ASTM A106 Cold Drawn Seamless Carbon Steel Pipe For High-Temperature Service

ASTM A106 is a specification for seamless carbon steel pipe for high-temperature service. This specification covers pipes sized from NPS 1/8 to NPS 48 and includes material grades A, B, and C. In this article, we will explore the material, specification, chemical composition, mechanical properties, steel grade, and applications of ASTM A106 pipes.

Material

The material used in ASTM A106 pipes is seamless carbon steel. This type of steel is produced by drawing solid billets through a piercing rod and then heating the hollow cylinder to create a seamless tube. This process gives the steel improved strength and allows for better resistance to high temperatures.

Specification

The ASTM A106 specification covers seamless carbon steel pipes for high-temperature service. The pipes must be produced in the following sizes:

• NPS 1/8 to NPS 48
• Schedule 10 to Schedule 160
• SRL, DRL, or cut-to-length

The pipes must also conform to the following requirements:

• Chemical composition
• Tensile properties
• Hardness
• Flattening test
• Hydrostatic test

Chemical Composition

The chemical composition of ASTM A106 pipes varies depending on the grade of material. The following table shows the maximum composition limits for grades A, B, and C.

Mechanical Properties

The mechanical properties of ASTM A106 pipes are also dependent on the grade of material. The following table shows the minimum tensile and yield strength requirements for grades A, B, and C.

Steel Grade

The steel grade of ASTM A106 pipes refers to the material's chemical composition and mechanical properties. The grades are identified by a letter and a number, with the letter indicating the type of steel and the number indicating the minimum tensile strength in MPa. The three grades of material used in ASTM A106 pipes are:

• Grade A: 330 MPa minimum tensile strength
• Grade B: 415 MPa minimum tensile strength
• Grade C: 485 MPa minimum tensile strength

• Application

  ASTM A106 pipes are widely used in high-temperature applications such as oil and gas refineries, power plants, boilers, and petrochemical plants. These pipes are designed to withstand high temperatures and pressure, making them ideal for transporting hot fluids and gases.

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