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The ASC Engineered Solutions 330049800 is a black steel pipe nipple designed for use in threaded piping systems across commercial and industrial applications. This close or short nipple connects two threaded fittings or pipe sections and is manufactured from black steel, making it well suited for gas distribution, compressed air lines, and general-purpose plumbing where corrosion resistance from protective coatings is not required. At 3.5 inches in diameter and 4.5 inches in length, it falls in a commonly specified size range for medium-bore pipe assemblies. Pipefitters, plumbers, and mechanical contractors are the primary installers of this component.
This black steel nipple is used in residential and commercial piping systems for natural gas, propane, steam, and compressed air service. It is a standard threaded fitting installed wherever a short rigid connection is needed between valves, regulators, fittings, or equipment ports. The import designation indicates it is manufactured outside the United States, which should be noted for projects with domestic-content requirements or Buy American compliance specifications.
Designed as an OEM-style replacement or new-installation fitting for threaded black steel piping systems using standard NPT connections in the 3.5-inch nominal pipe size range.
Installation should be performed by a licensed plumber, pipefitter, or qualified mechanical contractor in accordance with applicable IFGC, IPC, or local mechanical codes. Shut off and depressurize the piping system completely before removing or installing any threaded fittings. Apply an approved pipe thread sealant or PTFE tape rated for the intended service medium to all threaded connections. Do not over-tighten threaded joints, as this can damage threads and cause leaks.
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