Chapter 24 Pipe Drawings

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Engineering Drawing and Design
Sixth Edition
Chapter 24
Pipe Drawings
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Chapter 24Pipe Drawings
PhotoDisk
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24-1 Pipes. Kinds of pipesPipe joints,
fittings and valvesPiping drawings
Kohler
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Kinds of pipes

• Steel and wrought-iron pipe
• Carry water, steam, oil, and gas.
• Used for applications involving high temperatures
  and pressures.

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Kinds of pipes

• Cast-iron pipe
• Often installed underground for water, gas, and
  sewage.
• Also used for low-pressure steam connections.

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Kinds of pipes

• Seamless brass and copper pipe
• Used extensively in plumbing.
• Copper tubing
• Used in plumbing and heating.
• Used where vibration and misalignment are
  factors.

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Kinds of pipes

• Plastic pipe
• Used extensively in the chemical industry because
  of its corrosion and chemical resistance.

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Pipe fittings . . .

• Are parts used to join pipe
• Three classes

• Screwed

• Welded

• Flanged

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Valves

• Are used to stop or to regulate the flow of
  liquids.

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Commonly used valves

• Gate valves
• Control the flow of liquids
• Gate lifts to allow full flow and lowers to stop
  it completely

Jenkins Bros. Ltd.
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Commonly used valves

• Globe valves
• Control the flow of liquids or gases
• Instantaneous on-and-off operation

Jenkins Bros. Ltd.
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Commonly used valves

• Check valves
• Permit flow in one direction, but check all
  reverse flow

Jenkins Bros. Ltd.
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Types of piping drawings

• Single-line drawings (simplified representation)

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Types of piping drawings

• Double-line drawings
• Used where visual appearance is more important
  than saving time
• Not recommended for production drawings

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• 24-2
• Isometric Projection of
• Piping Drawings.
• Drawing flanges and valves
• Dimensioning

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Isometric projection of piping drawings

• Method for drawing flanges

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Isometric projection of piping drawings

• Method for drawing valves

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Quick Quiz
?

• What type of valve has instantaneous on-and-off
  operation?

• A globe valve

Jenkins Bros. Ltd.
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24-3 Supplementary Piping Information

• Direction of flow, level, and slope
• Representing supports, hangers, and transition
  pieces
• Pipe runs not parallel with coordinate axes

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Specifying piping details

• Direction of flow

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Specifying piping details

• Level indicators
• Show the height of pipelines and fittings

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Specifying piping details

• Slope
• Direction

• Amount of slope

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Specifying piping details

• Support and hangers
• Transition pieces