Plate heat exchanger plate as the most important heat transfer link of the plate exchange system, the quality of the metal material directly affects the service life of the equipment. So in the parameter selection design, plate for the manufacturer will be strictly in accordance with the parameters provided by the user to repeat the design, the flow through the medium will also confirm its physical properties to ensure the selection of the corresponding material to avoid leakage!
Common tap water, pure water in general we choose stainless steel 304 material; then if it is well water, river water, closed cycle water and other media, we have to consider using 316L, because the composition of these media are more complex, 304 corrosion resistance is not as good as 316L. Then if it is seawater, then we must give priority to pure titanium GR1 material, seawater chloride ion concentration is relatively high, titanium material can meet the requirements. If you consider the cost performance, super stainless steel 254SMO can also be used in 316L above the chloride ion environment.
Dilute sulphuric acid concentration of less than 10%, the temperature is less than 50 ℃, you can use stainless steel 316L material, if greater than then need to use super stainless steel 904L, 254SMO or Hastelloy C276 and other materials. Phosphoric acid, hydrochloric acid the same principle.
Steam conditions are more common, generally the South choose to use stainless steel 316L material, because the temperature of steam is generally above 120 ℃. Northern consideration of the cost of the customer will choose 304 material, but over time, the plate heat exchanger plate has the possibility of deformation.
General equipment lubricating oil, hydraulic oil are selected stainless steel 304 material. High-temperature heat transfer oil is considered high-temperature resistance performance, in the three hearts recommended the use of 316L stainless steel material.
