Return to Master TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
iii |
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| SAFETY |
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| WELDING and CUTTING |
| CYLINDER may explode | ||||||||
| SPARKS can |
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| if damaged. |
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| cause fire or explosion. |
| 7.a. Use | only compressed | gas | cylinders | |||||
| 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 | |||||||
| the welding sparks from starting | a | fire. |
| regulators designed for the gas and | ||||||
| Remember | 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 | 7.b. Always keep cylinders in an upright position securely | |||||||||
| hydraulic lines. Have a | fire extinguisher readily available. | |||||||||
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| chained to an undercarriage or fixed support. |
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6.b. Where compressed gases are to be used at the job site, | 7.c. Cylinders should be located: |
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| special precautions should be used to prevent hazardous |
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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 | ||||
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6.c. When not welding, make certain no part of the electrode |
| any other source of heat, sparks, or flame. |
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| circuit is touching the work or ground. Accidental contact can | 7.d. Never allow the electrode, electrode holder or any other | |||||||||
| cause overheating and create a fire hazard. |
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| electrically “hot” parts to touch a cylinder. |
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6.d. Do not heat, cut or weld tanks, drums or containers until the | 7.e. Keep your head and face away from the cylinder valve outlet | ||||||||||
| proper steps have been taken to insure that such procedures | ||||||||||
| 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. | Valve protection caps should always be in place and hand | ||||||||
| been “cleaned”. For information, purchase “Recommended | ||||||||||
| 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 | 7.g. Read and follow | the instructions on | compressed gas | |||||||
| (see address above). |
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| cylinders, associated equipment, and CGA publication | |||||
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6.e. Vent hollow castings or containers before heating, cutting or |
| “Precautions for Safe Handling of Compressed | Gases in | ||||||||
| Cylinders,” available from the Compressed Gas Association | ||||||||||
| welding. They may explode. |
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| 1235 Jefferson Davis Highway, Arlington, VA 22202. | ||||||
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6.f. | Sparks and spatter are thrown from the welding arc. Wear oil |
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| free protective garments such as leather gloves, heavy shirt, |
| FOR ELECTRICALLY | ||||||||
| cuffless trousers, high shoes and a cap over your hair. Wear |
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| ear plugs when welding out of position or in confined places. |
| powered equipment. | ||||||||
| Always wear safety glasses with side shields when in a |
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| welding area. |
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6.g. Connect the work cable to the work as close to the welding |
| 8.a. Turn off input power using the disconnect | |||||||||
| 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 manufacturer’s | ||||||||
| 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 manufacturer’s recommendations. | |||||
6.I. Read and follow NFPA 51B “ Standard for Fire Prevention During Welding, Cutting and Other Hot Work”, available from NFPA, 1 Batterymarch Park,PO box 9101, Quincy, Ma
6.j. Do not use a welding power source for pipe thawing.
Jan ‘07
