Regarding whether the tube box of composite plate heat exchangers is heat-treated
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If a 4-pass floating-head heat exchanger tube box is made of Q345R+S30403 (10+3), is heat treatment required?
Water vapor does not exist at 1 atmosphere pressure and 0 degrees Celsius. The density of water at 20 degrees is 998.203 kg/m3. The density of water vapor at 1 atmosphere and 100 degrees Celsius is 0.60 kg/m3. 1 cubic meter of water turns into saturated steam at 100 degrees: 998.203 kg / 0.60 (kg/m3) = 1663.67 m3
What is a sofa building meant to illustrate? ? ? Regarding the original poster’s question: 1. Composite panels are heat-treated depending on the heat-treatment requirements of the base material, and the heat-treatment process is the same as that used for the base material. 2. Since the tube boxes require heat treatment, this factor must have been taken into account in the design. If high requirements exist regarding intergranular corrosion, then the stainless steel material should be one that contains elements to prevent intergranular corrosion, such as 316, 316L, 321, and other similar grades. 3. An alternative approach is to focus on the heat treatment process by reducing the temperature and extending the treatment time in order to prevent the stainless steel from becoming sensitized within its sensitization temperature range (refer to Table 8.0.3-2 in 20584). It is necessary to understand and apply the requirements outlined in HG20584 in conjunction with NB/T47015. Scoring