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Industrial Process Control: Standards

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Presentation on theme: "Industrial Process Control: Standards"— Presentation transcript:

1 Industrial Process Control: Standards
Nikhilbinoy.C Assistant Professor, ICE Department, N.S.S. College of Engineering, Palakkad.

2 Purpose To establish a uniform mean of designating instruments and instrumentation systems used for measurement and control.

3 Scope General The procedural needs of various users are different. The standard recognizes these needs, when they are consistent with the objectives of the standardly by providing alternative symbolism methods. A number of examples are provided for adding information or simplifying the symbolism as desired.

4 Scope Application to Industries Chemical. Petroleum. Power generation.
Air conditioning. Metal refining.

5 Scope Application to Work Activities Design sketches.
Teaching examples. Technical papers, literatures, and discussions. Instrumentation system diagrams, loop diagrams, logic diagrams. Functional descriptions. Flow diagrams: Process. Mechanical. Engineering. Systems piping (process) and instrumentation. Construction drawings. Specifications, purchase orders, manifests, and other lists.

6 Identification of the System

7 Each instrument may be represented on diagrams by symbols.
Instrument or function to be identified is designated by an alphanumeric code or tag number. The symbols may be accompanied by a tag number. FV101

8 Identification of the System (Tag Number)
TIC103 Instrument Identification or tag number

9 Identification of the System (Tag Number)
TIC103 Loop identification

10 Identification of the System (Tag Number)
TIC103 Loop number First number is used to identify the loop. The succeeding numbers is the serial number of the instrument in a particular loop.

11 Identification of the System (Tag Number)
TIC103 Function Identification Function of the instrument is identified.

12 Identification of the System (Tag Number)
TIC103 First letter Identifying the measured or initiating variable. May have a modifier is intended to represent a new and separate measured variable.

13 Identification of the System (Tag Number)
TIC103 Succeeding letters Identifying the function performed. Second letter is used for the readout or passive function. Third letter is used for the output function. The succeeding letters may have a modifier to identify a separate function.

14 Function Identification

15 First Letter Succeeding Letter Measured or Initiating Variable Modifier Read out or Passive Function Output Function A Analysis Alarm B Burner User’s choice C Control D Differential E Voltage Sensor F Flow rate Ratio G Glass H Hand High I Current Indicator J Power Scan K Time Time rate Control station L Level Light Low M Momentary Middle

16 First Letter Succeeding Letter Measured or Initiating Variable Modifier Read out or Passive Function Output Function N User’s choice O Orifice P Pressure Point Q Quantity Integrate R Radiation Record S Speed Safety Switch T Temperature Transmit U Multivariable Multifunction V Vibration Valve, damper W Weight, Force Well X Un classified X axis Y Event, state Y axis Compute Z Position Z axis Actuator

17 Symbols The symbols are intended to depict instrumentation on diagram and drawing.

18 Instrument Line Symbols
HS GS SS WS ES NS AS PA IA Instrument supply or connection to process Water Supply Nitrogen Supply Plant Air Steam Supply Electric Supply Instrument Air Gas Supply Air supply Hydraulic Supply The supply level may be added to the instrument supply line. E.g:- AS-100; ES-24DC Undefined Signals Pneumatic signal Electric Signal Hydraulic Signal Capillary Tube Internal system link (s/w or data link) Mechanical link Electric binary Signal

19 General Instrument or Function Symbols
Primary Location Normally Accessible to Operator Field Mounted Auxiliary Location Normally Accessible to Operator Discrete Instruments IP1 Shared Display Symbol Size may vary according to the user’s needs and the type of document. Abbreviations of the user’s choice such as IP1 (Instrument Panel 1), IC2 (Instrument Console 2), CC3 (Computer Console 3), etc. may be used when it is necessary to specify instrument or function location. Computer Function Programmable Logic Control

20 General Instrument or Function Symbols
Primary Location Normally Accessible to Operator Field Mounted Auxiliary Location Normally Accessible to Operator Discrete Instruments Shared Display Computer Function Programmable Logic Control

21 General Instrument or Function Symbols
Primary Location Normally Accessible to Operator Field Mounted Auxiliary Location Normally Accessible to Operator Discrete Instruments Normally in accessible, or behind-the-panel devices or functions may be depicted by using the same symbol but with dashed horizontal bars. Shared Display Computer Function Programmable Logic Control

22 General Instrument or Function Symbols
Primary Location Normally In-accessible to Operator Field Mounted Auxiliary Location Normally In-accessible to Operator Discrete Instruments Shared Display Computer Function Programmable Logic Control

23 Control Valve Body Symbols
General Symbol Three Way Valve Angle Four Way Valve Butterfly Globe Valve Rotary Valve Diaphragm Valve

24 Actuator Symbols Diaphragm, spring opposed or unspecified actuator
Diaphragm pressure balanced Rotary motor (shown typically with electric signal may be hydraulic or pneumatic) M

25 Actuator Symbols D Digital Spring opposed single acting Double acting

26 Actuator Symbols S Solenoid Electrohydraulic I/P TY
E/H Electrohydraulic I/P TY Valve actuator with attached electro pneumatic converter

27 Actuator Symbols For pressure relief or safety valve only
Hand actuator or hand wheel

28 Symbols for Self Actuated Regulators, Valves and Other Devices
FICV Automatic regulator with integral flow indication FI Indicating variable area meter with integral manual throttle valve Upstream alternative Downstream alternative Restriction orifice (orifice plate, capillary tube, or multistage type, etc.) in process line FO

29 Symbols for Self Actuated Regulators, Valves and Other Devices
Restriction orifice drilled in valve (instrument tag number may be omitted if valve is otherwise identified FO Flow slight glass, plain or with paddle wheel, flapper etc. FG Flow straightening vane (use of tag number is optional. The loop number may be the same as that of the associated primary element) FX

30 Symbols for Self Actuated Regulators, Valves and Other Devices
Hand control valve in process line HV Hand actuated on-off switching valve in pneumatic signal line HS 002 LCV Tank Level regulator with mechanical linkage

31 Symbols for Self Actuated Regulators, Valves and Other Devices
PCV Pressure reducing regulator, self contained with hand wheel adjustable set point PCV Pressure reducing regulator with external pressure tap PDC Differential pressure reducing regulator with internal and external pressure taps

32 Symbols for Self Actuated Regulators, Valves and Other Devices
PCV Back pressure regulator, self contained PCV Back pressure regulator with external pressure trap Pressure reducing regulator with internal outlet pressure relief valve, and optional pressure indicator PDC

33 Symbols for Self Actuated Regulators, Valves and Other Devices
PCV Pressure relief or safety valve, general symbol Pressure relief or safety valve, straight through pattern, spring or weight loaded, or with internal pilot Vacuum relief valve, general symbol PCV

34 Symbols for Self Actuated Regulators, Valves and Other Devices
PCV Pressure and vacuum relief valve, spring or weight loaded, or with internal pilot Vacuum Pressure

35 Symbols for Actuator Action in Events of Actuator Power Failure
Two way valve, fail open Two way valve, fail closed Three way valve, fail open to path AC A B C

36 Symbols for Actuator Action in Events of Actuator Power Failure
D Four way valve, fail open to paths CB and DA A B C Any valve, fail locked (position does not change) Any valve, fail indeterminate

37 Primary Element Symbols
AIT 001 AIT 002 Dual analysis indicating One burner ultra-violet flame detector connected to analog type flame intensity indicator BE 001 BI 002

38 Primary Element Symbols
BE 001 BE 002 Two burner flame rod sensor connected to common switch BS 003 S TV Television camera and receiver to view burner flame BT BG 003

39 Primary Element Symbols
FI 005 Orifice plate with flange or corner taps connected to differential pressure type flow indicator VC Orifice plate with vena contracta taps FE 002

40 Primary Element Symbols
Orifice plate with vena contracta, radius, or pipe taps connected to differential pressure type flow transmitter FT 008 Venturi tube

41 Primary Element Symbols
Variable area flow indicator FI 017 Flow element with connection for controller FE 017 FC 018

42 Primary Element Symbols
FT 017 Flow element integral with transmitter Vortex sensor FE 005

43 Primary Element Symbols
FE 029 Flow nozzle Indicating wattmeter connected to pump motor JI 001

44 Primary Element Symbols
Clock KI 001 Time schedule controller, analog type, or self contained function generator KC TIC

45 Primary Element Symbols
VI 001 VI 006 Mechanical analysis in three planes VXT 002 VYT 003 VZT 007 VXI 004 VYI 005 VZI 008

46 Primary Element Symbols
1-0 JI 001 Self contained on-off room thermostat actuating circulating pump motor Cascade control: flow controller set by level control SP LC 104 FC 100 FT

47 Primary Element Symbols
Differential temperature indicator TT 101 TDI 103 TT 102 FT 101 FR 104 Flow ratio controller with two pens to record flow FFC 103 FT 102 FR 105

48 Primary Element Symbols
FT 101 Flow ratio controller with one pen to record flow ratio FFC 103 FT 101 Mass flow computation performed by mass-flow computing relay ‘FY’ having linear inputs for pressure and temperature and a non-linear input for flow TT 117 FIC 111 FY PT 201 FT 101 GS Mass Flow

49 Primary Element Symbols
Flow transmitter with external temperature compensator TT 300 FT 400 FY TRC 302 Pressure balanced valve

50 Primary Element Symbols
TSL 301 PSH 501 TSL 301 PSH 501 M FY M FIC 404 FIC 404 Flow control loop that may be blocked by interlock actuated by either low temperature or high pressure

51 Heat Transfer Elements
Water cooled exchanger Water cooled condenser Shell and tube exchanger

52 Pumps and Compressors Centrifugal Reciprocating Rotary Blower or fan

53 Process Pressure Vessels
or Horizontal drums or Vertical drums

54 Thank You


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