PVCu Flanges

Effast PVCu flanges offer a robust and secure method of creating demountable joints in pressure pipework systems. Available in sizes from ½″ to 8″, this flange range includes full sets (with gaskets, backing rings, and bolt kits) or individual components, allowing for flexible installation depending on system requirements. Manufactured from high-quality unplasticised polyvinyl chloride, these fittings are WRAS and BSI Kitemark approved, ensuring suitability for potable water and industrial fluid systems.

Note: Not suitable for use with compressed air.

• Size Range: 1/2″ to 8″
• Pressure Rating:
  – Up to 6″: 15 bar at 20°C
  – Above 6″: 9 bar at 20°C
• Operating Temperature: 5°C to 60°C
• Connection Type:
  – Flanged, typically used with backing rings, gaskets, and bolt sets
• Approvals:
  – WRAS Approved (Approval No. 1705080)
  – BSI Kitemark Certified (Licence No. KM60041)
• Standards: Compatible with BS EN 1092-1 PN10/16 and other common flange drilling patterns

Solvent Weld the Flange
– For plain-end flanges, solvent weld to the pipe using Effast PVCu cement. Follow jointing best practices (clean, abrade, MEK clean, cement, insert, and hold).
– Allow up to 24 hours curing before applying pressure.

Prepare for Assembly
– Ensure all flange faces are flat, clean, and free from debris.
– Place the gasket centrally between the two flanged ends.

Align and Assemble
– Position the backing ring over the flange.
– Insert bolts through aligned holes and hand-tighten nuts evenly.

Tighten the Bolts
– Use a star (cross) pattern to incrementally tighten bolts, ensuring even pressure across the gasket.
– Avoid overtightening, particularly on plastic components.

Final Check
– Confirm that the gasket is properly seated and that no distortion or misalignment has occurred.
– Once secure, pressure test the system to 1.5x its rated operating pressure.