Bk Mueller 588-055HC Black Pipe Nipple 2x5.5 in Sch 40

Product Description

The BK MUELLER 588-055HC is a Schedule 40 black steel pipe nipple designed for threaded pipe assemblies in plumbing, gas distribution, and mechanical piping systems. Manufactured from welded steel with a black finish coating, this nipple measures 2 inches in diameter and 5.5 inches in length. It carries NPT threads conforming to ASME B1.20.1 and meets ASTM A733 material standards. Licensed plumbers, pipefitters, and mechanical contractors install these nipples to extend or connect threaded pipe runs in both residential and commercial applications.

This nipple is suited for use in water supply, gas piping, and industrial fluid systems where Schedule 40 black steel pipe is specified. The black finish is standard for gas service applications and uncoated interior systems. At 2 inches nominal pipe size, it fits standard 2-inch threaded fittings, valves, and pipe couplings. It is appropriate for new construction and replacement work in mechanical rooms, boiler rooms, and utility piping installations.

Key Features

• Schedule 40 wall thickness provides strength for standard-pressure service applications
• Welded steel construction meets ASTM A733 material requirements
• NPT threads conform to ASME B1.20.1 for reliable, leak-resistant connections
• Black finish coating suits gas service and uncoated piping systems
• 2-inch nominal size integrates directly with standard 2-inch threaded pipe fittings

Compatibility

Designed as an OEM-style replacement and standard-use nipple for 2-inch Schedule 40 threaded black steel pipe systems meeting ASME B1.20.1 and ASTM A733 specifications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with the applicable International Plumbing Code or International Fuel Gas Code requirements. Shut off the gas or water supply and relieve system pressure completely before disassembling any threaded connections. Apply an approved thread sealant or PTFE tape rated for the service type before making up connections. Do not over-tighten threaded joints, as this can crack fittings or distort threads.