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4. ASME B16.11 Forged steel fittings

Socket Welding Half Coupling

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Description

Socket Welding Half Coupling is a type of pipe fitting used to connect one section of pipe to another part of the piping system. Unlike a full coupling, a half coupling has only one end designed for socket welding, while the other end can be a socket or threaded connection.

Applications

Socket Welding Half Coupling is widely used in industries such as:

  • Oil and gas : Connecting oil and gas pipelines to equipment or other systems
  • Chemical : Piping systems in chemical plants
  • Food and pharmaceuticals : Clean piping systems
  • Water supply and drainage : Industrial and civil water supply and drainage systems
  • Shipbuilding : Piping systems in shipbuilding industry

Standards

ASME B16.11 : This standard specifies the material, design, dimensional, tolerance, and inspection requirements for socket weld pipe fittings, including tees, elbows, unions, couplings, caps, plugs, bushings, and reducers.

  • Material : Stainless steel, carbon steel, alloy, brass
  • Size : From 1/8 inch to 4 inch
  • Operating pressure : Up to 3000 psi (pounds per square inch)
  • Standard : ASME B16.11, BS 3799
  • Structure : One socket end and one open or threaded end

Socket Welding Half Coupling Dimensions and Thickness Table (according to ASME B16.11)

Nominal Size (NPS) Outer diameter (D) Overall length (O) Average thickness (t) Socket diameter (S) Socket depth (E)
1/2 inch 21.34mm 33mm 4.85mm 15.75mm 13.59mm
3/4 inch 26.67 mm 38mm 4.85mm 20.93 mm 13.59mm
1 inch 33.40 mm 44mm 5.08mm 26.67 mm 17.02mm
1-1/4 inches 42.16mm 48mm 5.69 mm 35.05mm 17.02mm
1-1/2 inches 48.26 mm 51mm 6.02mm 40.89 mm 17.02mm
2 inches 60.33 mm 60mm 6.55mm 52.63 mm 22.23 mm
2-1/2 inches 73.03 mm 67mm 7.14 mm 62.71 mm 22.23 mm
3 inches 88.90 mm 79mm 7.62 mm 77.93 mm 25.40mm
4 inches 114.30 mm 95mm 8.64 mm 102.26 mm 25.40mm

Note:

  • Outer diameter (D) : Outer diameter of the pipe.
  • Overall length (O) : Total length of half coupling.
  • Average thickness (t) : Thickness of material at thickest point.
  • Socket diameter (S) : Inner diameter of socket.
  • Socket depth (E) : Depth of the socket section.

Socket Welding Half Coupling Material Summary

Material Standard Main ingredient Main application
Stainless Steel ASTM A182 F304/316 Fe, Cr, Ni Oil and gas, chemicals, food and pharmaceuticals
Carbon steel ASTM A105 Fe, C Oil and gas, water supply and drainage, shipbuilding
Alloy steel ASTM A182 F5, F9 Fe, Cr, Mo Thermal power, chemical, heavy industry
Brass ASTM B62 Cu, Zn Plumbing, HVAC, Cooling System
Copper-nickel alloy ASTM B151 C70600 Cu, Ni Shipbuilding, cooling systems, marine industry

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