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标题:Duplex Stainless Steel Digesters (Duplex Steel, DSS Steel Material)
正文:
After six years of operation in North America, duplex stainless steel digesters have proven to be more cost effective than digesters constructed from carbon steel, or those protected from corrosion using stainless steel weld overlay. This paper describes engineering considerations in design of DSS digesters, along with factors to consider in base material selection, welding characteristics and quality management.For more than two decades, duplex stainless steel (DSS) alloys have been used for paper industry digesters in Europe, Australia and New Zealand [1-4]. The earliest digesters were constructed from DSS clad carbon steel, but later digesters were fabricated from solid DSS plate. Since 1997, several pulp and paper producers in North America have installed solid DSS digesters[5-6]. Their experiences have been excellent, and today, all users in North America should consider to construct digesters from DSS as an alternative to carbon steel.Although the unit material cost for DSS is hi
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