I am on a Project in which I am dealing with air coolers, I have got heaters within it which have steam inlet and condensate outlet.

I am not clear to what is the purpose actually, you have an air cooler to cool the content in the pipe and how can the heaters be placed exactly below the air coolers.

I can understand their fuctions when they stand alone but why have the combined them togather.
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Then again one of my seniours was saying that once a equpment is given by the vendor into the site then no more weld can be plced on the equpment in this way we have to provide the vendor about alll the supportings etc well before he fabricates it.

Please clarify me.

Nazim.