Regarding the qualifications for heat exchanger design and manufacturing

If the heat exchanger is a pressure vessel, the designers and the drawing preparation units must possess a qualification certificate for pressure vessel design, while the manufacturing unit must have a license for pressure vessel manufacturing.

A pressure vessel manufacturing license is required.

It depends on what type of heat exchanger your company is purchasing. Some require a pressure vessel manufacturing license, while others do not. I can provide you with a phone number: 15905266986; it belongs to a professional heat exchanger manufacturer that holds a pressure vessel manufacturing license

Thank you very much to everyone for your replies. What kind of heat exchangers require a pressure license?

Is it a pressure vessel? Is it subject to supervision and inspection? It shall be determined in accordance with the three provisions of the <Regulations on Pressure Vessels>. Regulations on the Safety Supervision of Special Equipment, Order of the State Council of the People’s Republic of China (No. 373). The Regulations on the Safety Supervision of Special Equipment were adopted at the 68th executive meeting of the State Council on February 19, 2003; they are hereby promulgated and shall come into force as of June 1, 2003. 　　Prime Minister ** March 11, 2003 A pressure vessel refers to a closed device used for holding gases or liquids and capable of withstanding certain pressures. It is defined as a fixed or mobile container in which the maximum operating pressure is greater than or equal to 0.1 MPa (gauge pressure), and the product of pressure and volume is greater than or equal to 2.5 MPa•L, for gases, liquefied gases, and liquids whose maximum operating temperature is greater than or equal to their standard boiling point ； Gas cylinders, liquefied gas cylinders, and cylinders for liquids with a standard boiling point of 60°C or lower, whose nominal working pressure at full charge is greater than or equal to 0.2 MPa (gauge pressure), and whose product of pressure and volume is greater than or equal to 1.0 MPa•L ； Oxygen chambers, etc.

It should be noted here that **a licensing system is in place for the design and production of pressure vessels. Concept 1: A container is not necessarily a pressure vessel; for example, the cups we use are also containers. Concept 2: A heat exchanger is a device that transfers part of the heat from hot materials to cold materials; it has nothing to do with containers. For example, to use the cup as an analogy again: in winter, you fill the cup with hot water to warm your hands, and at that time the cup functions as a heat exchanger (cups have quite a few uses indeed:loveliness:). If you ask what qualifications are required of a heat exchanger manufacturer, it mainly depends on the methods used by that manufacturer to control the quality of its equipment. Simply put, it comes down to the factory’s quality system; since the quality systems of many factories exist only on paper, what matters most is the degree to which those systems are implemented in practice within the factory. It can’t be told from the certificate. It needs to be considered from several aspects, including the completeness of the data on the equipment that has been manufactured, the management practices in production, the quality of the equipment currently in use, and the inspection processes and control methods employed by the inspection department. Sometimes the requirement for a pressure vessel certificate arises because there are clear mandatory requirements regarding the quality assurance system for pressure vessel production; in fact, ASME can also be used to meet these requirements. All of this is to ensure that the quality system can be implemented smoothly. :) Of course, if your device is a pressure vessel, you must have a production license in order to manufacture it: lol

This has been made very clear already. It is necessary to determine whether qualifications are required based on this. Anyone can do it as long as they don’t fail to meet this requirement. Containers that meet the requirements must be manufactured by manufacturers with qualifications corresponding to the level they are intended for.