English to Portuguese Tech/Engineering Petroleum Eng/Sci Liquefied Petroleum test

standpipes, n—the vertical sections of pipe or tubing used for gauging extending from the gauging platform to near the bottom of tanks that are equipped with external or internal floating roofs.
Standpipes may also be found on marine vessels.
Standpipes are also known as “stilling wells” or “gauge wells.”

vapor control valve, VCV, n—a valve fitted on a standpipe, expansion trunk, or the deck that permits use of the portable handheld gauging/sampling instruments while restricting the release of vapors into the atmosphere.