4. ASME B16.11 Forged steel fittings

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Threaded Elbow 45°

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Description

Threaded Elbow 45° is an internally threaded pipe fitting designed to connect pipe sections together at a 45 degree angle. This fitting is usually made from materials such as stainless steel, carbon steel, copper, or alloys to ensure durability and high pressure resistance.

Applications

Water supply system : Often used in water supply and drainage systems to regulate the flow direction of water.
Pneumatic systems : Used in pneumatic systems to redirect air flow.
Petroleum systems : Used in petroleum transportation systems to regulate the flow direction of petroleum liquids and gases.
Chemical industry : Applied in chemical transfer systems, ensuring safety and efficiency in diverting the flow of chemicals.

Standards

ASME B16.11 is a standard developed by the American Society of Mechanical Engineers (ASME) for threaded pipe fittings, including 45° elbows. This standard specifies the dimensional, material, design, and testing requirements for pipe fittings in high-pressure systems.

Scope of application : Applicable to threaded fittings used in pressure piping systems. Including fittings such as elbow, tee, coupling, cap, union, and boss.

Size: from 1/8 inch to 4 inch.

Tolerances: on size, thickness and length are specified to ensure consistency and ease of assembly.

Materials: Materials used include carbon steel, alloy steel, stainless steel and copper.

Threaded Elbow 45° Dimensions and Thickness Chart according to ASME B16.11 (NPS 1/2 inch to 4 inch)

NPS (inches)	DN (mm)	Outside diameter (OD) (inch)	Length (L1) (inches)	Length (L2) (inches)	Thickness (S) (inch)
1/2	15	0.84	0.75	0.88	0.109
3/4	20	1.05	0.88	1.05	0.113
1	25	1.32	1.00	1.25	0.133
1 1/4	32	1.66	1.25	1.50	0.140
1 1/2	40	1.90	1.50	1.75	0.145
2	50	2.38	1.88	2.00	0.154
2 1/2	65	2.88	2.25	2.25	0.203
3	80	3.50	2.63	2.50	0.216
4	100	4.50	3.13	2.75	0.237

Threaded Elbow 45° Dimensions and Thicknesses Chart by Other Standards (NPS 5 inch to 24 inch)

NPS (inches)	DN (mm)	Outside diameter (OD) (inch)	Length (L1) (inches)	Length (L2) (inches)	Thickness (S) (inch)
5	125	5.56	3.50	3.00	0.258
6	150	6.63	3.88	3.25	0.280
8	200	8.63	4.50	3.50	0.322
10	250	10.75	5.38	4.00	0.365
12	300	12.75	6.25	4.50	0.406
14	350	14.00	6.75	4.75	0.438
16	400	16.00	7.50	5.00	0.500
18	450	18.00	8.50	5.50	0.562
20	500	20.00	9.50	6.00	0.593
24	600	24.00	11.50	6.50	0.687

Note:

NPS (Nominal Pipe Size) : Nominal size of pipe.
DN (Diameter Nominal) : Nominal diameter, equivalent to NPS but in metric.
Outside diameter (OD) : Outside diameter of the pipe.
Length (L1, L2) : Length of pipe section from connection point to end point of elbow.
Thickness (S) : Pipe wall thickness .

Material Summary Table of Threaded Elbow 45°

Material	Describe	ASTM/ASME Standards	Application
Carbon steel	Durable, low cost, high pressure resistant material.	ASTM A105	Used in petroleum, chemical, and water systems.
Alloy steel	Contains alloying elements such as chrome, molybdenum for increased strength and heat resistance.	ASTM A182 F11, F22	Used in high temperature and high pressure systems such as boilers, power plants.
Stainless Steel	Anti-corrosion, good heat resistance, high durability.	ASTM A182 F304, F316	Used in systems requiring high hygiene and corrosion resistance such as food, pharmaceutical, and chemical.
Brass/Bronze	Good corrosion resistance, easy to process, good thermal and electrical conductivity.	ASTM B62	Used in water supply and drainage systems, air conditioning systems, and applications requiring good electrical and thermal conductivity.
Cast iron	Low cost, easy to cast, good corrosion resistance.	ASTM A126	Used in water supply and drainage systems, industry and non-high pressure systems.
Nickel Alloy	Excellent corrosion resistance, high heat resistance.	ASTM B564 UNS N06625 (Inconel 625), UNS N08825 (Incoloy 825)	Used in highly corrosive, high temperature environments such as chemical, marine, and oil and gas industries.
Titanium	Light, durable, good corrosion resistance, high temperature resistance.	ASTM B381	Used in aviation, marine, chemical industries.
Aluminum alloy	Light, good corrosion resistance, easy to process.	ASTM B361	Used in the aerospace, transportation, and systems requiring light weight and corrosion resistance.

Note:

ASTM/ASME : Technical standards specified by ASTM (American Society for Testing and Materials) and ASME (American Society of Mechanical Engineers).
Applications : Industries and systems commonly used for each material.