 – ASME SA182 | Standard Specification for Wrought Austenitic SS Piping Socket Weld Fittings |
| MSS SP-95 | Swage(d) Nipples and Bull Plugs |
ASME / ANSI B16.11 Socket Weld Union Material & Grades
| Stainless Steel Socket Weld Union |
| ASTM A403 WP Gr. 304, 304L, 304H, 310, 316, 316L, 316H, 316Ti, 317L, 321, 347, 904L |
| Carbon Steel Socket Weld Union |
| ASTM A234 WPB, WPBW, WPHY 70, WPHY 65, WPHY 60, WPHY 52, WPHY 46, & WPHY 42. |
| Low Temperature Socket Weld Union |
| ASTM A420 WPL6, ASTM A420 WPL3 |
| Alloy Steel Socket Weld Union |
| ASTM / ASME A/SA 234 Gr. WP1, WP5, WP9, WP11, WP12, WP22, WP91 |
| Duplex & Super Duplex Steel Socket Weld Union |
| ASTM A815, ASME SA815 UNS NO S31803, UNS NO S32205, UNS S32750, UNS S32950. Werkstoff No. 1.4462 |
| Nickel Alloy Socket Weld Union |
| UNS 10276 (HASTELLOY C 276), UNS 6625 (INCONEL 625), UNS 6601 (INCONEL 601), UNS 6600 (INCONEL 600), UNS 8825 (INCONEL 825), UNS 8020 (ALLOY 20 / 20 CB 3), UNS 4400 (MONEL 400), UNS 2201 (NICKEL 201), ASTM / ASME SB 336 UNS 2200 (NICKEL 200) |
High Pressure Socket Weld Union Types by Size, Class, and Wall Thickness
| Description | Class Designation | ||
| 2000 | 3000 | 6000 | |
| Unions | 1/2 – 4 | 1/2 – 2 | 1/2 – 2 |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| Pipe Size
by Wall Thickness |
SCH 80 / XS | SCH 160 | XXS |
Dimensions of ASME B16.11 Socket Weld Union
Socket Weld Union Dimension Drawing
| 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 |
ASME B16.11 Socket Weld Union Fittings Dimensions Tolerance
| Socket Weld Union ASME B16.11 Tolerance (Union) | Union | |||
| Socket Weld Fitting Dimension (NPS) | Outside Diameter at Bevel |
Inside Diameter at End |
Wall Thickness T | Center-to-End Dimension A ,C ,B |
| 1/2 to 2-1/2 | +0.06 | Not less than 87.5% of nominal thickness |
+/- 0.06 | |
| -0.03 | ||||
| 3 to 3-1/2 | +/- 0.06 | +/- 0.06 | +/- 0.06 | |
| 4 | +/- 0.06 | +/- 0.06 | +/- 0.06 | |
| 5 to 8 | +/- 0.06 | +/- 0.06 | +/- 0.06 | |
| 10 to 18 | +0.16 | +/- 0.12 | +/- 0.09 | |
| -0.12 | ||||
| 20 to 24 | +0.25 | +/- 0.19 | +/- 0.09 | |
| -0.19 | ||||
| 26 to 30 | +0.25 | +/- 0.19 | +/- 0.12 | |
| -0.19 | ||||
| 32 to 48 | +0.25 | +/- 0.19 | +/- 0.19 | |
| -0.19 | ||||
Socket Weld Union Weight
Socket Weld Union Weight
| CLASS 3000 Socket Weld Union | ||||||||||||
| PIPE SIZE | 1/8 | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | 2-1/2 | 3 | 4 |
| A | 1.375 | 1.375 | 1.625 | 1.813 | 2.250 | 2.562 | 3.063 | 3.438 | 4.063 | 4.875 | 5.688 | 6.875 |
| B | 1.688 | 1.688 | 1.813 | 1.938 | 2.250 | 2.438 | 2.813 | 3.000 | 3.375 | 4.031 | 4.313 | 8.000 |
| C | 0.865 | 0.865 | 1.025 | 1.235 | 1.465 | 1.795 | 2.165 | 2.425 | 2.965 | 3.615 | 4.305 | 5.415 |
| D | 0.426 | 0.560 | 0.693 | 0.859 | 1.071 | 1.335 | 1.682 | 1.922 | 2.410 | 2.910 | 3.536 | 4.545 |
| E | 0.813 | 0.813 | 0.938 | 0.938 | 1.125 | 1.188 | 1.438 | 1.500 | 1.625 | 2.250 | 2.313 | 5.000 |
| LBS | 0.40 | 0.38 | 0.52 | 0.73 | 1.19 | 1.66 | 2.66 | 3.42 | 5.36 | 9.12 | 12.58 | 17.50 |
| CLASS 6000 Socket Weld Union | ||||||||||||
| PIPE SIZE | 1/8 | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | 2-1/2 | 3 | 4 |
| A | 1.375 | 1.625 | 1.813 | 2.250 | 2.562 | 3.063 | 3.438 | 4.063 | 4.875 | 5.688 | 6.875 | — |
| B | 1.688 | 1.813 | 1.938 | 2.250 | 2.438 | 2.813 | 3.000 | 3.375 | 4.031 | 4.313 | 8.000 | — |
| C | 0.865 | 1.025 | 1.235 | 1.465 | 1.795 | 2.165 | 2.425 | 2.965 | 3.615 | 4.305 | 5.415 | — |
| D | 0.426 | 0.560 | 0.693 | 0.859 | 1.071 | 1.335 | 1.682 | 1.922 | 2.410 | 2.910 | 3.536 | — |
| E | 0.813 | 0.813 | 0.938 | 0.938 | 1.125 | 1.188 | 1.438 | 1.500 | 1.625 | 2.250 | 5.750 | — |
| LBS | 0.48 | 0.56 | 0.75 | 1.35 | 2.01 | 3.17 | 3.92 | 6.60 | 10.12 | 14.00 | 40.891 | — |
| CLASS 9000 Socket Weld Union | ||||||||||||
| PIPE SIZE | 1/8 | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | 2-1/2 | 3 | 4 |
| A | 1.750 | 2.000 | 2.250 | 2.563 | 3.063 | 3.688 | 4.313 | 5.000 | 5.750 | 6.875 | — | — |
| B | 2.500 | 2.563 | 2.938 | 3.250 | 3.750 | 4.000 | 4.625 | 4.813 | 5.563 | 6.25 | — | — |
| C | 1.000 | 1.250 | 1.500 | 1.750 | 2.250 | 2.500 | 3.000 | 3.625 | 4.250 | 5.000 | — | — |
| D | 0.426 | 0.560 | 0.693 | 0.859 | 1.071 | 1.335 | 1.682 | 1.922 | 2.410 | 2.910 | — | — |
| E | 1.720 | 1.688 | 1.938 | 2.000 | 2.375 | 2.375 | 3.000 | 2.938 | 3.188 | 3.750 | — | — |
| LBS | 0.89 | 1.045 | 1.955 | 3.29 | 5.34 | 7.99 | 12.73 | 18.34 | 26.36 | 37.07 | — | — |
ASME B16.11 SS Socket Weld Union Angularity Tolerance
| ND | Max off angle | Max off plane |
| Q | P | |
| 1/2 a 4 | 1 | 2 |
| 5 a 8 | 2 | 4 |
| 10 a 12 | 3 | 5 |
| 14 a 16 | 3 | 7 |
| 18 a 24 | 4 | 10 |
| 26 a 30 | 5 | 10 |
| 32 a 42 | 5 | 13 |
| 44 a 48 | 5 | 20 |
ASME B16.11 Forged Socket Weld Union Available Types
| Forged Socket weld Union | Socket weld Union |
| 150 lb. Socket Weld Fittings Union | Socket weld Forged Union |
| ASME B16.11 Forged Socket weld Union | Forged Unions 3000LB Socket Weld |
| Stainless Steel Union Suppliers | SS Forged Socket weld Union |
| ANSI B16.11 Forged Socket weld Union Dealer | BS 3799 Forged Unions Exporter |
| Forged Socket weld Union Stockholder | Socket weld Forged Union Distributors |
| Carbon Steel Socket weld Union | High Quality Socket weld Union Manufacturer |
| ASTM A182 Socket weld Stainless Steel Union | Duplex Steel Socket weld Union |
| Super Duplex Steel End Unions | Copper Nickel Socket weld Union |
| High Nickel Alloy Forged Socket weld Union | Hastelloy Socket weld Union Stockist |
| Titanium Forged Socket weld Union | Inconel Socket weld Unions |
Socket Weld Union Application
- Stainless Steel Forged Socket weld Union uses in Oil and Gas Pipeline
- Forged Socket weld Union uses in Chemical Industry
- Alloy Steel Socket weld Union uses in Plumbing
- Forged Socket weld End Unions uses in Heating
- Socket weld Forged Unions uses in Water Supply Systems
- ANSI B16.11 Forged Socket weld Union uses in Power Plant
- Socket weld Union uses in Paper & Pulp Industry
- Forged Socket weld Unions uses in General Purpose Applications
- Forged Socket weld Union uses in Fabrication Industry
- Forged Socket weld Union uses in Food Processing Industry
- Forged Socket weld Unions uses in Structural Pipe
