Discuss the precautions for constructing new storage tanks

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(1) Surface treatment: The surface of the newly constructed storage tank’s steel structure should be subjected to sandblasting before applying the primer, in order to achieve the Swedish standard SIS055900 Sa2.5 grade; in areas where sandblasting is not feasible, power tools should be used for rust removal to reach the SIS055900 St3 grade. Use compressed air to blow away dust and sand particles, and use a solvent to remove oil stains. The surface must be free of slag, flux, and arc dust; the edges must be free of burrs and residual rust. Irregularities on the surface or other surface defects caused by sandblasting must be smoothed and filled in, or otherwise properly treated. Apply the primer within 6 hours after surface treatment. (2) Painting environmental conditions: It is advisable to paint when the weather is good; painting should not be done on wet surfaces. Work should not be carried out during rainy, foggy, snowy, or haily weather. The optimal temperature for painting is 5–35°C, with a relative air humidity of no more than 80%. Painting facilities should take appropriate shielding measures to prevent dust and rain from falling on uncured paint surfaces. (3) Requirements for the painting process: Two-component coatings must be prepared in accordance with the specified ratios and thoroughly mixed evenly; the viscosity suitable for application should be adjusted using specialized diluents, depending on the specific application method. The mixing ratio of two-component coatings should be determined based on the required amount and the construction capacity during the usage period; it must be used up within that period, as it cannot be used after the expiration date. If one batch of materials is not used up, the Component A must be thoroughly mixed evenly first; thereafter, Component A and Component B should be weighed in proportion and then mixed together thoroughly. Appropriate application methods are selected based on the construction conditions and area, as well as the application properties of the paint: Brushing method: Apply with a paint brush. When brushing on, it is advisable to alternate vertical and horizontal strokes. Pre-coating should be applied first to welds, rivet heads, and edges. Roll coating method: The roller should be dipped in the paint evenly. When applying paint, move the roller slowly up, down, left, and right to prevent the paint from spilling over the edges of the roller. Pre-coating should be applied first to welds, rivet heads, and edges. Air spraying method: During spraying, the spray gun should be at the correct angle and distance (30-50 cm) from the surface to be coated. When moving the spray gun up, down, left, and right, the distance between the spray nozzle and the surface to be coated should remain constant; it should not move in an arc-shaped path. Pre-coating should be applied first to welds, rivet heads, and edges. Airless spraying method: This method is recommended for large-scale applications. Pre-coating should be applied first to welds, rivet heads, and edges. During coating, the wet film thickness can be measured at any time, and the dry film thickness can be calculated; by adjusting the application method, the dry film thickness can be controlled to meet the specified requirements. During painting, the specified application intervals must be followed. If painting is carried out after exceeding the maximum repainting interval, to ensure interlayer adhesion, it is advisable to roughen the surface before applying the paint. The coating can be put into use only after it has fully cured. For detailed construction process parameters, please refer to the product manual.