Inert gases are used on process plants for a variety applications. Although usually non-toxic, inert gases can displace oxygen causing asphyxiation hazard. This article provides guidance on the design of inert gas systems.
Compressed air systems are found on many chemical plants. Air is used to operate process instruments (such as valves), drive pneumatic machinery and to purge vessels. This article describes how to design a compressed air system.
Water has a range of uses including: washing, use as a coolant, use as a solvent, production of steam, fire fighting and domestic water uses (drinking / flushing toilets / showers etc). This article gives some advice on factors to consider when designing potable water systems.