What are the selection criteria for fan method?

The selection of fan flanges requires comprehensive consideration of six core elements: nominal pressure, pipeline diameter, working temperature, medium properties, installation conditions, and industry standards. The specific standards are as follows:

1、 Nominal pressure matching

Pressure level selection

Select the nominal pressure rating of the flange based on the design pressure of the pipeline system.

2、 Pipeline nominal diameter adaptation

Standardization of dimensions

The flange diameter needs to match the nominal diameter of the pipeline to ensure the sealing of the connection.

3、 Adaptability to working temperature

High temperature working conditions

Material selection: Priority should be given to heat-resistant steel or alloy steel to avoid creep or oxidation of ordinary carbon steel.

Sealing design: Use metal wrapped gaskets or graphite composite gaskets to prevent gasket hardening and leakage.

Thermal expansion compensation: Long distance high-temperature pipelines need to reserve thermal expansion gaps or use expansion joints and flange connections.

low-temperature conditions

Material selection: Avoid carbon steel and prioritize austenitic stainless steel or aluminum flanges.

Sealing design: Use PTFE gaskets or metal O-rings with good low-temperature elasticity.

Anti brittle fracture measures: The flange structure avoids sharp corners and reduces stress concentration.