Pressure Vessel

A Pressure Vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. Pressure vessels can be dangerous, and fatal accidents have occurred in the history of their development and operation. Pressure Vessels are containers which are designed to hold liquids or gases at high pressures, usually above 15 psig.

TEC Design involves parameters such as maximum safe operating pressure and temperature, safety factor, corrosion allowance and minimum design temperature (for brittle fracture). Construction is tested using nondestructive testing, such as ultrasonic testing, radiography, and pressure tests. Hydrostatic tests use water, but pneumatic tests use air or another gas. Hydrostatic testing is preferred, because it is a safer method, as much less energy is released if a fracture occurs during the test.


Types of Pressure Vessel according to use,

  • Storage Vessels

  • Heat Exchangers

  • Process Vessels

Based on orientation

  • Horizontal pressure vessel

  • Vertical pressure vessel

Based on manufacturing methods

  • Welded vessels

  • Forged vessels

  • Multiwall vessels

Based on Geometric shapes

  • Cylindrical vessel

  • Stationary tank for Storage (above ground/underground) 

  • Mobile tank for Transport 

  • Spherical vessel

  • Rectangular vessel

Main components of pressure vessel

  • Shell

  • Head

  • Nozzle

  • Support