What is a characteristic of fittings in fuel gas systems?

Fittings in fuel gas systems are critical components that connect different sections of gas piping and ensure a secure, leak-tight system. One key characteristic of these fittings is that they must be certified. This certification ensures that the fittings meet specific safety and performance standards, as fuel gas systems must adhere to stringent regulations to prevent hazards such as gas leaks and explosions.

Certification indicates that a fitting has undergone testing to verify its quality and suitability for use in gas applications. This is particularly important because using non-certified fittings could compromise the integrity of the entire gas system, leading to dangerous situations.

Interchangeability of fittings can vary based on the type and standard of the fittings used, meaning they are not universally interchangeable across all systems. Additionally, while some fittings might be made of plastic, many are constructed from metals like steel or brass that are appropriate for handling combustible gases. Lastly, fittings are typically marked or labeled to indicate the manufacturer and specifications, ensuring proper identification and compliance with regulations. Thus, the requirement for fittings in fuel gas systems to be certified is essential for maintaining safety and operational integrity.