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Process Operation Technology

Oil, gas and petrochemical process industries


    Reading PFD & PID

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    Talib Al_Munawri
    Director-General
    Director-General

    Posts : 337
    Join date : 2009-07-03
    Age : 30
    Location : Sultanate of Oman

    Reading PFD & PID

    Post by Talib Al_Munawri on Fri Sep 04, 2009 9:58 am

    Reading PFD & PID



    Since process take place chiefly inside machines they generally impossible
    to watch inside of this, an operator will need to perform regular accurate
    check to identify whether any changes have take place in process condition.

    These process parameters have to be measure or control in some cases in alarm systems or protection devices need to be installed the most important process condition are:

    • Temperature
    • Pressure
    • Level
    • Flow


    Especial diagram can be use to indicate where in particle process which
    particle parameter in certain device measured and controlled
    this information display in PFD.

    A Process and Flow Diagram shows the basic structure of a processing plant.
    Symbols represent measurement and control devices, indicate
    where which parameters are measured and controlled,
    and display material and energy requirement.

    Beside PFD there are diagrams provides more details
    information on Piping and Instrumentation such as diagram
    called Piping and Instrumentation Diagram ,these diagrams contain
    information such as switches and signaling devices, power consumption
    and security or technical data.

    P&ID diagram shows the structure of a processing plant, indicating
    with the aid of symbols all the devices, piping systems and fittings
    as well as the various instrumentation and control function.

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