What is P&ID

Basic Engineering document

Indicating -Process Requirement -Equipment in the Plant -Piping and Piping Component -Instrument and Logic Relations

What should be indicated on P&ID?

Process requirement

- PFD : all line and flow, every item

- not on PFD : relieving system, pump minimum flow,

compressor anti surge flow, isolation system

- item for maintenance, operation, pre-commissioning,

commissioning, start-up

What should be indicated on P&ID?

Equipment

- all equipment with exact number and components :

all nozzles, manholes, internals

- type of connection to piping

- equipment item number, service name, major

specification

What should be indicated on P&ID?

Piping

- all lines for normal operation, startup, shutdown,

emergency, special operation, and maintenance

- all piping components (valves etc.) and

notes on them (CSO, CSC, TSO)

- line information : line no., size, fluid symbol,

piping service class, insulation

- configuration requirement : No Pockets, Free Draining

What should be indicated on P&ID?

Instrumentation

- instrumentation for controlling, monitoring, emergency shutdown,

sequence control, interlock, automatic start/stop

- field instrument

- control and shutdown valves with their type, size, failure status

- pressure relief valves with their set pressure and size

- kind of signal : pneumatic, electric, hydraulic, capillary tubing,

softlink

What should be indicated on P&ID?

Other

- battery limit between client and contractor

- area battery limit

- change of responsibility between Piping and Instrument,

Contractor and Vendor

- extent of packaged equipment supply

- breaks of line information :

line number, piping service class, insulation

What information can you get? For Equipment

Outline/Internals

For Piping Line No./Size/Material/Insulation/Line Configuration/Piping Component Type

For Instrument Tag No./Function/Control Method

P&ID is used for

Detail Engineering of each disciplines Piping layout/Material Purchase Instrument Logic/DCS Plan, etc

Planning of Construction/Commissioning/Plant Operation/Maintenance

P&ID

IFA

How to Develop/Finalize Process

Verification

Proj.Spec

Discipline

Comments

P&ID

IFH

P&ID

IFC

P&ID

As

Built

Company

Comments

HAZOP

SIL Study, etc.

Detail Design

Feedback

Vendor Data

Input

Field Change

Feedback

P&ID Symbols

P&ID Symbols

P&ID Symbols

P&ID Symbols

P&ID Practices

Control valve loop

1

FC

4” 300#

PC 005

PY 005

PV 005

I/P

H

L

PT 005

4”

LT/FT Cascade Control

FC

4” 300#

FV 102

4”

6”-PL-10042-AA11-N

FT 102

FE 102

300#

LT 105

DISP

SP

LI 105

H

L

FC 102

6”-PL-10042-AA11-N

Split range control(1)

1

H

L

PT 001

I/P

8”-PG-10043-AA11-N

FC/TSO 4” 300#

PY 001D

PV 001B

I/P

6”-PG-10042-BA21-N

FC

4” 300#

PY 001C

PV 001A

a

2xa

2x(a-50)

0 100 PIC OUTPUT

100

0

A B

CV

OP

EN

ING

6”

6”-PG-10043-BA21-N

6”

4”

PY 001A

PY 001B

P

PC 001

Split range control(2) 1

2”-PG-10102-AA11-N

I/P

3”-PG-10101-AA11-N

1-1/2”

PY 001D

PY 001A

a

2x(50-a) 2x(a-50)

0 100 PIC OUTPUT

100

0

A B

CV

OP

EN

ING

I/P

FC 1”

PY 001C

PV 001A

PC 001

AH

AL

PT 001

FC

PV 001B

2”

3”

1-1/2”

2”

PY 001B

Place equipment and its components

Connect main piping

Complete control valve loop

Place other instrument and connect signals

Indicate safety devices incl. alarm

Place piping components (Valve/Fitting) as required

Check detail and add items required incl. vent/drain connection