1 copyright 2004 lincoln global inc. oxyfuel gas welding & cutting ofw&ofc
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11Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Oxyfuel Gas Welding & CuttingOxyfuel Gas Welding & Cutting
OFWOFW
&&
OFCOFC
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
What is OFW?What is OFW?
OFWOFW = Oxygen Fuel Gas Welding = Oxygen Fuel Gas Welding• Requires Fuel Gas & OxygenRequires Fuel Gas & Oxygen• Uses Tanks, Regulators, Hoses, and Torches Uses Tanks, Regulators, Hoses, and Torches • Requires Peripheral Requires Peripheral
Equipment Equipment • (i.e., Mask, Flint Lighter,(i.e., Mask, Flint Lighter,
Tank Wrench, andTank Wrench, andTip Cleaners) Tip Cleaners)
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Bead without Filler MetalBead without Filler Metal
Bead with Filler MetalBead with Filler Metal
Oxyfuel Gas WeldingOxyfuel Gas Welding
A group of welding processesA group of welding processes
that produces coalescence of that produces coalescence of
workpieces by heating them workpieces by heating them
with an oxyfuel gas flame. with an oxyfuel gas flame.
The processes are used with The processes are used with
or without the application or without the application
of pressure and with or of pressure and with or
without filler metal.without filler metal.
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
AdvantagesAdvantages
• Low Cost EquipmentLow Cost Equipment
• No Electricity RequiredNo Electricity Required
• All Position WeldingAll Position Welding
• Extremely PortableExtremely Portable
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
AdvantagesAdvantages
• Variety of ThicknessVariety of Thickness
• No SlagNo Slag
• No SpatterNo Spatter
• High Quality WeldsHigh Quality Welds
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Limitations Of OFWLimitations Of OFW
• Primarily Ferrous MaterialsPrimarily Ferrous Materials
• Must Operate under “Hot Must Operate under “Hot
Zone” Concept Zone” Concept
• (Fire Hazard)(Fire Hazard)
• Various Hazards Various Hazards
Associated with Fuel Associated with Fuel
Gases, Oxygen and High Gases, Oxygen and High
Pressure Gases Pressure Gases
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Limitations Of OFWLimitations Of OFW
• Flashbacks & BackfiresFlashbacks & Backfires
• Often SlowOften Slow
• Cannot Weld with All Fuel GasesCannot Weld with All Fuel Gases
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
What is OFC?What is OFC?
OFCOFC = Oxygen Fuel Gas Cutting = Oxygen Fuel Gas Cutting• Requires Fuel Gas & OxygenRequires Fuel Gas & Oxygen• Uses Tanks, Regulators, Hoses,and Torches Uses Tanks, Regulators, Hoses,and Torches • Requires Peripheral Requires Peripheral
Equipment Equipment • (i.e., Mask, Flint Lighter,(i.e., Mask, Flint Lighter,
Tank Wrench, and Tank Wrench, and Tip Cleaners) Tip Cleaners)
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
OxyFuel Gas CuttingOxyFuel Gas Cutting
A group of oxygen based cutting A group of oxygen based cutting
processes that uses heat fromprocesses that uses heat from
an oxyfuel gas flame to bring up toan oxyfuel gas flame to bring up to
the kindling temperature and helpsthe kindling temperature and helps
maintain the cut on steel. maintain the cut on steel.
Severing of the material is achievedSevering of the material is achieved
by the oxygen jet which burns theby the oxygen jet which burns the
iron in the steel, which has beeniron in the steel, which has been
heated to kindling temperatureheated to kindling temperatureby oxyfuel preheat flames. by oxyfuel preheat flames.
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
AdvantagesAdvantages
• No Electricity RequiredNo Electricity Required
• All Position CuttingAll Position Cutting
• Extremely PortableExtremely Portable
• Low Cost EquipmentLow Cost Equipment
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
AdvantagesAdvantages
• Suitable for Cutting Thick Suitable for Cutting Thick
& Thin Materials& Thin Materials
• Can be Readily Used Can be Readily Used
UnderwaterUnderwater
• Requires Moderate Requires Moderate
Operator Skill LevelOperator Skill Level
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
LimitationsLimitations
• Materials Limited, Materials Limited,
Primarily Ferrous Primarily Ferrous
• Additional Operator Protection Additional Operator Protection
NecessaryNecessary
• Must Operate under “Hot Zone” Must Operate under “Hot Zone”
Concept Concept
• (Fire Hazard)(Fire Hazard)
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
LimitationsLimitations
• Various Hazards Associated Various Hazards Associated
with Handling of Fuel Gases with Handling of Fuel Gases
and High Pressure Gases and High Pressure Gases
• Flashbacks and BackfiresFlashbacks and Backfires