Nickel-containing stainless steel, super duplex and super austenitic stainless steel because of its excellent corrosion resistance and high strength and become a popular material for desalination. Currently, S31603 and S31703 stainless steel and copper nickel alloys desalination owners want to use (at least a dry environment, lower temperatures and chloride), not ensure long-term reliability required. High nickel stainless steel although the higher unit costs, but due to the high strength, the use of the material thickness can be thinned, so as to reduce weight and lower cost compared with materials currently used quite competitive. With the new large-scale facility design life expectancy (now average design life of more than 4O years), life cycle costs become more important.
    In 2004, Outokumpu (formerly Avesta company) published two nickel alloy materials for desalination device. For multi-stage flash (MSF) device selection recommendations are as follows:
◆ condenser tubes (usually titanium or copper-nickel alloy) with S31254, S3275O and S32654;
◆ brine heater tubes and tube sheets with $ 32,654;
◆ flash chamber housing with $ 32205 (exemption painting, reduced maintenance) and S31254, $ 32654 (sealing surface flange connections);
◆ "downstream segments" with $ 32205.
◆ For reverse osmosis (RO) equipment, material recommendations are as follows:
◆ pressure pumps S31254, $ 32750 (for high-chloride environment) and IS32205 (for low-chloride environment);
◆ high-pressure pipe with $ 32750.
    Due to the high strength duplex stainless $ 32205, evaporator vessel can be made thinner, lighter than S31603 device is light, thin 30%, to a capacity of 16,000 cubic meters Libya / day multi-stage flash plant Yan, $ 32205 Duplex the price of stainless steel equipment more competitive. This is since 1993 conference in Yokohama, Japan, $ 32,205 on the evaporator vessel of the first commercial application. At that meeting, the first time for the whole duplex stainless steel evaporator vessel.
    In 2005, the International Society for desalination desalination and water re-use of the international conference, Outokumpu announced that it would lean duplex stainless steel for expansion projects and Taweelah B IJebel
Alil construction projects. The bottom of the evaporation of these plants dry degassed seawater exposure, we will use $ 32205 duplex stainless steel; evaporator upper exposed dry less aggressive condensate, will use the section $ 32101 Nickel stainless steels. 24% of nickel, chromium 20% and 6% molybdenum super austenitic alloy N08367 has been widely used in water treatment facilities. In the United States Association of Corrosion Engineers International Conference 2003 (NACE) the researchers have published a paper discusses the application of the reverse osmosis process N08367 and multi-stage flash desalination device technology. N08367 as an alternative material competitive, be used instead of traditional copper alloys. Copper alloy has some advantages, such as high thermal conductivity, etc., but also a copper alloy liquid flow caused by erosion, especially in the presence of sulfides and amines especially the presence of other pollutants. N08367 alloy, although higher than the price of copper-nickel alloy, but still competitive, it is because the use of the device section of the alloy can be thinner, lighter, and thus lower costs. In recent years, this alloy has been earmarked for a number of plants, including 2002 in the construction of reverse osmosis plant in the Western Hemisphere Trinidad critical pretreatment piping design capacity of the device is 109,000 cubic meters / day. 2001 article had introduced 90 / 1O copper-nickel alloy material an economical alternative to laser welding of thin-walled $ 34565 austenitic stainless steel process equipment for multi-stage flash evaporation chamber heat recovery section of pipeline, as. $ 34565 austenitic stainless steel is usually 17% of nickel, chromium and molybdenum by 24% to 4%. In addition, Johnson reportedly copper Aluminum Co., Ltd. of Henan, the company commissioned by the Israeli IDE, developed its own special seawater resistant aluminum tube, the product is mainly used for direct use of seawater, desalination, marine chemical, shipbuilding and other construction. Successfully developed special seawater resistant aluminum alloy tube has the following properties: (1) non-toxic side effects * (2) seawater resistant * (3) in seawater 120 degrees or less stable mechanical properties and corrosion resistance. (4) good thermal conductivity l (5) can withstand more pressure 1.5MPa l (6) good workability l (7) at a lower price.