4. ASME B16.11 Forged steel fittings

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Socket Welding Union

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Description

Socket Welding Union is a type of pipe fitting used to connect two pieces of pipe or tubing to other equipment in a piping system. They are designed to provide a secure and removable connection, making them easy to install and maintain.

Applications

Socket Welding Union is widely used in industries such as:

Oil and gas : Connecting oil and gas pipelines
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
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 : Consists of 3 parts – male connector, female connector, and connecting ring (nut)

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

Nominal Size (NPS)	Outer diameter (D)	Overall height (L)	Average thickness (t)
1/2 inch	21.34mm	65mm	3.73 mm
3/4 inch	26.67 mm	68mm	3.91 mm
1 inch	33.40 mm	75mm	4.55mm
1-1/4 inches	42.16mm	83 mm	4.85mm
1-1/2 inches	48.26 mm	90 mm	5.08mm
2 inches	60.33 mm	100mm	5.54 mm
2-1/2 inches	73.03 mm	120mm	7.01 mm
3 inches	88.90 mm	135 mm	7.62 mm
4 inches	114.30 mm	155 mm	8.56 mm

Note:

Outer diameter (D) : Outer diameter of the pipe.
Overall Height (L) : Total height of the union from male connector to female connector.
Average thickness (t) : Thickness of material at thickest point.

Socket Welding Union 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