ISO 630 Gr E275D plates API Std 650 anchored liquid-storage tanks

Ultrasonic testing can find the internal defects of API Std 650 anchored liquid-storage tanks welding joint, this detection method is very accurate for the internal layer defects of oil tank, but ultrasonic detection is not suitable for the detection of thin-walled storage tank materials. Dye penetrant testing is only suitable for detecting the defects of the surface opening of API Std 650 anchored liquid-storage tanks and so on metal oil tanks. The feature of this method is convenient and fast.

The inner and outer tanks may be decoupled for seismic design of the tank and anchorage and assumed to act independently. However, if the inner and outer tanks API Std 650 anchored liquid-storage tanks are supported by a common foundation, the seismic foundation loading shall be calculated using the lesser response modification values for either the inner tank or outer tank for both tanks and a dynamic analysis shall be performed to determine the combined effect.
Allowable Stresses: For Appendix R tanks, design allowable stresses shall be per API 620 large low pressure storage tank, Section R.3.3.

The API 650 is the American standard for welded flat-bottomed vertical API Std 650 anchored liquid-storage tanks storage tanks. This standard dictates tank design, manufacture, welding, inspection and installation requirements.