1 inch Black Iron Coupling Female x Female

1 Inch Black Iron Coupling Female x Female – Threaded Fitting for Gas and Hydronic Systems

The 1 inch Black Iron Coupling Female x Female is a threaded pipe fitting used to join two male-threaded pipe sections of equal diameter in non-potable systems. This coupling is commonly utilized in natural gas, LP gas, hydronic heating, and low-pressure steam installations where mechanical strength and temperature resistance are critical.

Product Performance and Application

• ✅ Threaded End Connections Features NPT (National Pipe Thread) tapered threads for a tight mechanical seal suitable for gas and oil distribution systems.
• ✅ Carbon Steel Construction Manufactured from black malleable iron conforming to ASTM A197, offering strength, impact resistance, and durability in demanding applications.
• ✅ Corrosion-Resistant Finish Black oxide coating provides a layer of protection against oxidation in dry systems; not intended for use with potable water or corrosive media.
• ✅ System Compatibility Suitable for Schedule 40 and Schedule 80 steel pipe in threaded assemblies.

Installation Guidance

Installation should be performed with thread sealant or PTFE tape rated for gas service. Torque specifications depend on the thread engagement and system requirements. Fitting is designed for use in horizontal and vertical piping layouts. Over-tightening can compromise thread integrity or fitting alignment; adherence to ANSI/ASME B1.20.1 thread standards is recommended.

Technical Specifications

• Nominal Size: 1 inch
• Connection Type: Female NPT x Female NPT
• Material: Black malleable iron (ASTM A197)
• Finish: Black oxide
• Temperature Rating: Up to 366°F (186°C) in low-pressure steam systems
• Pressure Rating: 150 psi maximum working pressure (non-shock)
• Compliance: ANSI B16.3 and B16.14

Typical Use Cases

This fitting is commonly installed in gas appliance lines, heating systems, process piping, and general-purpose mechanical applications where potable water is not present. It is compatible with carbon steel pipe and fittings in industrial, residential, and commercial-grade systems.

Note

Not for use in potable water systems. For installations involving water distribution, corrosion-resistant alternatives such as galvanized or brass should be used per code.

For mechanical reliability in threaded gas and heating systems, the 1 inch Black Iron Coupling Female x Female provides the dimensional accuracy and durability required by professional installers. Use this fitting where strength and system continuity are mission-critical.