1. Chemical Engineering Drawing
16/17 Semester 2
Chemical Engineering Drawing
Instructor: Rama Oktavian
Office Hr.: M. 10 – 12, T. 10 – 12, W. 09 – 10, F.10 – 15

2. Outlines
1. P&ID definition
2. P&ID symbols
3. P&ID drawing

3. PROCESS DIAGRAMS P&ID Block Flow Diagram (BFD)
Process Flow Diagram (PFD)
PROCESS DIAGRAMS
Process equipments symbol and numbering
Piping and Instrumentation Diagram (P&ID)

4. BFD

5. 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)

6. 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.

7. P&ID Basic Loop Process Sensing Element Measuring Element Transmit
Control Element
Final Control
Transmitter

8. P&ID Basic Loop Set point Controller Transmitter Fluid Fluid
Orifice (Flow Sensor)

9. P&ID
Temperature process

10. P&ID
Temperature process

11. P&ID
ISA S5.1 Identification Letters

12. P&ID
Example

13. P&ID
Instrument location

14. 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

15. P&ID Instrument location Instruments that are board mounted
-Instruments that are mounted on control board.

16. P&ID Instrument location
Instruments that are board mounted (invisible).
-Instruments that are mounted behind a control panel board.

17. P&ID
Shared display/shared control

18. 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.

19. P&ID
Summary of instrument type and location

20. P&ID
Instrumentation symbol

21. P&ID
Signal line symbol

22. P&ID
Valve symbol

23. P&ID Principle of P&ID Example 1 V-100
With using these following symbols;
Complete control loop for LCV 101
V-100 LC LC
LV 100 LT
LCV 101

24. P&ID Principle of P&ID Example 2 V-100
With using these following symbols;
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.
Where PE is locally mounted on V-100
V-100 PE PT
Where PT is locally mounted
PIC
Where PIC is function in DCS

25. P&ID Principle of P&ID Example 2 V-100
With using these following symbology;
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.
PRV-100
Where PE is locally mounted on V-100
V-100 PE PE
PIC PT
Where PT is locally mounted PT
PIC
Where PIC is function in DCS

26. P&ID
pHIC 2
Principle of P&ID
pHE 1
pHT 1
pHIC 1
pHTE 2
pHT 2
pHIC 2
CV-102
TK-102
(base feed tank)
The diagram shows pH adjustment; part of waste water treatment process. With using above symbols, draw control loop where the process need is:
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.
pHT 2
pHT 1
pHIC 1
pHE 2
pHE 1
CV-101
TK-100
(pH adjustment tank)
TK-101
(acid feed tank)

27. P&ID

28. P&ID

29. P&ID

30. P&ID

32. Thank You !