When new piping sections have been fabricated for installation in a hydraulic system, prior to installation the piping should be __________.

Correct Answer: Option B — descaled by using a pickling solution

New piping must be pickled to remove mill scale, rust, and welding slag. If left inside, these contaminants would circulate through the system, causing catastrophic damage to pumps and valves. Proper cleaning and flushing are mandatory steps before commissioning any new hydraulic piping installation on a vessel.