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4. ASME B16.11 Forged steel fittings

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.

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