[ Water & Wastewater ]
The Drouin wastewater treatment plant in Victoria , Australia . Photo : Gippsland Water .
sea outfall . Ham Baker is installing what may be the world ’ s biggest and highest penstocks , made in duplex S32750 .
Materials In new water treatment and management systems , stainless steel has superseded carbon steel , cupronickel and other materials in many applications . The advantages in terms of weight ( allowing greater thinness and lighter , easierto-manage structures ), corrosion / erosion resistance and hygiene are too great to ignore . The most important trend in recent years has been the increased use of duplex stainless steels compared to austenitics . This is most evident in desalination , and companies such as Outokumpu offer a suite of duplex grades to cater for the different conditions in each plant . A recent example is an MSF desalination plant recently built by Fisia Italimpianti , for which Outokumpu supplied both Forta
DX 2205 and the milder lean grade Forta LDX 2101 for two different applications within the evaporation chambers . In non-desalination applications , too , lean duplex is set to gain market share . Veolia and two stainless steel makers , Aperam and Outokumpu , have collaborated with the French Corrosion Institute to study the role lean duplexes could play . According to an independent study , Aperam ’ s DX2202 ( 1.4062 ) lean duplex offers the same level of corrosion resistance as 316L in wastewater applications . A similar grade is Nippon ’ s NSSTS2351 , developed as an alternative to 316L to handle brackish water . Forta LDX 2101 has also been applied in a new storage tank design by Invest- Tech . These tanks dispense with the traditional round shape , being built in square or rectangular segments to allow expansion .
References
( 1 ) Stainless Steel World , January / February 2009 .
( 2 ) https :// www . oxfam . org / en / whatwe-do / issues / water-and-sanitation .
Lean Duplex – the future of stainless steel
Benefits of letting Lean Duplex replace 304 and 316L :
• Superior corrosion resistance to comparable austenitic grades ( 304 and 316L )
• Double strength , make use of physical properties and let it become your advantage
• Price-efficient alternative to austenitic 304 and 316L
• Less sensitive to high raw material costs
Our stock grades of Lean Duplex :
• 1.4482 / SS LD24 – most competitive priced alternative to 304 – Available now
• 1.4162 / LDX 2101 – classic Lean Duplex serve your demand
• 1.4362 / EDX 2304 – a cost-efficient alternative that replaces 316L
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