When using steel tubing flare connections, what is a necessary step?

When using steel tubing flare connections, double flaring is essential to ensure a proper and secure seal. A double flare involves creating two flares on the end of the tubing, which increases the mating surface and creates a more robust connection. This type of connection helps to accommodate any thermal expansion and contraction as well as vibrations that may occur during the system's operation.

Additionally, the double flare provides enhanced resistance to leaks, making it particularly important in propane applications where safety is critical. A properly executed double flare will also help distribute forces evenly across the flare fitting, ensuring a stronger and more reliable connection over time.

While some other methods or materials might be applicable in different contexts, for steel tubing flare connections specifically, double flaring is the industry-standard practice to ensure safety and integrity in propane systems.