iii |
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| SAFETY |
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| iii | |
| WELDING and CUTTING |
| CYLINDER may explode | |||||||||
| SPARKS can |
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| if damaged. | gas | cylinders | ||||
| cause fire or explosion. |
| 7.a. Use | only | compressed | |||||||
| 6.a. Remove fire hazards from the welding area. |
| containing the correct shielding gas for the | |||||||||
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| If this is not possible, cover them to prevent |
| process used and properly operating | ||||||||
| Remember | the welding sparks from starting a fire. |
| regulators designed for the gas and | ||||||||
| that | welding | sparks | and | hot |
| pressure used. All hoses, fittings, etc. should be suitable for | |||||
| materials from welding can easily go through small cracks |
| the application and maintained in good condition. |
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| and openings to adjacent areas. Avoid welding near |
| securely | |||||||||
| hydraulic lines. Have a fire extinguisher readily available. | 7.b. Always keep cylinders in | an upright | position | ||||||||
6.b. Where compressed gases are to be used at the job site, |
| chained to an undercarriage or fixed support. |
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| special precautions should be used to prevent hazardous | 7.c. Cylinders should be located: |
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| situations. Refer to “Safety in Welding and Cutting” (ANSI |
| • Away from areas where they may be struck or subjected to | |||||||||
| Standard Z49.1) and the operating information for the |
| physical damage. |
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| equipment being used. |
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| • A safe distance from arc welding or cutting operations and | |||||
6.c. When not welding, make certain no part of the electrode |
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| any other source of heat, sparks, or flame. |
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| circuit is touching the work or ground. Accidental contact can |
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| cause overheating and create a fire hazard. |
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| 7.d. Never allow the electrode, | electrode holder or any other | |||||||
6.d. Do not heat, cut or weld tanks, drums or containers until the |
| electrically “hot” parts to touch a cylinder. |
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| proper steps have been taken to insure that such procedures | 7.e. Keep your head and face away from the cylinder valve outlet | ||||||||||
| will not cause flammable or toxic vapors from substances |
| when opening the cylinder valve. |
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| inside. They can cause an explosion even though they have | 7.f. |
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| been “cleaned”. For information, purchase “Recommended | Valve protection caps should always be in place and hand | ||||||||||
| Safe Practices for the Preparation for Welding and Cutting of |
| tight except when the cylinder is in use or connected for | |||||||||
| Containers and Piping That Have Held Hazardous |
| use. |
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| Substances”, AWS F4.1 from the American Welding Society |
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| compressed gas | |||||||
| (see address above). |
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| 7.g. Read and follow the instructions on | ||||||
6.e. Vent hollow castings or containers before heating, cutting or |
| cylinders, associated equipment, and CGA publication | ||||||||||
| “Precautions for Safe Handling of Compressed Gases in | |||||||||||
6.f. | welding. They may explode. |
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| Cylinders,” available from the Compressed Gas Association | ||||||
Sparks and spatter are thrown from the welding arc. Wear oil |
| 1235 Jefferson Davis Highway, Arlington, VA 22202. | ||||||||||
| ear plugs when welding out of position or in confined places. |
| FOR ELECTRICALLY | |||||||||
| free protective garments such as leather gloves, heavy shirt, |
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| cuffless trousers, high shoes and a cap over your hair. Wear |
| powered equipment. | |||||||||
| Always wear safety glasses with side shields when in a |
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| welding area. |
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| 8.a. Turn off input power using the disconnect | ||||
6.g. Connect the work cable to the work as close to the welding |
| switch at the fuse box before working on | ||||||||||
| area as practical. Work cables connected to the building |
| the equipment. |
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| framework or other locations away from the welding area | 8.b. Install equipment in | accordance with the U.S. | National | ||||||||
| increase the possibility of the welding current passing | |||||||||||
| through lifting chains, crane cables or other alternate circuits. |
| Electrical Code, all local codes and the manufacturerʼs | |||||||||
| This can create fire hazards or overheat lifting chains or |
| recommendations. |
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| cables until they fail. |
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| 8.c. Ground the equipment in accordance with the U.S. National | ||||||
6.h. Also see item 1.c. |
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| Electrical Code and the manufacturerʼs recommendations. | ||||||
6.I. | Read and follow NFPA 51B “ Standard for Fire Prevention |
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| During Welding, Cutting and Other Hot Work”, available from |
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| NFPA, 1 Batterymarch Park, PO box 9101, Quincy, Ma |
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6.j. |
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Do not use a welding power source for pipe thawing. |
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Refer to http://www.lincolnelectric.com/safety for additional safety information.
Jan ʻ09