[ Wastewater Management ]
[ Wastewater Management ]
High strength and ability to resist saltwater corrosion made Outokumpu Forta LDX 2404 duplex stainless steel the ideal material for the sluice gates at the at the Gårda Dämme in Gothenburg , Sweden . Photo : Outokumpu .
standard in nearly all modern upgrades and new-builds . A significant growing market is district heating pipes , where stainless is applied in both in the primary circuit connecting the power station to the substations and the secondary circuits within the buildings . The duplex family of stainless steels play an indispensable role in more demanding applications . The modes of use can be divided into two types of service : handling corrosive or erosive substances such as wastewater of saltwater ; and providing lightness and strength in floodgates . Desalination , a chemical process , requires various duplex and superduplex grades . The most demanding environments , combining heat , high pressure and corrosion , are found in the energyintensive MED and MSF plants , especially at the brine water intake stage . Depending on specific factors , superduplex type 2507 , lean duplex LDX 2101 , superaustenitic 254 SMO and austenitic 316L all come into play .
Duplex grades are also used in wastewater treatment processes , where high strength and resistance to erosion and corrosion are required . A recent example of its use in Barhale ’ s work for Thames Water on sewerage in East London , where duplex was applied on wastewater pipes . Another application requiring duplex is floodwater management . Municipalities are turning more and more to these grades for floodgates , where not only
18 Stainless Steel World October 2024 www . stainless-steel-world . net