H₂S Gas Hazard and Safety Precaution.
What is H₂S
H₂S (hydrogen sulfide) is a colour less gas which smells like rotten egg & it is extremely flammable, toxic & corrosive in nature, Hydrogen Sulfide produced by the breakdown of organic compounds in the absence of oxygen.
H₂S is also known as hydrogen sulfide, sour gas, stink damp, rotten egg gas, sulfur hydride & devils breath.
Characteristics of H₂S gas
- H₂S is Extremely Flammable.
- H₂S is Toxic (Poisonous).
- H₂S is corrosive.
- H₂S gas is heavier than air. (19% heavier than air)
- H₂S is colour less gas.
- H₂S smells like rotten egg.
- H₂S above ppm kills the power of smells.
- H₂S gas burn in blue flame.
- H₂S produce Sulphur Dioxide on burning which is also a toxic gas.
- H₂S is soluble in water & oil.
Flammability range of H₂S gas
- Lower explosive limit (LEL) of H₂S - 4.3%.
- Upper explosive limit (UEL) of H₂S - 46%.
Permissable Exposure Limit (PEL) of H₂S
- Time Weighted Average (TWA) of H₂S - 10ppm for 8 hours.
- Short Term Exposure Limit (STEL) of H₂S -
- 15ppm ( for 15 minutes)
- IDLH of H₂S - 100ppm (Immediately dangerous to life and health).
Hazards & consequences of of H₂S
H₂S can cause:-
- Breathing problems.
- Headache.
- Dizziness.
- Even death.
- H₂S effects Olfactory Nerves (loss of smell & test).
- H₂S can damage Lungs, eyes & brain.
Safety precautions for H₂S gas
- Gas test perior starting the job.
- Awareness among employees.
- Carry personal H₂S monitor.
- Work in group.
- Aware of wind direction by windsock.
- Emergency Evacuation dill must be conducted.
- Availability of emergency response team.
Personal Protective Equipment (PPE'S)
PPE's for H₂S.
- Escape Mask (for emergency escape).
- Air line breathing apparatus for long period of Job.
- SCBA - Self contained breathing apparatus for short term job & for emergency rescue team.
Emergency response plan
In case of H₂S leak follow following steps for emergency evacuation:-
- Stay cool & calm.
- Stop the Job.
- Stop the equipment.
- Use escape mask.
- See windsock for wind direction.
- Move in cross wind direction.
- Reach at safe assembly area.
FAQ's
First aid for H2S poisoning?
Check the person is breathing - Check the pulse - Apply the breathing apparatus until doctor reach.
Why H2S is so dangerous?
Because H2S is highly flammable and toxic at very low concentration, at 1 PPM it kill the sense of smell.
Use of H2S Gas?
H2S gas use to produce sulfuric acid & sulfur for pesticides, leather & pharmaceutical.
How long can I survive after H2S exposure?
It depends on concentration of H2S, you can die within a minute if H2S is above 100ppm.
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1 Comments
Je vous remercie infiniment pour les cours, les documents et les certifications, bonne réussite et bonne continuation à "Safety MANAGEMENT" et à vous. Bonne chance!/GL.
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