1-1/2 inch x 12 inch Black Steel Nipple

1-1/2" x 12" Black Steel Nipple – Threaded Pipe Fitting for Gas and Mechanical Systems

The 1-1/2" x 12" black steel nipple is a straight, schedule-rated pipe segment with male National Pipe Thread (NPT) threads on both ends. Manufactured from welded or seamless carbon steel pipe per ASTM specifications, it is designed for use in low-pressure gas, steam, and fluid transfer systems where durability and strength are required.

This nipple is commonly used in natural gas distribution, fire protection loops, and mechanical piping systems. The black finish (uncoated) allows for use in applications where galvanization is not required or permitted, such as gas lines or systems exposed to elevated temperatures.

Material and Construction

• Material: Carbon steel per ASTM A53 or A106 (Grade A/B)
• Wall Type: Schedule 40 (standard weight unless otherwise specified)
• Finish: Black (non-galvanized), mill coating or light oil film
• Ends: Male NPT x Male NPT, tapered thread per ANSI B1.20.1
• Length: 12 inches overall (including thread engagement)

Approved Applications

• Fuel gas piping (natural gas, propane)
• Fire sprinkler branch lines and risers
• Low-pressure steam piping (condensate returns, headers)
• Water and air systems (non-potable only)
• Process piping in industrial and commercial facilities

Installation Guidelines

This fitting is intended for threaded pipe systems and should be installed using pipe joint compound or PTFE tape suitable for the media being conveyed. Proper torque must be applied to ensure joint integrity without overstressing the threads. Always follow local code requirements regarding material approvals and pressure ratings.

System Compatibility Notes

Black steel nipples are not approved for potable water systems. They are typically selected for their cost-effectiveness and pressure-handling capabilities in heating, gas, and industrial process systems. For corrosive or outdoor environments, protective coatings or alternate materials (e.g., galvanized or stainless steel) may be required.

Product Summary

The 1-1/2" x 12" black steel nipple provides a standardized, pressure-rated solution for extending or connecting pipe runs in mechanical, fuel gas, or process systems. Its NPT-threaded ends support secure, leak-resistant connections when installed with appropriate sealants and techniques.