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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
Soviet soldiers in SSh-40 helmets at 1945 Victory Parade. The SSh-40 was the most commonly seen in-service helmet used by the Soviet Union during World War II. [citation needed] The only external difference between the SSh-39 and the SSh-40 was the six rivets near the bottom of the helmet, as opposed to the three near the top of the SSh-39 shell.
The flame size is determined by the welding tip size. The proper tip size is determined by the metal thickness and the joint design. Welding gas pressures using oxy-acetylene are set in accordance with the manufacturer's recommendations. The welder will modify the speed of welding travel to maintain a uniform bead width.
Full face welding helmets with dark face plates are worn to prevent this exposure, and in recent years, new helmet models have been produced that feature a faceplate that self-darkens upon exposure to high amounts of UV light. To protect bystanders, opaque welding curtains often surround the welding area.
As a result, the mass of the helmet is increased to 2 kg. This helmet is designed for the personnel of the Russian armed forces. The helmet protects the head in class 1 (9×18mm Makarov pistol and revolver bullets), as well as from fragments of steel of spherical mass of 1.1 g (6.3 mm diameter of fragment) up to 400 m/s. [10]
Conventional welding helmets contain dark face plates to prevent this exposure. Newer helmet designs feature a liquid crystal-type face plate that self-darkens upon exposure to the arc. Transparent welding curtains, made of a polyvinyl chloride plastic film, are often used to shield nearby workers and bystanders from exposure to the arc. [40]