max speed of external floating roof
max speed of external floating roof
(OP)
There are any limits to the speed of an external floating roof (API650 hydrocarbons) during operations?
Somewhere I read ~3.5 m/h, that's correct? There are useful technical references?
The objective is to carry out safe loading/unloading operations.
Thanks
Somewhere I read ~3.5 m/h, that's correct? There are useful technical references?
The objective is to carry out safe loading/unloading operations.
Thanks





RE: max speed of external floating roof
I asked the same question a while back and came to the conclusion there isn't one.
3.5 m/hr sound like 1ft every 5 minutes converted to metric.
I think anything up to 5m/hr sounds ok.
See http://www.eng-tips.com/viewthread.cfm?qid=415297
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: max speed of external floating roof
RE: max speed of external floating roof
1 - when the roof leans on the supports happens a dynamic load that could be higher than verified/designed,
2 - high speed of roof could give wall more wetted with more emissions of VOC and risk of fire,
3 - electro-static charges.
RE: max speed of external floating roof
2 & 3 are part of normal operation. I can't see either being an issue.
floating roof tanks tend to be a decent size normally and fill rates are just not that high in terms of roof speed.
SO unless someone finds some company guidelines, I don't believe there is any recognized or written standard which addresses this specifically.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: max speed of external floating roof
i m talking about an anomalous run:
wrong indication of level and operator distracted
so the speed of the roof is still the normal, until reaching the support quota and below.
I understand that the case is very rare and can be easily avoided with more safeties.
ref. 2
i don't know if there is a speed of the roof beyond which the wall becomes too wetted.
If i understand, you said there is not a limit, a little more liquid over the seal doesn't grow up the risk of fire.