What are the factors to be consider in designing a pressure vessel?

The necesaary factors that shall be considered for designing pressure vessel as per ASME Sec VIII requires following minimum considerations:

1. Design Pressure, 

2. Design Temperature, 

3. Maximum Allowable Working Pressure (MAWP),

4. Minimum Design Metal Temperature (MDMT),

5. Service & Process purpose/ description,

6. Joint Efficiency

7. Corrosion Allowance

8. Nominal thickness

9. Head types

10. Site data for wind and seismic parameters,

11. Loads & Load Combinations

12. Stress Analysis, including Thermal analysis, Fatigue analysis and Local stress analysis, as applicable

13. Material of Construction 

14. Vessel orientation- whether vertical or Horizontal

So many factors....

Fluid Service

Design and operating pressure

Design and operating Temperature

Corrosion allowances

vessel capacity

low levels and high levels

....etc

when designing a pressure vessels we need to consider the size, maximum pressure  and operating pressure of a pressure vessel, in order to use the right materials for it.

1.WORKING TEMPERATURE

2.WORKING PRESSURE

3.WORKING FLUID IE. LETHAL OR NONLETHAL

4.IMPACT TEST REQUIREMENT

5.JOINT EFFICIENCY

6.DESIGN CODE

7.HYDROTEST PRESSURE

8.MATERIAL OF CONSTRUCTION

9.SEISMIC & WIND LOADING

10.VERTICAL OR HORIZONTAL

11.DISH END TYPE

12.SADDLE TYPE

13.LIFTING ARRANGEMENT

14.VOLUME

15.DENSITY OF FLUID 

16.NUMBER OF NOZZLES 

17.RF PAD THICKNESS SIZE FOR NOZZLE OPENINGS 

18.NO OF MANHOLE ,DRAIN AND VENT WITH SIZE.