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Welding Drawing
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WELDING DRAWINGS
WELD TERMINOLOGY
Weld terminology
LegFaceThroatGroove radiusRoot opening (groove weld) is the space between the pieces before welding*Root faceGroove angle
WELDING DRAWINGS
WELD TERMINOLOGY
WELDING DRAWINGS
WELD TERMINOLOGY
WELDING DRAWINGS
WELD TERMINOLOGY
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
FILLET
WELDING DRAWINGSWELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
SQUARE
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
BEVELGROOVE
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
V-GROOVE
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
J-GROOVE
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
U-GROOVE
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
FLARE- BEVEL
GROOVE
WELDING DRAWINGS
FILLET AND GROOVE WELDS
SINGLE DOUBLE
FLARE-V GROOVE
Location of weld symbol wrt joint*
Welds on the arrow side of the joint are shown by placing the weld symbol below the reference lineWelds on the other side of the joint are shown by placing the weld symbol above the reference lineWelds on both sides of the joint are shown by placing the weld symbol on both sides of the reference line
WELDING DRAWINGS
WELD TERMINOLOGY
Field welds & All around welds
Field welds*
Not made in the shop or at the place of initial constructionSmall black flag symbol* is placed above and at right angles to the reference line
All around welds
Weld extending completely around a joint is indicated by a weld-all-around symbol placed at the intersection of the reference line and the arrowNot required for welds extending around the circumference of a pipe
Last slide on weld symbols
Multiple reference lines indicate a sequence of operations to be done at a single location*
Tail of welding symbol* Welding process Omitted when no
references are required
WELDING DRAWINGS
COMBINED WELDING SYMBOLS
Design of welded joints
The size of the weld should always be designed with reference to the size of the thinner memberFillets welds are cheaper and easier to apply than groove
Full-strength fillet welds joining 2 different thicknesses of material should be sized using a table of recommended full strength weld sizes based on the thinner plate*
WELDING DRAWINGS
FINISHING OF WELDS
18-3 Fillet Welds & weld symbol (WS)
Dimensions of fillet welds are shown on the same side of the reference line as the WS & to the leftSpecify dimensions of fillet welds on both sides of a jointVertical part of fillet weld symbol always on left*
If using a general note giving fillet weld dimensions, dimensions may be left off WSIf dimensions differ from general note show them on WSLength of weld shown to right of WS
More on fillet welds…
Staggered intermittent fillet welds are designated in the weld symbol by staggering where the weld symbol appears on the reference line (p.724*)
Size of fillet welds
A practical method to size fillet welds is to design the weld for the thinner plate, making it sufficient to carry 1/3 to ½ the carrying capacity of the plate.
WELDING DRAWINGS
COMPARISON OF A CAST SHAFT SUPPORT WITH A WELDED STEEL SHAFT SUPPORT
18-4 Groove Weld symbolDimensions of groove weld are shown on the same side of the reference line as the welding symbolWhen both sides of a double-groove weld have the same (or different) dimension, both sides are dimensioned, however the root opening needs to appear only onceWhen a general note governs dimensions of groove welds, groove welds need not be dimensioned on the weld symbol
Back and Backing welds
Back or backing weld symbols are used to indicate bead-type back or backing welds of singe-groove weldsThe back weld is made after the groove weldThe backing weld is made before the groove weld
WELDING DRAWINGS
APPLICATION OF BACK AND BACKING WELD SYMBOLS
18-5 Other basic welds
PlugSlotSpotSeamSurfaceFlangedStud
WELDING DRAWINGS
OTHER BASIC WELDING SYMBOLS AND THEIR LOCATION SIGNIFICANCE