Purpose of Trepanning in Shell & Tube Heat Exchangers?
Purpose of Trepanning in Shell & Tube Heat Exchangers?
(OP)
As stated in header.
Is it just for facility of welding, or is there a design rationale involved?
Is it just for facility of welding, or is there a design rationale involved?
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"





RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
What's the context?
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
Not really a trepan, I guess.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
Its used for large holes where solid drilling would be to power consuming see this link.
http://www.sandvik.coromant.com/en-gb/knowledge/dr...
“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
Not what I am thinking of. Picture a moat around the tube hole on the tubesheet face.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
See pages marked 3,4,5 and 6on the actual sheets
“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
The tubes are then but welded to the stubs, from the tube ID, without filler, in one pass.
It lets you join tubes to tubesheets without any crevices on either side.
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P.E. Metallurgy, Plymouth Tube
RE: Purpose of Trepanning in Shell & Tube Heat Exchangers?
I think it is used for in bore welded tube to tubesheet connections, like seen here: http://www.knm-group.com/images/products&servi...
By machining the grove an orbital but weld can be made.
This is sometimes used for high pressure quench coolers.
Daniel Breyer
Inspection Engineer
http://lnkd.in/dFcQA-w