welding details

Welding Details

Welding Process of bonding metal pieces together Work or metal pieces are melted along a

common edge or surface and their molten metal allowed to form a puddle or pool liquid metal

The pieces are fused when the puddle solidifies

Welding Process 3 major

– Gas welding– Electric arc welding– Resistance or spot welding

Gas Welding Uses a flame of an extremely high

temperature that literally melts the metal Also known as oxyacetylene

– oxygen– acetylene

Electric Arc Welding Commonly called Arc Welding Heat of electric arc used to fuse or cut

metal

Resistance (Spot) Welding Metals held tightly

together under pressure and subjected to electric current through the point of pressure

Electric current causes metals to heat up and fuse together

Types of Joints in Welding

1--BUTT

2--CORNER

3--TEE

4--LAP

5--EDGE

Commonly Used Types of Welds

fillet plug or slot spot seam groove

– square– V– Bevel– U– J

Basic Welding Symbols

Welding Symbol Practice Symbol placement for Fillet Weld

Special Welding Symbols Weld All Around

Weld All Around would be used to to secure a pipe column to a plate

Field Weld is welding done at the job site

Field Weld

Welds with Length and Spacing

SpacingLength

Size of Weld

General Weld Callout

Fillet Weld Callout Example Weld arrow side

Drawing Callout Actual Weld

Size of Weld--NO larger than the maximum material thickness of the metals being joined

Fillet Weld Callout Example Weld other side

Drawing Callout Actual Weld

Fillet Weld Callout Example weld both side

Drawing Callout Actual Weld

Groove Weld Symbol Callout

V-grooved weld1/4” root opening45° groove angle

Bevel weld1/4” root openingarrow side

Weld Finishes A welded surface to be finished to a greater degree

than just the structural weld a straight line or a convex arc is added to the weld symbol

Types of finished surface– M - machining– C - chipping– G - grinding

Assignment Review and coordinate the following

consultant sheets into the contract documents – they must match the floor plans, sections, and elevations.– Sheets P-1, P-2, P-3, M-1, M-2, E-1, E-2, & E-3

Welded Detail Drawing

Scale: your choice, as large as possible for “A” sheet

TS = True size of part 3/8” bevel weld at side

joints and 3/8” fillet weld at base plate/side joints of beam brackets

Profile sectioned items Cutting Planes are

assumed