Piping Drawings Chapter 21

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 2 Objectives Identify cast iron, brass, copper, and thermoplastic pipe and tubing fittings Draw and label common pipe joints using ANSI/ASME standard designations

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 3 Objectives (cont.) Draw multiview or pictorial piping drawings using standard schematic symbols Draw the schematic symbols for valves and identify flow direction

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 4 Standard Symbols

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 5 Types of Drawings Two types of drawings are common for piping systems: Single-line drawings show the center-line of the pipe Double-line drawings show two lines representing the pipe diameter

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 6 Types of Drawings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 7 Types of Drawings Axonometric drawings may be used

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 8 Types of Drawings Piping may also be shown in a dimetric drawing or in orthographic projection In a developed piping drawing, vertical pipes are revolved into the horizontal plane or horizontal pipes revolved into the vertical plane so the entire installation can be shown on one plane

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 9 Types of Drawings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 10 Dimensioning Piping Drawings In dimensioning piping drawings, give distances from: Center to center, Center to end, or End to end of fittings or valves Give the lengths of all straight runs Show the size of each pipe

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 11 Dimensioning Piping Drawings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 12 Steel and Wrought-Iron Pipe Steel or wrought-iron pipe is commonly used for water, steam, oil, and gas Steel pipe is available as: Black pipe for natural gas Galvanized pipe for water distribution

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 13 Cast-Iron Pipe Cast-iron (C.I.) pipe is used for water or gas service and as soil pipe Generally water and gas pipes are connected with bell and spigot joints or flanged joints Cast-iron pipe is brittle and settling can cause fracture unless the joints are sufficiently flexible

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 14 Cast-Iron Pipe Joints

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 15 Seamless Brass and Copper Pipe Brass and copper pipe is used in plumbing for supply, soil, waste, drain, and vent lines Brass and copper pipe should be joined with fittings of copper-base alloy to avoid corrosion Both screwed and flanged fittings are available

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 16 Screwed Fittings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 17 Copper Tubing Copper tubing is used in applications for nonferrous construction It is suitable for process work, for plumbing, and for heating systems Copper tubing joints are made with flared joints or solder joints

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 18 Copper Tubing

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 19 Solder Fittings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 20 Plastic and Specialty Pipes A wide variety of plastic pipe, both rigid and flexible, is used in construction Plastic pipe is lightweight, corrosion proof, resistant to many chemicals, and has a smooth inner surface which offers low flow resistance

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 21 Plastic and Specialty Pipes Types of plastic pipes include: PVC (polyvinyl chloride) CPVC (chlorinated polyvinyl chloride) HDPE (high density polyethylene)

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 22 Pipe Fittings Pipe fittings are used to: Join lengths of pipe Provide changes of direction Provide branch connections at different angles Effect a change in size

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 23 Pipe Fittings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 24 Pipe Fittings

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 25 Pipe Joints The joints between pipes, fittings, and valves may be: Screwed Flanged Welded Soldered

Technical Drawing 13 th Edition Giesecke, Mitchell, Spencer, Hill Dygdon, Novak, Lockhart © 2009 Pearson Education, Upper Saddle River, NJ All Rights Reserved. 26 Valves Valves are used to stop or regulate the flow of fluids in a pipe line and include: Globe valves Check valves Gate valves Solenoid actuated valves