This document discusses various hazards associated with gas and arc welding. It notes that high pressure gas cylinders and regulators can present hazards. Low pressure acetylene generators also require precautions when installing, servicing, or dismantling. General precautions for gas welding include preventing explosions and fires, and protecting from heat and burns. Arc welding hazards include radiation, slag chips, fumes, inert gases, heat, and hot metal. Radiation can cause skin effects and eyeflash or photophthalmia. Welding fumes can deposit in the lungs but may not necessarily be harmful, though certain metals like stainless steel require lower exposure limits.

1. HAZARDS OF GAS WELDING (A)
HIGH PRESSURE PLANTS
M.R.RAJPUT

2. HAZARDS OF GAS WELDING (A) HIGH
PRESSURE PLANTS
CYLINDERS REGULATORS
COMPRESSED AIR COMPRESSED GAS
INERT FLAMMABLE
BLOWPIPES
CONNECTING HOSE
COLOUR CODING

3. HAZARDS IN GAS WELDING B – LOW
PRESSURE PLANTS
ACETYLINE
GENERATORS
BACK PRESSURE
VALVES
INSTALLATION
SERVICING
DISMANTLING
BLOW PIPES &
FITTINGS
FLASH BACK
EXPLOSIONS
CALCIUM CARBIDE
DANGE ROUS
WHEN WET

4. GAS WELDING: GENERAL PRECAUTIONS
PREVENT
EXPLOSIONS
FIRE PREVENTION
EXPLOSIVE RANGE 2% TO 8%
HEAT AND BURN:
PROTECTION
LIGHTING
VENTILATION AND RESPIRATORY
PROTECTION

5. HEALTH HAZARDS IN ARC WELDING
1. RADIATIONS
2. CHIPPING OF SLAG
3. FUMES
4. INERT GAS
5. HEAT
6. HOT METAL
7. IGNITION OF FLAMMABLE MATERIALS

6. SKIN EFFECTS OF RADIATIONS
CAUSE: U.V. LIGHT & HEAT RAYS FROM ARC
WELDING USING D.C. OR A.C. WITH EITHER
CARBON OR METAL ELECTRODE
REMEDY: NO PART OF THE SKIN TO BE
EXPOSED TO RADIATION

7. EYEFLASH
EYEFLASH DUE TO RADIATION ALSO KNOWN
AS:
ARC EYE
A PAINFUL CONJUNCTIVITIS ‘PHOTO
OPHTHALMIA’ CAUSED BY U.V. RAYS PRESENT
IN BRILLIANT ARC WELDING LIGHT.

8. EYEFLASH IN U.K.
IN THREE YEARS [1959.60.61] 452 CASES
INVOLVING ABSENCE FROM WORK FOR MORE
THAN THREE DAYS.
[BUT EYEFLASH MOSTLY LASTS FOR LESS THAN
THREE DAYS].

9. SYMPTOMS OF EYEFLASH
4 TO 8 HOURS AFTER EXPOSURE
1. FEELING OF ‘SAND’ IN THE EYES
2. INTENSE PAIN
3. PHOTOPHOBIA [INTOLERANCE TO LIGHT]
4. LACRIMATION
5. TERMPORARY LOSS OF VISION [OCCASIONALLY]
6. HEADACHE.
COMPLETE RECOVERY IN 24-48 HOURS.
NO CHRONIC EFFECTS

10. CHIPPING OF SLAG
EYE INJURIES DUE TO FLYING CHIPS.
FACE SHIELD IS ENOUGH BUT TOO OPAQUE TO
SEE THROUGH
HENCE
GOGGLES WITH CLEAR GLASS WINDOWS
SHOULD ALSO BE USED.

11. WELDING FUMES
IRON OXIDE FUMES PRODUCED DURING
WELDING OF IRON OR STEEL.
CHANGES ARE SEEN-X-RAY PLATES OF LUNGS
OF WELDERS.
THESE CHANGES ARE NOT SIGN OF ILL
HEALTH.

12. AMERICAN CONFERENCE OF GOVERNMENTAL
INDUSTRIAL HYGIENISTS RECOMMEND.
CONCENTRATION OF PARTICULATES SHOULD
NOT EXCEED 5mg/M3 IN BREATHING ZONE
WHEN WELDING IRON, STEEL OR ALUMINUM.
[GENERALLY THIS VALUE DOES NOT EXCEED
WITHIN THE FACE SHIELD IF THE VENTILATION
IS ADEQUATE]

13. BUT WHILE WELDING STAINLESS STEEL,
CADMIUM LEAD COATED STEEL, COPPER,
NICKEL ETC.
THE LIMIT SHOULD BE LOWER

14. WELDING OF GALVANISED STEEL MAY LEAD
THE WORKERS TO METAL FUME FEVER.
FEELING OF CHILL WITH SHIVERING AND
SWEATING.