P&ID system on Visio

Key features of the P&ID: All process equipment is drawn in approximate proportion to its physical size and identified by its number, which is the same as that used on the PFD. The standard symbol representing an item of equipment should be a true indicator of its type (e.g. disc s tack centrifuge) rather than a generic indicator (e.g. centrifuge). Each pipe identified by a unique line number and the pipe diameter and material of construction are stated. All valves are shown and identified with a unique number. The type and size are indicated. Ancillary fittings that are part of the piping system are included and denoted by a unique identification number. All control loops and instruments are shown with each uniquely identified by a number. Attention should be paid to the location of instruments (e.g. local or panel mounted or computer monitored) and indicated by the correct symbol. Primary pipes are shown as thicker lines. All process information is omitted e.g. no stream numbers, stream compositions, mass flow rates etc.