API standard 650 mechanically-anchored tanks local deviations

API 620 Crude Oil Tank Non-pressure Parts
Welds for pads, lifting lugs, and other nonpressure parts, as well as temporary lugs for alignment and scaffolding attached to primary components, shall be made in full compliance with a welding procedure qualified in accordance with Q.6.1. Lugs attached for erection purposes shall be removed, and any significant projections of API standard 650 mechanically-anchored tanks weld metal shall be ground to a smooth contour. Plate that is gouged or torn in removing the lugs shall be repaired using a qualified procedure and then ground to a smooth contour. Where such repairs are made in primary components, the area shall be inspected by the liquid-penetrant method. A visual inspection is adequate for repairs in secondary components.

API 650 petroleum storage tanks are used for API standard 650 mechanically-anchored tanks storage. API 650 petroleum storage tanks can be made of carbon steel, austenitic stainless steel and nickel alloy (only for low temperature). Welding API standard 650 mechanically-anchored tanks certification is regulated by Section 10 of the American Society of Mechanical Engineers (ASME). For API 650 petroleum storage tanks, non-destructive inspections are required, but third-party inspections are not required.

Usually, the wind load in the API standard 650 mechanically-anchored tanks construction area should be considered before the tank design and construction. The wind load in the API standard 650 mechanically-anchored tanks construction area has an impact on the stability and economy of the API standard 650 mechanically-anchored 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 standard 650 mechanically-anchored tanks, the shape of the ladder, the platform, the pipeline and the top cover must be considered.