Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Safety Notes: Manual Metal Arc Welding

12,970 views

Published on

MEM 5.12C PERFORM ROUTINE MANUAL METAL ARC WELDING

Published in: Business, Technology
  • I’m sure you will provide the more awesome blogs like these blogs that I’ve enjoyed a lot.
    http://klkwelding.com/
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • u did it
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • I just published on slideshare
    safety at work awards > welding edition
    HAVEALOOK
    http://www.slideshare.net/miketopwelds/safety-at-work-awards-the-winner-is-welding-edition
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here

Safety Notes: Manual Metal Arc Welding

  1. 1. SAFETY THEORY NOTES A POWER POINT PRESENTATION by John Sharples
  2. 2. <ul><li>MMAW HAZARDS </li></ul><ul><li>BURNS </li></ul><ul><li>ELECTRICITY </li></ul><ul><li>FUMES </li></ul><ul><li>ARC RADIATION </li></ul><ul><li>MMAW SAFETY PRECAUTIONS </li></ul><ul><li>PERSONAL PROTECTIVE EQUIPMENT </li></ul><ul><li>PROTECTIVE CLOTHING </li></ul><ul><li>WELDING SCREENS </li></ul><ul><li>ELECTRICAL SAFETY </li></ul><ul><li>VENTILATION </li></ul>
  3. 3. <ul><li>BURNS </li></ul><ul><li>may occur when:- </li></ul><ul><li>Touching hot metal </li></ul><ul><li>Spatter, sparks or hot slag </li></ul><ul><li>Heat from the arc </li></ul><ul><li>ELECTRIC SHOCK </li></ul><ul><li>May occur:- </li></ul><ul><li>Welding in wet conditions </li></ul><ul><li>Contact with non-insulated welding circuit </li></ul><ul><li>Damaged welding plant or equipment </li></ul><ul><li>Body parts completing the welding circuit </li></ul>
  4. 4. <ul><li>WELDING FUMES </li></ul><ul><li>Fumes are given off from:- </li></ul><ul><li>The electrode flux coatings melting in the arc </li></ul><ul><li>Oxides or the surface coating on the metal being welded </li></ul><ul><li>ARC RADIATION </li></ul><ul><li>The welding arc emits:- </li></ul><ul><li>Ultra-violet rays </li></ul><ul><li>Infra-red rays </li></ul><ul><li>These rays can cause serious burns to your skin and eyes </li></ul>
  5. 5. <ul><li>Protective clothing and equipment </li></ul><ul><li>Adjustable helmet </li></ul><ul><li>And approve safety glasses </li></ul><ul><li>Fire proof overalls </li></ul><ul><li>or trousers/shirt </li></ul><ul><li>Leather gloves </li></ul><ul><li>No cuffs on the legs </li></ul><ul><li>Steel capped safety boots </li></ul>
  6. 6. <ul><li>Shade Recommended amps </li></ul><ul><li>10 up to 150 amps </li></ul><ul><li>11 150 – 250 amps </li></ul><ul><li>12 250 – 300 amps </li></ul><ul><li>13 300 – 400 amps </li></ul><ul><li>14 over 400 amps </li></ul>
  7. 7. <ul><li>In any workshops welding screen must be erected to protect others </li></ul><ul><li>Must be made from non-reflective material </li></ul><ul><li>Can be portable type </li></ul>
  8. 8. <ul><li>Before turning the welding machine on :- </li></ul><ul><li>Check all welding cables are in good condition </li></ul><ul><li>Make sure all electrical connections are tight and in good repair </li></ul><ul><li>Make sure you wear all your PPE </li></ul><ul><li>Never hold the electrode or holder under your arm </li></ul><ul><li>Never use welding equipment in confined spaces or hazardous areas without supervision by a competent person </li></ul><ul><li>Never place your body in or across the welding circuit </li></ul><ul><li>Know where to turn the electrical power off on welding equipment </li></ul>
  9. 9. <ul><li>Methods of ensuring that the air is safe to breath are:- </li></ul><ul><li>Natural ventilation </li></ul><ul><li>Forced fume extraction </li></ul><ul><li>Respirators </li></ul><ul><li>Methods of limiting exposure to fumes include:- </li></ul><ul><li>Keep your head out of the fume rising from the arc </li></ul><ul><li>Avoid breathing fumes from metal such as stainless steels </li></ul><ul><li>Avoid breathing fumes from surface coating such as galvanised steel </li></ul>

×