Maricopa Community Colleges  ABC207   20052-20086 
Official Course Description: MCCCD Approval: 07/22/08
ABC207 20052-20086 LEC 2 Credit(s) 2 Period(s)
Fiberglass and PVC Ductwork
Materials, procedures, layout and fabrication of fiberglass ducts and ductrun fittings. Arc welding, welding electrodes, gas metal-arc and gas tungsten-arc welding processes. Safety stressed.
Prerequisites: Registered apprentice status or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABC207   20052-20086 Fiberglass and PVC Ductwork
1. Describe the materials used for fabricating fiberglass ducts and PVC boards. (I)
2. Describe the acceptable procedures necessary for the layout and fabrication of selected fiberglass and PVC ductrun fittings. (II)
3. Identify the tools and equipment necessary for the fabrication of selected fiberglass and PVC ductrun fittings. (III)
4. Layout and fabricate selected fiberglass and PVC ductrun fittings. (IV)
5. Describe the principle of arch welding and list the health and safety hazards of arch welding. (V)
6. Explain the characteristics and uses of: direct current welding machines, alternating current machines and AC-DC arc welding machines.(VI)
7. Describe the types/uses of electrodes and categorize welding electrodes according to the American Welding Society's (AWS) classification system. (VII)
8. Describe the making of button and bead welds, welding in the flat, horizontal, vertical and overhead positions with AWS electrodes demonstrating appropriate safety procedures. (VIII)
9. Decribe the basic set-ups for the gas metal-arch and gas tungsten-arch welding processes. (IX)
10. Describe the basic brazing process. (X)
11. Describe the safety precautions of governing flame cutting. (XI)
12. Light and extinguish the oxyacetylene torch properly and safely. (XII)
13. Describe the making of straight cuts on carbon steel plate. (XIII)
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MCCCD Official Course Outline:
 
ABC207   20052-20086 Fiberglass and PVC Ductwork
    I. Fiberglass/PVC composite material
        A. Fiberglass duct material
          1. Fibrous glass board
          2. Field-applied joining system
          3. Uses
          4. Designs
          5. Types and sizes
          6. Storage
          7. Other
        B. PVC duct
          1. Sheet plastic
          2. Types and sizes
          3. Characteristics
          4. Thickness
          5. Uses
          6. Tools and processes
          7. Other
      II. Layout/fabrication
          A. Fiberglass
            1. Measurement
            2. Board selection and layout
            3. Fabrication
            4. Fittings
          B. PVC ductrun fittings
            1. Welding
            2. Plastic welding equipment
            3. Good and bad weld
            4. Guidelines for welding
            5. Solvent welding
            6. Fittings
        III. Tools and equipment
            A. Fiberglass - tools/equipment
              1. Automatic grooving machines
              2. Red tool
              3. Orange tool
              4. Blue tool
              5. Gray tool
              6. Cuts all tool
              7. Other
            B. PVC tools/equipment
              1. Heat gun
              2. Hand and power cutting tools
              3. Welding equipment
              4. Solvent welding equipment
              5. Other
          IV. Ductrun fittings
              A. Fiberglass
                1. 90 degree elbow
                2. Two-way transition
                3. Other
              B. PVC ductrun fittings
                1. 90 degree rectangular elbow
                2. Rectangular transition
            V. Arc welding
                A. Principle
                B. Health hazards
                  1. Inflammation of lung
                  2. Emphysema
                  3. Fluid in lung
                  4. Other
                C. Safety hazards
                  1. Electrical shock
                  2. Arc radiation
                  3. Air contamination
                  4. Fire
                  5. Other
              VI. Characteristic/uses of arch welding machines
                  A. Direct current
                  B. Alternating current
                  C. AD-DC
                VII. Types, uses and classifications of electrodes
                    A. Types
                      1. Bare
                      2. Dusted
                      3. Flow-dipped
                      4. Extruded coated
                    B. Uses
                      1. Prevents air
                      2. Promotes fusion
                      3. Causes coating
                    C. American Welding Society (AWS) classifications
                      1. "E"=electrical welding
                      2. Tinsile strength
                      3. Welding position
                      4. Type of coating/type of arc/polarity of the electrode
                  VIII. Welding and safety
                      A. Safety
                        1. Helmets
                        2. Clothing
                      B. Button welds
                      C. Bead welds
                        1. Practice beads
                        2. Establish bead width
                      D. Pad of beads
                        1. Weaving/padding
                        2. Joint welds
                        3. T-joint weld
                        4. Edge/corner joint welds
                      E. Position arch welding
                        1. Flat
                        2. Horizontal
                        3. Vertical
                        4. Overhead
                    IX. Basic steps - MIG/TIG welding
                        A. Power source
                        B. Welding torch
                        C. Shielding gas attachments
                        D. Water cooling systems
                      X. Brazing
                          A. Process
                          B. Fluxes
                          C. Joint designs
                          D. Safety
                        XI. Flame cutting safety
                            A. Personal safety
                              1. Goggles
                              2. Gloves
                              3. Clean clothing/sleeves
                              4. Respirator
                            B. Fire prevention
                            C. Cylinder care
                            D. Care of hoses
                            E. Torch safety
                          XII. Oxyacetylene torch
                              A. Equipment
                                1. Gas cylinders
                                2. Regulators
                                3. Regulator gages
                                4. Cutting torch
                                5. Cutting tips
                                6. Hoses/fittings
                                7. Goggles
                                8. Other
                              B. Setup/operation of equipment
                                1. Cylinders
                                2. Protective caps
                                3. Cylinder valves
                                4. Connect regulators
                                5. Other
                            XIII. Carbon steel straight cuts
                                  1. Equipment
                                  2. Process
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