Backing flange PP-V d250-400 mm PN10 (butt fusion)

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The Georg Fischer PP-V backing flange d250-400 mm PN10 is a high-integrity, full-plastic loose flange engineered for polyethylene (PE) pipeline assemblies. Designed for butt fusion stub ends in industrial, utility, and process installations, this flange provides a dependable mechanical connection between thermoplastic networks and flanged assets like pumps, valves, and plant vessels. BigWeld, an authorised Georg Fischer distributor, supplies this component for operations where metallic backing rings cannot withstand aggressive media or corrosive soils.

Manufactured from PP-GF (polypropylene reinforced with 30% glass fibres), the PP-V flange provides structural rigidity, dimensional stability, and creep resistance under continuous tension. Unlike conventional coated steel or ductile iron backing rings that remain vulnerable to rust and galvanic degradation, this all-plastic construction delivers total corrosion resistance across acidic, alkaline, and saline environments. The material performs reliably in direct burial and demanding industrial atmospheres without degradation.

The flange features bolt circle patterns conforming to EN 1092, ISO 7005, and DIN 2501 PN10. Diameters d250 and d280 incorporate a combined metric-ANSI drilling configuration, facilitating cross-standard compatibility. The bolt hole pattern comprises 8 to 16 holes accommodating M16 to M24 fasteners. The engineered profile ensures uniform pressure distribution against the PE stub flange face, preventing localised stress concentration and maintaining joint integrity under cyclic pressure loads.

• Product Type: Full-plastic PP-V backing flange for PE stub flanges
• Manufacturer: Georg Fischer
• Material: 30% glass-fibre reinforced polypropylene (PP-GF)
• Size Range: Metric pipe diameter d250 mm to d400 mm (DN250 to DN400)
• Pressure Rating: PN10 (10 bar)
• Drilling Standards: EN 1092, ISO 7005, DIN 2501 (metric-ANSI combined for d250 and d280)
• Fastener Sizing: 8 to 16 holes for M16 to M24 bolts
• Field of Use: Industrial pipelines, utility distribution, and aggressive chemical processing