At my opinion, even a short vent on the underground tank will do. The air will escape preferably by the vent than by the dieselline and therefore no air will escape by the dieselline. The only reason I see for extending the vent untill above ground level is for removal of the diesel vapors...
MJCronin, Quark,
Thanks for your information, I'm indeed going to check out ANSI HI 9.8.
Concerning the pump this is a horzontal centrifugal pump of 1500m³/h placed next to the pit. There are already three identical pumps present, the distance between there (18")suctions is...
When adding an extra pump to a cooler tower bassin, the question rose : "where should I place this suction pipe in the bassin to avoid strong vortex and negative effects on flow and pump?"
Are there recommendations for minimum distance you should keep between suction pipes (of...