Liquefied petroleum gas storage tank installation settings

(2) Scaffolding, portable ladders and other facilities erected for inspection must be safe and secure;

(3) The surface that needs to be inspected, especially the corrosion parts and the parts that may produce crack defects, must be thoroughly cleaned. The surface of the base material should expose the metal body, and the surface for ultrasonic flaw detection and penetrant testing should show the metallic luster;