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. Chemical piping system 2. Piping system symbols
3. Piping instrumentation
4. Pipe drawing

3. Chemical piping system
The term piping can refer to any kind of pipe used in a wide range of applications.
Piping is used to transport fluids between storage tanks and processing equipment is called process piping.

4. Chemical piping system
Types of Pipe
Steel Pipe: Carbon steel pipe is the preferred above ground pipe used in industry today. It is strong, relatively durable and can be welded and machined.
Copper pipe: and copper alloys are corrosion resistant and have excellent heat transfer properties. Often used in residential water lines, however, plastic pipe is becoming more prevalent in residential water lines.
Plastic Pipe: PVC (Polyvinyl Chloride) pipe is used for acids, salt solutions, alcohols, crude oil and other corrosive chemicals. PE (Polyethylene) is used for higher temperatures (up to 105 degrees F) and is suitable for water lines, sprinkler systems etc.

5. Piping system symbols

6. Piping system symbols

7. Piping instrumentation
How to connect pipe??
Welded
Butt-welded
Socket-welded
Solvent-welded
Screwed
Flanged
Soldered
Bell and spigot

8. Piping instrumentation
How to connect pipe??
Welded joints

9. Piping instrumentation
Pipe fittings
Enable pipe to change direction and size
Provide for branches and connections
Types
Welded
Screwed
Welded Fittings

10. Piping instrumentation
Pipe fittings
Screwed fittings

11. Piping instrumentation
Piping Insulation
Prevent heat loss/ gain
Prevent condensation – below ambient
Personnel protection – over 125oF
Freeze protection – outdoor cold climates
Fire protection
Noise control

12. Piping instrumentation
Piping Insulation
Fiberglass Insulation w/ Asbestos plastered fitting coverings

13. Piping instrumentation
Piping Insulation
Metal Jacketed insulation covering

14. Piping instrumentation
Valves
Purpose
Provide on/off service
Control and regulate fluids
Maintain constant pressure
Prevent pressure buildup
Prevent backflow

15. Piping instrumentation
On/Off Valves
Gate
Exclusively provide on/off service
Fluid flows with minimal friction and pressure loss
Used to block flow

16. Piping instrumentation
Regulating Valves
Globe
Regulates pressure
Used to regulate flow

17. Piping instrumentation
Backflow Valves
Check Valves:
Used to prevent backflow
Piston check

18. Piping instrumentation
Safety Valves
Keep pressures at or below a given point

19. Piping instrumentation
Ball Valve
Typically used as block valve
Cut-away shows ball and seat

20. Piping instrumentation
Butterfly Valve
Can be used for flow control or on/off

21. Piping instrumentation
Control Valve
Instantaneous control and adjustment
Flow
Pressure
Temperature
Contains a controller, or actuator
Operation
Electric motor
Air or hydraulic cylinder

22. Piping instrumentation
Valves symbols

23. Pipe drawings
Double- and Single-Line Drawings

24. Pipe drawings Piping Drawings Requirements Pipe length dimensions
Location of fittings and valves
Size and type of valves and fittings
Pipe diameter, contents, and identification number

25. Pipe drawings
Piping Details

26. Pipe drawings
Piping Isometric

27. Pipe drawings
Piping Isometric

28. Pipe codes Organizations for Piping Codes
ASME - American Society of Mechanical Engineers, one of the leading organizations in the world developing codes and standards
ANSI - American National Standards Institute, provides a forum for development of American national standards
DIN - Deutsches Institut für Normung (Germany)
ISO - International Organization for Standardization

29. Pipe codes ASME Codes B31.1 – Power Piping
B31.2 – Fuel Gas Piping, WITHDRAWN superseded by ANSI Z223.1
B31.3 – Process Piping, (formerly Chemical Plant and Petroleum Refinery Piping)
B31.4 – Liquid Hydrocarbon Transportation Piping (oil cross country pipelines)
B31.5 – Refrigeration Piping
B31.6 – Chemical Plant Piping, never issued as a separate document, folded into B31.3

30. Pipe codes
ASME Codes
B31.7 – Nuclear Power Piping, WITHDRAWN, superseded by ASME Code, Section III
B31.8 – Gas Transportation Piping (cross country gas pipelines)
B31.9 – Building Services Piping (office building hot water heating and air conditioning)
B31.10 – Cryogenic Piping, never issued as a separate document, folded into B31.3
B31.11 – Slurry Transportation Piping (cross country coal/water slurries)

31. Pipe codes Aboveground codes Buried codes B31.1 B31.4 B31.3 B31.8
The following division of the codes is done on the type of piping
Aboveground codes
Buried codes
B31.1
B31.4
B31.3
B31.8
B31.5
B31.11
B31.9

33. Thank You !