ASTM A106 is a standard specification for seamless carbon steel pipes used in high-temperature services. It covers grades A, B, and C, with Grade B and Grade C being the most commonly used grades.

ASTM A106 GR. B (Grade B) Pipes: ASTM A106 Gr B pipes are seamless carbon steel pipes designed for high-temperature applications. They are commonly used in refineries, power plants, boilers, and other industries where elevated temperatures and pressure conditions exist. Grade B pipes have a minimum tensile strength of 60,000 psi (415 MPa) and a minimum yield strength of 35,000 psi (240 MPa). They are suitable for bending, flanging, and similar forming operations.

ASTM A106 GR. C (Grade C) Pipes: ASTM A106 Gr C pipes are also seamless carbon steel pipes used in high-temperature services. Grade C pipes have a higher carbon content compared to Grade B pipes, which increases their strength and hardness. They have a minimum tensile strength of 70,000 psi (485 MPa) and a minimum yield strength of 40,000 psi (275 MPa). Grade C pipes are typically used in applications that require higher strength and resistance to mechanical stresses.

Both ASTM A106 Grade B and Grade C pipes are widely used for conveying fluids and gases at high temperatures and pressures. They are suitable for various industries, including oil and gas, petrochemical, power generation, and process piping.

When selecting between ASTM A106 Grade B and Grade C pipes, factors such as the required mechanical properties, temperature range, and specific application requirements should be considered.

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