1-1/4 inch Galvanized Iron Floor Flange

1-1/4 inch Galvanized Malleable Iron Floor Flange – Threaded Base for Structural Pipe Connections

The 1-1/4 inch Galvanized Iron Floor Flange is a threaded fitting designed to secure NPT-threaded steel pipe to flat surfaces in structural and mechanical support applications. Manufactured from malleable iron conforming to ASTM A197 and coated via hot-dip galvanizing per ASTM A153, this flange offers reliable performance in corrosion-prone environments and is engineered to accommodate moderate mechanical loads.

Drilled with four bolt holes for secure anchoring, the flange provides a stable base for vertical or horizontal pipe runs. It is commonly used in systems where piping needs to be surface-mounted to concrete, steel, or wood substructures. Typical uses include piping brackets, railing bases, air line drops, and equipment support points in both industrial and commercial construction.

Technical Specifications

• Material: Galvanized malleable iron
• Nominal Pipe Size: 1-1/4 inch NPT
• Thread Standard: ANSI/ASME B1.20.1 (National Pipe Tapered Threads)
• Bolt Pattern: Four-hole mounting flange, evenly spaced
• Manufacturing Standards: ASME B16.3, ASTM A197, ASTM A153 (for galvanizing)

Installation Considerations

Designed for surface-mounted pipe connections, this fitting should be secured using bolts or lag screws appropriate to the substrate material. NPT-threaded connections must be sealed using joint compound or PTFE tape. Ensure the pipe is aligned and properly torqued to avoid thread galling and ensure mechanical stability. Not rated for use in pressure-bearing systems involving potable water.

Application Overview

Frequently installed in utility rooms, equipment platforms, compressed air piping drops, and non-potable water lines. Also used in industrial railing and piping support structures where fixed surface mounting is required. Can be used indoors or in protected outdoor settings.

Performance Notes

Galvanized coatings provide resistance to oxidation, making this floor flange suitable for moderately corrosive environments. Malleable iron's ductility and strength ensure a reliable connection in static load-bearing installations.

Field-Ready Structural Base for Pipe System Anchoring

The 1-1/4 inch Galvanized Iron Floor Flange delivers dimensional accuracy, corrosion resistance, and mechanical support for anchored pipe connections in structural and mechanical systems. Designed to meet jobsite demands for performance, durability, and code compliance in non-pressurized applications.