What is a job hazard analysis?

JHA is a systematic approach used to analyse all the possible hazards that may exist at a certain place or in a certain activity at a given moment of time and is used to identify the most appropriate type, quality and number of controls or barriers that are needed to prevent the hazards from being released and causing harm.

WHEN IS A JHA performed?

  • prior to commencement of work
  • if conditions change
  • before operating new equipment
  • after an adverse incident event
  • policies, procedures, or systems change.

WHAT ARE THE BENEFITS OF DOING A JHA?

  • to identify potential hazards
  • to establish who or what is at risk.
  • to predict consequences of adverse incidents
  • to select and apply risk control measures.
  • to prescribe recovery measures
  • to establish safe working environment
  • to mitigate effects of unsafe acts and conditions

JHA WORKSHEET/ FORM

THERE IS NO STANDARD FORMAT FOR A JHA, AS CONTRACTORS HAVE DEVELOPED THEIR OWN, BUT THE BASIC PRINCIPLES MUST BE FOLLOWED

A JHA example

Job Hazard What could go wrong How could I get hurt What type of injury could it be What do I do to prevent it from happening
Set up heavy relief valve Heavy Object (Valve) I could drop the heavy object The heavy object could strike me The impact could result in a broken arm or leg Ensure proper lifting equipment and slinging.

Ensure correct manual handling using correct methods.

Ensure proper supervision.

Maintain correct body position (away from line of fire)

Engage clamps High pressure (clamps) Movement of unsecured valve when pressurised  Clamps could trap my hands Impact injury Ensure clamps secure
Check and adjust lift pressure using pressurised air N2 Pressurised hose Pressure can be released in uncontrolled way resulting in hose whiplash Struck by hose coupling in the head Serious head injury Depressurise system

 

Job Hazard What could go wrong How could I get hurt What type of injury could it be What do I do to prevent it from happening
Fit plug & hose complete bubble test High pressure Seal could fail resulting in uncontrolled pressure release Contact by high pressure air injection Serious hand injury Depressurise system before test.

Check seal

Remove plug, hose & exhaust valve High pressure Rapid discharge of N2 Contact by high pressure air injection Serious hand or eye injury Release pressure slowly,

wear eye and hand protection

Release clamps Heavy object (Valve) Heavy object could fall over being unsecured The heavy object could strike me The impact could result in a broken arm or leg Attach lifting equipment correctly
Remove heavy valve from test bench Heavy object (Valve) I could drop the heavy object The heavy object could strike me The impact could result in a broken arm or leg Ensure proper lifting equipment and slinging.

Ensure correct manual handling using correct methods.

Ensure proper supervision.

Maintain correct body position (away from line of fire)

 

Blank JHA workshe

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