Introduction to Agricultural Science and Technology Oxyactylene Welding

Objectives Define the chapter terms on an exam with 90% accuracy. Describe the proper/safe way to turn the oxyacetylene rig on and off on an exam with 100% accuracy. Identify the different welding tips on an exam with 90% accuracy. Demonstrate the safe/proper use of an oxyacetylene welding rig in a laboratory activity with 100% accuracy.

Why do we need to learn about oxyacetylene rigs and manifold systems? Why is it important to understand the steps to start and stop an oxyacetylene rig? Why is it important to use proper safety techniques while using an oxyacetylene welding manifold system?

Parts Identification

Starting the rig Check and make sure gauges are at zero and there are no issues with rig Acetylene FIRST on everything Crack acetylene cylinder valve Turn ½ turn Turn on acetylene torch valve all of the way Set working pressure gauge with regulator to 5 psi Turn off acetylene torch valve

Continued Open oxygen cylinder valve all of the way Open oxygen torch valve all the way Set working pressure gauge with regulator to 5 psi Turn off oxygen torch valve Crack acetylene torch valve Light the torch Add oxygen until distinct cone appears

Stopping Shut acetylene torch valve off first Then oxygen Shut off acetylene cylinder valve Bleed acetylene lines Back out acetylene regulator three turns

Safety Wear safety glasses at all times When starting the rig, wear dark safety glasses Wear gloves at all times Make sure you have a good striker

Remember Acetylene is red Oxygen is Green NEVER use Acetylene above 15 PSI (5 for welding)

Quiz