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2. Welding helmet - Wikipedia

   en.wikipedia.org/wiki/Welding_helmet

   A welding helmet in use. A welding helmet is a piece of personal protective equipment used by welders to protect the user from concentrated light and flying particles. Different welding processes need stronger lens shades with auto-darkening filters, while goggles suffice for others.

3. Personal protective equipment - Wikipedia

   en.wikipedia.org/wiki/Personal_protective_equipment

   There are two main types of respirators. One type of respirator functions by filtering out chemicals and gases, or airborne particles, from the air breathed by the user. [5] The filtration may be either passive or active (powered). Gas masks and particulate respirators (like N95 masks) [6] are examples of this type of respirator. A second type ...

4. Respirator assigned protection factors - Wikipedia

   en.wikipedia.org/wiki/Respirator_Assigned...

   1.1. The air purifuing respirators (negative pressure; and powered PAPR) - with high efficiency filters (>99.95%); 1.2. The supplied air respirators - with positive pressure demand air supply to the masks; and with continuous flow air supply to the helmets or hoods. 2 The APF for South Korea and RF are not mandatory, but recommended values only.

5. List of welding processes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_processes

   This is a list of welding processes, separated into their respective categories. The associated N reference numbers (second column) are specified in ISO 4063 (in the European Union published as EN ISO 4063 ). [ 1 ]

6. MSA Safety - Wikipedia

   en.wikipedia.org/wiki/MSA_Safety

   Construction worker wearing an MSA Skullgard hard hat at Douglas Dam, Tennessee (), 1942. Mine Safety Appliances, or MSA Safety Incorporated, is an American manufacturer and supplier of safety equipment designed for use in a variety of hazardous conditions in industries such as construction, the military, fire service, and chemical, oil, and gas production.

7. Racal suit - Wikipedia

   en.wikipedia.org/wiki/Racal_suit

   The hood is a separate component from the protective suit. The Racal hood is a type of PAPR consisting of a transparent hood connected to a respirator, which is powered by a rechargeable battery. The respirator has three HEPA filters that are certified to remove 99.7% of particles of 0.03 to 3.0 microns in diameter.