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Chapter 6

Chapter 6. Joining, Installing, and Supporting Pipe. Plastic Pipe Joints • Copper Tube Joints • Cast Iron Soil Pipe Joints • Steel Pipe Joints • Installing and Supporting Pipe.

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Chapter 6

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  1. Chapter 6 Joining, Installing, and Supporting Pipe Plastic Pipe Joints • Copper Tube Joints • Cast Iron Soil Pipe Joints • Steel Pipe Joints • Installing and Supporting Pipe

  2. Personal protective equipment, including proper eye and skin protection, must be worn when working with cleaners, primers, and solvent cements.

  3. Primers are required for PVC and CPVC plastic pipe and typically contain a permanent dye or pigment that shows that the primer has been applied to the pipe and fittings.

  4. Solvent cement cure times will need to be adjusted, depending on outside temperature.

  5. Solvent cement softens plastic pipe and fittings, ensuring a tight joint when the pipe is forced all the way into the fitting.

  6. The proper preparation and installation techniques must be used to ensure watertight and airtight solvent-cemented joints.

  7. An expander tool is used to expand the end of PEX tubing manufactured using the Engel process.

  8. A crimping tool is used to compress the sleeve on PEX tubing manufactured using the silane or radiation process.

  9. Push-type PEX fittings connect PEX tubing by using an internal interlocking mechanism.

  10. The three techniques of heat fusion are socket, butt, and sidewall fusion.

  11. Electrofusion is the process of joining two PE pipes together using an internally heated coupling.

  12. Mechanical couplings joining two ends of PE pipe provide leakproof joints that also resist pressure.

  13. Capillary attraction draws molten solder into the gap between the copper tube and fitting.

  14. The pasty range is the working temperature range for a particular type of solder.

  15. Copper tube and fittings must be properly prepared and joined to ensure a leakproof joint.

  16. The proper brazing temperature is achieved when the fitting becomes dull red or the flux becomes clear.

  17. In the brazing process, heat is applied to the joint and a filler metal is used to fill the gap between the fitting and tube.

  18. Copper press fittings of 1/2″ to 2″ are installed without soldering by using a pressing tool to press the fittings together.

  19. Copper press fittings of 21/2″ to 4″ are installed without soldering by using a pressing tool and pressing ring to press the fittings together.

  20. The depth, width, and location of a rolled groove must be accurate to ensure a watertight joint.

  21. Copper rolled groove joints are used for aboveground potable water supply applications.

  22. A pi tape is used to measure the groove diameter of rolled groove pipe.

  23. A branch tee is extruded from the wall of copper tube using a T-drill fitted with a collaring head.

  24. An impact flaring tool can be used to flare types K and L copper tube.

  25. A yoke-and-screw flaring tool flares the end of copper tube to accept the end of the fitting.

  26. Compression joints consist of a compression fitting, compression ring, compression nut, and copper tube being joined.

  27. Lengths of no-hub cast iron soil pipe must be properly aligned and joined to create a leakproof joint.

  28. Compression gaskets provide a leakproof joint between the bell and spigot.

  29. NPT are tapered 3/4″ per foot of thread length so that the pipe and fittings will make up tightly to form a leakproof joint.

  30. Male (external) pipe threads are cut at the ends of pipe to engage properly with the fitting threads.

  31. Dig holes under underground drainage and waste pipe couplings, bells, or joints so pipe firmly rests on its barrel.

  32. Proper backfilling procedures ensure that underground pipe remains in position.

  33. Pipe hangers and supports are anchored to structural members, such as beams, studs, or joists, to ensure proper stability, support, and alignment of pipe.

  34. Brackets are used to support horizontal and vertical pipes, and are attached to wood and metal framing members and adjacent pipes.

  35. Riser clamps, pipe straps, and extension split pipe clamps maintain alignment of vertical pipe.

  36. A variety of hangers, clamps, and hooks are available to support horizontal pipe.

  37. Plastic pipe conveying hot water waste must be supported on continuous wood strips or angle iron for its entire length.

  38. Hangers must be placed adjacent to no-hub couplings.

  39. Sway bracing is used when cast iron soil pipe is suspended more than 18"from a ceiling using nonrigid hang­ers.

  40. Closet bends must be properly supported horizontally and vertically to prevent movement.

  41. Stacks must be properly supported at their bases.

  42. PEX tubing must be properly supported to prevent kinking and abrasion of the tubing.

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