Lincoln Electric SVM207-A service manual Fumes and Gases

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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.					should conform to ANSI Z87. I standards.
3.b. Insulate yourself from work and ground using dry insulation.					4.b. Use 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
	scaffolds; when in cramped positions such as sitting,
							FUMES AND GASES
	kneeling or lying, if there is a high risk of unavoidable or
	accidental contact with the workpiece or			ground) use			can be dangerous.
	the following equipment:
	• Semiautomatic DC Constant Voltage (Wire) Welder.						5.a. Welding may		produce	fumes and	gases
	• 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
	electrode reel, welding head, nozzle or semiautomatic					fumes and gases away from the breathing zone. When
	welding gun are also electrically “hot”.					welding with		electrodes	which	require	special
						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
	connection with the metal being welded. The connection					cadmium plated steel and other metals or coatings
	should be as close as possible to the area being welded.					which	produce	highly toxic fumes, keep exposure as
						low as possible and within applicable OSHA PEL and ACGIH
3.e. Ground the work or metal to be welded to a good electrical						TLV limits using local exhaust or mechanical ventilation. In
	(earth) ground.					confined spaces or in some circumstances, outdoors, a res-
						pirator may be required. Additional precautions are also
3.f.	Maintain the electrode holder, work clamp, welding cable and					required when welding on galvanized steel.
	welding machine in good, safe operating condition. Replace				5. b. The operation of welding fume control equipment is affected
	damaged insulation.
						by various factors including proper use and positioning of the
3.g. Never dip the electrode in water for cooling.						equipment, maintenance of the equipment and the specific
						welding procedure and application involved. Worker expo-
3.h. Never		simultaneously	touch electrically “hot” parts of			sure level should be checked upon installation and periodi-
						cally thereafter to be certain it is within applicable OSHA PEL
	electrode holders connected to two welders because voltage
						and ACGIH TLV limits.
	between the two can be the total of the open circuit voltage
	of both welders.				5.c. Do not weld in locations near chlorinated hydrocarbon vapors
3.i.	When working above floor level, use a safety belt to protect					coming from degreasing, cleaning or spraying operations.
						The heat and rays of the arc can react with solvent vapors to
	yourself from a fall should you get a shock.
						form phosgene, a highly toxic gas, and other irritating prod-
3.j.	Also see Items 6.c. and 8.					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 manufacturer’s instructions for this
						equipment and the consumables to be used, including the
						material safety data sheet (MSDS) and follow your
						employer’s safety practices. MSDS forms are available from
						your	welding	distributor or	from	the manufacturer.

5.f. Also see item 1.b.

RANGER® 3 PHASE