Safety precautions in gas welding
Consideration of safety precautions in gas welding in industries or fabrication shops. It is important to know and imply the safety regulations. Since gas welding process uses gases like acetylene and oxygen to produce flames. Acetylene is flammable and hazardous. It has the ability to ignite and condense. Whilst, oxygen helps other substance to burn faster. It does not catch fire, but can explode if expose to fire.
Now you see source of gas welding flames is just as time bomb, when they mix. Serious care must be taken in avoid acetylene flame and oxygen of meet.
This article contains all area of safety precaution in gas welding which include:
- Personal protective equipment
- Storage and handling
- Environmental safety
- Work and equipment safety. In addition,
- General safety tips
Personal protective equipment
Eye goggle or safety glasses should use to protect eye from infrared radiation. Protecting clothing such as, flame proof apron, gloves, cap or helmet, and booth should be wear before welding.
Apron should should be well fitted to avoid fraying. Shirt should be long sleeves and trousers should be long enough to cover top of booth. cloth should be free from oil or grease. All these clothing should be in good condition before operators or students use them.
Storage and Handling Safety
Cylinders should not be expose to heat, and should be securely chain to prevent from falling. they should be kept away from flammable and combustible materials, same as in upright (vertical) position. they should be store in a well ventilated area, Acetylene and oxygen cylinders should be store separately. It should not be drag, but rolling on a slow movement on bottom edges.
Valves on cylinders should be close before moving. Regulators and protective caps should be kept in place. Keep hands off grease or oil when opening or close valves and regulators
Industries or shops where gas welding is use should have proper ventilation, lightening, walkways, store, escape route, safety poster etc. Floor should be kept clean, free from water grease and oil. Fire extinguisher should be easily accessible and welded jobs should be properly store.
Set of gas welding equipment should be at least 10,000 cubic feet away from each other. Ceiling height should be at least 16feet from ground. Finally, all equipment should be inspect before welding.
Operation and equipment safety
Flame arrestors must be fitted in acetylene and oxygen cylinder lines. One of it should fitted beside the low pressure regulator and other near the touch. Higher pressure should release on oxygen than acetylene to avoid acetylene flame from going back. However, acetylene should not be use when welding at a pressure exceeding 1bar of atmosphere gauge to avoid explosion.
Whenever backfire occurs, oxygen valve should be close first and acetylene should follows immediately. It should be rectify before operations continue. In case of flashback (explosion in gas hose), first thing to do is to set the both cylinder valve apart. Whenever flashback occurs, all hoses should be replace with new ones.
Fittings should be use to securely tight all hose connections. Finally, there should working time for acetylene cylinder. Reason because, using acetylene at high temperature can cause exposure. Time of use will be determined by the size of cylinder.
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And that is it for this article, safety precaution in gas welding. Hope you gain a lot. Thanks for reading. Kindly share!