Liquefied petroleum gas storage tank cleaning and polishing

The surface that needs to be inspected, especially the corrosion parts and the parts that may produce crack defects, must be thoroughly cleaned. The metal body should be exposed on the surface of the base metal. The inner surface weld and 100mm on both sides of the weld should be exposed to metal for magnetic particle inspection. Gloss, the polishing ratio should not be less than 20% of the internal surface welds; all pipes and fillet welds at the manhole circle for penetration testing should be polished to a metallic luster; the inner surface T-weld level welds for ultrasonic testing should be 100mm on both sides There should be a metallic sheen.