Description

Stainless Steel Socket Weld Full Couplings, Stainless Steel 304 Weld Couplings, Stainless Steel 316 Couplings

Stainless Steel Socket Weld Full Couplings from Stainless Steel Fittings India are forged fittings with a socket at each end, used to join two lengths of pipe of the same size in a straight run. Manufactured to ASME B16.11 in class 3000#, 6000# and 9000#, our SS full couplings deliver strong, leak-proof, high-pressure joints with excellent corrosion resistance. Available in socket weld (S/W) and threaded ends and priced from US$8.90 per kg, they are stocked in grades 304, 304L, 316 and 316L, with duplex and nickel alloys available on request.

Socket Weld Full Coupling Specifications

Material Grades

Stainless Steel: ASTM A182 F304, F304H, F304L, F304LN, F316, F316H, F316L, F316LN, F316Ti, F309, F310, F317L, F321, F347 and 904L.

Duplex & Super Duplex: ASTM A182 F51, F53, F55 (UNS S31803, S32750, S32760).

Nickel Alloys: Inconel 600 / 625 / 825, Monel 400 / K500, Hastelloy C276 / C22, Alloy 20 and Titanium.

Full Coupling vs Half Coupling

A full coupling has two sockets and joins two pipes end to end in a straight line. A half coupling has a single socket and is used to create a branch or small-bore take-off from a run pipe, vessel or tank. Choose a full coupling whenever two pipe lengths of the same nominal size need to be connected.

Features & Advantages

• Two-socket design for fast, leak-proof pipe-to-pipe joints
• High-pressure socket weld construction (up to class 9000#)
• Superior corrosion, oxidation and scaling resistance
• Forged for strength, density and dimensional accuracy
• Supplied with EN 10204 3.1 material test certificates

Applications

Oil & gas, petrochemical and chemical processing, refineries, power and nuclear plants, fertilizer and paper mills, pharmaceutical, shipbuilding, desalination, water treatment and instrumentation piping.

Stainless Steel Socket Weld Full Couplings – Frequently Asked Questions

1. What is a stainless steel socket weld full coupling?

A stainless steel socket weld full coupling is a forged fitting with a socket at each end. Two pipe ends are inserted into the sockets and fillet welded, joining two lengths of pipe of the same size in a straight run.

2. What is the difference between a full coupling and a half coupling?

A full coupling has two sockets and joins two pipes together, while a half coupling has a single socket on one side and is used to connect a pipe to a vessel, tank or larger pipe as a branch outlet.

3. Which standard applies to socket weld full couplings?

Our socket weld full couplings are manufactured to ASME B16.11, with reference to MSS-SP-79 and BS 3799 for forged socket weld and threaded fittings.

4. What sizes of full couplings are available?

Standard sizes range from 1/2 inch NB to 4 inch NB (15 NB to 100 NB). Custom sizes can be produced on request.

5. What pressure classes do you offer?

We supply class 3000#, 6000# and 9000# (LBS) full couplings, selected to match the working pressure of your piping system.

6. Which stainless steel grades are used?

We stock ASTM A182 grades F304, F304L, F316 and F316L, and can supply 304H, 316H, 316Ti, 321, 347, 904L, duplex and nickel alloys on request.

7. What end connections are available?

Full couplings are available with socket weld (S/W) ends and screwed or threaded ends in NPT, BSP or BSPT.

8. What is the price of stainless steel socket weld full couplings?

Our stainless steel socket weld full couplings start at US$8.90 per kg. Final pricing depends on grade, size, class and quantity.

9. Are these couplings forged or cast?

They are forged fittings, giving them high mechanical strength, a dense grain structure and excellent pressure integrity.

10. How is a socket weld full coupling installed?

The pipe ends are inserted into both sockets, withdrawn about 1.6 mm to allow for thermal expansion, and then fillet welded around each socket for a leak-proof joint.

11. What is a reducing full coupling?

A reducing full coupling has two sockets of different sizes, allowing two pipes of different diameters to be joined in a straight run.

12. Which industries use socket weld full couplings?

They are used in oil and gas, petrochemical, chemical, refinery, power, nuclear, fertilizer, paper, pharmaceutical, shipbuilding and water treatment piping systems.

13. Do you provide material test certificates?

Yes. Every consignment is supplied with EN 10204 3.1 mill test certificates confirming chemical composition and mechanical properties.

14. What surface finish is provided?

Standard finishes include pickled and passivated; polished or electro-polished finishes are available on request.

15. Can you supply special grades such as duplex or nickel alloy?

Yes. We manufacture full couplings in duplex, super duplex, Inconel, Monel, Hastelloy, Alloy 20 and titanium to order.

16. How are the couplings marked for traceability?

Each coupling is marked with the manufacturer, material grade, heat number, size and pressure class for full traceability.

17. Do you export and how are the couplings packed?

Yes, we export worldwide. Couplings are packed in wooden boxes or cartons to ensure safe, damage-free international delivery.