1-1/2 inch Black Steel Nipple Run (Close to 6 inch)

1-1/2” Black Steel Nipple – Schedule 40, Threaded Both Ends

The 1-1/2” Black Steel Nipple is a Schedule 40 carbon steel pipe segment with male National Pipe Taper (NPT) threads on both ends. It is designed for use in non-potable water, oil, air, and gas applications where durable, rigid connections are required. This fitting is manufactured in accordance with ASTM A733 specifications and fabricated from pipe conforming to ASTM A53 or equivalent.

Commonly used in low- to medium-pressure piping systems, the nipple allows for extended linear connections between fittings, valves, or components. Its uncoated black finish is intended for above-ground installations where external corrosion protection is either not required or applied in the field.

Technical Specifications

• Nominal Pipe Size: 1-1/2 inch
• Material: Welded carbon steel
• Finish: Black (bare, non-galvanized)
• Wall Thickness: Schedule 40
• Connection Type: Male NPT x Male NPT (ANSI/ASME B1.20.1)
• Length: Available in lengths from close to 72 inches
• Compliance: ASTM A733, ASME B36.10M, ASTM A53 Grade B (for pipe material)

Installation Guidelines

Apply pipe joint compound or PTFE thread sealant to ensure a leak-resistant seal. Tighten connections using standard pipe wrenches, being careful not to overtighten and distort the threads. Ensure the threads are clean and properly aligned before installation. This product is not approved for use in potable water systems unless specified by local code and proper certification.

Common Applications

Used extensively in fuel gas distribution, low-pressure steam systems, mechanical piping for HVAC systems, and industrial utility lines. Frequently specified in boiler rooms, equipment rooms, compressor systems, and structural pipe frameworks where rigid, threaded connections are required.

Material Insight

Black steel pipe nipples are preferred in applications where welding is not feasible or permitted and where a durable, rigid mechanical connection is needed. The lack of internal coating makes these nipples suitable for oil and gas, but not recommended for corrosive fluids or prolonged water exposure without added protective treatment.

Threaded Carbon Steel Nipple for Commercial and Mechanical Systems

The 1-1/2” Black Steel Nipple offers a code-compliant, pressure-capable solution for connecting threaded components in steel piping systems. Built for strength and dimensional consistency, it supports a wide range of mechanical, industrial, and commercial plumbing configurations where robust performance is required.