3/4 inch x 6 inch Black Steel Nipple

3/4" x 6" Black Steel Nipple – Threaded Schedule 40 Pipe Segment for Gas and Mechanical Systems

The 3/4" x 6" Black Steel Nipple is a schedule 40 pipe fitting with tapered male NPT threads on both ends, designed for joining components in mechanical, HVAC, gas, and hydronic piping systems. Manufactured from welded or seamless carbon steel pipe per ASTM specifications, this nipple supports threaded connections in high-temperature and moderate-pressure applications.

Its black oxide coating helps resist oxidation during handling and installation. Suitable for above-ground piping, the 6" length provides convenient reach and flexibility for manifold connections, equipment hookups, or system extensions where full-length pipe sections are impractical.

Product Features

• ✅ Schedule 40 Wall – Compatible with standard threaded steel piping systems.
• ✅ Threaded NPT Ends – Precision-machined threads meet ANSI B1.20.1 standards for gas-tight mechanical seals.
• ✅ Carbon Steel Construction – Fabricated from ASTM A53 or A106 pipe for strength and temperature resistance.
• ✅ Black Oxide Finish – Intended for dry environments; suitable for gas lines, air systems, and non-potable water.
• ✅ Field-Ready Dimensions – 6-inch length provides controlled span for system alignment and inline connections.

Technical Specifications

• Material: Carbon Steel (ASTM A53 Grade A or equivalent)
• Nominal Size: 3/4 inch
• Length: 6 inches
• End Connections: Male NPT x Male NPT
• Wall Type: Schedule 40
• Standards: Conforms to ANSI B1.20.1; Pipe per ASME B36.10M

Installation Considerations

Threaded connections should be prepared using appropriate sealant or PTFE tape to ensure tight engagement and prevent leakage. Avoid excessive torque to prevent galling or distortion of threads. This product is not rated for direct burial or potable water service unless specifically coated or certified.

Typical Applications

Used in gas distribution, compressed air systems, hydronic heating, and low-pressure steam lines. Commonly installed in mechanical rooms, utility runs, appliance hook-ups, and branch takeoffs where compact, threaded piping segments are required.

Regulatory Note

Black steel nipples are commonly approved for use in natural gas and propane systems when installed in compliance with NFPA 54 or other applicable local codes. Always verify system compatibility and local inspection requirements prior to installation.