ASTM A633 plates API Std 650 ground supported liquid storage tanks
The vent pipe mouth should be 4m or more above the ground. The nominal diameter of the API Std 650 ground supported liquid storage tanks API 650 petroleum storage tank vent pipe should be no less than 50mm and a flame arrestor should be installed.
During heavy rain, closely observe the change of the water level in the storage area of the API Std 650 ground supported liquid storage tanks. If the water level rises to the dangerous range, drain the water immediately. There are more thunderstorms in heavy rain, and lightning protection devices should be installed in the API Std 650 ground supported liquid storage tanks area to avoid lightning accidents. Observe the groundwater level of the API Std 650 ground supported liquid storage tanks area at any time, clean and dredge the drainage ditch in time to ensure unobstructed drainage, and prevent the bottom of the API Std 650 ground supported liquid storage tanks from leaking and rusting due to untimely drainage.
Inspection of Welded Storage Tanks Surfaces Exposed during FabricationThe edges of API Std 650 ground supported liquid storage tanks plates, openings and fittings exposed during fabrication shall be inspected carefully to make sure that any defects have been uncovered, as well as to determine that the work has been performed properly.Minor defects found may be repaired only after the inspector approves the method and extent of repairs. Materials that have more than minor defects that cannot be satisfactorily repaired shall be rejected.Spot radiographic or ultrasonic examination shall be not less than 6 in. extending along the weld. Spot radiography shall comply with the standards given in 7.15.1.3. Where spot radiographic or ultrasonic examination is applied at joint intersections, the surface shall be prepared and examined for a distance of 3 in. on each side of the intersection, making the minimum length of examination 6 in. on the horizontal weld and 3 in. on the vertical weld.
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