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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.
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