Deatailed explanation of “How to read a Piping and Instrument Diagram(P&ID)?”

This topic is already(Piping and instrumentation diagram) discussed in instrumentpedia. But now I feel that more explanation is required on this topic.That is why I decided to write a detail post about it. For reading a piping and instrumentation diagram someone should be very much familiar with the symbols.We can classify the instruments in to …

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How to find out the Full load current [Relation between horse power and kilo watt] and how to select a proper cable [Power cable size selection chart]

In previous posts i have explained about electrical drawings, electrical panel component etc.. For smooth working of motor which is connected to the mcc panel, cable size selection has an important role. We have to consider lot of things for selecting a proper cable, like motor rating (Kilowatt,Horse power),Voltage(230v, 415 v etc.),Phase(Single, 3 phase),Temperature, Distance …

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How to read electrical relay diagram? [Standard symbols used for drawing electrical relay diagram]

In one of the previous post in instrumentpedia I have described how to read an electrical drawing. Now lets look what is electrical relay diagram. Here I am giving the standard symbols used for the electrical relay diagram. In earlier days instead of PLC or DCS like controllers relays are used as controllers. Nowadays also …

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Meters used in the MCC panel.

Different types of meters are used in the MCC panel for indicating the status of the panel.Mainly three types of meters are used. Ammeter, Volt meter, Watt meter, Energy meter. Analog and Digital type meters are using nowadays. Ammeter An instrument used for measuring the current flow in the circuit is called ammeter. It should be …

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What is a control panel?. What are the components in a control panel?

CONTROL PANEL Control panel is a cabinet which contains electrical components to control the motors and equipments. CABLES Cables are used for the interconnection. Two types of cables are used. Power cable and control cable. 1. Power cables (which is used to connect the motor to panel component and panel to main supply) 2. Control …

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E book:Instrumentation construction engineering.

Insrumentation construction engineering is a handbook for instrumenation engineers who is working in construction field.Following chapters are included in the e-book. Instrumentation Documents. 1. Instrument index. 2. Instrument data sheet 3. Cable schedule 4. Bill of material Instrumentation Drawing 1 . JB & Instrumentation location drawing. 2. GA Drawings. 3. Piping instrument drawing. 4. Hook …

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What is hook up drawing? and How to read a hook up drawing?

Drawings which represents installation standards is called hook up drawings. With hook-up drawings, engineer can understand how an instrument to be installed in the plant. With hook-up drawing, we can calculate the material requirement. Two types of hook up drawings are there. 1. Pneumatic hookup. It is independent of process connection. Pneumatic hookup is basically …

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P&ID (Piping and instrument diagram) & PFD (Process flow diagram).

P&ID: Schematic illustration of instruments and their interconnection is called P&ID. PFD:Process flow diagram.PFD gives an overview of the plant process.PFD is a simplified version of P&ID. Symbols,circles and lines are used to represent instrument and their interconnection.For identifying instruments and pipe lines tag numbers are used.For reading P&ID(Piping & instrument diagarm) one must be …

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What is Instrument location layout and Junction box location layout?

What is an instrument location layout? Instrument location layout is a layout which indicates the exact location of instrument/junction box, trench/trays etc. Trench and duct is the path for primary cable and tray is the path for secondary cables. A tray is either made of metals or FRP (Fiber reinforced plastic). What is Junction box …

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