1 inch Galvanized Iron Floor Flange

1" Galvanized Malleable Iron Floor Flange – Secure Pipe-to-Surface Mounting

The 1" Galvanized Malleable Iron Floor Flange is engineered to provide a rigid and stable pipe mounting point in horizontal installations. This fitting is commonly used for terminating piping runs at floors or structural surfaces where a firm, bolted-down connection is required. The flange is designed for use with schedule 40 or 80 threaded steel piping and supports both mechanical and plumbing system assemblies.

Manufactured from malleable iron and hot-dip galvanized in accordance with ASTM A153 standards, this flange offers superior corrosion resistance for use in a variety of environments. It meets dimensional tolerances in accordance with ASME B16.3 and threading requirements per ANSI/ASME B1.20.1.

Key Technical Features

• Material: Galvanized Malleable Iron
• Nominal Size: 1 inch
• Connection Type: Female NPT threads
• Bolt Holes: Typically four (Ø varies by manufacturer), suitable for anchoring to wood, concrete, or metal substrates
• Surface Finish: Hot-dip galvanized for rust resistance in humid or outdoor environments
• Working Pressure: Matches the rating of the connected piping system (generally up to 300 psi for malleable iron fittings)

Installation Guidelines

Ensure threads are clean and undamaged before installation. Apply thread sealant (PTFE tape or approved pipe dope) to male threads before engaging with the flange’s internal threads. Torque by hand initially and then tighten using appropriate tools to achieve a leak-tight seal. Bolt holes should be aligned prior to final threading. Anchoring should be done with hardware rated for the substrate material.

Common Applications

• Securing vertical pipe drops to slab or flooring systems
• Supporting gas or water piping in mechanical rooms or service corridors
• Mounting piping to machinery bases or structural platforms
• Providing terminations in outdoor installations subject to moisture

Did You Know?

Galvanized malleable iron flanges are preferred in exterior installations because they combine high mechanical strength with resistance to oxidation. Their wide bolt footprint also distributes load effectively, minimizing strain on the joint and supporting substrate.

The 1" Galvanized Floor Flange is a standard component for anchoring pipe runs where alignment and stability are critical. Its durable construction, compatibility with threaded iron pipe systems, and corrosion-resistant finish make it suitable for high-demand plumbing and mechanical assemblies.