API standard 650 unanchored flat-bottom tank sheets

In this project a cylindrical tank 75 ft in diameter is designed for an internal pressure of 0.5 lbf/in.2 gauge in the vapor space. The plate material is ASTM A131 Grade B steel for thicknesses of 1/2 in. and less.
The top course of the butt-welded cylindrical sidewall is 1/4 in. thick. The tank API standard 650 unanchored flat-bottom tank roof is a conical shape with a 2:12 slope and a 1/4 in. thickness with single full-fillet welded lap joints. The maximum design liquid level is 6 in. below the plane of juncture of the roof and sidewall.

API 650 storage tank, double-layer oil tank environmental protection advantages: ordinary single-layer steel API standard 650 unanchored flat-bottom tank oil tank is corroded by underground water and gas and electrolytic corrosion because it is buried underground all year round. The API 650 tank has a double-layer structure with a gap of 0.1 mm. The API standard 650 unanchored flat-bottom tank outer layer of FRP ensures that the leakage will not directly leak into the soil and water source.

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Unqualified welding quality of API standard 650 unanchored flat-bottom tank is prone to hidden dangers such as oil tank steel plate cracks and leakage. To avoid this situation as much as possible, it needs to be avoided when the oil storage tank is manufactured. Scientific and reasonable measures are adopted to control the welding quality when welding the API standard 650 unanchored flat-bottom tank. How to reasonably control the welding process quality of oil storage tanks?

The 365 day service system is implemented, and the business, loading and delivery are handled as usual in holidays and festivals. Actively help users solve difficulties. When users encounter difficulties in handling business, they should actively coordinate with the external solution; if they need to solve the problems internally, they should solve them in a timely manner without prevarication and wrangling. In line with the API standard 650 unanchored flat-bottom tank principle of "fairness, justice and timeliness", coordinate with relevant departments and deal with all kinds of objections in a timely manner.