Quality requirements for duplex stainless steel digester fabrication

摘要

Fabrication of 22% chromium duplex stainless steel (DSS) digesters requires careful control of the quality of materials and welding. Use of DSS for kraft and sulphite applications and comparisons of corrosion rates of DSS to carbon and austenitic stainless steels are shown. Engineering considerations are given for impact testing, corrosion testing, formed head construction, painting and finishing.