Industrial Forged Couplings – Threaded & Socket Weld, Full & Half Type – Sizes from 1/8” to 4” – Available in Carbon Steel, SS 304/316, Alloy F11/F22, Duplex 2205, and Nickel Alloys – Compliant with ASME B16.11 & MSS-SP Standards.
Coupling are crucial components used in piping systems to connect two pipes in a straight line, ensuring uninterrupted flow and system integrity. These fittings provide a secure, leak-proof connection and are designed for easy installation and removal, making them ideal for maintenance, repairs, or system modifications. Couplings are available in various configurations, allowing them to accommodate different pipe sizes and pressure requirements across industrial sectors. There are several types of couplings commonly used in piping systems. Full couplings are used to join two pipes of the same diameter, while half couplings are designed to connect a pipe to a branch by welding on one end. Reducing couplings allow connection between pipes of different diameters, providing flexibility in pipeline design. Couplings are manufactured in both socket weld and threaded (screwed) ends, facilitating various assembly methods depending on the application.
From a technical standpoint, forged couplings are produced in compliance with stringent international standards such as ASME B16.11 and MSS-SP-83, ensuring uniform quality, durability, and safety. They are available in sizes ranging from 1/8” to 4”, and pressure classes including Class 2000, 3000, 6000, and 9000, suitable for high-pressure environments. Common materials used include Carbon Steel (ASTM A105, A350 LF2), Stainless Steel (ASTM A182 F304, F316), Alloy Steel (ASTM A182 F11, F22, F91), Duplex and Super Duplex Steel, and Nickel Alloys like Inconel and Monel. Precision forging, heat treatment, and machining processes enhance mechanical strength and dimensional accuracy.
Couplings find extensive applications in industries such as oil and gas, petrochemicals, power generation, refineries, and marine engineering. Their robust construction and reliable sealing performance make them suitable for high-pressure and corrosive environments. Whether used in hydraulic systems, chemical processing plants, or offshore rigs, forged couplings offer durability, ease of maintenance, and leak-proof connections, contributing to the safe and efficient operation of complex piping networks.
ASME B16.11 Forged Couplings – Offered in Full and Half Coupling Types with Socket Weld and Threaded Ends – Sizes from 1/8” to 4”, Pressure Classes: 2000, 3000, 6000, 9000 – Designed for durable, high-pressure pipe-to-pipe connections.
Technical Index
Industrial Forged Coupling Standard Specifications
| Forged Coupling Size Availability | 1/2″NB TO 4″NB IN (Threaded & Socket Weld) |
|---|---|
| Pressure Class Ratings | 2000LBS,3000LBS, 6000LBS, 9000LBS |
| Dimensions | ASME B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, MSS-SP-97 |
| DIN | DIN 2986, 2999 |
| BS | BS 3799 |
| Thread | BSPP & BSPT Threads, NPTF & NPT Threads, UNF & UN Threads |
| Types | Half Coupling, Full Coupling, Reducing Coupling |
| Material Grades | Carbon Steel (A105, A350 LF2), Stainless Steel (304/304L, 316/316L), Alloy Steel (F11, F22), Duplex, Super Duplex, Inconel, Monel, Hastelloy |
| Coating / Surface Treatment | Black Paint, Anti-rust Coating, Galvanized, Transparent Oil |
| Ends | Threaded Ends (NPT/BSP), Socket Weld Ends |
| Tolerance | As per ASME B16.11 |
| Testing | PMI, Hydro Test, UT, RT, Visual & Dimensional Inspection |
| Certification | EN 10204 3.1 / 3.2, ISO 9001:2015, PED 2014/68/EU (where applicable) |
| Material Sourcing Regions | India, South Korea, Japan, USA, Germany, Italy |
| Global Export Markets | UAE, Saudi Arabia, Oman, Qatar, Bahrain, Kuwait, USA, Malaysia, Singapore, Egypt, Nigeria, South Africa, Kenya, Ghana, Turkey, Brazil, Mexico |
Industrial Forged Full Coupling Standards
| ASME B16.11 – Forged Steel Fittings, Socket-Welding and Threaded | BS 3799 – Screwed and Socket-Welding for the Petroleum Industry | MSS SP-79 – Socket-Welding Reducer Inserts | MSS SP-83 – Class 3000 Steel Pipe Unions, Socket-Welding and Threaded |
| MSS SP-95 – Swage(d) Nipples and Bull Plugs | MSS SP-97 – Integrally Reinforced Forged Branch Outlet Fittings | DIN 2986 – Threaded Fittings | DIN 2999 – Pipe Threads for Fittings (British Standard Pipe Threads) |
| ISO 49 – Malleable Iron Fittings, Threaded | ISO 7/1 – Pipe Threads Where Pressure-tight Joints Are Made on the Threads | EN 10241 – Steel Threaded Pipe Fittings | JIS B2316 – Japanese standard for forged pipe fittings. |
Forged Socket weld Coupling Material Grades and Standards
| Stainless Steel Forged Coupling | 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 |
|---|---|
| Duplex Steel Forged Coupling | ASTM A182 / ASME SA182 UNS S31803, S32205. Werkstoff No. 1.4462 |
| Super Duplex Steel Forged Coupling | ASTM A182 / ASME SA182 UNS S32750, S32760, S32950. Werkstoff No. 1.4410 |
| Carbon Steel Forged Coupling | ASTM A105/A694/ A350 LF3/A350 LF2: F42, F46, F52, F56, F60, F65, F70 |
| Alloy Steel Forged Coupling | ASTM A182: F1, F5, F9, F11, F22, F91 |
| High Nickel Alloy Forged Coupling | 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) |
| Brass Forged Coupling | Brass CA 360, CA 345 and CA 377 / SAE J530, SAE J531 and ASA |
ASME B16.11 Forged Fittings Types
Forged Socket weld Coupling Industries & Applications
ASME B16.11 Forged Coupling Dimensions
ASME B16.11 Full Coupling Dimensions
| Socket Welding | |||||||
| 3000 | |||||||
| DN | Nom Pipe Size | B(2) | C(1) | D(2) | E(2) | j (Min) | |
| (Avg) | (Min) | ||||||
| 6 | 1/8 | 10.8 | 3.18 | 3.18 | 6.9 | 6.5 | 9.5 |
| 8 | 1/4 | 14.2 | 3.78 | 3.30 | 9.3 | 6.5 | 9.5 |
| 10 | 3/8 | 17.6 | 4.01 | 15.0 | 12.6 | 6.5 | 9.5 |
| 15 | 1/2 | 21.8 | 4.67 | 4.09 | 15.6 | 9.5 | 9.5 |
| 20 | 3/4 | 27.2 | 4.90 | 42.7 | 21.0 | 9.5 | 125 |
| 25 | 1 | 33.9 | 5.69 | 4.98 | 26.7 | 12.5 | 12.5 |
| 32 | 1-1/4 | 42.7 | 6.07 | 5.28 | 35.1 | 12.5 | 12.5 |
| 40 | 1–1/2 | 46.8 | 6.35 | 5.54 | 40.9 | 12.5 | 12.5 |
| 50 | 2 | 61.2 | 6.93 | 6.04 | 52.5 | 19.0 | 16.0 |
| 65 | 2-1/2 | 73.9 | 8.76 | 7.67 | 62.7 | 19.0 | 16.0 |
| 80 | 3 | 89.8 | 9.52 | 8.30 | 78.0 | 19.0 | 16.0 |
| 100 | 4 | 115.2 | 10.69 | 9.35 | 102.3 | 19.0 | 19.0 |
| 6000 | |||||||
| 6 | 1/8 | 10.8 | 3.96 | 3.43 | 4.0 | 6.5 | 9.5 |
| 8 | 1/4 | 14.2 | 4.60 | 401 | 6.4 | 6.5 | 9.5 |
| 10 | 3/8 | 17.6 | 5.03 | 4.37 | 9.2 | 6.5 | 9.5 |
| 15 | 1/2 | 21.8 | 5.97 | 5.18 | 11.8 | 9.5 | 9.5 |
| 20 | 3/4 | 27.2 | 6.96 | 6.04 | 15.6 | 9.5 | 12.5 |
| 25 | 1 | 31.9 | 7.92 | 6.93 | 20.7 | 12.5 | 12.5 |
| 32 | 1-1/4 | 42.7 | 7.92 | 6.93 | 29.5 | 12.5 | 12.5 |
| 40 | 1-1/2 | 46.8 | 6.92 | 17.80 | 34.0 | 12.5 | 12.5 |
| 50 | 2 | 61.2 | 10.92 | 9.50 | 42.9 | 19.0 | 16.0 |
| 9000 | |||||||
| 15 | 1/2 | 21.6 | 9.35 | 8.15 | 6.4 | 9.5 | 9.5 |
| 20 | 3/4 | 27.2 | 9.78 | 8.56 | 11.1 | 9.5 | 12.5 |
| 25 | 1 | 33.9 | 11.38 | 9.96 | 15.2 | 12.5 | 12.5 |
| 32 | 1-1/4 | 42.7 | 12.14 | 10.62 | 22.8 | 12.5 | 12.5 |
| 40 | 1-1/2 | 48.8 | 12.70 | 11.12 | 28.0 | 12.5 | 12.5 |
| 50 | 2 | 61.2 | 13.84 | 12.12 | 38.2 | 19.0 | 16.0 |
Threaded Full Coupling
| Threaded | |||||
| DN | Nom. Pipe Size | Length of Thread. (Min) | w | D | |
| B(*) | L2(*) | ||||
| 3000Lb | |||||
| 6 | 1/8 | 6.4 | 6.7 | 32 | 16 |
| 8 | 1/4 | 8.1 | 10.2 | 35 | 19 |
| 10 | 3/8 | 9.1 | 10.4 | 38 | 22 |
| 15 | 1/2 | 10.9 | 13.6 | 48 | 28 |
| 20 | 3/4 | 12.7 | 13.9 | 51 | 35 |
| 25 | 1 | 14.7 | 17.3 | 60 | 44 |
| 32 | 1-1/4 | 17.0 | 18.4 | 67 | 57 |
| 40 | 1-1/2 | 17.8 | 18.4 | 79 | 64 |
| 50 | 2 | 19.0 | 19.2 | 86 | 76 |
| 65 | 2-1/2 | 23.6 | 28.9 | 92 | 92 |
| 80 | 3 | 25.9 | 30.5 | 108 | 108 |
| 100 | 4 | 27.7 | 33.0 | 121 | 140 |
| 6000Lb | |||||
| 6 | 1/8 | 6.4 | 6.7 | 32 | 22 |
| 8 | 1/4 | 8.1 | 10.2 | 35 | 25 |
| 10 | 3/8 | 9.1 | 10.4 | 38 | 32 |
| 15 | 1/2 | 10.9 | 13.6 | 48 | 38 |
| 20 | 3/4 | 12.7 | 13.9 | 51 | 44 |
| 25 | 1 | 14.7 | 17.3 | 60 | 57 |
| 32 | 1-1/4 | 17.0 | 18.4 | 67 | 64 |
| 40 | 1-1/2 | 17.8 | 18.4 | 79 | 76 |
| 50 | 2 | 19.0 | 19.2 | 86 | 92 |
| 65 | 2-1/2 | 23.6 | 28.9 | 92 | 108 |
| 80 | 3 | 25.9 | 30.5 | 108 | 127 |
| 100 | 4 | 27.7 | 33.0 | 121 | 159 |
| Socket Welding | |||||||
| 3000 | |||||||
| DN | Nom Pipe Size | B(2) | C(1) | D(2) | E(2) | j (Min) | |
| (Avg) | (Min) | ||||||
| 6 | 1/8 | 10.8 | 3.18 | 3.18 | 6.9 | 16.0 | 9.5 |
| 8 | 1/4 | 14.2 | 3.78 | 3.30 | 9.3 | 16.0 | 9.5 |
| 10 | 3/8 | 17.6 | 4.01 | 3.50 | 12.6 | 17.5 | 9.5 |
| 15 | 1/2 | 21.8 | 4.67 | 4.09 | 15.8 | 22.5 | 9.5 |
| 20 | 3/4 | 27.2 | 4.90 | 4.27 | 21.0 | 24.0 | 12.5 |
| 25 | 1 | 33.9 | 5.69 | 4.98 | 26.7 | 28.5 | 12.5 |
| 32 | 1–1/4 | 42.7 | 6.07 | 5.28 | 35.1 | 30.0 | 12.5 |
| 40 | 1–1/2 | 48.8 | 6.35 | 5.54 | 40.9 | 32.0 | 12.5 |
| 50 | 2 | 61.2 | 6.93 | 6.04 | 52.5 | 41.0 | 16.0 |
| 65 | 2-1/2 | 73.9 | 8. 76 | 7.67 | 62.7 | 43.0 | 16.0 |
| 80 | 3 | 89.8 | 9.52 | 8.30 | 77.9 | 44.5 | 16.0 |
| 100 | 4 | 115.2 | 10.69 | 9.35 | 102.3 | 48.0 | 19.0 |
| 6000 | |||||||
| 6 | 1/8 | 10.8 | 3.96 | 3.43 | 4.0 | 16.0 | 9.5 |
| 8 | 1/4 | 14.2 | 4.60 | 4.01 | 6.4 | 16.0 | 9.5 |
| 10 | 3/8 | 17.6 | 5.03 | 4.37 | 9.2 | 17.5 | 9.5 |
| 15 | 1/2 | 21.8 | 5.97 | 5.18 | 11.8 | 22.5 | 9.5 |
| 20 | 3/4 | 27.2 | 6.96 | 6.04 | 15.6 | 24.0 | 12.5 |
| 25 | 1 | 33.9 | 7.92 | 6.93 | 20.7 | 28.5 | 12.5 |
| 32 | 1-1/4 | 42.7 | 7.92 | 6.93 | 29.5 | 30.0 | 12.5 |
| 40 | 1-1/2 | 48.8 | 8.92 | 7.80 | 34.0 | 32.0 | 12.5 |
| 50 | 2 | 61.2 | 10.92 | 9.50 | 42.9 | 41.0 | 16.0 |
| 9000 | |||||||
| 15 | 1/2 | 21.8 | 9.35 | 8.18 | 6.4 | 22.5 | 9.5 |
| 20 | 3/4 | 27.2 | 9.78 | 8.56 | 11.1 | 24.0 | 12.5 |
| 25 | 1 | 33.9 | 11.38 | 9.96 | 15.2 | 28.5 | 12.5 |
| 32 | 1-1/4 | 42.7 | 12.14 | 10.62 | 22.8 | 30.0 | 12.5 |
| 40 | 1-1/2 | 48.8 | 12.70 | 11.12 | 28.0 | 32.0 | 12.5 |
| 50 | 2 | 61.2 | 13.84 | 12.12 | 38.2 | 41.0 | 16.0 |
Threaded Half Coupling
| Threaded | |||||
| DN | Nom. Pipe Size | Length of Thread. (Min) | w | D | |
| B(*) | L2(*) | ||||
| 3000Lb | |||||
| 6 | 1/8 | 6.4 | 6.7 | 32 | 16 |
| 8 | 1/4 | 8.1 | 10.2 | 35 | 19 |
| 10 | 3/8 | 9.1 | 10.4 | 38 | 22 |
| 15 | 1/2 | 10.9 | 13.6 | 48 | 28 |
| 20 | 3/4 | 12.7 | 13.9 | 51 | 35 |
| 25 | 1 | 14.7 | 17.3 | 60 | 44 |
| 32 | 1-1/4 | 17.0 | 18.4 | 67 | 57 |
| 40 | 1-1/2 | 17.8 | 18.4 | 79 | 64 |
| 50 | 2 | 19.0 | 19.2 | 86 | 76 |
| 65 | 2-1/2 | 23.6 | 28.9 | 92 | 92 |
| 80 | 3 | 25.9 | 30.5 | 108 | 108 |
| 100 | 4 | 27.7 | 33.0 | 121 | 140 |
| 6000Lb | |||||
| 6 | 1/8 | 6.4 | 6.7 | 32 | 22 |
| 8 | 1/4 | 8.1 | 10.2 | 35 | 25 |
| 1 0 | 3/8 | 9.1 | 10.4 | 38 | 32 |
| 15 | 1/2 | 10.9 | 13.6 | 48 | 38 |
| 20 | 3/4 | 12.7 | 13.9 | 51 | 44 |
| 25 | 1 | 14.7 | 17.3 | 60 | 57 |
| 32 | 1-1/4 | 17.0 | 18.4 | 67 | 64 |
| 40 | 1-1/2 | 17.8 | 18.4 | 79 | 76 |
| 50 | 2 | 19.0 | 19.2 | 86 | 92 |
| 65 | 2-1/2 | 23.6 | 28.9 | 92 | 108 |
| 80 | 3 | 25.9 | 30.5 | 108 | 127 |
| 100 | 4 | 27.7 | 33.0 | 121 | 159 |
Weight Chart of ANSI B16.11 Forged Coupling
| NOMINAL SIZE |
Couplings App. Weight in KGS | Half Couplings App.Weight in KGS | |||
|---|---|---|---|---|---|
| INCHES | MM | 3000# | 6000# | 3000# | 6000# |
| 1/8" | 6 | 0.05 | 0.10 | 0.02 | 0.04 |
| 1/4" | 8 | 0.05 | 0.10 | 0.03 | 0.05 |
| 3/8" | 10 | 0.06 | 0.12 | 0.03 | 0.06 |
| 1/2" | 15 | 0.14 | 0.37 | 0.07 | 0.19 |
| 3/4" | 20 | 0.20 | 0.45 | 0.11 | 0.23 |
| 1" | 25 | 0.39 | 1.00 | 0.20 | 0.50 |
| 1.1/4" | 32 | 0.73 | 1.65 | 0.37 | 0.83 |
| 1.1/2" | 40 | 1.03 | 1.85 | 0.51 | 0.92 |
| 2" | 50 | 1.35 | 2.80 | 0.66 | 1.40 |
| 2.1/2" | 65 | 2.30 | 4.00 | 1.15 | 2.00 |
| 3" | 80 | 3.15 | 5.50 | 1.57 | 2.75 |
| 4" | 100 | 5.80 | 10.00 | 2.90 | 5.00 |
Major Industrial Forged Threaded Coupling Export Countries
United Arab Emirates (UAE), Jordan, Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United States of America (USA), Singapore, Malaysia, Azerbaijan, Armenia, Georgia, Egypt, Algeria, Nigeria, South Africa, Kenya, Morocco, Ethiopia, Ghana, Tanzania, Sudan, Uganda, Angola.