Pressure Vessel & Piping Design

Question 1

What are the 4 most common vessel Head styles?

Answer 1

Hemispherical
Ellipsoidal
Torispherical
Flat

Question 2

Which head is the least mechanically efficient(Torispherical, Ellipsoidal, Hemishperical, or Flat)?

Answer 2

Flat, Cheapest but requires thicker wall.

Question 3

Which head is the most mechanically efficient (Torispherical, Ellipsoidal, Hemispherical, or Flat)?

Answer 3

Hemispherical, also the most expensive

Question 4

What is the 7 step pressure vessel design process?

Answer 4

• Define requirements (pressure, temperature, ,media, cycle life, etc.)
• Determine applicable codes
• Perform analysis per applicable codes
• Consider fatigue for high cycle life parts
• Consider material compatibility issues
• Ensure design also meets test of reason - view code requirements as design minimums
• Documentation must include calculations, weld requirements, MAWP, and pressure qualification test requirements