1/2 inch x Close Black Steel Nipple

1/2" Close Black Steel Nipple – Threaded Fitting for High-Pressure Systems

The 1/2" Close Black Steel Nipple is designed for connecting two threaded pipe fittings in a tight configuration, providing a compact and durable solution for fluid or gas transport systems. Manufactured from schedule 40 black steel, this nipple offers mechanical strength, resistance to deformation, and reliable sealing in non-potable water, air, oil, and gas applications.

Key Performance Characteristics

• ✅ Schedule 40 Construction: Provides consistent wall thickness for dependable pressure handling.
• ✅ Close Nipple Design: Minimal thread exposure maximizes space efficiency for tight installations.
• ✅ Machined Thread Ends: NPT threading ensures compatibility with standard pipe fittings and valves.
• ✅ Uncoated Black Steel: Suitable for use in oil and gas systems where corrosion resistance is not a primary requirement.
• ✅ Temperature & Pressure Resistance: Withstands elevated temperatures and working pressures common to HVAC and fuel gas networks.

Specifications

• Material: Black steel (ASTM A53 or equivalent)
• Nominal Size: 1/2 inch
• Length: Close (typically ~1.5" overall, with minimal unthreaded barrel)
• Thread Type: NPT (National Pipe Thread), both ends
• Wall Thickness: Schedule 40
• Use Classification: Non-potable systems; compatible with gas, air, and oil lines

Installation Guidelines

This fitting should be installed using thread sealant tape or pipe dope rated for the media being transported. Ensure proper thread engagement to maintain pressure integrity. Over-torquing should be avoided to prevent thread damage or cracking. Compliant use in fuel gas distribution systems should align with ANSI B1.20.1 and NFPA 54 installation standards.

Typical Applications

The 1/2" close black steel nipple is widely used in:

• Natural gas and propane distribution networks
• Steam and hydronic heating systems
• Compressed air piping in industrial facilities
• Oil transport and lubrication lines in mechanical systems

Did You Know?

Close nipples are favored where space constraints prevent the use of standard-length pipe segments and where system compactness is essential—particularly near equipment such as valves or regulators that require direct coupling.

This black steel nipple meets the demands of mechanical systems requiring rigid, pressure-rated connections with a reduced footprint. Whether applied in a commercial boiler room or an industrial gas manifold, this fitting offers proven utility and performance under demanding conditions.