NFPA 54/ANSI Z223.1, National Fuel Gas Code 2018

Help improve safety and maintain compliance when designing, installing, and maintaining fuel gas systems with NFPA 54/ANSI Z223.1, National Fuel Gas Code.

NFPA 54 is an essential resource for industries including construction, fuel distribution, manufacturing, building operations, food service, health care, and alternative energy. The code provides comprehensive requirements to help support safe fuel gas system installation, operation, maintenance, inspection, and testing across residential, commercial, and industrial occupancies.

From the risks of carbon monoxide poisoning to potential fire and explosion hazards, NFPA 54 helps professionals mitigate dangers associated with gaseous fuels by establishing requirements for gas piping systems, appliances, venting systems, inspection, leak checks, purging procedures, and combustion safety.

Who Uses NFPA 54?

NFPA 54 is relied upon by professionals responsible for fuel gas system safety and compliance, including:

• Engineers
• HVAC technicians
• Facility managers
• Maintenance supervisors
• Utility professionals
• Fire marshals
• Code inspectors and authorities having jurisdiction (AHJs)

These users depend on NFPA 54 to help maintain safe and code-compliant fuel gas systems across a wide range of applications and occupancies.

Key Topics Covered

NFPA 54 provides requirements covering:

• Piping system design, materials, and components
• Pipe sizing and installation for underground, aboveground, and concealed spaces
• Piping inspection, testing, leak checks, and purging procedures
• Process air and appliance installation requirements
• Venting systems and combustion product removal
• Minimum safe performance criteria for fuel gas systems

Highlights

Key updates and changes to the 2018 edition of NFPA 54/ANSI Z223.1 include:

• Revisions based on recognized risks, recent research, and evolving construction practices and technologies
• Updated piping requirements allowing listed arc-resistant jacketed or coated corrugated stainless steel tubing (CSST) to use the appliance electrical grounding connector as the bonding means
• Recognition of stainless steel smooth wall pipe and tubing products as acceptable piping materials
• Revision of the minimum wall thickness requirement for carbon and stainless steel pipe to Schedule 10, while prohibiting screwed fittings on Schedule 10 pipe joints
• Press-connect fittings now recognized as an acceptable joining method for piping systems
• Updated venting requirements requiring listings to applicable UL standards for:
  • Plastic venting materials
  • Factory-built chimneys
  • Type B and BW vents
  • Chimney lining systems
  • Special gas vents
• Clarification that direct vent clearances for appliances above 150,000 Btu (44 kW) must comply with the appliance manufacturer’s installation instructions
• New requirement mandating inspection of existing gas appliance installations for combustion air and venting code compliance when buildings undergo specified air infiltration-reducing modifications

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