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Welded atmospheric water tanks are widely used for regulating and storing building water supply, as well as for thermal insulation and storage of hot water in hot water systems, and for condensing water tanks. It solves the problems of traditional water tanks, such as difficulties in production and installation, poor anti-corrosion effect, short service life, easy leakage of prefabricated water supply tanks, and aging of rubber strips. It has the advantages of high manufacturing standardization, flexible production, no need for lifting equipment, and no pollution to water quality.