Lincoln Electric IM958 manual For Electrically, Iii

iii	SAFETY		iii
	WELDING and CUTTING		CYLINDER may explode
			if damaged.
	SPARKS can
	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
	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.
	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.
6.b. Where compressed gases are to be used at the job site,			chained to an undercarriage or fixed support.
	special precautions should be used to prevent hazardous	7.c. Cylinders should be located:
	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.
	equipment being used.		• A safe distance from arc welding or cutting operations and
6.c. When not welding, make certain no part of the electrode			any other source of heat, sparks, or flame.
	circuit is touching the work or ground. Accidental contact	7.d. Never allow the electrode, electrode holder or any other
	can cause overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until the			electrically “hot” parts to touch a cylinder.
	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.
	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.
	Substances”, AWS F4.1 from the American Welding Society	7.g. Read and follow the instructions on compressed gas
	(see address above).
6.e. Vent hollow castings or containers before heating, cutting or			cylinders, associated equipment, and CGA publication P-l,
			“Precautions for Safe Handling of Compressed Gases in
6.f.	welding. They may explode.		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,
	cuffless trousers, high shoes and a cap over your hair. Wear		powered equipment.
	Always wear safety glasses with side shields when in a
	welding area.		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.
	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 cir-		Electrical Code, all local codes and the manufacturerʼs
	cuits. This can create fire hazards or overheat lifting chains		recommendations.
	or cables until they fail.	8.c. Ground the equipment in accordance with the U.S. National
6.h. Also see item 1.c.			Electrical Code and the manufacturerʼs recommendations.
6.I. Read and follow NFPA 51B “ Standard for Fire Prevention		Jan, 07
	During Welding, Cutting and Other Hot Work”, available
	from NFPA, 1 Batterymarch Park,PO box 9101, Quincy, Ma
	022690-9101.
6.j. Do not use a welding power source for pipe thawing.