120102f Welding Symbols Flashcards
The purpose of welding symbols is to:
a) make the drafting job complete.
b) convey necessary welding information from designer to welder.
c) specify the type of weld to use.
d) convey necessary weld dimensions.
b) convey necessary welding information from designer to welder.
Define weld symbol.
A weld symbol is a pictograph that indicates the desired type of weld.
List the four (4) types of welds included in the basic weld symbols.
a) surfacing
b) fillet
c) plug or slot
d) groove
Define welding symbol.
A welding symbol is an assembled symbol that combines multiple weld symbols into one giving all the information necessary for preparing and/or welding the joint.
List the eight (8) elements of a welding symbol.
a) reference line
b) arrow line
c) basic weld symbols
d) dimensions and other data
e) supplementary symbols
f) finish symbols
g) tail
h) specifications process or other references.
Of the eight (8) elements of a welding symbol, which two (2) must always appear?
a) reference line
b) arrow line
Briefly describe and explain these supplementary welding symbols.
a) weld all around
b) field weld
c) contour and finish
d) melt through
a) A joint that requires welding all around one side (or both sides if shown) is
designated by an open circle where the arrow line joins the reference line.
b) Field welds are indicated by a solid black flag pointing to the weld symbol
located where the arrow line joins the reference line.
c) A contour symbol is used to indicate the desired shape of the weld surface as concave, flat or convex. It may be accompanied by a letter (M, C or G for
machined, chipped or ground) to indicate how the shape is attained.
d) A solid semicircle opposite a groove weld symbol indicates that penetration through the thickness of the material is required. This weld is done from the same side as the groove weld.
Briefly explain the following terms.
a) arrow side
b) other side
c) both sides
a) The arrow side of the welding symbol refers to the side (bottom) of the reference line closest to the reader when reading the drawing. It refers to welding done on the side of the weld joint to where the arrow line points.
b) The other side of the welding symbol refers to the side (top) of the reference line farthest from the reader. It refers to welding done on the side of the weld joint opposite to where the arrow line points.
c) With the exception of the melt through symbol, weld symbols that appear on both sides of the reference line mean that welding is done on both sides of the weld joint.
What is the purpose of a broken arrow line?
A broken arrow line is used with bevel groove and J groove weld symbols to indicate which side of the joint requires the preparation. The break is preferred, but may be ignored if the joint design makes it obvious which side needs preparation.
The tail on a welding symbol is used for:
a) determining arrow side or other side.
b) joints using fillet welds only.
c) information that cannot be put into symbol form.
d) indicating which side of the joint must be prepared.
c) information that cannot be put into symbol form.
List three (3) weld symbols that have one leg perpendicular to the reference line.
a) fillet weld symbol
b) bevel groove weld symbol
c) J groove weld symbol
In a correctly drawn welding symbol, the reference line must:
a) have a single arrow only.
b) be drawn horizontally.
c) be drawn with a tail.
d) have all weld symbols on the arrow side.
b) be drawn horizontally.
A field weld is shown on the welding symbol by a:
a) solid black circle.
b) notation in the tail.
c) ring around the weld symbol.
d) solid black flag.
d) solid black flag.
A surfacing weld symbol is always drawn on the ________________ side of the
reference line.
a) arrow
b) other
c) right
d) left
a) arrow
A weld symbol must depict the:
a) three most essential elements of the weld.
b) desired shape of the weld to be applied.
c) joint dimensions and welding process.
d) member that is to be prepared and where it is welded.
b) desired shape of the weld to be applied.
In Table 4, draw the welding symbol for each description on the left.
Figure 71 shows the correct symbols.
Describe the welds represented by the welding symbols in Figure 66.
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a) single J groove weld, other side, fillet weld arrow side
b) fillet weld both sides, arrow side made flat by chipping.
c) fillet weld arrow side, single bevel groove weld other side
d) single U groove weld, all around, arrow side
e) fillet weld all around, other side field weld to specification J-2
f) single square groove weld, arrow side
g) double Vee groove w’eld, finished flat by welding arrow side
h) single J groove weld arrow side, single U groove weld other side
i) single Vee groove weld other side, back weld arrow side
j) single bevel groove weld arrow side, melt through is to be ground flat
k) surface to be built up by welding
l) plug weld on other side, machine flat
Describe the welds represented by the welding symbols in Figure 66.
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m) slot weld on arrow side to specification 23
n) double square groove weld, arrow side made convex by chipping, other side made flat by grinding
o) staggered intermittent fillet weld to specification a3
p) double J groove weld with fillet weld on arrow side
q) fillet weld on other side, single bevel groove weld and fillet weld on arrow side
r) single Vee groove weld other side, single U groove weld arrow side
s) chain intermittent fillets welds, 50 mm long, 200 mm pitch, both sides, arrow side ground flat
t) double bevel groove weld with fillet weld on other side.
u) double LJ groove weld, arrow side welded flat.
v) single bevel groove weld other side, single J groove weld arrow side
w) double J groove welds with fillet welds both sides
x) single square groove weld and fillet weld on arrow side single bevel groove weld on other side.
Use Figure 67 to answer the questions. From the welding symbols in the left-hand column, show the preparation, dimensions and outline of the completed weld in the right-hand column. Use dotted lines to show preparation and solid lines to show the weld.
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Figure 72 shows the correct diagrams
Use Figure 67 to answer the questions. From the welding symbols in the left-hand column, show the preparation, dimensions and outline of the completed weld in the right-hand column. Use dotted lines to show preparation and solid lines to show the weld.
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Figure 72 shows the correct diagrams
Use Figure 68 to answer the questions. From the weld shown in the right-hand column, show the complete welding symbol on the reference lines in the left-hand column.
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Figure 73 shows the correct diagrams
Use Figure 68 to answer the questions. From the weld shown in the right-hand column, show the complete welding symbol on the reference lines in the left-hand column.
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Figure 73 shows the correct diagrams
Write down the information given on the following welding symbols listing the proper sequence for a) and b) in in Figure 69.
a) First step: U groove preparation is welded on the arrow side in the field.
Second step: joint is back gouged to sound metal with a U groove configuration and welded in the field.
b) First step: single bevel groove preparation is welded all around from the arrow side in the field with full penetration as indicated by the melt through symbol.
Second step: a fillet weld is applied all around on the arrow side in the field.
In Figure 70 fill in the figure on the right with the appropriate preparation, weld and finish. Use dotted lines for the preparation, and solid lines for the welds.
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Figure 74 shows the correct diagrams.
In Figure 70 fill in the figure on the right with the appropriate preparation, weld and finish. Use dotted lines for the preparation, and solid lines for the welds.
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Figure 74 shows the correct diagrams.
