ABSTRACT
The basic general requirements of fluid and ventilation systems are set in terms of delivery requirements, which usually are the flow rates and pressures at various points in the system. To make these requirements more specific, the engineer first develops a set of system diagrams. These diagrams give a schematic representation of the system and establish all system characteristics. These characteristics include applicable operating specifications and data necessary for the ordering of all system components. They are developed very early in the preliminary design stage to allow early ordering of components requiring long delivery times, and to define what should be included in the general arrangement drawings, which will be developed at a later time. These diagrams reflect the applicable specifications of the system owner, insurance underwriters, engineering societies, and applicable local, state, and federal codes.
