Sheiko,
I have several pieces of advice and reccomendations.
First, I am a huge fan of Chemical Engineering Magazine as it is bascially a Practical and Applied ChE magazine. They also periodically publish collections of useful articles in one bound paperback. I have several of theirs on "Rules...
Generally, my "personal rule of thumb" is to try and avoid having strong acids and bases overhead where they may drip on someone. If necessary, I would reccomend trying to avioid or minimized joints over areas where people an vehicles go. Also, one can have catch pans underneith such pipe racks...