It should be updated when any physical change is made so that the unit will remain compliant with codes, standards, and specifications, and can be operated safely under the defined process conditions. It is a key document for various reviews such as HAZOP, SIL, and operability.ĭuring Operation, you have to maintain P&ID in such a condition that it will show actual plant conditions at any time. P&ID is used to develop the piping layout and prepare bulk material take-off for piping, electrical, instrumentation, and civil. It is used to identify hazardous areas classification, and preparing data sheets of equipment, valves, and instrument. Use of P&ID/PEFS during the EPC phaseĭuring the EPC phase, P&ID is used to develop the individual unit layout. Plot plant is developed considering various inputs from P&ID and physical site location. It is also used to develop EPC contract specifications. P&ID is used to derive the Project capital cost estimates. That means during pre-EPC, EPC, and operation. It is used during the entire life cycle of the plant. That is front-end engineering and design. It is one of the main deliverables of FEED. This means if some system is shown on a single PFD, it may require multiple P&ID sheets to show the same system on P&ID. As said earlier, it is more complex than PFD. P&ID is a graphical representation of the actual process plant using various symbols that represent actual equipment. Gaskets & Spectacle Blinds Expand / Collapse.Pipe Fittings Inspection – Visual & Testings.
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