Learning Objectives

See Module 5.

Discuss procedures; flashbacks and backfires, types of joints, manufacture of oxygen, manufacture and nature of acetylene, and identify the thread type on all connections. (COM)

For butt weld refer to SIAST modules or recommended resources.

Note: For Autobody include the plug (button hole) weld.

Run lines of fusion without the use of filler rod, in the flat position, on 14 and 16 gauge mild steel -- 75mm (3") x 75mm (3") – a coupon. Four beads are required. (NUM)

Note: For Autobody include 20, 22 gauge mild steel also.

Student assessment criteria:

• Perform an oxy-acetylene test.
• Five practical hours are required to completed a coupon. Each successive test would require a maximum of one hour.
• Four evenly spaced beads are required.
• Slight penetration is permissible.
• Concave beads with uniform ripples are allowed.
• Beads must be straight and even with no holes.
• Buff and clean a completed coupon.

Learning Objectives

Perform an edge weld, no filler rod in the flat position, on 14 and 16 gauge mild steel. Use two pieces: 25mm (1") x 75mm (3"). (NUM)

• Two hours of practice are required to complete a coupon for the first edge test.
• Each successive test would require a maximum time of one hour.
• Bead has even uniform ripples. (CCT)
• Weld both edges.

Note: The Autobody Apprenticeship route requires that students weld 20 and 22 gauge metal in the flat position for Learning Objective 9.2.

Learning Objectives

fusion welding processes.

Review Modules 5 and 9.

Refer to Modules 1 and 2 on safety.

Demonstrations should be performed. (TL, CCT)

Examine and discuss all weld faults. (COM, PSVS)

Notes

Follow this procedural outline: assignment (assignment name), base metal (size and metal type), preparation (cleaning, grinding), fit up (spacing and tacking), filler rod (size and type), tip size (size selected), heat adjustment (low to high heat volume), and technique (number of passes).

Practical assignments: beads no filler (3 hours), edge weld (1 hour), corner weld (1 hour), beads with filler (3 hours), butt welds (3 hours), and lap weld (1 hour). (COM)

After completing practical assignments, the student could complete a project (8 hours).

Perform an outside corner weld, no filler rod, in the flat position, on 14 and 16 gauge mild steel. Use two pieces: 25mm (1") x 75mm (3"). (NUM)

• Two hours of practice are required to complete a coupon for the first corner joint test.
• Each successive test would require a maximum time of one hour.
• Tack weld each end and set at 90º.
• Requires slight penetration.
• Requires a smooth, uniform bead with no overhang.

Run lines of fusion using filler rod, in the flat position, on 14 and 16 gauge mild steel. Use one piece: 75mm (3") x 75mm (3"). Three beads are required. (NUM) Various criteria apply:

• Use a filler rod for the first test.
• Five hours of practice are required to complete a coupon.
• Each successive test would require a maximum of one hour.
• Three evenly spaced beads.
• Slight penetration along entire length.
• Slight convex bead.
• Blended edges along bead.
• No overlap, undercut, or holes. (CCT)

Notes

Perform a butt weld using filler rod, in the flat position, on 16 gauge mild steel. Use two pieces: 25mm (1") x 75mm (3") – a coupon. (NUM) Various criteria apply.

• Three hours of practice are required to complete a coupon.
• Each successive test would require a maximum of one hour.
• Slight, complete penetration required.
• A slight convex bead is required along the entire length.
• A smooth uniform bead is required.
• Free of holes.
• #13 grade 10 minimum requirement.
• #13 and #16 grade 12 minimum requirements.
• See drawing sheets for Level I.

Assess students on welding equipment (setting up and operating), knowledge of oxy-acetylene gases and equipment, and oxy-acetylene practices, especially oxy-acetylene welding -- the flat position.

Learning Objectives

11.2B To practice the various

types of welds. (TL, CCT, NUM)

Perform a butt weld using filler rod, in the flat position, on 16 gauge mild steel. Use two pieces: 25mm (1") x 75mm (3"). (NUM) Criteria apply.

• Three hours of practice are required to complete a coupon.
• Each successive test would require a maximum of one hour.
• Slight, complete penetration required.
• A slight convex bead is required along the entire length.
• A smooth uniform bead is required.
• Free of holes. (CCT)

Perform a butt weld using filler rod, in the vertical position, on 14 gauge or 16 gauge mild steel. Use two pieces: 25mm (1") x 125mm (3") or 100mm (4") x 125mm (5"). (TL)

Perform a lap weld using filler rod, in the flat position, on 14 and 16 gauge mild steel. Use two pieces: 50mm (2") x 75mm (3"); overlap by half’ #17 grade 11 minimum requirement. Criteria apply.

• Two hours are required to complete a coupon.
• Each successive test would require a maximum of one hour.
• Smooth, flat weld.
• No holes or melt through.
• No undercut.
• Weld both sides.

Perform a Tee weld, using filler rod, in the flat position, on 14 and 16 gauge mild steel. Use two pieces -- one 50mm (2") x 75mm (3"), and one 25mm (1") x 75mm (3"). Weld both fillets. Criteria apply.

• Two hours of practice are required to complete a coupon for the first Tee test. Each successive test would require a maximum time of one hour.
• Tee weld requirements.
• Bead has even uniform ripples.
• Bead is slightly convex or flat.
• Bead edge is smoothly blended with no undercut.
• No penetration sag evident.

Manufacture two rings. These rings are of 16 gauge mild steel. They are cut 50mm (2") x 300mm (12"). They are rolled to form rings, one that will fit inside the other. They are overlapped by half, tack welded and then completely welded inside and out. (TL) Criteria apply:

• 5 hours.
• Beads on the ring tests must be smooth and uniform.
• No penetration should protrude from underside.