From the test by pressure hold 43 bar for a long time.
Check the part as follows:
1. Welds between the Header with Tube no leaks or deformation.
2. Welds between the Header with End cap no leaks or deformation.
3. Welds between the Header with Inlet pipe no leaks or deformation.
4. No deformation of the parts. (Header,Tube,End cap)