Mr Piedmont, you need to get a copy of NFPA 96-2008. NFPA is National Fire Protection Association, generally recognized as the authority on fire protection. 96-2008 specifaclly tells us that if you are not experienced in suppression system service, do not disarm the suppression system. Your phrase "pin out the fire suppression systems" leads me to think you are not experienced with suppression systems. Not all systems use pins, some do and some don't.

As far as the chemical/equipment used on exhaust systems, each system is different, so different techniques, equipment and chemicals are used.