Please advise as to the clearance required for the tubes where the tubes pass through the weir.  The Client is concerned about the possibility of vapors by passing the tubes and entering into the vacuum system.  Please provide design calculations proving the 116mm+ clearance is not a problem.

Note added 15 May 2007 - Understand your reply.  In a telephone conversation on 07 May 2007, Mr. Jamie Horton spoke with Mr. Patil and it was agreed that Techno Force will supply a baffle around the tubes at the entrance to the weir.  This baffle will decrease the amount of flow area and allow the required clearance for the tubesheet head to pass through the weir.  Can Techno Force revise the assembly drawings to show this baffle? Thank you.