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16/17 Semester 2
Chemical Engineering Drawing
Instructor: Rama Oktavian
Email: [email protected]
Office Hr.: M. 10 – 12, T. 10 – 12, W. 09 – 10, F.10 – 15
Outlines
1. P&ID definition
2. P&ID symbols
3. P&ID drawing
Block Flow
Diagram (BFD)
ProcessP&ID
Flow
Diagram (PFD)
PROCESS
DIAGRAMS
Process equipments
symbol and
numbering
Piping and
Instrumentation
Diagram (P&ID)
BFD
P&ID
Piping and Instrumentation Diagrams or simply P&IDs are the
“schematics” used in the field of instrumentation and control
(Automation)
The P&ID is used to by field techs, engineers, and operators to
better understand the process and how the instrumentation is
inter connected.
Contains: plant construction information (piping, process,
instrumentation, and other diagrams)
P&ID
Also known as “PROCESS & INSTRUMENTATION DIAGRAM”
Detailed graphical representation of a process including the
hardware and software (i.e piping, equipment, and
instrumentation) necessary to design, construct and operate the
facility.
P&ID
Basic Loop
Process
Sensing Element
Final Control
Element
Measuring
Element
Transmit
Element
Control Element
Transmitter
P&ID
Basic Loop
Set point
Controller
Transmitter
Fluid
Fluid
Orifice (Flow
Sensor)
P&ID
Temperature process
P&ID
Temperature process
P&ID
ISA S5.1 Identification Letters
P&ID
Example
P&ID
Instrument location
P&ID
Instrument location
Instruments that are field mounted.
-Instruments that are mounted on process plant (i.e sensor that
mounted on pipeline or process equipments.
Field
mounted on
pipeline
P&ID
Instrument location
Instruments that are board mounted
-Instruments that are mounted on control board.
P&ID
Instrument location
Instruments that are board mounted (invisible).
-Instruments that are mounted behind a control panel board.
P&ID
Shared display/shared control
P&ID
Shared display/shared control
Instruments that are functioned in Distributed Control System (DCS)
- A distributed control system (DCS) refers to a control system usually of
a manufacturing system, process or any kind of dynamic system, in which
the controller elements are not central in location (like the brain) but are
distributed throughout the system with each component sub-system
controlled by one or more controllers. The entire system of controllers is
connected by networks for communication and monitoring.
P&ID
Summary of instrument type and location
P&ID
Instrumentation symbol
P&ID
Signal line symbol
P&ID
Valve symbol
P&ID
Principle of P&ID
Example 1
With using these following symbols;
LC
LV 100
LC
V-100
LT
Complete control loop for LCV 101
LCV 101
P&ID
Principle of P&ID
Example 2
V-100
With using these following symbols;
PE
Where PE is locally mounted
on V-100
PT
Where PT is locally mounted
PIC
Where PIC is function in DCS
Draw control loop to show that PRV-100
will be activated to relief pressure when
the pressure in the V-100 is higher than
desired value.
P&ID
Principle of P&ID
Example 2
With using these following symbology;
PRV-100
PE
V-100
PIC
PE
Where PE is locally mounted
on V-100
PT
Where PT is locally mounted
PIC
Where PIC is function in DCS
PT
Draw control loop to show that PRV-100
will be activated to relief pressure when
the pressure in the V-100 is higher than
desired value.
P&ID
pHIC 2
Principle of P&ID
CV-102
TK-102
pHT 2
pHE 2
pHIC 1
pHE 1
TK-100
(pH adjustment tank)
CV-101
pHT 1
pHTE
2
pHT 2
pHIC 1
pHIC 2
The diagram shows pH
adjustment; part of waste water
treatment process. With using
above symbols, draw control
loop where the process need is:
(base feed tank)
pHT 1
pHE 1
TK-101
(acid feed tank)
The process shall maintained at
pH 6. When the process liquid
states below pH 6, CV-102 will be
opened to dosing NaOH in the
base feed tank. When the
process liquid states above pH 6,
CV-101 will be operated to
dosing HCl in the acid fed tank.
P&ID
P&ID
P&ID
P&ID