H2S HYDROGEN SULFIDE - DANGEROUS LETHAL GAS

Hydrogen Sulphide at the Work Site Hydrogen sulphide (H2S) occurs naturally in the earth in crude petroleum, natural gas reservoirs, volcanic gases and hot springs. Hydrogen sulphide is also produced from Hydrogen sulphide (H2S) occurs naturally in the earth in crude petroleum, natural gas reservoirs, volcanic gases and hot springs. Hydrogen sulphide is also produced from the breakdown of human and animal wastes by bacteria, industrial activities such as food processing, coke ovens, kraft paper mills, rayon textile manufacturing, wastewater treatment facilities, sulphur production, tar and asphalt manufacturing plants, tanneries, and refineries. In Alberta, Canada workers are exposed to hydrogen sulphide most often during drilling and production of natural gas, crude oil and petroleum products. Hydrogen sulphide can accumulate in sewers, sewage treatment plants or hide storage pits in the tanning industry. Well drillers, tunnel workers and miners may be exposed when underground pockets of hydrogen sulphide are encountered. Hydrogen sulphide is also a raw material used to manufacture inorganic sulphides, sulphuric acid and thiols (also known as mercaptans). In Alberta, workers are exposed to hydrogen sulphide most often during drilling and production of natural gas, crude oil and petroleum products. Hydrogen sulphide can accumulate in sewers, sewage treatment plants or hide storage pits in the tanning industry. Well drillers, tunnel workers and miners may be exposed when underground pockets of hydrogen sulphide are encountered. Hydrogen sulphide is also a raw material used to manufacture inorganic sulphides, sulphuric acid and thiols (also known as mercaptans).

Hydrogen sulphide is a colourless and poisonous flammable gas with
a strong smell of rotten eggs. It is also known as sewer gas and stink
damp. It can be detected by smell at concentrations ranging from
0.01-0.3 parts per million (ppm). However, relying solely on its
odour is not a good idea because at concentrations above 100 ppm
it deadens a person’s sense of smell within a few minutes. The
pure gas is heavier than air and can collect in low areas such as
sewers, pits, tunnels and gullies.
Hydrogen sulphide can react with rust or corrosion deposits on
equipment to form iron sulphide. This reaction occurs in an oxygen
free atmosphere where hydrogen sulphide gas is present or where the
concentration of hydrogen sulphide is greater than that of oxygen.
This happens most often in closed vessels, tanks or pipelines. Iron
sulphide is a pyrophoric material, which means that it can ignite
spontaneously when it is exposed to air.

Personal Protective Equipment:
If it is not practicable or feasible to use engineering or administrative controls to reduce the potential for exposure to hydrogen sulphide, or if these measures are not sufficient, the employer must provide workers with appropriate personal protective equipment. Respiratory
protective equipment is used to protect workers from inhaling airborne contaminants. There are many types of respirators available and it is important to select the correct level of respiratory protection depending on the type of work being done and the airborne
concentrations that may be encountered.

Since hydrogen sulphide is irritating to the eyes, air-tight goggles or full-face respirator masks should be worn. A full-facepiece positive pressure supplied air respirator is needed for work areas where hydrogen sulphide concentrations exceed the OEL.

The National Institute for Occupational Safety and Health (NIOSH) specifies an IDLH (immediately dangerous to life or health) concentration for hydrogen sulphide of 100 ppm. NIOSH allows the use of air purifying respirators for hydrogen sulphide only for escape purposes at concentrations below the IDLH concentration. Above the IDLH concentrations, or for emergency or planned entry into unknown concentrations, a full-facepiece positive pressure supplied air respirator must be used. Whatever the type of respirator used, the worker must be clean-shaven where it seals to the skin of the face and
must be fit-tested for the type of equipment being used. Except in the case of our HFZY30 or HFZY60 EEBD Self Rescue Respirator which seals the neck 100% against any possible leakage, thus whether one has a beard or long hair our EEBD has a large enough hood cavity to accommodate those with beards or longer hair. Our EEBD is a closed system like an SCBA and Supplies either 30 or 60 Minutes of Breathable Air using a Chemical Process KO2 ( Potrassium Superoxide ) which when combines with CO2 being exhaled by an individual dreates breathable Air ( 21% Oxygen & 78% Nitrogen ). This is the same technology used by All Commercial Aircraft on their PBE’s ( personal Breathing Equipment ) which are found next to the Fire Extinguishers on board all Commercial Aircraft World Wide.
With our EEBD there is No Fit Testing / No Maintenance / One Size Fits All.
Find the demonstration on YouTube at

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We are an international manufacturer of Affordable Fire Rescue & Safety Equipment with offices located in St. Louis, Missouri USA and Guangzhou, China specializing in Fire Rescue & Safety Equipment, such as; Fire Escape Smoke Hoods, Fire Blankets, Gas Masks, CHEM-BIO, Gas Fire Escape Smoke Hoods, CBRN, SCBA's, Fire Escape Ropes, Escape Ladders, Fireman's Suits.

Providing solutions for Governments, Military, Fire, First Responders, Rescue Authorities and PPE Personal Protective Equipment for Individuals WORLD WIDE.

We supply the NBA in USA / The US Air Force / Australian Air Force / The Philippine Navy / The CIA ( Central Intelligence Agency ) Exxon-Mobile / Shell Oil / NASA / The United Nations / Nestle / FEDEX / Dow Chemical / Samsung Electronics and 1000's of others World Wide.

All units have a Glow in the Dark Adjustable side Strap for Easy Identification by Rescue Authorities
All units come with a 5 Year Shelf Life
and Free One Time Replacement Warranty ( conditions apply )

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