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Transcript of H2S
How does H2S harm us ?
What is the PPE should we use?
How can we detect H2S ?
What should we do in H2S release ? H2S …What Is It? H2S is produced naturally when organic matter decomposes in the absence of oxygen. Example of a H2S molecule Where do we find H2S? ( Risk areas for H2S) Oil and gas operations Mining facilities Sewage Landfills Waste water treatment plants Toxicity H2S Effects at Varies Concentrations Exposure Limits P.E.L. = Permissible Exposure Limit
Defined as the maximum air concentration you can be exposed to in an 8 hour period, 40 Hour Week, without respiratory protection.
Established by O.S.H.A. H2S detection There are many ways to be alerted by the presence of H2S: Sense of smell (nose)
Lead Acetate, Ampoules or Coated Strips
Colorimetric Tubes (NIOSH certified)
Personal or Fixed Monitors
Wet Chemistry (Tutweiler method)
Gas Chromatography You cannot rely on your sense of smell to tell how much H2S is present WARNING!!! Two types of monitoring: 1.Personal Monitors 2. Fixed Monitors •Small and Convenient
•Easy to Use
•Monthly Bump Checks •Wear on your hip.
•sound at 10 ppm. • Found on Rigs, Well Sites, Refineries, Storage Facilities, etc…
•Sound at the P.E.L.= 10 p.p.m. ALARMS Most alarms will consist of an amber strobe light, a blue strobe light, a red strobe light, and a dual tone audible alarm. Types of Alarm: Low Level Alarm:10ppm
High Level Alarm:15ppm and above Hydrogen Sulfide Condition Levels: Condition Green “POSSIBLE DANGER” less than 10 ppm.
no alarms. Condition Yellow “MODERATE DANGER” 10 ppm - 15 ppm
the well is under control.
Amber flashing light is activated. Condition Red “EXTREME DANGER” > 15 ppm
loss of well control occurs.
Amber flashing light and audible
alarms are activated. Protection against H2S hazards Two Common Types of Breathing Apparatus
(Respiratory Protection) 1.Self Contained Breathing Apparatus (SCBA) •provides air from a cylinder worn on the back.
•supply air for 30 minutes
•heavy physical work. 2.Supplied Air Breathing Apparatus •is connected by a hose line
•is lighter to wear
•restricts the user’s movements
•return by the same route
•An escape bottle must be worn Rescue H2S kills many of us when we don’t think, or aren’t trained, and we attempt a rescue.
Remember, always protect yourself first, then assist any victims in an H2S emergency.
You must be rescue trained.
You must use the correct Personal Protective Equipment.
If you do rescue of victim of H2S, be careful when providing rescue breathing. Emergency Response and Rescue Procedures If the gas is present, the space/area must be ventilated continually to remove the gas.
If the gas cannot be removed, the person
must use respiratory protection and any rescue
and communication equipment before entering H2S General
Properties Water and Oil Soluble Flammable &
Explosive Rotten Eggs smell Corrosive(H2S corrodes carbon steel readily) Invisible(colorless) Heavier than Air Always pay attention to
the flags or wind socks.