2 inch x 8 inch Black Steel Nipple

2" x 8" Black Steel Pipe Nipple – Threaded Schedule 40 for Gas and Hydronic Systems

The 2-inch by 8-inch Black Steel Nipple is manufactured from welded Schedule 40 carbon steel pipe and features National Pipe Thread (NPT) male threads on both ends. Commonly used in low-pressure gas distribution, hydronic heating systems, and process piping, this fitting provides a robust, threaded solution for joining compatible black malleable or steel components.

Cut to nominal length and precision-threaded, each nipple undergoes quality assurance checks to ensure thread integrity, uniform wall thickness, and dimensional consistency. The black oxide coating helps mitigate corrosion during handling and storage but is not intended for potable water applications or direct exposure to corrosive environments.

Technical Specifications

• Material: Welded Schedule 40 black steel (ASTM A53/A) or equivalent
• Nominal Pipe Size: 2 inches
• Length: 8 inches overall (end-to-end)
• Thread Type: Male NPT both ends, per ANSI B1.20.1
• End Preparation: Tapered thread chamfered for clean starts and sealing

Application Considerations

• ✅ System Type Compatibility – Suitable for use in steam, air, oil, and natural gas systems; not rated for potable water or high-corrosive media.
• ✅ Threaded Assembly – Requires approved thread sealant or PTFE tape for leak-free joint assembly under pressure.
• ✅ Working Pressure – Matches Schedule 40 pressure ratings based on temperature and media type; consult engineering tables for application-specific limits.
• ✅ Pipe Coating – Black coating is intended for identification and limited corrosion resistance; not designed for exterior or submerged service without additional protection.

Typical Use Cases

This black steel nipple is frequently installed in mechanical rooms, boiler piping assemblies, gas manifold setups, and HVAC heating loops. Its threaded ends allow for rapid system modifications or component replacements without welding or grooving, reducing installation downtime and labor costs in retrofit or service environments.

Regulatory and Industry Use

Approved for non-potable systems and compliant with mechanical code specifications where carbon steel piping is permitted. Black steel nipples are widely specified in fire protection systems (where permitted), compressed air distribution, and fuel oil handling lines.

For reliable performance in threaded steel assemblies, the 2" x 8" black steel nipple offers durable construction and system-ready compatibility. Install in accordance with local codes and industry practices for safe and effective system operation.