Transcript Welding Symbols

PowerPoint to accompany
Welding
Principles and Practices
Third Edition
Sacks and Bohnart
Welding
Symbols
Chapter 30
1
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Permission required for reproduction or display.
Objectives
1. Know the name of the AWS standard for
welding symbols
2. List the eight elements that may be found on a
welding symbol
3. List the basic weld symbols
4. List the supplementary symbols
5. Name the five basic joints
6. Identify the applications of the different weld
symbols
30 - 2
American Welding Society
• Material in this chapter reprinted through
courtesy of AWS
– Symbols include latest revision
• For more detailed reference
– Booklet Standard Symbols for Welding, Brazing,
and Nondestructive Examination (AWS A2.4-98)
• Published by the AWS
• Many companies develop own system of
symbols, references with AWS as base
30 - 3
ANS Symbol System
• Joint
– Basis of reference
• Welded joint indicated by symbol will have
arrow side and other side
• Use tail of reference line for giving
specifications for welding
– Welding process; type and brand of filler metal;
where or not peening, chipping or preheating
required and other information
30 - 4
Welding Symbol Components
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30 - 5
Examples of Arrow Symbols
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30 - 6
AWS Standard
• Weld symbol
– Graphic symbol that indicates weld required
• Welding symbol
– Following eight elements:
•
•
•
•
Reference line (required)
Arrow (required)
Basic weld symbols
Dimensions and other data
•Supplementary symbols
•Finish symbols
•Tail
•Other specifications
Standard welding symbols given in Table
30-1
30 - 7
Basic Weld Symbols
AWS
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30 - 8
Basic Weld Symbols
AWS
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30 - 9
Welding Symbols
AWS
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30 - 10
Filet Welds and Symbol
• Fillet weld triangular-shaped weld placed on
the joint
• Fillet weld symbol triangular in shape
– Vertical line of fillet weld symbol always drawn to
left of symbol
– Size always shown to left of symbol and length to
right of symbol
• No length given, then weld should run full length of joint
30 - 11
Examples:
Fillet Welds on T-Joints
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30 - 12
Example: Fillet Weld Length
and Pitch Indications
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30 - 13
Weld-All-Around Symbol
• Used when weld is to extend all way around
joint or series of connected joints
• Symbol: circle viewable at junction of
reference line and arrow
30 - 14
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Groove Welds
• Seven types of groove welds and symbols to
represent them
–
–
–
–
–
–
–
Square
V
Bevel
U
J
Flare-V
Flare-bevel
Symbols take the shape
of the groove the weld
is to be placed in.
30 - 15
Groove Welds
• Place in a joint
• Used to make butt joints, but can be used to
make other types of joints
• Double bevel
– One of joint members has bevel on both sides and
joint is to be welded from both sides
– V shape
30 - 16
V-groove Weld on Butt Joint
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30 - 17
Double V-groove Weld
on Butt Joint
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30 - 18
Contour Symbol
• Desired shape of weld shown on welding
symbol
• Located above imaginary face of weld for
groove weld symbols and above side of
triangle that most closely represents face of
weld
– Flat: straight line
– Concave and convex: takes on that shape
30 - 19
Contour Symbol and Letters
Which Indicate Finishing Method
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30 - 20