Symbols, Welding and Piping

1
Symbols, Welding and Piping
2
Symbols

• Links are drawn in schematic form on technical
  drawings and for engineering design analysis.
• This figure shows the schematic symbols used for
  linkage drawings.
• With CAD, these symbols can be drawn once, placed
  in a symbols library, then used on many drawings.

3
What is welding

• Welding is a process used to join metals by the
  application of heat. Fusion welding, which
  includes gas, arc, and resistance welding,
  requires that the parent metals be melted.

4
Welding Drawing

• Welding drawing is a detailed multiview drawing
  of all the parts assembled, with accompanying
  welding symbols.

5
Weld Symbols

• AWS and ANSI have standardized the weld symbols
  used to describe welds on technical drawing. The
  weld symbol completely describes the
  specifications for welding a joint, and a bent
  line with an arrow at the end points at the joint
  to be welded.

6
The eight basic parts to a complete weld symbol
are

• Reference line
• Leader line and arrow
• Basic weld symbol (location/depth of weld)
• Finish symbol
• Weld symbol (type of weld)
• Dimensions
• Supplementary symbols
• Tail and specifications

7
The structure of the welding symbol
8
What is piping

• Piping is a thin strip of covered cord used to
  edge hems.

9
Piping Drawings

• Piping drawings are used in the design and
  construction of oil refineries, chemical plants,
  tank farms, and other applications.
• With CAD, it is possible to create a virtual
  model of the process plant in the computer.

10
Pipe Drawings

• Pipe drawings are 2-D representations of piping
  systems. Such drawing use graphic symbols for the
  design, construction, and maintenance of process
  systems.

11
Piping

• Double-line drawings represent pipes as two
  parallel, solid black lines. Double-line drawings
  take more time but are much more realistic
  looking than single-line drawings.

12
THE ENDProduction and Research

• Juan Carranza
• Rosevelt Rios
• Bassem Kheireddin
• Juan Salinas