Screwed flange malleable iron drilled 4 holes

  Datasheet (PDF)

The Georg Fischer 329 screwed flange provides a robust, detachable transition between male-threaded pipework and flanged pipeline equipment, facilitating secure mechanical integration across industrial, commercial, and utility installations. Manufactured from high-grade decarburised annealed whiteheart malleable cast iron conforming to EN-GJMW-400-5 and Design Symbol A, the fitting exhibits high mechanical strength, structural integrity, and superior ductility capable of absorbing severe thermal expansion stresses, mechanical vibrations, and hydraulic pulsations. The precision-machined internal parallel pipe thread Rp conforms to EN 10226-1 and ISO 7-1, ensuring exact engagement and dependable pressure-tight sealing along the thread flanks when paired with a matching taper external pipe thread and approved jointing sealants. Finished with a protective hot-dip galvanized coating applied through molten zinc immersion, the fitting forms homogeneous iron-zinc alloy layers that deliver outstanding protection against internal and external corrosion, making it fully suitable for potable water distribution, heating and chilled water networks, non-aggressive gases, compressed air lines, and general fluid transfer systems. The integrated flange face features precisely drilled bolt holes arranged on a standardized pitch circle alongside a machined raised sealing face, guaranteeing uniform gasket compression, leak-tight face sealing, and seamless alignment with counter-flanges, valves, flowmeters, and pumping assemblies. The engineered design allows quick bolt-together installation, effortless disassembly for pipeline maintenance, component servicing, or plant modifications without cutting or welding pipe spools, thereby reducing downtime and installation overhead while ensuring long-term operational reliability in demanding piping networks.