What layout can be used with all approved piping materials?

The dual pressure system is effective because it allows for the use of a variety of materials that can operate under different pressure conditions. This flexibility makes it compatible with a broader range of approved piping materials, catering to diverse operational needs and safety standards. In this system, one pressure level can be employed for the supply, while a different, often lower pressure, can be maintained for distribution. This capability ensures that materials that might not be suitable for high-pressure applications can still be utilized in a safe and efficient manner.

A single pressure system operates uniformly, which may limit the types of materials that can be safely used based on the maximum pressure rating. A low-pressure system, while less restrictive in terms of pressure, might not be suitable for all gas types or operational requirements. A gravity system relies on the natural downward flow of gas, which is not directly related to the use of piping materials but is more about the elevation and engineering of a gas distribution network.