Formation Reason and Treatment Methods of Cracks in an Alkali Storage Tank

The formation reason of cracks in the welding heat affected zone of a 50 m3 vertical concentrated alkali storage tank in the additive workshop of Jinzhou Petrochemical Company was analyzed and the corresponding treatment measures were put forward.The analysis results showed that the cracks appearing in the welding heat affected zone were a kind of alkali embrittlement stress corrosion cracks,and could be prevented by taking suitable materials,heating methods and temperatures.The treated tank has not shown cracking for three years.