Nibco B515406 Threaded Companion Pipe Flange 3 in

Product Description

The NIBCO B515406 is a cast copper threaded companion pipe flange rated for 150 psi service. It fits 3-inch pipe and features a female threaded end connection for joining flanged piping assemblies in plumbing and mechanical systems. The flange measures 7.5 inches in outer diameter with bolt hole centers spaced 6 inches apart, making it compatible with standard ASME B16.24 companion flange dimensions. At 7.13 pounds, it is a solid, full-weight fitting suited for commercial and industrial piping installations. Licensed plumbers and pipefitters are the primary installers of this type of fitting.

This flange is used in commercial and industrial plumbing, hydronic heating, and process piping systems where a threaded pipe connection must transition to a bolted flange joint. It is designed for use with 3-inch pipe in systems where copper or copper-alloy flanged connections are specified. Typical applications include pump stations, mechanical rooms, and water distribution headers where flanged takeoffs are required. The female threaded end connection accepts a standard male-threaded pipe end, allowing the flange to be screwed directly onto the pipe before being bolted to a mating companion flange.

Key Features

• Cast copper construction meets ASME B16.24 dimensional and material standards
• 150 psi pressure rating suitable for general plumbing and hydronic service
• Female threaded end connection for direct pipe installation without welding
• 7.5-inch outer diameter with 6-inch bolt hole circle for standard companion flange mating
• Fits 3-inch nominal pipe size

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3-inch nominal pipe systems requiring ASME B16.24 Class 150 cast copper threaded companion flanges.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ASME standards. Shut off and depressurize the system completely before removing or installing any flange fitting. Thread the flange onto the pipe using an appropriate thread sealant or tape rated for the service fluid, then align and bolt to the mating companion flange using the correct gasket material for the application. Do not overtighten threaded connections or exceed the 150 psi pressure rating of the fitting.