API 650 vertical welded storage tanks shell plates

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Usually, the wind load in the API 650 vertical welded storage tanks construction area should be considered before the tank design and construction. The wind load in the API 650 vertical welded storage tanks construction area has an impact on the stability and economy of the API 650 vertical welded storage tanks. In the area with large wind load, it is safe to design the tank as "squat". When calculating the wind force, the influence of the thickness of the insulation layer of the API 650 vertical welded storage tanks, the shape of the ladder, the platform, the pipeline and the top cover must be considered.

When roof plates, knuckle plates, compression rings, and manways and nozzles including reinforcement are primarily subjected to atmospheric temperature, the rules in API 620 oil tank standard Q.2.3 shall govern.
Large Welded Storage Tanks Secondary Components
In general, secondary components include those components that will not be stressed to a significant level by the refrigerated liquid, those whose failure will not result in leakage of the liquid being stored, those exposed to product vapors, and those that have a design metal temperature of –60°F or higher.