API 650 self-anchored flat-bottom steel tanks bottom-reinforcing plate

API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API 650 self-anchored flat-bottom steel tanks design metal temperatures no lower than the impact test temperature required by the ASTM specification for the applicable material grade without additional impact tests. For temperatures below those allowed by the ASTM specification, the following paragraph shall apply.

API 650 vertical tanks meet American Petroleum Industries (API) standards in design, material, fabrication, and testing of aboveground welded steel API 650 self-anchored flat-bottom steel tanksstorage tanks for use in industrial applications.

Comparison of the quality of mechanical cleaning and manual cleaning of vertical storage tanks, API 650 self-anchored flat-bottom steel tanks. The mechanical cleaning of the API 650 self-anchored flat-bottom steel tanks can make the inside of the tank be thoroughly cleaned in multiple directions, and the cleaning quality is high, and the cleaned oil does not contain lumpy impurities. While the walls and roof of the API 650 self-anchored flat-bottom steel tanks cannot be cleaned in multiple directions during manual cleaning, and the cleaning quality is not easy to be guaranteed. The oily sewage collected after cleaning usually contains a lot of lumpy impurities, and these oil products are difficult to clean.