process flow / instrumentation drawings p&fd / p&id · 2019. 6. 3. · the process flow...
TRANSCRIPT
Process Flow / Instrumentation
Drawings – P&FD / P&ID
Prepared by the Training Coordination
Committee, PNWS-AWWA
Version – 1.0, January 2019
It’s a story told through Symbology
Acknowledgements:
AuthorButch Perry | KCWTD Infrastructure Coordinator
Jeff Lundt | KCWTD Senior Engineer
Content & Goals
To provide an understanding of what process flow and
instrumentation drawings can tell us about how things work
Symbology
An 1877 dictionary defines the word as: "the art of expressing through symbols."
Outline:
Workshop topics
Understanding a P&ID Layout
- The difference between P&ID and PFD
- Symbology
- Equipment
- Piping that connects the equipment
- Lines and instruments used to monitor
and control the process
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Symbols
Toki
KoruHei-Matu
Symbols & Story Telling
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Earliest forms of communication during the prehistoric period were the Hieroglyphics and cave drawings
Evolution of Symbols
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The Basics
• There are standards for symbols:
– AutoCAD P&ID ISA – International society of automation– AutoCAD P&ID PIP – Process Industry Practices– AutoCAD P&ID ISO – International Organization for
Standardization
• User defined “unique” symbols
• Use the symbol guide for the P&ID’s you are reading.
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Where Can P&IDs Used?
• Everywhere in our conveyance and
treatment systems:
– Operator Training
– Developing SOP’s
– Process Troubleshooting
– Conveyance Information
– Storage Information
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Where Can P&IDs Used?
• Everywhere in our conveyance and
treatment systems:
– Chemical feed systems
– Hazard monitoring type and location
– Sampling type and location
– Security
– Auxiliary services
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PFD / P&ID Differences
The Process Flow Diagram
• Shows the flow of process and the
equipment involved in the process.
• Shows the relationships between the
major components minus the details.
• Are sometimes used for visitor
information and new employee training.
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A PFD should include:
• Process Piping
• Major equipment symbols, names and identification numbers
• Control, valves and valves that affect operation of the system
• Interconnection with other systems
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A PFD should include:
• Major bypass and recirculation lines
• Sometimes system ratings and operational values as minimum, normal and maximum flow, temperature and pressure
• Composition of fluids
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More Basics
• Process always flows from left to right
• The whole process doesn’t always fit on one drawing
• Drawing numbers on the left side tells where the process is coming from
• Drawing number on the right side tells where the process is going to
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Header
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Photo captionPhoto caption
Process Flow Diagram
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The Process & Instrumentation Diagram
• Process & Instrumentation Diagram
(P&ID) show what is in the PFD
– plus the instrumentation to monitor the
process
– plus how it is controlled.
• A P&ID shows the relationships
between the all components in the
system and shows details.
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How A P&ID is Set Up
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Process flow diagram is shown here
Local control is shown here
Remote control & monitoring is shown hereD
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A P&ID Should Include:
• Instrumentation and designations
• Mechanical equipment with names & numbers
• All valves & their identifications
• Process piping, sizes & identification
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A P&ID Should Include:
• Miscellaneous – vents, drains, special fittings,
sampling lines, reducers & increasers
• Permanent start-up & flush lines
• Flow directions
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A P&ID Should Also Include:
• Interconnections references
• Control inputs and outputs, interlocks
Interfaces for class changes Seismic category
• Quality level
• Annunciation inputs
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A P&ID Should Also Include:
• Computer control system input
• Vendor and contractor interfaces
• Identification of components and subsystems
delivered by others
• Intended physical sequence of the equipment
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A P&ID Should Not Include:
• Equipment rating or capacity
• Manual switches and indicating lights
• Primary instrument tubing and valves
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A P&ID Should Not Include:
• Pressure temperature and flow data
• Elbows and similar standard fittings
• Extensive explanatory notes
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P&IDs
Work With the Process Narratives
Process narrative is the text description
of the process, associated
instrumentation, monitoring & control:
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• Operating set points
• Decision trees
• Describes the process
• Describes the equipment
• Manual operation
• Automatic operation
Who Uses P&IDs?
YOU DO! When:
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• Planning a project
• Writing a job safety analysis
(JSA)
• Lockout before a repair or
maintenance
• Troubleshooting when
problems arise
• Process hazard review
• Training new employees
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Graphic from KCWTD Color can help understanding
Break Time
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What The Parts Tell Us – Title Block
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Images from KCWTD
Abbreviations
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Instrument Identification
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Images from KCWTD
Line Legend
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Tag Numbers
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Interface Symbols
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Construction Status
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Valve Symbols
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Gate Symbols
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Actuator Symbols
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Mechanical Equipment Symbols
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Primary Element Symbols
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Miscellaneous Symbols
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Functional Logic Diagrams
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Header
(Analog = continuous)
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(Discrete = on/off)
Instrumentation Identification
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An Example
Alki CSO Treatment Plant
Sodium Hypochlorite System
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Examples
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Sludge Dewatering Centrifuge No.1
FV 17BG011
FV 17BG011
PE 17B013
FV17BA011 / P17BA011
FV17BA011 / P17BA011
FV17BA011 / P17BA011
PE 17BA011
FE 178D011
FV 178B011
Identify what is in each circle and which table is used to find the information
Identify what is in each circle and which table is used to find the information
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Questions, Comments and
Suggestions?
Kyle Kihs | PNWS-AWWA Executive [email protected]
Loren Searl | TCC Chair lsearl@[email protected]
Prepared by the Training Coordination
Committee, PNWS-AWWA