Heat Exchanger Quality Identification

Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid, also known as heat exchanger.
heat exchanger occupies an important position in chemical, petroleum, power, food and many other industrial productions and is widely used. For example, it can be used as a heater, cooler, condenser, evaporator and reboiler in chemical production. In addition, heat exchangers are widely used in heating to provide heat to rooms. The working principle of
heat exchanger is mainly to transfer heat from hot fluid to cold fluid through convective heat transfer and heat conduction to meet the specified process requirements. Depending on the purpose of use, some heat exchangers are used to provide heat to the target, while others are used to absorb heat and dissipate heat to prevent the target temperature from being dangerously high.
In heat exchanger quality appraisal cases, Zhongke Testing can provide heat exchanger quality appraisal services.

①According to application: heater, cooler, condenser, reboiler, evaporator, etc.
②According to the heat transfer mode: direct contact heat exchanger, energy storage heat exchanger, partition heat exchanger.

GB/T 39286-2020 Absorption heat exchanger
GB/T 24590-2021 Special tube for high-efficiency heat exchanger
GB/T 14845-2007 Titanium plate for plate heat exchanger
GB/T 39557-2020 Household refrigerator heat exchanger
GB/T 25862-2010 Coaxial sleeve-type heat exchanger for refrigeration and air conditioning
GB/T 3625-2007 Titanium and titanium alloy tubes for heat exchangers and condensers
GB/T 39296-2020 Evaluation of operating effect of circulating cooling water treatment Monitoring heat exchanger method
GB/T 41872-2022 Heat exchanger for refrigeration systems and heat pumps Performance testing and evaluation method of temperature, pressure and speed synergy

A new energy company signed an industrial equipment repair contract with an environmental protection technology company. The environmental protection technology company will clean the heat exchanger equipment of the energy company in accordance with the contract. The next day, the equipment involved in the case had a pipeline leakage problem. The energy company believed that the fungicide used in the cleaning process was the direct cause of corrosion and perforation of the equipment.
was entrusted by the court to conduct identification and analysis on the "cause of pipe leakage" of the heat exchanger involved in the case.
appraisal analysis results: The
appraisal analysis expert group discussed the relevant information and on-site investigation of the heat exchanger involved in the case and made a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
There are many factors that cause corrosion and perforation of the heat exchanger involved. The material composition of the heat exchanger equipment has been identified as not meeting relevant standards, and the product quality itself is not up to standard; the heat exchanger will be exposed to chloride ions in the long-term working environment, and the formation of electrochemical corrosion will also cause damage to the equipment.
comprehensive analysis shows that there is no direct causal relationship between the equipment leakage problem and the pipeline cleaning work. However, since the environmental protection technology company in question did not provide the types, names, physical and chemical indicators of the chemicals used in the cleaning process before the on-site inspection, it cannot be ruled out that the cleaning fluid used has a certain impact on the damage to the heat exchanger.