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BASICS OF Piping Ivy Tech Community College Definitions Page 703 DEFINITIONS The term piping can refer to any kind of pipe used in a wide range of applications. – PowerPoint PPT presentation

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Title: BASICS OF Piping

  • Ivy Tech Community College

Definitions Page 703
  • The term piping can refer to any kind of pipe
    used in a wide range of applications.
  • The word plumbing refers to the small diameter
    pipes within residences that carry water, gas,
    and waste.

Definitions Page 703
  • Large underground pipes that transport waste
    water that is taken to treatment is known as
    civil piping.
  • Piping used to transport fluids between storage
    tanks and processing equipment is called process

Definitions Page 704
  • A flow diagram is a non-scale schematic that
    illustrates the layout and composition of a
    system using symbols.
  • A pipe drawing is the most complex drawing since
    it is to scale and provides plan, elevation and
    section views.

Definitions Page 707
  • A piping isometric is a pictorial drawing that
    illustrates a pipe run in three-dimensional form.
    See figure 22.10 on page 707. Assignment 10 is
    a piping isometric pictorial drawings.
    Information from this drawing is obtained from
    the piping drawings. Some pipe drawings are done
    in isometric form because lines can be measured
    and fits checked. Isometrics are extensively
    used in chemical process industries.

Definitions Page 704 707
  • Subassemblies of pie and fittings are constructed
    by pipe fitters and welders who use the piping
    spool drawing. This drawing is usually drawn
    orthographically and shows all of the pipe and
    fittings needed to assemble a segment of piping.
    Spools often are non-scale drawings that show all
    dimensions needed for assembly. A typical spool
    drawing is shown in figure on page 707.

Types of Pipe Page 709
  • Steel Pipe Carbon steel pipe is the preferred
    above ground pipe used in industry today. It is
    strong, relatively durable and can be welded and
  • Copper pipe and copper alloys are corrosion
    resistant and have excellent heat transfer
    properties. Often used in residential water
    lines, however, plastic pipe is becoming more
    prevalent in residential water lines.

Types of Pipe Page 709
  • Plastic Pipe PVC (Polyvinyl Chloride) pipe is
    used for acids, salt solutions, alcohols, crude
    oil and other corrosive chemicals. PE
    (Polyethylene) is used for higher temperatures
    (up to 105 degrees F) and is suitable for water
    lines, sprinkler systems etc.

Types of Pipe Page 709
  • Clay pipe is formed under high pressure from
    fire clays, shales, or a combination of the two.
    It is dried then fired at 2100 degrees F. Clay
    pipe is one of the most corrosion proof pipes
    available and is used in sanitary and industrial

Pipe connection methods Page 710
  • Butt Welding is the most common method of
    joining pipes. Butt welded pipes provide a
    uniform wall thickness. Figure 22.16 shows a
    cross section of a butt weld. Pipe and fittings
    joined by butt welding are prepared with a
    beveled end to provide space for the welding

Pipe connection methods Page 710-712.
  • Other pipe connection methods include socket
    welded, screwed, flanged, soldered, bell and
    spigot, mechanical joint, solvent welding
    connection, and flaring connection

Types of valves - Page 718
  • Valves regulate fluids flow. Different valve
    types provide on/off service, regulate flow of
    fluid, provide constant pressure, prevent
    dangerous pressure buildup and prevent backflow
    in the pipe.
  • The gate valve is used to to provide on/off
    service in a pipe. Refer to figure 22.31.

Types of valves - Page 719
  • The most common type of regulating valve is the
    globe valve. Fluid flowing through the glove
    valve travels in a S pattern which allows the
    valve to maintain a close control on the flow.
    Refer to picture 22.34.

Types of valves - Page 721
  • The most common type backflow valve is a check
    valve. Check valves prevent backflow by closing
    when the fluid stops flowing.
  • Safety valves such as a pop safety valve pop wide
    open when the pressure or piece of equipment
    reaches a set pressure. These valve are used for
    steam, air and gas lines only not for liquids.
    The relief valve provides the same function but
    is for liquids.

  • Isometric drawings are more realistic than
    oblique drawings. The entire object appears as
    if it is tilted toward the viewer. The word
    isometric means equal measure. This equal
    measure refers to the angle between the three
    axes (120 deg) after the object has been tilted.
    The tilt angle is 30 degrees from horizontal.
  • All three axis lines can be measured using the
    same scale.

Double Line Drawing Pg 723
  • The double line method is the easiest to
    interpret, because it looks like the actual pipe.
    This method is used to illustrate standard
    installation and in presentation drawings that
    are rarely revised.
  • Assignment is Figure 22.50 on page 731.

ISOMETRIC 2009 page 678
  • Circles appear as ellipses in an isometric
  • A basic rule to remember about isometric drawing
    is that lines that are parallel in and orthogonal
    view must be parallel in the isometric view. The
    ISOPLANE tool makes the task of positioning
    ellipses easy as well as toggling cross hair

Settings for Isometric Drawing 2009 AutoCAD page
  • You can set your isometric variables in the snap
    and grid table of the draft settings dialog box.
    Pick ISOMETRIC SNAP. Be sure to check the SNAP
    ON (F9) and the GRID ON (F7) check boxes if you
    want SNAP and GRID modes to be activated. Notice
    the crosshairs appear angled.

Settings for Isometric Drawing 2009 AutoCAD
  • Other tools that will be helpful are the
  • ELLIPSE tool to place Isocircles when you are in
    Isometric Snap Mode.
  • Oblique dimensioning Use the DIMALIGNED and
    DIMLINEAR tools.