ASME B16.40-2024

Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems

ASME B16.40-2024, titled “Manually Operated Thermoplastic Gas Shutoffs and Valves in Gas Distribution Systems”, establishes the design, materials, dimensions, and testing requirements for manually operated thermoplastic valves used in gas distribution systems. It is part of the ASME B16 series of standards, which focus on valves, flanges, and fittings.

Key Features:

1. Scope and Application:
   • Covers thermoplastic shutoff valves for controlling gas flow in distribution systems.
   • Applicable to natural gas and other gaseous fuels, typically operating at lower pressures.
2. Design Requirements:
   • Provides specifications for valve design to ensure reliable operation under specified pressure and temperature ranges.
   • Addresses durability, sealing performance, and mechanical strength.
3. Materials:
   • Specifies thermoplastic materials suitable for gas distribution systems.
   • Includes compatibility requirements with conveyed gases and environmental conditions.
4. Testing:
   • Defines pressure testing protocols to verify strength and leakage performance.
   • Mandates qualification testing for durability and operational reliability.
5. Markings and Documentation:
   • Requires clear identification of valve specifications, including size, material, and pressure rating.
   • Calls for documentation of compliance with the standard.

Importance:

ASME B16.40-2024 ensures safety, reliability, and standardization for gas shutoff valves, which are critical components in gas distribution systems. It provides guidelines that help manufacturers meet regulatory and operational requirements while ensuring product performance in field applications.