Flanged joints are a common type of connection method for coated steel pipes, consisting of a pair of flanges, connecting gaskets, and several bolts and nuts.

Flange connection applicable bore range: ≥DN15

National Standard Flanged Socket Weld Pressure Range: PN2.5 - PN40

Bolted Flange Advantages and Features

Strong mechanical and sealing properties.

2. Applicable pipe diameter range: Suitable for pipes with DN50 or greater.

3. No welding required, easy installation, and saves construction time. Especially for coal mine use, plastic-coated steel pipes, where electrical sparks are not permitted in the construction environment, flanged connections are particularly suitable for in-mine connections.

4. The construction process will not damage the coating, and the maintenance is simple with easy disassembly during maintenance.

Flange Connection Process

1. Shot blasting and rust removal treatment for steel pipes.

2. Weld flanges to both ends of the steel pipe.

3. Heat the steel pipe for flange connection.

4. Plastic-coated internal and external processing for flanged steel pipes.

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