Unit 14 - Welding Symbols

arrow

connects the reference line of a welding symbol to one side of the joint to be welded

tail

contains notes pertaining to the process, filler metal, and any related standards needed to establish specific weld requirements

other side

opposite side of the arrow side

non-preferred weld symbols

replaced by new symbols, not found on newer prints

weld-all-around symbol

signifies the weld is to be made completely around the joint without interruption

The weld ___ is placed on the left side of the weld symbol.

size

finish symbol

symbol included with the contour symbol is the weld is to be finished

contour symbol

symbol used with the weld symbol when the finished shape of the weld is important

joint penetration

the distance the weld metal extends from the weld face into a joint, not ncluding weld reinforcement

bent leader (broken leader)

used for bevel and J-groove welds arrow head points to the particular section to be prepared, either by machining, flame cutting, air carbon gouging, or other process

reference line

"backbone"; required central elements of welding symbol. always horizontal

8 possible elements of a welding smybol

1. reference line 2. weld symbol 3. arrow 4. tail 5. supplementary symbols 6. dimensions 7. finish symbols 8. notations pertaining to the process, filler metal, and any related standard

a weld symbol ____ the reference line signifies the weld should be on the other side

above

lower side of the reference line is called the ___

arrow side

a weld symbol ____ the reference line signifies the weld should be on the arrow side

below

weld symbol

depicts the cross-sectional shape of the weld or joint

welding symbol

graphic assembly of the elements needed to fully specify weld requirements

supplementary symbols

included with basic weld symbols to provide more specific weld data not provided by other elements in the welding symbol

backing weld symbol

indicates a bead type backing weld of the opposite side of the regular weld

field weld symbol

indicates the weld is not done where the unit is initially made

melt-through symbol

indicates where 100% joint or member penetration is required in welds made from one side

notation

information called out in the tail of a welding symbol; abbreviations or notes

The weld ___ is placed on the right side of the weld symbol.

length

back weld

made after the required weld indicated b y the symbol iis complete assures full weld material through the joint