Wide Range Restrained Flange Adaptor MULTI/JOINT 3057 Plus DN50-600

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The Georg Fischer Waga MULTI/JOINT 3057 Plus wide-range flange adaptor is a tensile-restrained mechanical fitting engineered for utility, industrial, and municipal transport pipelines. Designed to bridge flanged components with plain-ended pipes, this adaptor accommodates wide outer diameter variations of up to 43 mm across nominal diameters from DN 50 to DN 600. It provides high mechanical restraint and leak-tight sealing across diverse piping materials, including ductile iron, grey cast iron, carbon steel, stainless steel, PEHD (PE80, PE100, PE100-RC), PVC-U, GRP, and asbestos cement, facilitating straightforward tie-ins, valve insertions, and system retrofits without requiring pipe-end preparation.

Manufactured from high-grade ductile iron EN-GJS-450-10 (GGG 45) according to EN 1563, the body and clamping ring deliver structural integrity and resistance to operational hydraulic surges. Mechanical tensile restraint is established by the integrated Uni/Fikser system, utilizing high-grade AISI 316 (A4) stainless steel gripping teeth embedded in polyoxymethylene (POM) wedge segments and polyamide (PA) topple carriers. Under hydraulic thrust or axial tension, the progressive gripping action secures plastic and metallic pipes without damaging pipe walls. The connection accommodates an angular deflection of up to plus/minus 8 degrees, compensating for trench settlement and pipeline misalignment.

Surface protection is provided by a GSK-certified Resicoat RT 9000 R4 fusion-bonded epoxy (FBE) powder coating applied to a minimum dry film thickness of 250 micrometres (RAL 3011 red-brown). This coating delivers comprehensive chemical resistance across a pH range of 2 to 13, dielectric insulation, and cathodic disbondment resistance for direct buried installations. Fasteners comprise grade A2-70 or A4-80 stainless steel bolts coated with Lubo dry anti-friction lubrication, preventing thread galling and cold welding while maintaining consistent torque conversion during tightening. Rated for nominal operating pressures up to PN 16 for water and up to 8 bar for gaseous media, each adaptor includes factory-fitted hygiene protection caps.