H2S Zone Classification

For facilities which handle H2S, areas are classified based on the level of risk posed by H2S. The H2S Zone Classification study identifies the low, medium and high-risk areas in the facility and specify access controls and precautions to be adopted when entering classified areas. Generally, three H2S zones are specified in a facility:

  • Red Zone – Risk of fatality
  • Yellow Zone – Risk of injury
  • Green Zone – Risk of short term nausea, irritation

H2S Zone Classification

For facilities which handle H2S, areas are classified based on the level of risk posed by H2S. The H2S Zone Classification study identifies the low, medium and high-risk areas in the facility and specify access controls and precautions to be adopted when entering classified areas. Generally, three H2S zones are specified in a facility:

  • Red Zone – Risk of fatality
  • Yellow Zone – Risk of injury
  • Green Zone – Risk of short term nausea, irritation