3/4 inch x 48 inch Black Steel Nipple

3/4" x 48" Black Steel Pipe Nipple – Schedule 40, NPT Threaded Both Ends

The 3/4" x 48" Black Steel Nipple is a Schedule 40 carbon steel pipe segment used to join threaded pipe and fittings in mechanical, HVAC, and gas systems. Manufactured in accordance with ASTM A53/A733 specifications, this nipple features NPT threads on both ends and is designed for use in non-potable water, air, gas, and oil applications.

This long-length nipple is commonly installed where extended runs are required between fittings or when bridging structural gaps in pipe layouts. The black finish (uncoated steel) is suitable for above-ground installations where corrosion protection is not a primary concern or where external protection is field-applied.

Technical Specifications

• Nominal Pipe Size: 3/4 inch
• Length: 48 inches
• Wall Thickness: Schedule 40 (Standard Weight)
• Material: Welded carbon steel, black (ASTM A53 Type E Grade B)
• Thread Type: Male NPT x Male NPT (ANSI/ASME B1.20.1)
• Manufacturing Standard: ASTM A733 (nipple), ASME B36.10M (pipe dimensions)

Installation Notes

Use in conjunction with compatible threaded fittings. Apply approved thread sealant or PTFE tape to threads before tightening. Install using pipe wrenches with attention to torque specifications to avoid damage to threads. Black steel is not approved for direct use in potable water applications unless specifically listed or coated.

Common Applications

Used in fuel gas lines, fire protection systems (non-potable), industrial compressed air distribution, low-pressure steam, and general utility piping. The 48" length supports long-span piping needs in mechanical rooms, utility corridors, or structural bridge assemblies where coupling with shorter pipe segments is impractical.

Material Insight

Black steel pipe offers strength and dimensional stability in dry or interior conditions. It is often specified where cost-effective rigid pipe is needed for medium-pressure applications and field coating or insulation may be applied post-installation for environmental protection.

Threaded Carbon Steel Nipple for Extended-Run Installations

The 3/4" x 48" Black Steel Nipple provides a durable, code-compliant solution for long-distance pipe runs in threaded carbon steel systems. Its fabrication quality and standardized threads ensure compatibility with common fittings and valves used in commercial and industrial infrastructure.