April 2011

Plant Design and Engineering

How you can precommission process plants systematically

Follow these guidelines for the best logical sequence for startup preparations

Ramnath, V., Engineers India Ltd.

Leading to engineering completion, operating personnel need to convey to the project/construction team which sections of the unit/plant are to be handed over chronologically so that the entire procedure is smooth. This information is conveyed by dividing the unit/plant into sections called systems. Each operating facility and associated units are divided into logical process and/or piping equipment systems. Normally, the precommissioning and commissioning of units in the chemical process industry are carried out on a system-by-system basis. Systems are divided into process and utility systems. Process systems are those involving process fluids (e.g., the atmospheric distillation unit column

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