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[MUSIC PLAYING] Air is our most vital, natural, and personal resource. Both SOLAS and STCW regulations require proper training in the use of personal protective equipment, or PPE, designed to ensure a safe air supply when working on board. In this program, we will learn what constitutes an adequate and safe air supply, which situations create the highest risk for inadequate air supply and physical harm, including enclosed spaces and airborne contaminants, and the risk to health they pose, the different types of respiratory PPE and when to use them, and the importance of regular equipment inspection, along with an annual fit test. Our atmosphere is made up of nitrogen, oxygen, and other gases. We need at least 21% oxygen in our air supply at all times. When the percentage of oxygen drops below 19 and 1/2%, the environment is considered to be oxygen-deficient. Low levels of oxygen can cause dizziness, drowsiness, and a lack of coordination. If levels fall even lower, the risk of serious injury or death by asphyxiation increases. Entering into enclosed spaces constitutes a high level of risk. You could encounter an oxygen-deficient atmosphere, a concentration of flammable gases, toxic vapors, or a combination of all of the above. Airborne contaminants are also a cause for concern. When present in high-enough concentrations, particulates like dust, smoke, and aerosolized paint, as well as gases and vapors from solvents or fuels can be just as hazardous as a lack of oxygen. How do we know when the air is safe? Each contaminant has a permissible exposure limit, or PEL, which is the amount you can safely be exposed to over the course of an eight-hour day. Many contaminants also have a short-term exposure limit, or STEL. This is the maximum level of exposure to a contaminant over 15 minutes. If a contaminant in the environment you are working in exceeds the STEL or the PEL, respiratory protection of some form is required to continue your job safely. There are also environments that are considered to be an immediate danger to life or health, or IDLH, and require special types of respirators we'll show you later in the program. Your company's safety management system will determine what kind of protection is required when performing different tasks. Most tasks onboard ship in a contaminated environment will only require the use of an air purifying respirator. They are the most common and versatile form of protection. The three kinds of air purifying respirator cartridges are particulate, gas and vapor, and combination. Particulate cartridges are designed to capture dust, mist, and fumes. They will not protect against hazardous gases and vapors. The gas and vapor cartridges remove volatile compounds from the atmosphere, but are not effective against airborne particles. A combination cartridge will remove both airborne particles, and hazardous gases and vapors. Your company's Job Hazard Analysis process will identify which respirator you should use for a particular task, what kinds of filtration media to use, as well as the service life of the filter. Duties on board a ship that require a constant clean air source, or emergencies that require you to move through environments that are IDLH will require the use of an atmosphere-supplying respirator. There are four types to choose from, supplied air respirator, self-contained breathing apparatus, or SCBA, emergency escape breathing devices, or EEBD, and combination respirators. A supplied air respirator uses a host to deliver clean, uncontaminated air to a facemask. Also known as airline respirators, these are used when long-term work is to be performed in one area, and the atmosphere is not IDLH. SCBAs are designed for emergency situations to get in and out of an IDLH atmosphere. They only provide a clean air source for 30 to 60 minutes, and are not designed to be worn for extended periods of time. EEBD are required on most vessels. They are designed strictly as a single-use emergency respirator to allow you to safely move out of an IDLH atmosphere. These devices, which consist of a soft-sided helmet connected to a small compressed air cylinder, typically provide anywhere from 5 to 15 minutes of air, depending upon its intended purpose and applicable regulations, and should only be used to move yourself out of harm's way. The combination respirator is a hybrid of the supplied-air respirator and the SCBA. It's designed to be connected to a clean, compressed air source, like the supplied-air respirator, but also has a self-contained air supply like the SCBA, should the airline fail. In order to make sure your respirator provides you with the maximum amount of protection, you must ensure it's in proper working order. Always inspect your respirator before each use, according to the manufacturer's guidelines. Make sure it's clean and stored properly after each use. Your job hazard analysis and company's SMS will detail these procedures. If you're respirator appears to be damaged or worn, notify your supervisor. Using proper respiratory PPE with the correct fit is critical. You must undergo a fit test before you can use your respirator at work. This typically involves wearing a test respirator while a technician introduces a compound or smoke you can either taste or smell if your respirator is not sealing properly. This is known as a qualitative fit test. This does not measure the actual amount of leakage, only that you can detect the compound used in the test if you're facepiece does not fit correctly. A quantitative fit test involves the use of special equipment which will detect the actual amount of leakage into the facepiece of the respirator, and does not rely on your sense of taste or smell. You must be retested annually or when any physical changes might alter the original fit of your respirator facepiece. It's common practice to perform a seal check every time you wear your respirator. To check your respirator under positive pressure, close or block the exhalation valve and gently exhale into the facepiece. If a slight pressure builds up, the seal is working. A negative pressure check requires blocking the inlet openings by placing your palms over the cartridges and breathing in. If you feel a steady vacuum against your face, the seals are working correctly. The equipment manufacturer may recommend another procedure. Be sure to check your company's SMS for proper compliance. In this program, we learned what constitutes a safe environment for breathing and working, what kind of environments pose the greatest hazard onboard, the different kinds of respirators and which kind is best suited for different environments and atmospheres, and how to inspect a respirator to make sure it can protect you, as well as how to make sure a particular respirator fits correctly. Following your company's SMS and doing the correct Job Hazard Analysis before work commences will allow you to make sure you're reducing the risk of accidents and injuries, and with that, we can all breathe a little bit easier. [MUSIC PLAYING]

Video Details

Duration: 8 minutes and 42 seconds
Language: English
License: Dotsub - Standard License
Genre: None
Views: 7
Posted by: maritimetraining on Feb 8, 2017


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