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Introduction to Pressure Vessel Safety Awareness Tutorial

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What is a Pressure Vessel

Definition of a Pressure Vessel:

A pressure vessel in a broad sense or broad definition is a pressure vessel is any container that has pressure that is different than atmospheric pressure. Also, any container...vessel that has the potential to pressurize should be considered a pressure vessel.

How many types of pressure vessels are there?Pressure Vessel Safety Awareness and Risk Assessment Seminar

There are many types, but here are a few-

  • Thinned wall
  • Thick walled
  • Storage tanks
  • Transportable Containers
  • Propane bottles
  • Gas cylinders

A pressure vessel in a broad sense or broad definition is a container that holds a liquid, vapor, or gas at a different pressure other than atmospheric pressure at the same elevation. You could even say that a carbonated soda bottle is a pressure vessel. In fact, there is over 15-psi of pressure in a high carbonated soda bottle. We must be practical too.

Question: Is a container with a vacuum inside a pressure vessel?

A.) Yes;

B.) No    

C.) Special Rules Apply


A.) A vacuum in a vessel is categorized as a pressure vessel in a broad sense.

A pressure vessel in as defined by the ASME Boiler and Pressure Vessel Code more narrowly defined.

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