What is the easiest way to remove a rivet with a cutting torch?

Follow the steps in the Figure 2–19.

Figure 2–19. Steps to remove rivet.

How can a countersunk rivet be removed?

See Figure 2–20.

Figure 2–20. Steps to remove a countersunk rivet.

What are two ways to pierce steel with OFC?

                        • Begin by preheating the pierce location to dull red with the torch perpendicular to the metal. When metal becomes dull red, slightly raise the torch from the surface and angle the tip away from perpendicular. This prevents the slag blown back from the surface from landing on or in the torch tip. Then squeeze the oxygen lever to start cutting action. As soon as the material is completely pierced, restore the tip to perpendicular and the preheat flame to just above the surface. Complete cutting the opening wanted.

            • If a small hole is wanted and the surrounding material is to be protected from cutting action, drill a ¼ inch (6 mm) hole at the starting point. Begin the cutting action through the hole.

Figure 2–21. Piercing steel.

What is the best way to cut out a circle?

Pierce the material inside the circle and away from the finished edge. When cutting action is established, extend the cut into a spiral and begin cutting the circle itself, Figure 2–22. With small circles to avoid damaging the finished edge, drill a ¼ inch (6 mm) hole in the center of the circle and begin the cut through the inside of the hole, then spiral out to the edge.

Figure 2–22. Cutting a circle.

What is the easiest way to sever an I-beam?

Follow the numbered steps in Figure 2–23.

Figure 2–23. Severing an I-beam.

What is the AWS designation for oxygen lance cutting?

The abbreviation for oxygen lance cutting is LOC.