1-1/4 inch x 9 inch Black Steel Nipple

1-1/4" x 9" Black Steel Nipple – Threaded Connection for Industrial and Commercial Applications

The 1-1/4" x 9" black steel nipple is a straight pipe segment with male National Pipe Thread (NPT) ends, designed for joining two female-threaded components. Its extended length and robust wall thickness make it ideal for structural and fluid conveyance applications in low- to moderate-pressure systems, including hydronic heating, fire protection, and industrial gas lines.

Performance Features

• ✔️ Schedule 40 Pipe Construction: Suitable for mechanical assemblies requiring pressure-rated components.
• ✔️ ASTM A733 Threading: Complies with standardized taper thread specifications for consistent sealing performance.
• ✔️ Welded or Seamless Carbon Steel Pipe: Manufactured to conform with ASTM A53 or equivalent for structural reliability.
• ✔️ Black Oxide Finish: Inhibits oxidation during handling and installation; commonly preferred for oil and gas transmission.
• ✔️ Machined Ends: Threaded on both ends for compatibility with valves, couplings, tees, or other fittings.

Technical Specifications

• Nominal Pipe Size: 1-1/4 inch
• Overall Length: 9 inches
• Connection Type: Male NPT x Male NPT
• Material: Black carbon steel (ASTM A53 or A106)
• Thread Standard: ANSI/ASME B1.20.1

Installation Guidelines

This nipple is intended for use in threaded systems and should be installed with approved pipe thread sealant or Teflon tape to ensure a gas- or liquid-tight seal. Use pipe wrenches or strap wrenches to avoid damaging the threads or compromising the structural integrity of the fitting. Avoid over-tightening to prevent thread deformation or splitting of female connectors.

Common Applications

Suitable for use in commercial piping systems, gas distribution networks, industrial equipment connections, and structural pipe assemblies. Frequently deployed in heating loops, compressed air systems, and oil distribution piping where schedule 40 carbon steel pipe is specified.

Industry Notes

Black steel nipples should not be used in potable water systems due to the lack of corrosion protection on the interior bore. For fluid systems subject to condensate or corrosive agents, consider using galvanized or stainless alternatives as appropriate for service conditions.

The 1-1/4" x 9" black steel nipple offers consistent performance and a reliable connection solution where code-compliant, threaded joints are required in high-strength, low-maintenance installations. Backed by decades of industry-standard fabrication methods and material specifications.