I know H2S Awareness

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					I know H2S Awareness
          H2 S :
        The Basics
                     HAZARDS on
                      Our Sites

• Physical hazards (slips, trips, falls, falling objects, pinch
  points and snags)
• Hazardous substances
• Environmental (Heat/cold, Noise)
• Machinery and tools
• Confined spaces
• H2S (Hydrogen Sulfide)
        Identification of hazards

                           Exposure Effects
• FLRA (Field Level Risk   Hydrogen sulphide (H2S) is a toxic gas and the
                           health hazard depends upon both the duration
  Assessment)              of exposure and the concentration. The gas is
                           an irritant of the lungs and at low
  Lets go to work          concentrations irritates the eyes and the
                           respiratory tract. Exposure may result in
  – Identify hazard        headache, fatigue, dizziness, staggering gait,
                           and diarrhoea, followed sometimes by
  – Assess the risks       bronchitis and bronchopneumonia
  – Control the risks
          H2S (Hydrogen sulfide)
• Colorless, toxic and flammable gas that in low quantities
  can smell like rotten eggs. In high quantities, it is
• Heavier than air and tends to accumulate in confined
• Byproduct of oil/gas impurities, volcanoes, swamps and
• Can be found at wellsites, refineries, and in many areas
  oil/gas companies operate.
• Before working in areas where this gas is known to be
  present, H2S training is usually required. Ex: H2S Alive.
• PPE for H2S can include gas detectors and SCBA (self-
  contained breathing apparatus).
        Characteristics of H2S
              (Hydrogen Sulphide)
 H2S is a highly toxic
  colourless gas, with an
  odour similar to rotten eggs.
 It is heavier than air and will
  therefore, settle in low-lying
 And it has a lower explosive
  limit (4.3%) with an upper
  explosive limit (45%), this
  is 5 times greater than the
  explosive range of petrol.
 Characteristics of H2S
 When ignited, burns with a blue flame and
 produces sulphur dioxide (SO2)… that is also
 a toxic gas.
               GAS TESTING

The following abbreviations are used:
AGT - Authorized Gas Tester.
CH4 - Methane (a flammable hydrocarbon gas).
H2S - Hydrogen Sulphide (a toxic gas).
LEL - Lower Explosive Limit.
UEL - Upper Explosive Limit.
ppm - Parts per million.
Potential Exposures to H2S
 Potential exposure to H2S exists during drilling
  operations at sour crude/sour gas locations,
  through, recycled mud, water, injection of
  steam/water to stimulate oil production and
  during blow-out conditions.

 Potential exposure to H2S exists during field
  maintenance on tanks, voids, wells, seals etc.
Potential Exposures to H2S
 Potential exposure to H2S also exists when
  tank gauging, breaking flanges and opening
  up lines at production, pipeline and refinery
 Entry into confined spaces such as vessels,
  separators, valve pits, trenches etc, can also
  be sources of H2S hazards
     H2S Exposure

Personal exposure to H2S must not
  exceed 10 parts per million (ppm)
  in any 8 hours.
Important: REMEMBER!
Personal Effect to H2S Exposure
   10 – 22 ppm
       Eye Irritation

   20 –100 ppm
       Corneal blistering (cornea of eye),
       Opacity of the eye
       Loss of sense of smell
       Coughing and Nausea.
 Personal Effect to H2S
 100 – 300 ppm
  Respiratory difficulty and Irritation,
  Pulmonary Edema.
 300 – 600 ppm
  Central and Peripheral Nervous System
  Effect, e.g. Tremors, Weakness,
  Numbness of Extremities,
  Unconsciousness and Convulsions.
Personal Effect to H2S
 600 – 1,000 ppm
  Rapid Unconsciousness resulting in
  Death if Emergency Aid is not
  promptly administered.
 1,000 ppm plus
  Cessation of Breathing
  (Instantaneous) and Death
•   Gas Detection
•   Smart Strips
•   Radiation
•   EEBD
•   APR
•   Tyvek type F
                    Gas Detection
• Gas Alert Clip
   –   O2 or H2S
   –   Weekly calibration
   –   2 year sensor life
   –   1 year shelf life
   –   0 maintenance
Gas Detection
       • Gas Alert Micro
          –   O2, Explosive, H2S, CO
          –   Quarterly Calibration
          –   Weekly “bump test”
          –   2 year sensor life
       • GAMicro Clip
          – Single Button Operation
                  Gas Detection
• Gas Alert Micro 5
   – O2, Explosive, H2S, CO,
Essential Awareness and
Recognise and respect the potential hazard
Always follow the established work
Always monitor concentrations
Always use respiratory protection as set
 down in the work procedures
Rescue in H2S Service
 If competent in its use, always wear an
  air-fed breathing apparatus set before
  attempting a rescue.

Failure to do so could result
 in you becoming a victim.
       NEVER attempt a rescue in an area that may
       contain hydrogen sulfide without using
       appropriate respiratory protection and
       without being trained to perform such a
    First Aid in H2S Service
 Remove casualty immediately to fresh air.
 If casualty is not breathing, start artificial
  respiration immediately.
 If casualty’s heart has stopped, commence
  cardio-pulmonary resuscitation (CPR).
 Keep casualty warm.
 Once casualty has been removed to fresh air and
  normal breathing has been restored, keep under
  observation until relieved by qualified medical
              Take away
• Be aware of your surroundings
• Conduct Field Level Risk Assessments.
  Identify hazards then eliminate, avoid or
  minimize them
• Get trained for the job and the jobsite
• Wear PPE

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