Simple. Make an enquiry to a FRP storage tank vendor, and look in the quote that comes back.
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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
FRP tanks have a great tendency to implode...with an explosion-like sound (make it difficult to tell b/w implosion & explosion). Making it thick enough will avoid both
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Chemical Engineers are like high Temperatures & high Pressures