4. ASME B16.11 Forged steel fittings

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Socket Welding Cap

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Description

Socket Welding Cap is a type of fitting used in a piping system to seal the end of a pipe, preventing the flow of liquid or gas. It is shaped like a cap and is designed to be installed by spot welding.

Applications

Oil and gas piping systems: Used to seal pipe ends, prevent leaks and protect the system from external agents.
Chemical Industry: Protects chemical piping systems from environmental impacts.
HVAC (Heating, Ventilation, and Air Conditioning) Systems: Ensure that air conditioning systems operate efficiently without leaks.
Food and beverage industry: Used in production and distribution systems to ensure food hygiene and safety.

Standards

ASME B16.11: This is an American National Standards Institute (ASME) standard that specifies the dimensions and technical requirements for spot weld fittings, including covers.

Size (NPS) : Includes sizes from 1/8 inch to 4 inches.
Overall Length: Specified to ensure consistency in installation and use.
Outside and inside diameters: Guaranteed to fit standard pipe sizes.
Materials: Carbon steel, stainless steel, nickel alloy, and several other materials.
Pressure: Depends on the material and size of the fitting. Fittings are designed to withstand high pressures in industrial systems.

Socket Welding Cap Size and Thickness Chart from 1/2 inch to 24 inch

ASME B16.11 Standard

Nominal Size (NPS)	Outside diameter (OD) (inch)	Overall Length (L) (inches)	Wall Thickness (T) (inch)
1/2	0.84	1.25	0.109
3/4	1.05	1.50	0.113
1	1.32	1.75	0.133
1 1/4	1.66	2.00	0.140
1 1/2	1.90	2.25	0.145
2	2.38	2.50	0.154
2 1/2	2.88	2.75	0.203
3	3.50	3.00	0.216
3 1/2	4.00	3.25	0.226
4	4.50	3.50	0.237
5	5.56	3.75	0.258
6	6.63	4.00	0.280
8	8.63	4.25	0.322
10	10.75	4.50	0.365
12	12.75	4.75	0.375
14	14.00	5.00	0.375
16	16.00	5.25	0.375
18	18.00	5.50	0.375
20	20.00	5.75	0.375
24	24.00	6.00	0.375

Note:

Outside Diameter (OD) : Outside diameter of the cover.
Overall Length (L) : Overall length of the cover from the weld point to the outer edge.
Wall Thickness (T) : Thickness of the cover wall.

Socket Welding Cap Material Summary

Material Type	Material Standards	Application	Characteristic
Carbon steel	ASTM A105	High pressure piping system	High durability, good pressure resistance
Stainless Steel	ASTM A182 (F304, F316)	Chemical, food, pharmaceutical industry	Corrosion resistant, easy to clean
Steel Alloy	ASTM A182 (F11, F22)	High temperature, high pressure applications	Withstand high temperature and pressure
Copper and Copper Alloys	ASTM B61, B62	Water, oil, gas pipeline system	Corrosion resistant, good thermal and electrical conductivity
Nickel Alloy Steel	ASTM B564 (Inconel 600, 625)	Applications in harsh environments	Strong corrosion resistance, high heat resistance
Duplex Stainless Steel	ASTM A182 (F51, F53)	Applications in marine environment	Good corrosion resistance and strength
Super Duplex Stainless Steel	ASTM A182 (F55)	Applications in extremely corrosive environments	High corrosion resistance, high durability