Weep Holes in Vacuum Rings
Weep Holes in Vacuum Rings
(OP)
I am using channel rolled with legs in as external stiffeners due to vacuum on a horizontal vessel. Is it permissible under ASME Sect. VIII to drill 1/8" dia. weep holes at the low point for leak detection?





RE: Weep Holes in Vacuum Rings
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: Weep Holes in Vacuum Rings
Another approach would be to continuously weld the top (keep out any rain) and have intermittent welds on the bottom leg to shell weld. That would give you the same effect as the weep holes.
Presumably there is a good reason to use a channel in its weak axis instead of its strong axis. Normally I'd expect to see the channel rolled the hard way with legs pointing down and one flange welded to the shell kind of like Fig. UG-30(d).
jt