WELDING A CUT OUT FLANGE
WELDING A CUT OUT FLANGE
(OP)
All,
Please I will like to know if there is any code or specs on how many times you can cut out a flange and re-weld that same flange.
We have a 24'' X 900#. In modifying a pipe spool, we cut out the flange and we want to re-use it. is there a limit to the number of times we can re-weld a cut out flange.
Professionals, I really need your help.
Regards
Chitessy
Please I will like to know if there is any code or specs on how many times you can cut out a flange and re-weld that same flange.
We have a 24'' X 900#. In modifying a pipe spool, we cut out the flange and we want to re-use it. is there a limit to the number of times we can re-weld a cut out flange.
Professionals, I really need your help.
Regards
Chitessy





RE: WELDING A CUT OUT FLANGE
The issue is really one of material changes to the flange due to the heat input from the welding and its impact on the physical properties of the flange, in particular it's hardness, which varies by material, thickness, welding technique etc etc. Unfortunately some tests are destructive, hence a bit difficult to do unless you're trying to prove a point for many other similar fittings
You may be able to utilise the flange more times than twice, but it's really in the hands of the materials / welding engineer and the flange welding face may need to be tested for excessive hardness.
This is a response from the welding institute - http://www.twi-global.com/technical-knowledge/faqs...
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: WELDING A CUT OUT FLANGE
You're wasting money and time and schedule trying to salvage a bad job repeated already twice. Field repairs are about 150.00 - 200.00 per hour per man. Your flange can come overnight.
RE: WELDING A CUT OUT FLANGE
Chitessy