PVC-U/C Lap Joint Flange for Industry

Key Features

• Lap joint design: flange ring rotates freely for precise bolt hole alignment.
• Solvent cement connection: stub end permanently bonded to PVC-U/C pipe via solvent cement.
• Detachable: flanged bolted connection allows easy maintenance and replacement of valves or equipment.
• Corrosion resistant: fluid contacts only PVC-U/C stub end; flange ring can be metal.

Manufacturing Process

Stub end injection molded from PVC-U/C; flange ring can be PVC-U/C, PP, or metal (carbon steel, stainless steel). Flange ring slides over the stub end and presses against the back of the flare.

Critical Process Parameters

• Precise stub end socket machining.
• Flatness and perpendicularity control of flare face against flange ring contact surface.
• Flange ring bolt circle and hole diameter conform to standards.

Raw Material Characteristics

• Stub end: PVC-U or PVC-C
• Flange ring: PVC-U/C, PP, or metal (galvanized carbon steel, stainless steel)
• Gasket: EPDM
• PVC-U suitable ≤60°C; PVC-C suitable ≤93°C

Typical Applications

• Connection between chemical piping and metal flanged valves.
• Connection to flanged equipment such as corrosion-resistant pumps and filters.
• Transition connections between plastic pipes and metal pipes or dissimilar plastic pipes.

Application Scenarios

• Connection of PVC-U/C piping to pump inlets/outlets in pump rooms.
• Installation of metal flanged valves on chemical piping.