Originally Posted by Peter_1
We already had twice a leak on the steel discharge headers of a Profroid pack.
The main reason why they use steel headers - they said this to me during a visit at Profroid Marseille - is because it is cheaper and it goes much faster to fabricate headers by welding instead of soldering.
They also have a tube bending machine to eliminate soldering, so they have to use this technique as much as possible.
I don't fully understand what you meant about insurance but we made a pack some months ago with 5 compressors and with copper headers on LP and HP.
We pressurized it on 25 bar for leak checking, so it (LP side) can withstand more pressure then never needed.
What do you mean with this Mark?
Chemi has a point that steel becomes rusted when it's wet all days.
BTW about Profroid.... some Eurovent certified evaporator and condenser manufacturers complained to Eurovent that Profroid was stating that they were Eurovent certified.
As you maybe know, Profroid is owned by Carrier and the Finncoil units - also Carrier - were Eurovent.
So Carrier stated that all their evaporators and condensers were Eurovent certified.
To stop the rumors, AIA of Sweden bought a condenser and paid Eurovent to test it independent. So Profroid didn't asked for a certification, a competitor did if for them.
The results were amazing: the given capacities of some units was exaggerated with 51%!!!
I have copies of the results from the Eurovent tests.