1-1/2 inch x 4 inch Black Steel Nipple

1-1/2" x 4" Black Steel Pipe Nipple – Schedule 40, Threaded Ends

The 1-1/2" x 4" Black Steel Nipple is a heavy-duty Schedule 40 welded steel fitting designed for threaded piping systems in low- to medium-pressure applications. It is fabricated in compliance with ASTM A733 specifications for welded and seamless carbon steel nipples, using pipe material conforming to ASTM A53 standards.

This fitting is used to extend, adapt, or join sections of threaded steel pipe and is suitable for both gas and hydronic systems. The black (uncoated) finish makes it appropriate for oil, gas, air, and steam applications where corrosion from exposure is not a concern.

Product Features

• ✅ Threaded Male x Male – Standard NPT threads (ANSI B1.20.1) provide a reliable mechanical seal when used with thread sealant or PTFE tape.
• ✅ Carbon Steel Construction – Provides structural strength for high-load, pressurized systems.
• ✅ Cut-Length: 4 Inches – Precision-cut to fit short-length requirements in confined runs or transitional assemblies.
• ✅ Pipe Schedule 40 – Standard wall thickness suitable for typical industrial and plumbing installations.

Installation and Use

Installation of this steel nipple should be performed using standard pipe wrenches and thread-sealing materials suitable for the system’s media (e.g., gas-rated thread compound or PTFE tape). Excessive torque or cross-threading must be avoided to maintain seal integrity. This product is intended for professional use in systems operating within standard design pressures and temperatures.

Typical Applications

• • Gas distribution piping (natural gas, propane)
• • Oil and diesel fuel lines (non-corrosive environments)
• • Low-pressure steam and air service lines
• • Closed hydronic heating and chilled water circuits

Specifications

• Material: Welded carbon steel
• Finish: Black (uncoated)
• Nominal Pipe Size: 1-1/2 inch
• Overall Length: 4 inches
• Thread Type: NPT (Male x Male)
• Standards: ASTM A53, ASTM A733, ANSI B1.20.1

Note

Not suitable for potable water systems due to uncoated black steel surface. For environments requiring corrosion resistance or potable water compliance, consider galvanized or stainless steel alternatives. Always verify material compatibility with local code requirements and system specifications.