Lincoln Electric K2704-2, K2704-3 manual Electric Shock can kill ARC Rays can burn, Fumes and Gases

ii	SAFETY								ii
	ELECTRIC SHOCK can kill.				ARC RAYS can burn.
	3.a. The electrode and work (or ground) circuits				4.a. Use a shield with the proper filter and cover
	are electrically “hot” when the welder is on.				plates to protect your eyes from sparks and
	Do not touch these “hot” parts with your bare				the rays of the arc when welding or observing
	skin or wet clothing. Wear dry, hole-free				open arc welding. Headshield and filter lens
	gloves to insulate hands.	4.b. Use			should conform to ANSI Z87. I standards.
3.b. Insulate yourself from work and ground using dry insulation.					suitable clothing made from durable flame-resistant
	Make certain the insulation is large enough to cover your full			material to protect your skin and that of your helpers from
	area of physical contact with work and ground.			the arc rays.
	In addition to the normal safety precautions, if welding	4.c. Protect other nearby personnel with suitable, non-flammable
	must be performed under electrically hazardous			screening and/or warn them not to watch the arc nor expose
	conditions (in damp locations or while wearing wet			themselves to the arc rays or to hot spatter or metal.
	clothing; on metal structures such as floors, gratings or
					FUMES AND GASES
	accidental contact with the workpiece or ground) use
	scaffolds; when in cramped positions such as sitting,
	kneeling or lying, if there is a high risk of unavoidable or				can be dangerous.
	the following equipment:								gases
	• Semiautomatic DC Constant Voltage (Wire) Welder.				5.a. Welding may	produce	fumes and
	• DC Manual (Stick) Welder.				hazardous to health. Avoid breathing these
	• AC Welder with Reduced Voltage Control.				fumes and gases. When welding, keep
					your head out of the fume. Use enough
3.c. In semiautomatic or automatic wire welding, the electrode,					ventilation and/or exhaust at the arc to keep
			fumes and gases away from the breathing zone.						When
	electrode reel, welding head, nozzle or semiautomatic		welding with electrodes which require special
	welding gun are also electrically “hot”.		ventilation such as stainless or hard facing (see
3.d. Always be sure the work cable makes a good electrical			instructions on container or MSDS) or on lead or
			cadmium plated steel and other metals or coatings
	connection with the metal being welded. The connection		which produce highly toxic fumes, keep exposure as
	should be as close as possible to the area being welded.		low as possible and within applicable OSHA PEL and
3.e. Ground the work or metal to be welded to a good electrical			ACGIH TLV limits using local exhaust or mechanical ven-
			tilation. In confined spaces or in some circumstances,
3.f.	(earth) ground.		outdoors, a respirator may be required. Additional pre-
	Maintain the electrode holder, work clamp, welding cable and		cautions are also required when welding on galvanized
	welding machine in good, safe operating condition. Replace		steel.
	damaged insulation.	5. b. The operation of welding fume control equipment is affected
3.g. Never dip the electrode in water for cooling.				by various factors including proper use and positioning of the
				equipment, maintenance of the equipment and the specific
3.h. Never simultaneously touch electrically “hot” parts of				welding procedure and application involved.				Worker expo-
	electrode holders connected to two welders because voltage			sure level should be checked upon installation and periodi-
	between the two can be the total of the open circuit voltage			cally thereafter to be certain it is within applicable OSHA PEL
	of both welders.			and ACGIH TLV limits.
3.i.	When working above floor level, use a safety belt to protect	5.c. Do not weld in locations near chlorinated hydrocarbon vapors
				coming from degreasing, cleaning or spraying operations.
	yourself from a fall should you get a shock.			The heat and rays of the arc can react with solvent vapors to
3.j.	Also see Items 6.c. and 8.			form phosgene, a highly toxic gas, and other irritating prod-
				ucts.
		5.d. Shielding gases used for arc welding can displace air and
			cause injury or death. Always use enough ventilation,
			especially in confined areas, to insure breathing air is safe.
		5.e. Read and understand the manufacturerʼs instructions for this
				equipment and the consumables to be used, including the
				material safety data sheet (MSDS) and follow your
				employerʼs safety practices. MSDS forms are available from
				your	welding distributor or	from	the	manufacturer.
		5.f. Also see item 1.b.

Jan ʻ09