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using API 650 ch5, net uplift=128kips uplift per bolt=16k I have 8 equally spaced anchors. If I assume 2 of the anchors are located perpendicular to the load relative to the tank, then there will be no force acting on them. of the remaining (6) anchors, three of them will be in compression...

"If pressure is low and moment is high", which pressure are you referring to? Couldn't I just treat the tank as a cantilevered beam/pipe with a moment, and use the moment calculated from ANNEX E to calculate the max tension at the fixed side?

As per API 650 clause 5.12 tank anchorage, table 5-21a shows uplift load calculation formula including seismic case as U=(4xMrw/D)-W2(1-0.4Av). The load per anchor equation (tb=U/N) appears to assume that all anchors will share the uplift load equally. However, if I have a cylindrical tank with...