2-1/2 inch X Close Black Steel Nipple

2-1/2" Black Steel Pipe Nipple – Threaded Extension for High-Pressure Applications

The 2-1/2" Black Steel Nipple is a straight pipe fitting with male NPT threads on both ends, used to extend pipe runs or connect fittings in carbon steel systems. Fabricated from schedule 40 seamless or welded black steel pipe, this nipple supports non-potable water, steam, air, and gas systems in commercial and industrial installations.

Its threaded ends conform to ANSI B1.20.1 standards, providing compatibility with standard female-threaded steel fittings and valves. The black finish is suitable for systems not requiring galvanic corrosion protection and where fire-safety compliance is critical.

Key Product Features

• ✅ Carbon Steel Construction: Designed to meet mechanical strength requirements in pressure-rated systems.
• ✅ NPT Threading: Machined per ANSI standards for tight thread engagement and minimal risk of leakage.
• ✅ Uncoated Finish: Appropriate for gas systems and environments where external corrosion protection is provided by other means.
• ✅ Standard Wall Thickness: Manufactured to schedule 40 for consistent pressure containment and dimensional reliability.

Technical Specifications

• Nominal Size: 2-1/2 inches
• Material: Black Carbon Steel (ASTM A53 or A106)
• Connection Type: Male NPT x Male NPT
• Wall Specification: Schedule 40
• Finish: Black (uncoated)
• Compliance: Threads per ANSI B1.20.1; pipe material to ASTM standards

Installation Guidelines

Install with thread sealant or PTFE tape appropriate to the application medium (e.g., gas-rated sealant for fuel lines). Inspect threads for damage or debris before assembly. Apply appropriate torque using a pipe wrench to ensure mechanical integrity without overstressing threads. Suitable for rigid pipe systems requiring non-flexible connections.

Typical Applications

This nipple is used in high-pressure environments, including steam systems, fuel gas piping, air compressor lines, and low-pressure hydronic networks. It is also employed in mechanical rooms and utility plants where threaded steel connections are specified for safety or code compliance.

Material Application Note

Black steel is preferred for gas and oil applications due to its strength and flame-resistance. Not recommended for potable water systems unless coated or lined appropriately and permitted by local plumbing codes.

The 2-1/2" Black Steel Nipple offers rugged performance for commercial and industrial use. Its compatibility with standard fittings and adherence to mechanical codes makes it a reliable component for contractors assembling high-integrity steel piping systems.