API Std 650 welded storage tanks vacuum breakers

Compared with the external floating roof API Std 650 welded storage tanks, the internal floating roof API Std 650 welded storage tanks has the advantages of protecting the floating roof from wind and rain and ensuring the quality of liquid storage under the floating roof. At the same time, because the inner floating plate is in the tank, there is no rain and snow load, so the central drainage pipe and escalator and other accessories on the floating plate can be omitted. In addition, under the same sealing conditions, the internal floating roof tank can further reduce the evaporation loss compared with the External floating roof tank.

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 welded 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.

We also specialize in internal and external floating roofs, cathodic protection, primary and secondary containment, and storage tank foundations. Our staff are skilled in producing API 650 petroleum storage tanks. If you need to replace or repair API Std 650 welded storage tanks API 650 petroleum storage tanks, please contact us in time. Every API 650 petroleum storage tank we make emphasizes quality and safety.