4. ASME B16.11 Forged steel fittings

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Threaded Hex Head Bushing

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Description

Threaded Hex Head Bushing is a type of threaded pipe fitting, typically made from stainless steel, brass, or carbon steel. The fitting is hexagonal in shape, with one end larger than the other and has both internal and external threads. The larger end has external threads, while the smaller end has internal threads. The hex head allows the use of a wrench or similar tool for easy installation or removal.

Applications

Threaded Hex Head Bushings are commonly used in plumbing and gas systems to connect pipes of different sizes or to convert from one thread type to another. Specific applications include:

Water and gas pipelines: Used to connect water and gas pipes in civil and industrial systems.
Oil and Gas Industry: Used in oil and natural gas pipeline systems.
Chemical industry: Used in chemical piping systems.
HVAC (Heating, Ventilation, and Air Conditioning) system: Used in air conditioning and ventilation systems.

Standards

Threaded Hex Head Bushing must comply with international standards to ensure quality and safety during use. ASME B16.11 standard specifies requirements for product dimensions, materials, strength and accuracy, ensuring that accessories meet the stringent requirements in industrial and civil applications.

Dimensions: Includes outside diameter, inside diameter, thread length, and overall length.
Tolerances: Dimensional tolerances ensure precise fit between fittings and pipes.
Manufacturing materials: Carbon steel, stainless steel, brass and other materials upon request.
Pressure: Specifies the maximum working pressure for each material type and size.
Temperature: Specifies the maximum and minimum working temperature for each material.

Threaded Hex Head Bushing Size and Thickness Chart

Size (inches)	Large outer diameter (A)	Small outer diameter (B)	External thread length (C)	Internal thread length (D)	Overall length (E)	Thickness (F)
1/2 x 1/4	0.84	0.54	0.53	0.45	1.41	0.12
1/2 x 3/8	0.84	0.68	0.53	0.45	1.41	0.12
3/4 x 1/4	1.05	0.54	0.57	0.47	1.69	0.14
3/4 x 3/8	1.05	0.68	0.57	0.47	1.69	0.14
3/4 x 1/2	1.05	0.84	0.57	0.47	1.69	0.14
1 x 1/4	1.31	0.54	0.64	0.53	2.00	0.17
1 x 3/8	1.31	0.68	0.64	0.53	2.00	0.17
1 x 1/2	1.31	0.84	0.64	0.53	2.00	0.17
1 x 3/4	1.31	1.05	0.64	0.53	2.00	0.17
1 1/4 x 1/2	1.66	0.84	0.71	0.55	2.37	0.19
1 1/4 x 3/4	1.66	1.05	0.71	0.55	2.37	0.19
1 1/4 x 1	1.66	1.31	0.71	0.55	2.37	0.19
1 1/2 x 1/2	1.90	0.84	0.75	0.57	2.60	0.22
1 1/2 x 3/4	1.90	1.05	0.75	0.57	2.60	0.22
1 1/2 x 1	1.90	1.31	0.75	0.57	2.60	0.22
1 1/2 x 1 1/4	1.90	1.66	0.75	0.57	2.60	0.22
2 x 1/2	2.38	0.84	0.83	0.63	3.06	0.25
2 x 3/4	2.38	1.05	0.83	0.63	3.06	0.25
2 x 1	2.38	1.31	0.83	0.63	3.06	0.25
2 x 1 1/4	2.38	1.66	0.83	0.63	3.06	0.25
2 x 1 1/2	2.38	1.90	0.83	0.63	3.06	0.25
2 1/2 x 3/4	2.88	1.05	0.92	0.69	3.75	0.30
2 1/2 x 1	2.88	1.31	0.92	0.69	3.75	0.30
2 1/2 x 1 1/4	2.88	1.66	0.92	0.69	3.75	0.30
2 1/2 x 1 1/2	2.88	1.90	0.92	0.69	3.75	0.30
2 1/2 x 2	2.88	2.38	0.92	0.69	3.75	0.30
3 x 1/2	3.50	0.84	1.00	0.75	4.50	0.34
3 x 3/4	3.50	1.05	1.00	0.75	4.50	0.34
3 x 1	3.50	1.31	1.00	0.75	4.50	0.34
3 x 1 1/4	3.50	1.66	1.00	0.75	4.50	0.34
3 x 1 1/2	3.50	1.90	1.00	0.75	4.50	0.34
3 x 2	3.50	2.38	1.00	0.75	4.50	0.34
3 x 2 1/2	3.50	2.88	1.00	0.75	4.50	0.34
4 x 1/2	4.50	0.84	1.09	0.84	5.56	0.38
4 x 3/4	4.50	1.05	1.09	0.84	5.56	0.38
4 x 1	4.50	1.31	1.09	0.84	5.56	0.38
4 x 1 1/4	4.50	1.66	1.09	0.84	5.56	0.38
4 x 1 1/2	4.50	1.90	1.09	0.84	5.56	0.38
4 x 2	4.50	2.38	1.09	0.84	5.56	0.38
4 x 2 1/2	4.50	2.88	1.09	0.84	5.56	0.38
4 x 3	4.50	3.50	1.09	0.84	5.56	0.38

Threaded Hex Head Bushing Material Summary Table

Material Type	Brief description	Main application	Material code according to ASME B16.11
Carbon steel	Steel has high carbon content, durable, strong, reasonable price	Piping systems for water, gas, oil, and industrial applications	ASTM A105 / A105N
Stainless Steel	High corrosion resistance, good mechanical strength	Chemical, food, pharmaceutical, harsh environment industries	ASTM A182 F304/F316
Brass	Corrosion resistant, easy to process, aesthetic	Plumbing systems, air conditioning systems, civil applications	ASTM B62
Nickel alloy	High corrosion resistance, high temperature resistance	Oil and gas, chemical, harsh environment industry	ASTM B564
Copper alloy	Good corrosion resistance, good mechanical strength	Seawater systems, marine industry	ASTM B148
Alloy steel	High durability, resistant to high temperature and pressure	Oil and gas industry, high pressure applications	ASTM A182 F5/F9/F11