Rapidrop 321G PN16 Grooved Adaptor Flange 4″ (100 mm)

SKU: Rapidrop-0103

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The Rapidrop 321G PN16 Grooved Adaptor Flange (4″ / 100 mm) is a heavy-duty, one-piece mechanical flange adapter designed to transition directly from a grooved pipe system to a traditional PN16 flanged connection.

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Category: Fitting Accessories

Brand: Rapidrop

Description

The Rapidrop 321G PN16 Grooved Adaptor Flange (4″ / 100 mm) is a premium transitional adapter engineered to connect grooved-end piping directly to flanged components like valves, pumps, and equipment utilizing a PN16 bolt pattern. Unlike standard multi-piece split flanges, the 321G model features a specialized one-piece construction that facilitates uniform bolt torque distribution and excellent structural integrity. Constructed from high-strength ductile iron with a corrosion-resistant red finish, it incorporates an integrated high-performance EPDM gasket to establish a completely leak-tight seal against the pipe wall. Designed for a nominal pipe size of 4 inches (100 mm), it functions reliably in both standard and thin-walled piping systems, supporting a maximum working pressure of up to 300 PSI (20.7 bar). It is UL Listed, FM Approved, and VdS certified, ensuring top-tier safety and durability in commercial fire protection and industrial fluid networks.

Features

One-Piece Adaptor Design: Features an integrated one-piece construction for enhanced rigid layout alignment and direct mechanical connection to flanged equipment.
Seamless System Transition: Facilitates a direct, clean conversion from a mechanical grooved line to a traditional PN16 flanged connection.
Integrated EPDM Gasket: Comes equipped with a high-performance contoured gasket that seals uniformly against the pipe to prevent systemic leaks.
Heavy-Duty Construction: Forged from robust ductile iron to withstand aggressive high-pressure flows, mechanical vibrations, and environmental impacts.
No-Welding Assembly: Eliminates the hazards, labor time, and expenses related to traditional welding or threading flanges onto pipelines.

Specifications

Brand: Rapidrop
Model: 321G PN16 Grooved Adaptor Flange (One-Piece Flange Adaptor)
Size: 4 inches (100 mm)
Pipe Outer Diameter (O.D.): 114.3 mm (4.500″)
Flange Specification: PN16 Bolt Pattern
Maximum Working Pressure: Up to 300 PSI (20.7 bar) / 2.07 MPa (depending on size and certification parameters)
Material: Ductile Iron
Gasket Type: EPDM
Approvals: UL Listed, FM Approved, VdS Approved

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