Threaded Fixed Flange Rp PVC-U PN 16

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The PVC-U threaded fixed flange with Rp parallel internal thread is an integral transition component engineered for rigid connections between flanged industrial equipment and threaded piping lines. Manufactured from high-grade unplasticised polyvinyl chloride (PVC-U) in accordance with EN ISO 1452 standards, this fitting incorporates a solid flange collar and an axially aligned female threaded hub into a single monolithic moulding. Designed for parallel female threads conforming to EN 10226-1 and ISO 7-1, it enables direct mechanical coupling of valves, pumps, flow instrumentation, and tank connections without requiring separate backing rings or solvent cement joints. BigWeld supplies this component across Europe as an authorised Georg Fischer distributor, guaranteeing verified industrial quality and precision dimensional tolerances across the entire nominal range from 1/2 inch to 4 inches.

Rated for an operating pressure of PN 16 bar at a reference medium temperature of 20 degrees Celsius, the flange provides dependable mechanical stability under sustained hydrostatic load. PVC-U exhibits extensive chemical resistance against inorganic acids, alkalis, salt solutions, and industrial effluents per ISO/TR 10358, preventing electrochemical corrosion and scaling. In flanged assemblies, the maximum recommended continuous service temperature for PVC-U is 45 degrees Celsius, with corresponding thermal de-rating factors applied above 20 degrees Celsius. The serrated flat jointing face ensures reliable gasket retention and positive sealing when compressed with elastomeric profile gaskets in EPDM or FKM.

This threaded fixed flange is widely deployed in industrial water treatment, chemical distribution, process engineering, swimming pool installations, and utility water systems. Threaded assembly requires the application of virgin PTFE sealing tape on the male mating thread; solvent cements or chemical jointing pastes that cause stress cracking in thermoplastics must be strictly avoided. During flange bolting, uniform diametrical torque tightening in multiple progressive increments ensures planar compression without inducing excessive bending moments on the PVC-U flange ring.