As I mentioned before, if you expand the tube next to the weld you will get a mechanical loading on the weld which can damage you weld. When you expand the tube is plastic deformed, the tube becomes flatter and a bit longer. So when you expand the tube next to a weld there will be a chance of...
Dear 212197,
Are you welding before expanding or expanding before welding?
When you expand the connection after welding, the 9mm free from weld secures that the amount of mechanical loading on the weld due to expanding is minimal.
Hi Fleischfresser,
How do you respond to a design surveyor (NoBo), who says: "Well, according the ASME you don't need to do an impact test. Unfortunately the impact requirement is a PED requirement so you need to do it anyway."
Best regards,
Bokkel
A while ago I have found the information below on another forum:
These pressures are not easy to calculate. For example the interface pressure based on tube expansion depends on the procedure used for tube expansion, effects of transportation shocks, non-linear effects on nearby tube holes when...
I should use a pass partition gasket. You don't want any leakage over the pass partition plate otherwise the water is flowing from inlet straight to the outlet and will impact the performance of the STHE. Why not use a camprofile gasket with a web over the width of the pass partition plate?
