Here is my suggestion. I use 10 psi above any pressure relief device in the system as the barrier set point. I must encourage you however to check with the pump manufacturer first.
Mroz
I can't point you to a bona-fide publication, but I strongly support NOT insulating flanges. Especially in a corrosive service. Exactly for the reason you mention, LEAKS. If the service is exceptionally hot, a stress analysis should be done, and at this time a flange report could be generated to...
In addition stainless steel is highly corrosive when in the presence of chlorides. (stress cracking). If you indeed needed to bury SS pipe, I would use a duplex type stainless such as 2205 or 2507. <p>Mroz<br><a href=mailto:dan@mroz.com>dan@mroz.com</a><br>
