Full automatic long arm extrusion welding process is adopted for internal welding production, which is an important step in all processes. The new PPH granular material with the same performance as the tank body is hot melted at the inner weld seam and integrated with the tank bottom and tank body. The principle is the same as external welding, but the equipment is different. External welding is a one-time welding process for large welds of parts with high internal stress in the tank by using the imported full-automatic extrusion welding unit. The new PPH particles with the same performance as the tank body are hot melted at the large weld seam and integrated with the tank bottom and tank body. During welding, the depth must exceed 0.5mm. For various scratches or harmful defects, attention should also be paid to polishing, and polishing should be smooth. The thickness of steel plate after grinding shall not be less than the nominal thickness difference of steel plate.

Construction process of chemical storage tank:

Substrate treatment: before coating, the coating surface must be thoroughly cleaned and free of rust, scale, oil, water and dust. The rust removal standard should comply with GB8923-88. Sand blasting requires Sa2.5 or mechanical derusting St3 at the rust level.

Construction temperature: the coating work shall be carried out under the climatic conditions of temperature above 5 ℃ and relative humidity below 85%, and the steel surface temperature shall be more than 3 ℃ higher than the construction temperature. Dew point temperature.

Coating process:

This product is a two-component coating. Before coating, the coating components shall be stirred evenly, and the curing agent shall be added to the coating components according to the weight ratio required by the ratio, and can be used after being stirred evenly. After mixing the coating and curing agent components, the application period of this product is relatively short (4 hours in summer and 6 hours in winter).

Brush coating, roller coating, high-pressure airless spraying, etc. can be used for coating. In order to obtain better coating quality, high-pressure airless spraying is recommended. For corners, welds, cuts and other parts, a layer of paint shall be applied first, and then the paint shall be applied according to the process requirements.

The thickness of the paint film shall be strictly controlled, so that 90% of the measuring points reach the specified thickness, and the measuring points that do not reach the thickness of the paint film are 90% of the specified value.

Cleaning of paint construction equipment: use thinner.

PPH winding tank Construction safety:

This product contains organic solvents and is flammable. Paint production facilities and operating procedures must be implemented in accordance with the national standard;

All painting operators shall be trained in safety and health skills, strictly assessed and certified. Make them have certain safety knowledge and self-protection ability;

Avoid contact with the product or inhalation of its vapor by skin and eyes;

Wear protective clothing, goggles, masks and gloves at work;

Anti static measures shall be taken at the coating site to prevent fire;

This product shall not flow into the sewage system;

Waste paint and solvent shall be recycled in accordance with relevant regulations of China, and shall not be dumped randomly;

Cotton yarn, rags and other solvents and paints shall be put into metal buckets with covers (to avoid random accumulation, fire or spontaneous combustion), and shall be removed once a day, and littering is strictly prohibited;

The electrical equipment and lighting facilities in the painting workplace shall comply with China's regulations on electrical safety in explosive hazardous areas to achieve overall electrical explosion protection.

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