Terms and Norms on Safety in Welding Part 2

terms and norms on safety in welding

Protective glasses, plates, and inserted into the mask, simply close the outside glass to protect them from splashes of molten metal. Shields are made of insulating metal - fiber, plywood, and the shape and size, they must fully protect the face and head welder (GOST 1361-69).

To mitigate the sharp contrast between the brightness of the arc and the low brightness of the dark walls (cab) they shall be painted in bright colors (red, blue, yellow) with the addition of zinc oxide in the paint to reduce reflection of ultraviolet rays of the arc incident on the wall.

When you work outside the cab to protect the view of others, worked as a welder and auxiliary workers shall apply, portable panels and screens.

Preventing the risk of damage splashes of molten metal and slag. Formed in arc welding splashes of molten metal have a temperature up to 1800 deg. C. at which the clothing of any tissue is destroyed. To protect against these sprays are usually used clothing (pants, jacket and gloves) from the canvas, or a special fabric. Jackets at work should not reduce a in the pants, and shoes should have a smooth top to spray molten metal does not fall into the clothing, as in this case there are severe burns.

To protect against contact with damp, cold ground and snow, and cold metal outdoor applications and indoor welders must be provided with warm bedding, mats, Spares and armrests of fire-resistant material with an elastic layer.

Prevention of poisoning harmful gases and aerosols released during welding. The high temperature of arc (6000 - 8000 ° C) inevitably leads to the fact that some of the welding wire, coatings, fluxes turns to a vapor state. These couples, getting the atmosphere of the shop, condensed and converted into an aerosol condensation on the particle dispersion is close to dymam and easily enter the respiratory system of welders. These aerosols are a major occupational risk of welders working. Amount of dust in the welder's breathing zone depends mainly on the welding process and welded materials, but to a certain extent by the type and design. The chemical composition of dust electric welding depends on the welding methods and types of basic and welding materials.

Along with the dust in arc welding are also formed and are released gaseous products - nitrogen oxides, carbon monoxide, welding electrode coated with "B" and a fluxing agents - fluoride. Radiation in connection with an accelerating voltage 20-22 kV and above.

In addition to compliance with these requirements in section 5.1, in order to prevent the risk of electric shock, do not touch the terminals of the clamping bolts and high-voltage circuit, remove the covers of electric terminals and threaded feed mechanism and semi-automatic, open the door hardware boxes and transformers and adjust them, etc.

See also:
Terms and Norms on Safety in Welding Part 1
Terms and Norms on Safety in Welding Part 2
Terms and Norms on Safety in Welding Part 3
Terms and Norms on Safety in Welding Part 4
General Characteristics of the Basic Safety Requirements
Accident Prevention