Hose, flexible metal hose, and tubing must be designed for what conditions?

The correct answer emphasizes that hose, flexible metal hose, and tubing must be designed to withstand their most severe pressures and temperatures. This requirement is critical because these components are used to transport compressed natural gas (CNG) under varying operational conditions. They must be capable of handling extreme pressure and temperature fluctuations to ensure safety and reliability during use.

Designing these components for the highest expected pressures and temperatures ensures that they will not fail or leak, which could lead to dangerous situations such as gas escapes, potential explosions, or fires. This safety margin is a fundamental aspect of engineering standards for materials handling gas under pressure.

Static pressures and specific environmental conditions, such as high humidity or cold weather, are important considerations, but they do not cover the full spectrum of operating conditions these components may encounter. By focusing on the extremes, you ensure that the integrity of the system is maintained consistently in various operational scenarios.