API Std 650 anchored liquid-storage tanks shell openings

All oil tanks have service life. Due to the pressure of the oil stored on the tank and the corrosion of the oil and external environment on the tank, the oil storage tank will gradually become thin or crack after a long time. Due to the different materials and environment of API Std 650 anchored liquid-storage tanks, the consumption of API Std 650 anchored liquid-storage tanks is different, so it should be taken into account when evaluating the remaining service life of API Std 650 anchored liquid-storage tanks.

The materials used in the construction of Appendix Q oil tanks may be subject to severe pitting, cracking, or rusting if they are exposed to contaminated test water for extended periods of time. The Purchaser shall specify a minimum quality of test water that conforms to Q.8.3.2 through Q.8.3.8. After the water test is completed, the tank API Std 650 anchored liquid-storage tanks shall be promptly drained, cleaned, and dried.

In Appendix E to API 650 oil storage tank, the maximum values of inertia force, pulse pressure and convection pressure are superimposed, and tend to be conservative.In GB50341, only pulse pressure is calculated for API Std 650 anchored liquid-storage tanks tanks below 5000 m.