1 inch x 12 inch Black Steel Nipple

1" x 12" Black Steel Nipple – Built for High-Pressure Industrial and Commercial Applications

The 1" x 12" Black Steel Nipple is manufactured for use in systems that require strong, rigid connections capable of withstanding elevated pressures and temperatures. Designed with precision-cut NPT threads on both ends, this fitting enables secure integration with steel pipe and compatible threaded components in gas, water, and mechanical piping networks.

Constructed from seamless carbon steel pipe with a black oxide coating, this nipple is suitable for use in oil, gas, steam, and air systems where corrosion resistance and strength are critical. All dimensions adhere to ASTM and ASME standards, providing assurance of quality and compatibility across system designs.

Performance Features

• Pressure-Rated Construction: Fabricated from Schedule 40 carbon steel, suitable for medium- to high-pressure service lines.
• Threaded Ends: Machined to ANSI B1.20.1 National Pipe Thread (NPT) standard to ensure tight mechanical connections and minimize leakage.
• Surface Treatment: Black oxide finish offers mild resistance to rust and is commonly used in non-potable applications such as natural gas and fire protection systems.
• Rigid Integration: Straight-thread design allows rigid joint assemblies in confined spaces, eliminating the need for welding.
• Temperature Tolerance: Suitable for use in systems operating up to 650°F, depending on application parameters.

Technical Specifications

• Nominal Size: 1 inch
• Overall Length: 12 inches
• Material: Carbon Steel (ASTM A53 or equivalent)
• Connection Type: Threaded Male NPT x Threaded Male NPT
• Coating: Black oxide (non-galvanized)
• Compliance: Meets ASME B1.20.1 and ASTM A733 standards for pipe nipples

Installation Guidance

For optimal sealing, apply PTFE tape or approved thread sealant to both threaded ends prior to installation. Over-torquing should be avoided to prevent thread damage. This product is intended for use by qualified personnel familiar with threaded steel pipe assembly and local code requirements.

Common Applications

The 1" x 12" black steel nipple is widely used in compressed air systems, fire sprinkler risers, natural gas pipelines, hydronic heating loops, and mechanical infrastructure where durability and rigidity are required. Its compatibility with standard malleable iron and forged steel fittings makes it versatile across industrial, municipal, and commercial installations.

Did You Know?

Black steel piping is preferred for natural gas distribution because its lack of galvanization eliminates the potential for zinc flaking inside the line, which can damage sensitive gas regulators and appliances.

Specify the 1" x 12" Black Steel Nipple for high-demand plumbing and mechanical systems requiring code-compliant, pressure-rated performance. Engineered for longevity and reliability under real-world conditions.