06/14/1999 Council Packet - Laserfiche WebLink

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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Filter Lenses for Protection Against Radiant Energy (Medium)** 300 — 400 9 Minimum (Heavy) ** 400 — 800 10 Torch brazing Protective Operation 3 Torch soldering mm Shade 2 Carbon arc welding Under 1/8 1/8 to 1 Over 1 Under 3.2 3.2 to 12.7 Over 12.7 14 Filter Lenses for Protection Against Radiant Energy *As a rule of thumb, start with a shade that is too dark to see the weld zone. Then go to a lighter shade, which gives sufficient view of the weld zone without going below the minimum. In oxyfuel gas welding or cutting where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs the yellow or sodium in the visible light of the (spectrum) operation. * *These values apply where the actual arc is clearly seen. Experience has shown that lighter filters may be used when the arc is hidden by the workpiece. 3. Respiratory Protection On jobs involving exposure to harmful fumes, gases, mists, or respiratory protection shall by used. a. Supervisors shall thoroughly instruct employees whose work assignments involve the use of respiratory protection about the potential hazards they are exposed to and how to use the proper respiratory equipment. b. Suitable breathing apparatus shall be conspicuously placed near work environments that present atmospheric hazards. c. Respirators shall be inspected periodically and after emergency use. d. A program shall be maintained for cleaning and disinfecting respirators. e. Use and maintenance of fresh air masks: i. One other employee shall be notified to stand by in case of emergency before an employee enters a potentially hazardous area. ii. Employee shall be certain mask is functioning properly and that face seal is secure. iii. Masks shall not be worn when conditions prevent a good face seal, such as sideburns or beard growth, etc. iv. Employees shall not wear contact lenses with masks in contaminated atmospheres. 4. Head Protection 27 Plate Plate Minimum Thickness Thickness Protective Operation Inches mm Shade Gas Welding: Light Medium Heavy Under 1/8 1/8 to 1 Over 1 Under 3.2 3.2 to 12.7 Over 12.7 4 5 6 Oxygen cutting: Light Medium Heavy Under 1 1 to 6 Over 6 Under 25 25 to 150 Over 150 3 4 5 *As a rule of thumb, start with a shade that is too dark to see the weld zone. Then go to a lighter shade, which gives sufficient view of the weld zone without going below the minimum. In oxyfuel gas welding or cutting where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs the yellow or sodium in the visible light of the (spectrum) operation. * *These values apply where the actual arc is clearly seen. Experience has shown that lighter filters may be used when the arc is hidden by the workpiece. 3. Respiratory Protection On jobs involving exposure to harmful fumes, gases, mists, or respiratory protection shall by used. a. Supervisors shall thoroughly instruct employees whose work assignments involve the use of respiratory protection about the potential hazards they are exposed to and how to use the proper respiratory equipment. b. Suitable breathing apparatus shall be conspicuously placed near work environments that present atmospheric hazards. c. Respirators shall be inspected periodically and after emergency use. d. A program shall be maintained for cleaning and disinfecting respirators. e. Use and maintenance of fresh air masks: i. One other employee shall be notified to stand by in case of emergency before an employee enters a potentially hazardous area. ii. Employee shall be certain mask is functioning properly and that face seal is secure. iii. Masks shall not be worn when conditions prevent a good face seal, such as sideburns or beard growth, etc. iv. Employees shall not wear contact lenses with masks in contaminated atmospheres. 4. Head Protection 27