piping instrumentation

7/28/2019 Piping Instrumentation

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Piping & Instrumentation

DiagramsNorman G. Stone

Dean Foods Company

Director of Engineering Safety &Environmental Affairs

1415 East 5050 South

Ogden, UT 84043801.629.4503 office

801.791.6682 cell


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P&IDs

Piping & Instrumentation Diagrams

Some people say PI&Ds

Draw with operator and trainee in mindDraw so that you can see inside the

vessels

Ammonia refrigeration slant


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PSM/RMP Recent Results

Nationally (my opinion) not good, if it is basedon recent incidents

California very good

Dean Foods Company very good Factors in DF results:

Importance of refrigeration

System age/proven/bugs ironed out

Cows produce every day so most of our plants run24/7

Knowledgeable operators

Training


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Ammonia Refrigeration

Temperature is Determined by the Pressure

Boiling point is minus 28 F at 0 psi (sealevel)

33 psig = 20 F

25 psig = 12 F

151.7 psig = 85 F

8.8 Hg = minus 40 FWeighs approximately 5 lbs per gallon

varies some based on temperature


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Standard Symbols

Consensus not Mandatory

ISA International Society of Automation

(Formerly Instrument Society of America)67 Alexander Drive

P.O. Box 12277

Research Triangle Park, NC 27709

(919) 549-8411

[email protected]


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Standard Symbols

Consensus not MandatoryANSI/ISA-5.1-2009

ISA-5.1-1984 (R1992)

Formerly ANSI/ISA-5.1-1984 (R1992)

Google Search

ansi isa S5.1 then select

S51-ANSI removed.fmCopyrighted document


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Selected Products Available

from ISA

P&ID Clip Symbols Version 2.0 (CD)

$99.00/$90.00Reading a P&ID $69.00/$60.00

Control System Documentation: Applying

Symbols and Identification, 2

nd

EditionAnnual Membership $100.00


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Piping & Instrumentation

Diagrams For any Process

Food Processes

Chemical Processes Petroleum Processes

Air Conditioning

Ammonia Refrigeration Processes


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Definition of Piping and

Instrumentation Diagram

A piping and instrumentation

diagram/drawing (P&ID) is a diagram inthe process industry which shows thepiping of the process flow together withthe installed equipment and

instrumentation.


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Definition of Piping andInstrumentation DiagramInstitute of Instrumentation andControl

A set of drawings that describe aprocess

A set of drawings that provides sufficientinformation to enable anyone who has areasonable amount of (ammonia

refrigeration) process knowledge tounderstand the process


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Uses of P&IDs

Essential tool in preparing & implementingCalARP, PSM & RMP

Emergency Preparedness

Design stage (Planning a job) Visual reference line branches, valving,

sensors, etc.

Process Hazard Analysis & Revalidations

Incident Investigation Operating Procedures (SOPs)

Role in modification (MOCs)


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Uses of P&IDs

Demonstrate the physical sequence ofequipment and systems

Role in maintenance (Troubleshooting) Key piping and instrument details

Control and shutdown schemes

Safety and regulatory requirements Basic start up and operational

information


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Uses of P&IDs

Operator understanding andcommunicating about a process

Records as-built state of the process(Maintaining a process operation)

Training (trainees trace P&IDs)

Writing a job safety analysis (JSA)

Lockout/Tagout

Writing pump-out procedures


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NOT INTENDED USE P&IDs

Emergency Responders


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What Belongs on NH3 P&ID

Title Block

Ammonia Piping, Sizes and

IdentificationsAll Valves and their Identifications

including Safety Relief Valves

King Valves Identification

Purge Valves, Vents, Drains, SpecialFittings and Reducers


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Pressure Vessels, Compressors, Condensers,Evaporators, Heat Exchangers, Pumps,Purgers and Transfer Equipment.

Regulators, Level Probes & Float Switches,Level Indicators and Solenoid Valves

Controls

Valve & Line Designations/Numbers andEquipment Identification


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Gauges & Purge Valves

Ammonia Sensors Locations / Control

Safety Relief Valve Specifications Flow Direction

Line Sizes & Reducers

MAWP & MDMT for Vessels


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What is not Necessary on

P&IDsColor Coding

Equipment to Scale

Non-Process Equipment & Lines Professional Draftsmen

All on Single Page

Excessive Text - (Find Detailed ProcessSafety Information on ASME DataSheets, Factory Dwgs., etc)


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Scale of P&IDs

No Scale

All line widths normally the same

A short line may appear longer than along line

Two lines that cross over each otherwithout any break means those twopipes are actually connected simplespace or U


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Verification of P&IDs

Verify against field conditions

Visually check every line, safety relief

valve, valve or other P&ID Item againstthe as-built system


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Electronic or Paper Versions

of P&IDsAutoCAD drawings are very nice

Attributes permit adding visible & hiddentext

Can print attributes

Difficult to draw and takes more time

Easier to change

Pencil & Paper drawings acceptableA symbol for a certain type of valve may

look slightly different from plant to plant


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Symbols for NH3 Ref. P&IDs

Globe Valves


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Angle Valves


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Other Valves


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Other Valves


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King Valve


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Flags & Flow Direction


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Symbols for NH3 Ref. P&IDsFloat Switches & Solenoid Valve


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Vessel Level Column


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3 Way Valve & Dual SRVs


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Air to Ammonia Multiplier


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Lines


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P&ID NOTEBOOK

P&IDS

Flow Diagrams

Equipment List

Line List

Valve List

SRV List

ASME Manufacturers Data ReportsAmmonia Inventory

Equipment Drawings


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QUESTIONS??

piping instrumentation

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