When performing acid cleaning on a tubing run after installation, what is very important to do?

When performing acid cleaning on a tubing run after installation, it is crucial to drain the low points. This ensures that any accumulated contaminants, debris, or cleaning agents that could damage the system are removed effectively. By draining the low points, you minimize the risk of having residual acid left in the tubing, which could lead to corrosion or other damage if not properly flushed out. Proper drainage helps maintain the integrity of the system and ensures that the cleaning process is thorough and effective.

While placing a basin at the end of the run helps to catch any fluid, leaving valves open can lead to uncontrolled flow and venting high points is more about relieving pressure than ensuring proper cleaning. Thus, draining low points is a critical step in safeguarding the system during acid cleaning.