Lincoln Electric 215 manual Fumes and Gases, Aug

ii		SAFETY			ii
				ARC RAYS can burn.
		ELECTRIC SHOCK can
				4.a. Use a shield with the proper filter and cover
		kill.		plates to protect your eyes from sparks and
		3.a. The electrode and work (or ground) circuits		the rays of the arc when welding or observing
		are electrically “hot” when the welder is on.		open arc welding. Headshield and filter lens
		Do not touch these “hot” parts with your bare		should conform to ANSI Z87. I standards.
		skin or wet clothing. Wear dry, hole-free
		gloves to insulate hands.	4.b. Use suitable clothing made from durable flame-resistant
3.b. Insulate yourself from work and ground using dry insulation.				material to protect your skin and that of your helpers from
				the arc rays.
	Make certain the insulation is large enough to cover your full		4.c. Protect other nearby personnel with suitable, non-flammable
	area of physical contact with work and ground.
	In addition to the normal safety precautions, if welding			screening and/or warn them not to watch the arc nor expose
				themselves to the arc rays or to hot spatter or metal.
	must be performed under electrically hazardous
	conditions (in damp locations or while wearing wet
				FUMES AND GASES
	clothing; on metal structures such as floors, gratings or
	kneeling or lying, if there is a high risk of unavoidable or			can be dangerous.
	scaffolds; when in cramped positions such as sitting,			5.a. Welding may produce fumes and gases
	accidental contact with the workpiece or ground) use
	the following equipment:			hazardous to health. Avoid breathing these
	• Semiautomatic DC Constant Voltage (Wire) Welder.			fumes and gases. When welding, keep
	• DC Manual (Stick) Welder.			your head out of the fume. Use enough
	• AC Welder with Reduced Voltage Control.			ventilation and/or exhaust at the arc to keep
				fumes and gases away from the breathing zone.	When
3.c. In semiautomatic or automatic wire welding, the electrode,				welding with electrodes which require special
				ventilation such as stainless or hard facing (see
	electrode reel, welding head, nozzle or semiautomatic			instructions on container or MSDS) or on lead or
	welding gun are also electrically “hot”.			cadmium plated steel and other metals or coatings
3.d. Always be sure the work cable makes a good electrical				which produce highly toxic fumes, keep exposure as
				low as possible and below Threshold Limit Values (TLV)
	connection with the metal being welded. The connection			using local exhaust or mechanical ventilation. In
	should be as close as possible to the area being welded.			confined spaces or in some circumstances, outdoors, a
3.e. Ground the work or metal to be welded to a good electrical				respirator may be required. Additional precautions are
	(earth) ground.			also required when welding on galvanized steel.
3.f.	Maintain the electrode holder, work clamp, welding cable and		5. b. The operation of welding fume control equipment is affected
				by various factors including proper use and positioning of
	welding machine in good, safe operating condition. Replace			the equipment, maintenance of the equipment and the spe-
	damaged insulation.			cific welding procedure and application involved.	Worker
3.g. Never dip the electrode in water for cooling.				exposure level should be checked upon installation and
				periodically thereafter to be certain it is within applicable
3.h. Never simultaneously touch electrically “hot” parts of				OSHA PEL and ACGIH TLV limits.
	electrode holders connected to two welders because voltage		5.c. Do not weld in locations near chlorinated hydrocarbon vapors
	between the two can be the total of the open circuit voltage			coming from degreasing, cleaning or spraying operations.
	of both welders.			The heat and rays of the arc can react with solvent vapors to
3.i. When working above floor level, use a safety belt to protect				form phosgene, a highly toxic gas, and other irritating prod-
	yourself from a fall should you get a shock.			ucts.
3.j.	Also see Items 6.c. and 8.		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.
			AUG 06

POWER MIG 215