Drain lines from orifice plates and check valves should discharge into what type of container?

The recommended practice is for drain lines from orifice plates and check valves to discharge into a portable container. Using a portable container allows for flexible mobility and easier management of the collected fluids. This is particularly important for maintaining safety and environmental standards, as it enables operators to move the container as needed and facilitates proper disposal or recycling of the fluids.

Discharging into a portable container also helps to prevent potential leaks and spills, which can occur if the system is not monitored closely. Moreover, a portable container can be properly sealed and transported to a designated area for further processing or disposal, reducing the risk of contamination to the surrounding environment.

In contrast, options like an open pit may pose risks of overflow or uncontained spills, static tanks can potentially lead to issues with monitoring and accessibility, and sealed drums, while useful for storage, may not offer the same level of mobility and immediate handling flexibility as a portable container.