CPVC VAN STONE FLANGE

CPVC van stone flanges use a loose-flange (van stone) design, allowing the flange ring to rotate independently of the stub end welded or bonded to the pipe, which simplifies bolt-hole alignment during installation of CPVC piping systems.

Key specifications:
• Manufactured to DIN and GB standards, with flange face compatibility across ANSI 150#, DIN PN10, JIS 10K, and ISO standards for cross-standard installation flexibility.
• A loose (van stone) flange ring design allows the bolt holes to be rotated into alignment with the mating flange after the stub end is fixed to the pipe, removing the need to precisely orient the pipe during fusion or bonding.
• Socket and fusion connection options attach the stub end securely to CPVC pipe, matching the elevated temperature rating CPVC is chosen for.
• Water absorption below 0.01% and contraction percentage below 0.4% support long-term dimensional stability under sustained service.
• Tensile strength of 41-50 MPa delivers the mechanical strength required for bolted connections under standard flange pressure ratings.
• Available across DN15 to DN300, with a flat face sealing surface rated PN10.

The rotating flange ring is a particular installation advantage on longer pipe runs or where the stub end orientation is difficult to control precisely during fusion welding, since bolt-hole alignment can be corrected after the joint is made rather than requiring perfect alignment beforehand.

Typical applications include CPVC process and hot water piping systems where ease of bolt-hole alignment during installation reduces field labor and installation errors.