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Identify Oxyfuel gas welding equipment and supplies
Assessment Strategies
Written Test
Criteria
Identify various components on an Oxyfuel gas welding station
Cite the maximum safe working pressure used for acetylene gas
List all safety equipment that should be worn and used when Oxyfuel gas welding
Interpret the letters and numbers used in the American Welding Society (AWS) code for describing an Oxyfuel gas welding rod
Complete a list of equipment needed for oxyacetylene welding
Explain safety rules for the oxyacetylene workplace
Explain required eye protection for oxyacetylene welding
Differentiate between welding hoses and their characteristics
Describe parts of a welding torch
Describe welding tips and their uses
Solve problems about basic safety rules for oxyacetylene cylinders and gases
Describe effective welding tip selection
Explain filler rod selection, handling and safety
Identify welding positions
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Demonstrate Oxyfuel gas welding procedures and performance
Assessment Strategies
Skill Demonstration
Criteria
Light, adjust, and shut down an oxyacetylene welding torch in compliance with safety standards
Lay beads on flat plate with no filler rod
Lay beads on flat plate with filler rod
Weld an outside corner joint in the flat position.
You complete the welds meeting AWS standards
Demonstrate the safe storage, handling, and movement of oxygen, acetylene, and other fuel gas cylinders
Correctly and safety assemble an oxyacetylene welding station
Test all components of the oxyacetylene welding station for leaks
Produce acceptable welds using the Oxyfuel gas welding process
Start and shut-down the oxyacetylene welding station
Select the correct tip size, working pressures, and welding procedures to use for the various thicknesses of mild steel in various positions
Adjust a neutral flame and other types of welding flames
Identify good and defective welds
Complete a chart of oxyacetylene flame characteristics and uses
Implement guidelines for flame adjustment
Describe characteristics and causes of backfire and flashback
Implement guidelines for using the backhand technique
Implement guidelines for using the forehand technique
Arrange in order the steps in setting up cylinders and regulators
Demonstrate the steps in purging oxygen and fuel gas regulators
Select correct procedures for final steps in setting up oxy-fuel equipment
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Clean a cutting tip
Assessment Strategies
Written Test, Skill Demonstration
Criteria
Identify Oxyfuel gas cutting equipment, supplies, and components of gas cutting station
Cite the maximum safe working pressure used for acetylene gas
Describe advantages of oxyacetylene cutting and cutting tip design
Implement guidelines for cutting tip selection and cleaning cutting tips
Match tip cleaning tools with their uses
Implement rules for tip use
Implement guidelines for metal preparation for oxyacetylene cutting
Implement safety requirements for oxyacetylene cutting, including eye protection
Describe characteristics of manifold systems
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Produce cuts as per prints using the Oxyfuel gas cutting process
Assessment Strategies
Skill Demonstration
Criteria
Set up, adjust cutting flame, and shut down oxyacetylene cutting equipment
Create 90-degree cuts and restarts a cut on mild steel
Create a flame-beveled cut on mild steel plate
Lay out a pattern on mild steel plate and cut the pattern to specifications
Sets up and cut a 30-degree bevel with a track-type torch
You complete the cuts meeting AWS standards
Describe the function of each component of an Oxyfuel gas cutting station
Correctly and safely assemble an Oxyfuel gas cutting station with no leaks
Correctly and safely test the complete cutting station for leaks
Describe the difference between a positive-pressure and injector-type cutting torch
Select the correct cutting tip and working pressures for cutting a particular thickness of steel
Distinguish between a well-cut surface and a poorly-cut surface and adjust where necessary to perform a good cut
Describe the gouging process and state when it is used
Demonstrate safety equipment that should be worn and used when Oxyfuel gas cutting in various positions
Identify part of an oxyacetylene cutting torch
Arrange in order the steps for properly starting a cut
Complete statements about techniques for restarting a cut
Demonstrate techniques for cutting straight lines
Demonstrate techniques for controlling kerf and drag
Describe causes for characteristics of good and poor cuts