Backing flange PP-Steel d200-d400 PN16

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The Georg Fischer PP-Steel backing flange PN16 is engineered specifically for flanged connections in butt fusion polyethylene (PE) pressure piping networks. Manufactured to combine the superior corrosion resistance of glass-fibre reinforced polypropylene (PP-GF) with the mechanical rigidity of an encapsulated ductile iron insert (GG50), this composite flange ensures uniform bolt torque transmission across heavy-duty industrial, municipal, and utility installations. BigWeld supplies these precision-moulded components as an authorised Georg Fischer distributor, guaranteeing verified component traceability and full manufacturing integrity across European infrastructure projects.

The structural hybrid design resolves the classic challenge of thermoplastic flange deformation under sustained tightening torque. The internal ductile iron core provides high bending resistance, preventing dish-warping or relaxation at operating pressures up to 16 bar. Simultaneously, the robust polypropylene outer shell protects the metallic core against aggressive atmospheric exposure, chemical splashes, and buried soil environments, eliminating the galvanic and electrochemical corrosion risks common with standard coated steel flanges. The profiled face is engineered to align seamlessly with the mating contour of PE flange adaptors, distributing mechanical clamping forces evenly across the sealing face to maintain optimal gasket compression and leak-free joint stability.

Covering nominal diameters from d200 to d400 (DN200 through DN400), this component range adheres strictly to the metric drilling dimensions of EN 1092-1, ISO 7005, and DIN 2501. The drilling patterns incorporate 12 to 16 bolt holes accommodating metric fastener sizes from M20 to M27, allowing direct bolt-up compatibility with standard butterfly valves, gate valves, and metal counter-flanges. With unit weights ranging from 3.380 kg up to 20.600 kg depending on diameter, the flange delivers an exceptional strength-to-weight ratio, simplifying alignment during field erection while fulfilling rigorous industrial safety margins.