4. ASME B16.11 Forged steel fittings

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Threaded Tee

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Description

Threaded Tee is a type of pipe fitting used to join three pieces of pipe together, forming a T shape. This fitting has internal threads on all three ends, making it easy to connect to pipes with external threads. They are typically made from materials such as stainless steel, carbon steel, copper, or plastic, and come in a variety of sizes to suit specific applications.

Application

Plumbing Systems: Threaded Tee is used to divide or connect pipes in a plumbing system, helping to direct the flow of water or other liquids.
Air Conditioning Systems: In HVAC (Heating, Ventilation, and Air Conditioning) systems, Threaded Tee helps distribute air flow or refrigerant to different parts of the system.
Oil and gas industry: Used to connect pipelines transporting oil, gas and petrochemical products.
Chemical industry: Suitable for the transportation and handling of chemicals, ensuring safety and efficiency.

Standards

ASME B16.11 is an American Society of Mechanical Engineers (ASME) standard dealing with threaded and butt-welded pipe fittings for pressure applications, including elbows, tees, couplings, and caps.

Material: Stainless steel, carbon steel, steel alloy

Size: Threaded Tees are manufactured in standard sizes from 1/8 inch to 4 inches. Specific dimensions include: outside diameter, wall thickness, length, and inside diameter.

Pressure and Temperature: ASME B16.11 fittings are designed to withstand high pressures, typically applicable to systems with nominal pressures from Class 2000 to Class 9000.

Threaded Tee Dimensions and Thickness Chart According to ASME B16.11

Nominal Size (NPS)	Outside diameter (OD) (inch)	Thread diameter (T) (inch)	Branch length (C) (inches)	Overall Length (M) (inches)	Main length (B) (inches)	Thickness (inches)
1/2	0.84	0.50	1.68	2.72	1.05	0.147
3/4	1.05	0.75	2.04	3.00	1.27	0.154
1	1.32	1.00	2.36	3.36	1.52	0.179
1 1/4	1.66	1.25	2.68	3.64	1.68	0.191
1 1/2	1.90	1.50	3.00	3.96	1.90	0.200
2	2.38	2.00	3.68	4.52	2.27	0.218
2 1/2	2.88	2.50	4.40	5.16	2.72	0.254
3	3.50	3.00	5.00	5.64	3.24	0.270
4	4.50	4.00	6.72	6.88	3.84	0.338

Note:

Nominal Size (NPS): This is the nominal size of the pipe, commonly used to determine the size of the fitting.
Outside Diameter (OD): The outside diameter of the fitting.
Thread diameter (T): Diameter of the internal thread portion of the fitting.
Branch Length (C): Length of branch from center to thread end.
Overall Length (M): Overall length from one end of the accessory to the other.
Main length (B): Length of main part from center to thread end.
Thickness (inch): Thickness of the pipe wall.

Threaded Tee Material Summary

Material Type	Standard	Main ingredient	Characteristic	Main Applications
Carbon steel	ASTM A105	Carbon	High pressure, low cost	Oil and gas, chemical, water supply and drainage systems
	ASTM A350 LF2	Carbon	Low temperature resistance	Low temperature applications
Stainless Steel	ASTM A182 F304/F304L	Chrome, Nickel	Corrosion resistant, high durability	Chemical, food, pharmaceutical industry
	ASTM A182 F316/F316L	Chrome, Nickel, Mo	Higher corrosion resistance, high temperature resistance	Highly corrosive environments
Alloy steel	ASTM A182 F11	Chrome, Molybdenum	High temperature resistance, good durability	Oil and gas industry, thermal power
	ASTM A182 F22	Chrome, Molybdenum	Higher temperature resistance, corrosion resistance	Thermal and chemical systems
Nickel Alloy	ASTM B564 UNS N04400 (Monel)	Nickel, Copper	Excellent corrosion resistance, especially in sea water	Marine and petrochemical industry
Brass	ASTM B62	Copper, Tin	Anti-corrosion, good thermal conductivity	Water system, cooling system
Inconel Alloy	ASTM B564 UNS N06625	Nickel, Chromium, Mo	High temperature resistance, anti-oxidation	Aviation and chemical industry
Hastelloy Alloy	ASTM B564 UNS N10276	Nickel, Mo, Chromium	High corrosion resistance, high temperature and pressure resistance	Chemical and petroleum industry

Note:

Standards: The respective ASTM standards define the chemical composition and mechanical properties of the material.
Major Components: The main elements in the chemical composition of the material.
Properties: The outstanding characteristics of the material such as pressure resistance, corrosion resistance, and durability.
Main Applications: Common industries and applications of each material.