Do metal storage tanks at atmospheric pressure require foot bolts?
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I have seen some metal storage tanks that use foot bolts, as well as those that do not use them. I wonder if there are any rules regarding this? The following pictures were taken in a tank area, and they seem to be quite standardized. However, I have seen in other places metal storage tanks in use where the nuts and fastening plates of these foundation bolts were removed; it is said that foundation bolts are only needed during construction, and can be dispensed with after the tank is built and put into operation. I’m not sure if this statement is correct What guidelines are in place to support this?
Foundation bolts have many functions, and most of them require calculation; they are essential to be used, even just to prevent displacement.
To consider the effects of seismic and wind loads, calculations shall be carried out in accordance with GB50341.
Based on the lifting force within the tank, as well as seismic and wind loads, calculations are carried out in accordance with GB/T50341. I have never heard that foundation bolts are only needed during construction and can be dispensed with after the facility is put into operation. Large storage tanks are constructed using either the upright or inverted method, with the bottom plate placed on the foundation; in this case, foundation bolts are not required.
Whether anchor bolts are needed has nothing to do with whether the equipment is under pressure; it needs to be calculated. It is generally always needed.
The GB 50341-2014 standard incorporates wind stability requirements based on API standards; as a result, many tanks designed after 2014 are equipped with foot bolts, and the regulations in this standard are quite strict. For those designed under the old version of 50341, many tanks did not require foot bolts
I’m really curious about the detailed specification requirements :) Sorry! I might be lazy; P isn’t professional enough either, so I can’t spend too much time looking up information: handshake
I see. So that’s how it is. Take out the old standards and compare them
1. Add it in areas with wind, such as ports and seaside areas. It must be added 100%. 2. Smaller diameter. The tanks are quite tall, so an addition is needed; things like towers, for example, all require a 3 increase. Nothing else needs to be added