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.

Technical Specification

  • 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

Installation Overview

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.

IMPORTANT: The technical data given on this website is for preliminary information purposes only and is published without guarantee. All line drawings are for illustrative purposes only and should not be regarded as wholly accurate in every detail. We reserve the right to withdraw or to alter the specification of any product without notice. For more information, please consult our Terms of Business.

If you require any further information, our excellent customer service team is here to help so please call us on 01794 835835.

 

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