Does this mean that no one determines hydraulic conductivity in porous media by steady-state centrifugation anymore? If so, why? If not, what standard do they use to determine how it should be done?
I'm helping to compile a list of codes and standards for a project, and the list for the old project that we're using as a go-by includes ASTM D6527 ("Standard Test Method for Determining Unsaturated and Saturated Hydraulic Conductivity in Porous Media by Steady-State Centrifugation"). It seems...
r6155:
1) 54" OD, 3.25" wall thickness
2) I am aware of the PIP standard; I am here to discuss ways in which a davit supporting nearly 7,000 lb would differ from one supporting up to 2,000 lb.
3) It is definitely not required, but I agree that a manual hoist is not the most user-friendly...
SnTMan, thanks for your advice, it's very helpful. I've often wondered about the lack of provision for turning the davit as well; I would guess that if a couple of operators can't move it by hand they just loop a sling around the davit arm and use a chain fall, probably cursing engineers the...
In my experience, it's fairly easy to develop two or three "standard" designs that cover 80-90% of the units you will design, and that is worth doing. But as rb1957 says above, trying to find a single solution that works everywhere is probably more effort than it's worth.
It's very hard to find a single solution for lifting points, but here are some things to consider:
1. Is it an issue to have a permanent lug sticking up within the skid deck? If so, #3, 5, 6, 7, and 8 won't work (unless they are bolted and removed after installation).
2. Will a lift point...
I've been tasked with designing a top davit for a filter, and the design weight of the top blind flange is 6,750 lb. I've designed a few davits in my career using Procedure 6-1 in the Pressure Vessel Design Manual (Moss) but none with such a large load. The davits I have designed have all been...
