Can you explain the process of pipefitting for water supply and drainage systems?

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    Sample interview questions: Can you explain the process of pipefitting for water supply and drainage systems?

    Sample answer:

    1. Material Selection:
    2. Understand the specific requirements of the project, including pressure rating, temperature range, and the intended use of the pipe system (water supply, drainage, etc.).
    3. Select appropriate piping materials based on the application, such as copper, PVC, CPVC, galvanized steel, or PEX.
    4. Consider factors like corrosion resistance, durability, cost, and ease of installation.

    5. Pipe Cutting and Preparation:

    6. Use a pipe cutter or saw to cut pipes to the desired lengths. Ensure clean and square cuts.
    7. Remove burrs and sharp edges from cut pipe ends using a file or reamer.
    8. Apply a thin layer of pipe dope or sealant to the male pipe threads to ensure a leak-proof connection.

    9. Pipe Bending:

    10. If necessary, bend pipes to create bends or offsets. Use a pipe bender or bending springs to achieve the desired angle or shape without kinking or collapsing the pipe.

    11. Assembling Pipe Joints:

    12. Apply a thin layer of sealant or pipe dope to the female pipe threads.
    13. Hand-tighten the pipe fitting onto the pipe until it is snug.
    14. Use a wrench or pipe wrench to tighten the fitting further, ensuring a secure connection. Avoid overtightening to prevent damage to the threads.

    15. Installing Valves and Fixtures:

    16. Determine the location of valves, faucets, and other fixtures based on the design requirements.
    17. Install valves and fixtures using appropriate fittings, ensuring proper alignment and orientation.
    18. Use sealant or Teflon tape to ensure a leak-proof seal between the valve or fixture and the pipe.

    19. Pressure Testing:

    20. Once the piping system is assembled, conduct a pressure test to check for leaks. Close all … Read full answer


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