Nibco B515356 Cast Copper Threaded Companion Flange

Product Description

The NIBCO B515356 is a cast copper threaded companion pipe flange rated for 150 psi service pressure. It is designed for use on 2.5-inch pipe with a 7-inch outer diameter and features a female threaded end connection for joining pipe sections at system termination or connection points. The bolt hole centers measure 5.5 inches across. Manufactured to ASME B16.24 standards, this flange is suited for plumbing and mechanical piping systems where copper material is required for corrosion resistance and compatibility with copper or copper-alloy piping. Licensed plumbers and pipefitters are the primary installers of this component.

This companion flange is intended for use in residential and commercial piping systems where a threaded copper flange connection is specified. It is appropriate for hydronic, process, and general plumbing applications requiring a Class 150 pressure rating. The female threaded end connection allows direct thread engagement with male-threaded pipe ends. Applications include mechanical rooms, pump connections, and piping manifold assemblies where ASME B16.24 copper flanges are called out by specification or code.

Key Features

• Cast copper construction meets ASME B16.24 for copper and copper-alloy pipe flanges
• Class 150 pressure rating at 150 psi for reliable service in standard plumbing and mechanical systems
• Female threaded end connection for straightforward thread engagement with male-threaded pipe
• 2.5-inch pipe size with 7-inch outer diameter and 5.5-inch bolt hole center spacing
• Single-piece cast construction provides consistent dimensional accuracy for leak-free flange joints

Compatibility

Designed as an OEM-style replacement or new-installation companion flange for 2.5-inch copper or copper-alloy threaded piping systems conforming to ASME B16.24 Class 150 specifications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable plumbing codes such as the IPC. Shut off and depressurize the piping system fully before removing or installing any flange. Use an appropriate thread sealant or PTFE tape on the male threads before engagement, and torque the flange bolts evenly in a cross pattern to ensure uniform gasket compression. Inspect mating flange faces and gasket surfaces for damage before assembly.