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Return to Master TOC
Return to Master TOC
Return to Master TOC
iii |
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| SAFETY | iii | |
| 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 | |||||
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| 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 |
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| hydraulic lines. Have a | fire extinguisher readily available. | 7.b. Always keep cylinders in an upright position securely | |||||
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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6.c. When not welding, make certain no part of the electrode | • A safe distance from arc welding or cutting operations and | |||||||
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 |
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| been “cleaned”. For information, purchase “Recommended | 7.f. 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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| (see address above). |
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| 7.g. Read and follow the instructions on compressed gas | ||
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 | ||||||||
| welding. They may explode. |
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| Cylinders,” available from the Compressed Gas Association | |||
6.f. | Sparks and spatter are thrown from the welding arc. Wear oil | 1235 Jefferson Davis Highway, Arlington, VA 22202. | ||||||
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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 | |||||||
| ear plugs when welding out of position or in confined places. | |||||||
| powered equipment. | |||||||
| Always wear safety glasses with side shields when in a | |||||||
| 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 |
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| increase the possibility of the welding current passing | 8.b. Install equipment in accordance with the U.S. National | ||||||
| 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 | ||
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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 |
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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. | Do not use a welding power source for pipe thawing. |
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Jan ‘07
