ANSI Class 300 Flange

ANSI Class 300 flanges are flanges with a pressure rating of 300 according to the American National Standards Institute (ANSI) standard. At room temperature, ANSI Class 300 flanges have a rated operating pressure of approximately 580 LBF per square inch (psi), equivalent to 4.0 MPa. It is often used in industrial piping systems to achieve reliable connections between pipes and between pipes and equipment.

Overview

Main differences between ANSI Class 300 flanges and Class 150 flanges:

1. Pressure level:

Class 150 flanges have a rated working pressure of about 1.0 MPa at room temperature.

The rated working pressure of the Class 300 flange at room temperature is about 4.0MPa, which is significantly higher than that of the Class 150 flange.

2. Size specifications:

With the increase of the pressure level, the outside diameter of the Class 300 flange, the center circle diameter of the bolt hole, the number and size of the bolt hole, and the thickness of the flange are usually larger than that of the Class 150 flange.

3. Bolt specifications and quantity:

Class 300 flanges typically require larger sizes and a larger number of bolts to ensure the strength and tightness of the connection.

4. Application Scenario:

The Class 150 flanges are suitable for lower pressure piping systems.

The Class 300 flanges are used in piping systems with higher pressure and higher requirements for tightness and strength.

5. Material requirements:

Due to the different pressures, the strength and performance requirements of the material for Class 300 flanges are usually higher than those for Class 150 flanges.

Drawing

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