1-1/4 inch Carbon Steel 477 1G Gas Press Flange Adapter

1-1/4 Inch Carbon Steel Gas Press Flange Adapter – Transition Fitting for ANSI Flanged Connections

The 1-1/4 inch Carbon Steel Gas Press Flange Adapter provides a secure transition between carbon steel press piping and ANSI Class 150 flanged system components in fuel gas applications. Designed to meet industry codes and mechanical performance requirements, this fitting supports safe and efficient integration in gas distribution networks.

Application-Driven Design and Material Integrity

Manufactured from zinc-coated carbon steel, this flange adapter features a pre-installed yellow HNBR or EPDM sealing element approved for use in natural gas and propane systems. The press end is compatible with standard TH or V-profile pressing tools, eliminating the need for threading or welding and enabling safer installation in confined or flame-restricted areas.

• ✅ Material: Carbon steel with zinc-plated exterior for corrosion resistance in dry fuel gas environments
• ✅ Seal Element: Factory-installed gas-rated HNBR/EPDM for ANSI LC-4 and CSA 6.32 compliance
• ✅ Flange Compatibility: Matches ANSI B16.5 Class 150 bolt pattern for use with flanged valves, regulators, and appliances
• ✅ Connection Type: Press x Flange with visual leak detection feature for unpressed joints

Specifications

• Nominal Size: 1-1/4 inch
• Pressure Rating: 125 psi (fuel gas)
• Temperature Range: -40°F to 180°F (based on sealing element type)
• Standards: Conforms to ANSI LC-4 / CSA 6.32, NFPA 54 (National Fuel Gas Code)

Typical Use Cases

This flange adapter is commonly used to transition from press-joined carbon steel pipe to ANSI flange connections in gas meter assemblies, appliance connections, rooftop mechanical units, and boiler room installations. It supports modular system design while maintaining pressure containment and code compliance.

Installation Requirements

Proper installation requires square-cut, deburred pipe ends and approved press tool usage. Press connection must be completed to full insertion depth, and flange bolts torqued evenly according to ANSI standards to achieve correct gasket compression. Leak testing should be conducted using air or inert gas following applicable regulations.

System Note

Flange adapters in press systems streamline field installation while preserving the mechanical performance required by fuel gas piping codes. Carbon steel press components offer durable, long-term performance when installed and maintained in accordance with manufacturer instructions and code requirements.

The 1-1/4 inch Carbon Steel Gas Press Flange Adapter is a critical component for integrating flanged terminations in gas systems where press connection methods are specified. Its robust material, compliant design, and installation efficiency make it a dependable solution for professional-grade fuel gas projects.