Flanges

[c1defence]

I thought I had read, but maybe wrong, about a flange that could be tested for leaks externally, to avoid internal hydrotest.
Is there such a flange? If yes, who makes it?
Cheers,
Shiv

 

[racp12]

c1defence,
May be you heard about slip-on flanges (see a brief explanation at:

http://www.pipingdesigners.com/Training - section 1d.htm

).
Use of this kind of flanges depends on type and run of the line. Notice that if besides the flange installation, it is necessary to perform welds on other part of the line, hydrotesting could be required

 

[PAN]

Do you mean KaMOS gasket? Please check this link.

http://www.karmsund.no/2.3_kamos_kammprofil.htm

 

[rconner]

I believe there have been many ways/devices/means made/used over the years that are capable in various manners (including various gas, hydrostatic, and even ultrasonic etc. means) of individually testing "flanges" and joints, and even from the "outside". However, while there is perhaps utility to all these approaches/devices in some circumstances (particularly e.g. for diagnostic purposes prior to filling a line and more extensive or difficult testing) in my opinion they are in general not technically equivalent e.g. to an eventual, properly run hydrostatic test of the entire pipeline.

 

[c1defence]

Guys,
Thanks for your valuable inputs, but it would seem that either there isn't a flange set that I'm looking for, or we haven't found it.
It doesn't matter as I have found a way of leak testing the flanged spool, blocked of upstream and downstream - two small tees/taps u/s and d/s of the spool.
Cheers