I have a question regarding the expansion jointing of heat exchange tubes

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It’s a bit hard to explain this issue in just a short time. Just now, the boss came over and said he wants to build a CO2 shell-and-tube heat exchanger with a design pressure of 130–150 MPa. The highest design pressure we have achieved so far was only 2.8 MPa. The copper tubes and tube sheets are connected using mechanical expansion joints. So what should we do in this case? I checked the applicable ranges of common expansion joining methods. 1. Strength expansion joining: Suitable for applications where the design pressure is less than or equal to 4 M Pa, the design temperature is less than or equal to 300°C, and there are no severe vibrations during operation, no excessive temperature changes, and no significant stress corrosion. 2. Strength welding: Suitable for applications with a design pressure of less than or equal to 35 M Pa, where there is no significant vibration and no crevice corrosion. 3. Expansion welding in combination: Suitable for applications where the design pressure is less than or equal to 35 M Pa, high sealing performance is required, vibration or fatigue loads are present, gap corrosion occurs, and composite panels are used. Which method should be used for something like this? Or should we use a different approach?