What is the OSHA standard for H2S?
Exposures must not exceed 20 parts per million (ppm) (ceiling) with the following exception: if no other measurable exposure occurs during the 8-hour work shift, exposures may exceed 20 ppm, but not more than 50 ppm (peak), for a single time period up to 10 minutes.
What are the types of H2S?
Hydrogen sulfide is a colorless, flammable, extremely hazardous gas with a “rot- ten egg” smell. Some common names for the gas include sewer gas, stink damp, swamp gas and manure gas.
What are some properties of H2S?
Flammable, poisonous, colorless gas with a strong odor of rotten eggs. Colorless gas with a strong odor of rotten eggs. [Note: Sense of smell becomes rapidly fatigued & can NOT be relied upon to warn of the continuous presence of H2S. hipped as a liquefied compressed gas.]
What is the use of H2S?
Hydrogen sulfide is used primarily to produce sulfuric acid and sulfur. It is also used to create a variety of inorganic sulfides used to create pesticides, leather, dyes, and pharmaceuticals. Hydrogen sulfide is used to produce heavy water for nuclear power plants (like CANDU reactors specifically).
What is PEL of H2S?
► Hydrogen Sulfide is a FLAMMABLE GAS and a. DANGEROUS FIRE HAZARD. Workplace Exposure Limits. OSHA: The legal airborne permissible exposure limit (PEL) is 20 ppm not to be exceeded at any time, and 50 ppm as a maximum peak, not to be exceeded during any 10-minute work period.
What are the hazards of H2S?
Hydrogen sulfide (H₂S) is a colorless gas with a strong odor of rotten eggs. Exposure to hydrogen sulfide may cause irritation to the eyes and respiratory system. It can also cause apnea, coma, convulsions; dizziness, headache, weakness, irritability, insomnia; stomach upset, and if liquid: frostbite.
What is the exposure limit for H2S?
OSHA: The legal airborne permissible exposure limit (PEL) is 20 ppm not to be exceeded at any time, and 50 ppm as a maximum peak, not to be exceeded during any 10-minute work period. NIOSH: The recommended airborne exposure limit (REL) is 10 ppm, which should not be exceeded during any 10-minute work period.
What is ppm of H2S?
General Industry Ceiling Limit: 20 ppm. General Industry Peak Limit: 50 ppm. (up to 10 minutes if no other exposure during shift) Construction 8-hour Limit: 10 ppm.
What is the safe level of H2S?
The Occupational Safety and Health Administration (OSHA) defines Permissible Exposure Limits (PELs) to H2S gas as follows: General Industry Ceiling Limit: 20 ppm. General Industry Peak Limit: 50 ppm (up to 10 minutes if no other exposure during shift) Construction 8-hour Limit: 10 ppm.
How is H2S measured?
The colorimetric-ratiometric tape method of analysis is the only proven method to measure hydrogen sulfide in crude oil headspace without any interference from components similar to H2S. The method is described in several ASTM methods including ASTM 4084-82.
What is the principle of H2S analyzer?
The Pulsed Fluorescence Analyzer operates on the principle that H2S can be converted to SO2. SO2 molecules absorb ultraviolet (UV) light and become excited at one wavelength, then decay to a lower energy state emitting UV light at a different wavelength.
What is H2S analyzer?
Model PT605 H2S Analyzer is designed for continuous measurement of hydrogen sulfide gas in process gas streams. The unit is available in various low and high range of measurements. The unit is cost effective yet highly accurate and reliable. The system uses latest in microprocessor and signal conditioning technology.
How can we detect H2S?
For detection of hydrogen sulfide (or hydrogen sulphide), a portable or fixed gas detector can be used, with most H2S detectors being suitable for work in hazardous areas. CAS No. At room temperature, hydrogen sulfide is a colourless, flammable gas with a pungent “rotten egg” odour.
In which area is there an increased risk of exposure to H2S?
Inhaled hydrogen sulfide initially affects the nose and throat. Low concentrations (50 ppm) can rapidly produce irritation of the nose, throat, and lower respiratory tract.
What is H2S zone?
H2S Zone Classification The H2S Zone Classification study identifies the low, medium and high-risk areas in the facility and specify access controls and precautions to be adopted when entering classified areas.
Who is the instructor of H2S safety training?
H2S SAFETY TRAINING (HYDROGEN SULFIDE) INSTRUCTOR: Rolando S. Bulatao Jr. H2S SAFETY TRAINING What is Hydrogen Sulfide (H2S)? Where do you find H2S? – PowerPoint PPT presentation
How dangerous is H2S exposure to humans?
It also describes the types of hazardous effects that H2S exposure can inflict on the human body, and discusses the appropriate actions to take when someone has been exposed to hydrogen sulfide. Hydrogen sulfide is an extremely toxic, colorless, flammable gas with a characteristic rotten egg smell when present in small concentrations.
What are the different types of H2S alarms?
H2S SAFETY TRAININGH2S SAFETY TRAINING Most alarms will consist of anMost alarms will consist of an amberamber strobe light, astrobe light, a blueblue strobe light, astrobe light, a redred strobe light, and a dual tone audiblestrobe light, and a dual tone audible alarm.alarm.
What gas is produced when h22s is burned?
Burning HBurning H22S produces another toxic gas called SOS produces another toxic gas called SO22 (Sulphur Dioxide) (Sulphur Dioxide) Sulphur Dioxide (SOSulphur Dioxide (SO22)) is ais a colorless or transparent gascolorless or transparent gas andand is non-flammable. It is also heavier than air with a specificis non-flammable.