Part-3-AWS-Welding-Symbols-Fillet-Plug-Slot-Spot-Welds.ppt

General Provisions for AWS Welding General Provisions for AWS Welding
Symbols; Fillet, Plug, Slot and Spot Symbols; Fillet, Plug, Slot and Spot
Welds.Welds.
Compiled and presented by; Compiled and presented by;
Paul Appleton Tech Weld IPaul Appleton Tech Weld I
Reference standard: ANSI/AWS A 2.4-98 Reference standard: ANSI/AWS A 2.4-98
Available at: Public\Available at: Public\
Controlled_Business_Documents\Howden Controlled_Business_Documents\Howden
Buffalo Quality System\External Buffalo Quality System\External
Reference Standards\AWSReference Standards\AWS

Fillet Welds: Dimension LocationFillet Welds: Dimension Location

Single Fillet welds; dimensions of fillet welds shall be Single Fillet welds; dimensions of fillet welds shall be
shown on the same side of the reference line as the shown on the same side of the reference line as the
weld symbolweld symbol

The fillet weld size shall be specified to the left of the The fillet weld size shall be specified to the left of the
weld symbol.weld symbol.

Fillet Welds: Dimension LocationFillet Welds: Dimension Location

The size of a fillet weld with un-equal legs shall The size of a fillet weld with un-equal legs shall
be specified to the left of the weld symbol.be specified to the left of the weld symbol.

Weld orientation is not specified by the symbol Weld orientation is not specified by the symbol
and shall be shown on the drawing to ensure and shall be shown on the drawing to ensure
clarity.clarity.

Double Fillet Welds: Dimension Double Fillet Welds: Dimension
LocationLocation

Dimensions of fillet welds on both sides of a Dimensions of fillet welds on both sides of a
joint shall be specified whether the dimensions joint shall be specified whether the dimensions
are identical or different.are identical or different.

Fillet Weld: Drawing notesFillet Weld: Drawing notes

Dimensions of fillet welds covered by Dimensions of fillet welds covered by
drawing notes need not be repeated on drawing notes need not be repeated on
the welding symbols.the welding symbols.

Length of Fillet Welds: LocationLength of Fillet Welds: Location

The length of a fillet weld, when indicated on the The length of a fillet weld, when indicated on the
welding symbol, shall be specified to the right of the welding symbol, shall be specified to the right of the
weld symbol.weld symbol.

When a fillet weld extends the full length of the When a fillet weld extends the full length of the
joint, no length dimension need be specified on the joint, no length dimension need be specified on the
welding symbolwelding symbol

Length of Fillet Welds: LocationLength of Fillet Welds: Location

Specific lengths of fillet welds, and their Specific lengths of fillet welds, and their
location, may be specified by symbols in location, may be specified by symbols in
conjuction with dimension lines.conjuction with dimension lines.

Length of Fillet Welds: LocationLength of Fillet Welds: Location

Hatching may be used to graphically depict fillet Hatching may be used to graphically depict fillet
welds.welds.

Intermittent Fillet WeldsIntermittent Fillet Welds

The pitch of intermittent fillet welds shall be the distance The pitch of intermittent fillet welds shall be the distance
between the centers of adjacent weld segments on one between the centers of adjacent weld segments on one
side of the joint.side of the joint.

The pitch of intermittent fillet welds shall be specified to The pitch of intermittent fillet welds shall be specified to
the right of the length dimension following a hyphen. the right of the length dimension following a hyphen.

Chain Intermittent Fillet WeldsChain Intermittent Fillet Welds

Dimentions of chain intermittent fillet welds shall Dimentions of chain intermittent fillet welds shall
be specified on both sides of the reference line.be specified on both sides of the reference line.

The segments of chain intermittent fillet welds The segments of chain intermittent fillet welds
shall be opposite one another accross the jointshall be opposite one another accross the joint

Staggered Intermittent Fillet WeldsStaggered Intermittent Fillet Welds

Dimentions of staggered intermittent fillet welds shall Dimentions of staggered intermittent fillet welds shall
be specified on both sides of the reference line, and be specified on both sides of the reference line, and
the fillet weld symbols shall be offset on oposite sides the fillet weld symbols shall be offset on oposite sides
of the reference line.of the reference line.

The segments of staggered intermittent fillet welds The segments of staggered intermittent fillet welds
shall be symmetrically spaced on both sides of the shall be symmetrically spaced on both sides of the
joint. joint.

Extent of WeldingExtent of Welding

In the case of intermittent fillet welds, when In the case of intermittent fillet welds, when
additional weld lengths which are intended at the additional weld lengths which are intended at the
ends of the joint, these shall be specified by ends of the joint, these shall be specified by
seperate welding symbols and dimensioned on seperate welding symbols and dimensioned on
the drawing.the drawing.

Extent of WeldingExtent of Welding

When no weld lengths are intended at the ends When no weld lengths are intended at the ends
of the joint, the unwelded lengths should not of the joint, the unwelded lengths should not
exceed the clear distance between the weld exceed the clear distance between the weld
segments and be so dimensioned on the segments and be so dimensioned on the
drawing.drawing.

Location of Intermittent Fillet WeldsLocation of Intermittent Fillet Welds

When the location of intermittent welds is not obvious, When the location of intermittent welds is not obvious,
such as on a circular weld joint, it will be neccessary to such as on a circular weld joint, it will be neccessary to
provide specific segment locations by either dimension provide specific segment locations by either dimension
lines or by hatching.lines or by hatching.

Fillet welds in holes and slots shall be specified by the Fillet welds in holes and slots shall be specified by the
use of fillet weld symbols.use of fillet weld symbols.

Contours and Finishing of Fillet weldsContours and Finishing of Fillet welds

Contours to be obtained by welding: Fillet welds that Contours to be obtained by welding: Fillet welds that
are to be welded with approximately flat, convex or are to be welded with approximately flat, convex or
concaved faces without post weld finishing shall be concaved faces without post weld finishing shall be
specified by adding the flat, convex or concave specified by adding the flat, convex or concave
contour symbol to the welding symbol.contour symbol to the welding symbol.

Contours and Finishing of Fillet weldsContours and Finishing of Fillet welds

Contours to be obtained by postweld finishing: Fillet Contours to be obtained by postweld finishing: Fillet
welds that are to be finished with approximately flat, welds that are to be finished with approximately flat,
convex or concaved faces by postweld finishing shall convex or concaved faces by postweld finishing shall
be specified by adding both the appropriate contour be specified by adding both the appropriate contour
and finishing symbols to the welding symbol.and finishing symbols to the welding symbol.

Plug Welds: Arrow Side HolesPlug Welds: Arrow Side Holes

Holes in the arrow side member of a joint to be Holes in the arrow side member of a joint to be
plug welded shall be specified by placing the plug welded shall be specified by placing the
plug weld symbol below the reference line.plug weld symbol below the reference line.

Plug Welds: Other Side HolesPlug Welds: Other Side Holes

Holes in the other side member of a joint to Holes in the other side member of a joint to
be plug welded shall be specified by placing be plug welded shall be specified by placing
the plug weld symbol above the reference the plug weld symbol above the reference
line.line.

Plug Weld: DimensionsPlug Weld: Dimensions

Dimensions of plug welds shall be specified on the Dimensions of plug welds shall be specified on the
same side of the reference line as the weld symbol.same side of the reference line as the weld symbol.

The plug weld size shall be specified to the left of the The plug weld size shall be specified to the left of the
symbol and shall be preceded by the diameter symbolsymbol and shall be preceded by the diameter symbol

Plug weld size is the diameter of the hole at the faying Plug weld size is the diameter of the hole at the faying
surfacesurface

Plug Welds: Fillets in HolesPlug Welds: Fillets in Holes

The plug weld symbol shall not be used to The plug weld symbol shall not be used to
designate fillet welds in holes.designate fillet welds in holes.

Plug Welds: Angle of CountersinkPlug Welds: Angle of Countersink

The included angle of countersink for plug The included angle of countersink for plug
welds shall be located on the same side of the welds shall be located on the same side of the
reference line and above or below the plug weld reference line and above or below the plug weld
symbol as appropriate.symbol as appropriate.

Plug Welds: Depth of FillingPlug Welds: Depth of Filling

When the depth of filling is less than complete, it When the depth of filling is less than complete, it
shall be specified inside the plug weld symbol.shall be specified inside the plug weld symbol.

The omission of a depth dimension shall specify The omission of a depth dimension shall specify
complete filling.complete filling.

Plug Welds: SpacingPlug Welds: Spacing

The pitch (center to center distance) of plug The pitch (center to center distance) of plug
welds in a straight line shall be specified to the welds in a straight line shall be specified to the
right of the plug weld symbol.right of the plug weld symbol.

The spacing of plug welds in any configuration The spacing of plug welds in any configuration
other than a straight line shall be dimensioned other than a straight line shall be dimensioned
on the drawingon the drawing

Plug Welds: QuantityPlug Welds: Quantity

When a definite number of plug welds are desired in a When a definite number of plug welds are desired in a
joint, the number shall be specified in parentheses on joint, the number shall be specified in parentheses on
the same side of the reference line as the weld the same side of the reference line as the weld
symbol.symbol.

The number shall be either above or below the weld The number shall be either above or below the weld
symbol as appropriate symbol as appropriate

When the welding symbol also includes the angle of When the welding symbol also includes the angle of
countersink, the number of plug welds shall be placed countersink, the number of plug welds shall be placed
either above or below the angle of countersink as either above or below the angle of countersink as
appropriate appropriate

Plug Welds: Contours & FinishingPlug Welds: Contours & Finishing
Plug welds that are to be welded with Plug welds that are to be welded with
approximately flush or convex faces without approximately flush or convex faces without
post weld finishing shall be specified by adding post weld finishing shall be specified by adding
the flush or convex contour symbol to the the flush or convex contour symbol to the
welding symbol.welding symbol.

Plug welds that are to be finished with Plug welds that are to be finished with
approximately flush or convex faces by approximately flush or convex faces by
postweld finishing shall be specified by adding postweld finishing shall be specified by adding
both the appropriate contour and finishing both the appropriate contour and finishing
symbols to the welding symbol.symbols to the welding symbol.
Plug wleds that require a flat but not flush Plug wleds that require a flat but not flush
surface require an explanatory note in the tail of surface require an explanatory note in the tail of
the welding symbolthe welding symbol

Plug Welds: Multiple MembersPlug Welds: Multiple Members

Plug welding symbols may be used to specify Plug welding symbols may be used to specify
welding two or more members to another welding two or more members to another
member.member.

A section view of the joint shall be provided to A section view of the joint shall be provided to
clarify which members require preperation.clarify which members require preperation.

Slot Welds: Arrow Side SlotsSlot Welds: Arrow Side Slots

Slots in the arrow side member of a joint to be slot Slots in the arrow side member of a joint to be slot
welded shall be specified by placing the slot weld welded shall be specified by placing the slot weld
symbol below the reference line.symbol below the reference line.

Slot Welds: Arrow Side SlotsSlot Welds: Arrow Side Slots

Slots in the other side member of a joint to be slot Slots in the other side member of a joint to be slot
welded shall be specified by placing the slot weld welded shall be specified by placing the slot weld
symbol above the reference line.symbol above the reference line.

Slot Weld: DimensionsSlot Weld: Dimensions

Dimensions of slot welds Dimensions of slot welds
shall be specified on the shall be specified on the
same side of the reference same side of the reference
line as the weld symbol.line as the weld symbol.

The width of a slot weld The width of a slot weld
shall be specified to the shall be specified to the
left of the symbol left of the symbol

Slot weld width is the Slot weld width is the
dimension of the slot, dimension of the slot,
measured in the direction measured in the direction
of the minor axis, at the of the minor axis, at the
faying surfacefaying surface

Slot Weld: DimensionsSlot Weld: Dimensions

The length of slot welds shall be specified to the The length of slot welds shall be specified to the
right of the symbol right of the symbol

Slot weld length is the dimension of the slot, Slot weld length is the dimension of the slot,
measured in the direction of the major axis, at the measured in the direction of the major axis, at the
faying surfacefaying surface

Slot Welds: Fillets in SlotsSlot Welds: Fillets in Slots

The slot weld symbol shall not be used to The slot weld symbol shall not be used to
specify fillet welds in slots.specify fillet welds in slots.

Slot Welds: Angle of CountersinkSlot Welds: Angle of Countersink

The countersink included angle of slot welds The countersink included angle of slot welds
shall be specified on the same side of the shall be specified on the same side of the
reference line as the weld symbol and above or reference line as the weld symbol and above or
below the weld symbol as appropriate.below the weld symbol as appropriate.

Slot Welds: Depth of FillingSlot Welds: Depth of Filling

When the depth of filling is less than complete, When the depth of filling is less than complete,
it shall be specified inside the slot weld symbol.it shall be specified inside the slot weld symbol.

The omission of a depth dimension shall The omission of a depth dimension shall
specify complete filling.specify complete filling.

Slot Welds: SpacingSlot Welds: Spacing

The pitch (center to center distance) of slot welds in a The pitch (center to center distance) of slot welds in a
straight line shall be specified to the right of the length straight line shall be specified to the right of the length
dimension following a hyphen.dimension following a hyphen.

Slot Welds: QuantitySlot Welds: Quantity

When a definite number of slot When a definite number of slot
welds are desired in a joint, the welds are desired in a joint, the
number shall be specified in number shall be specified in
parentheses on the same side of parentheses on the same side of
the reference line as the weld the reference line as the weld
symbol.symbol.

The number shall be either above The number shall be either above
or below the weld symbol as or below the weld symbol as
appropriate appropriate

When the welding symbol also When the welding symbol also
includes the angle of countersink, includes the angle of countersink,
the number of slot welds shall be the number of slot welds shall be
placed either above or below the placed either above or below the
angle of countersink as angle of countersink as
appropriateappropriate

Slot Welds: Location & OrientationSlot Welds: Location & Orientation

The location and orientation of slot welds The location and orientation of slot welds
shall be specified on the drawing.shall be specified on the drawing.

Slot Welds: Contours & FinishingSlot Welds: Contours & Finishing

Slot welds that are to be welded with approximately Slot welds that are to be welded with approximately
flush or convex faces without post weld finishing shall flush or convex faces without post weld finishing shall
be specified by adding the flush or convex contour be specified by adding the flush or convex contour
symbol to the welding symbol.symbol to the welding symbol.

Slot welds that are to be finished with approximately Slot welds that are to be finished with approximately
flush or convex faces by postweld finishing shall be flush or convex faces by postweld finishing shall be
specified by adding both the appropriate contour and specified by adding both the appropriate contour and
finishing symbols to the welding symbol.finishing symbols to the welding symbol.

Slot welds that require a flat but not flush surface Slot welds that require a flat but not flush surface
require an explanatory note in the tail of the welding require an explanatory note in the tail of the welding
symbolsymbol

Spot Welds: Side SignificanceSpot Welds: Side Significance

The spot weld symbol, relative to its location on the The spot weld symbol, relative to its location on the
reference line may or may not have arrow side reference line may or may not have arrow side
member or other side member significancemember or other side member significance

For those welding processes for which arrow side For those welding processes for which arrow side
member significance is applicable, the arrow side member significance is applicable, the arrow side
member shall be indicated by placing the spot weld member shall be indicated by placing the spot weld
symbol below the reference line with the arrow symbol below the reference line with the arrow
pointing to this memberpointing to this member

Spot Welds: Side SignificanceSpot Welds: Side Significance

For those welding processes for which other side For those welding processes for which other side
member significance is applicable, the other side member significance is applicable, the other side
member shall be indicated by placing the spot weld member shall be indicated by placing the spot weld
symbol above the reference line with the arrow symbol above the reference line with the arrow
pointing to this memeberpointing to this memeber

Spot Welds: Side SignificanceSpot Welds: Side Significance

For those welding processes for which no arrow For those welding processes for which no arrow
side or other side significance is applicable, the side or other side significance is applicable, the
spot weld symbol shall be centered on the spot weld symbol shall be centered on the
reference linereference line

Spot Welds: DimensionsSpot Welds: Dimensions

Dimensions shall be specified on the same side of the Dimensions shall be specified on the same side of the
reference line as the spot weld symbol.reference line as the spot weld symbol.

Dimensions shall be shown on either side when the Dimensions shall be shown on either side when the
spot weld symbol has no arrow side or other side spot weld symbol has no arrow side or other side
significance.significance.

Spot Welds: DimensionsSpot Welds: Dimensions

Spot welds shall be specified by either size or Spot welds shall be specified by either size or
strength to the left of the spot weld symbol.strength to the left of the spot weld symbol.

The size of a spot weld shall be specified in The size of a spot weld shall be specified in
inches or millimeters, as the diameter of the inches or millimeters, as the diameter of the
weld at the faying surfacesweld at the faying surfaces

The shear strength of a spot weld shall be The shear strength of a spot weld shall be
specified in pounds or newtons.specified in pounds or newtons.

Spot Welds: Welding Process ReferenceSpot Welds: Welding Process Reference

The process reference shall be indicated in the The process reference shall be indicated in the
tail of the welding symbol.tail of the welding symbol.

Spot Welds: Projection WeldsSpot Welds: Projection Welds

The projection weld symbol shall be used with the The projection weld symbol shall be used with the
projection welding process referenced in the tail of the projection welding process referenced in the tail of the
welding symbol.welding symbol.

The projection weld The projection weld
symbol shall be placed symbol shall be placed
above or below (not above or below (not
centered on) the centered on) the
reference line to reference line to
designate which member designate which member
receives the embossment receives the embossment
in accordance with the in accordance with the
location conventions location conventions
given in 3.1.2given in 3.1.2

Spot Welds: SpacingSpot Welds: Spacing

The pitch (center to center distance) of spot The pitch (center to center distance) of spot
welds in a straight line shall be specified to the welds in a straight line shall be specified to the
right of the weld symbol.right of the weld symbol.

Spot Welds: QuantitySpot Welds: Quantity

When a definite number of spot welds are desired in a When a definite number of spot welds are desired in a
joint, the number shall be specified in parentheses on joint, the number shall be specified in parentheses on
the same side of the reference line as the spot weld the same side of the reference line as the spot weld
symbol.symbol.

The number may be either above or below the weld The number may be either above or below the weld
symbol when there is no other side member symbol when there is no other side member
significance and the symbol is centered on the significance and the symbol is centered on the
reference line.reference line.

Spot Welds: GroupingSpot Welds: Grouping

A group of spot welds may be located on a A group of spot welds may be located on a
drawing by intersecting centerlines.drawing by intersecting centerlines.

The arrow shall point to at least one of the The arrow shall point to at least one of the
centerlines passing through each weld location.centerlines passing through each weld location.

Spot Welds: GroupingSpot Welds: Grouping

When spot welds are to be randomly located in When spot welds are to be randomly located in
a group, the area in which they are to be a group, the area in which they are to be
applied shall be clearly indicated.applied shall be clearly indicated.

Spot Welds: Extent of WeldingSpot Welds: Extent of Welding

When spot welds extend less than the distance When spot welds extend less than the distance
between abrupt changes in the direction of between abrupt changes in the direction of
welding, or less than the full length of the joint, welding, or less than the full length of the joint,
the desired extent shall be dimensioned on the the desired extent shall be dimensioned on the
drawing.drawing.

Spot Welds: Contours & FinishingSpot Welds: Contours & Finishing

When the exposed surface of either member in a spot When the exposed surface of either member in a spot
welded joint is to be welded with approximately flush or welded joint is to be welded with approximately flush or
convex face without post weld finishing, that surface convex face without post weld finishing, that surface
shall be specified by adding the flush or convex shall be specified by adding the flush or convex
contour symbol to the welding symbol.contour symbol to the welding symbol.

Spot welds whose faces are to be finished Spot welds whose faces are to be finished
approximately flush or convex faces by postweld approximately flush or convex faces by postweld
finishing, shall be specified by adding both the finishing, shall be specified by adding both the
appropriate contour and finishing symbols to the appropriate contour and finishing symbols to the
welding symbol.welding symbol.

Spot welds that require a flat but not flush surface Spot welds that require a flat but not flush surface
require an explanatory note in the tail of the welding require an explanatory note in the tail of the welding
symbolsymbol

Spot Welds: Multiple MembersSpot Welds: Multiple Members

When one or more members are to be included When one or more members are to be included
between the two outer members in a spot weld between the two outer members in a spot weld
the spot weld symbol for the two outer the spot weld symbol for the two outer
members shall be used. members shall be used.