07-wis5 symbols 2007

TWICSWIP 3.1WIS 5

WELDING INSPECTION

WELDING SYMBOLS BSEN ISO 22553 /AWS A2.

SECTION 8SECTION 8

One method of transferring information from the design office to the workshop could be:

This method does not give enough information and does not convey the actual or design requirements.Most countries have their own standards for symbols.

The two most common are BS EN 22553 (ISO 2553), which has now replaced BS 499 Part 2 & AWS A2.4

Please Please weld weld herehere

Weld symbols on drawings

Welded joints may be indicated:Welded joints may be indicated:

- - by detailed sketches, showing every dimensionby detailed sketches, showing every dimension

or by symbolic representationor by symbolic representation


Advantages of symbolic representation:


Disadvantages of symbolic representation:

• simple and accurate• should not over-complicate the drawing• no need for additional views• should give all necessary information regarding the

specific joint to be obtained

• can only be used only for standard joints• requires training for properly understanding of

symbols

WELDING SYMBOLS

BS EN ISO 22553.BS EN ISO 22553.Welded,brazed and soldered Welded,brazed and soldered

joints - joints -

Symbolic representation on Symbolic representation on drawings.drawings.

WELDING SYMBOLS

BSEN 22553 (UK & Europe)

There are 7 components to this standard;

1. THE ARROW LINE1. THE ARROW LINE

2. THE DUAL REFERENCE LINE2. THE DUAL REFERENCE LINE

3. THE ELEMENTARY SYMBOL3. THE ELEMENTARY SYMBOL

5. THE SUPPLEMENTARY SYMBOL5. THE SUPPLEMENTARY SYMBOL

6. DIMENSIONS6. DIMENSIONS

7. COMPLEMENTARY INDICATIONS7. COMPLEMENTARY INDICATIONS

4. COMBINED SYMBOLS FOR SYMMETRICAL 4. COMBINED SYMBOLS FOR SYMMETRICAL WELDSWELDS

Convention of the arrow line:Convention of the arrow line:

ARROW LINE

a) a) ShallShall touch the joint intersection touch the joint intersection

b)b) ShallShall not be parallel to the drawing not be parallel to the drawing

c)c) ShallShall point towards a single plate point towards a single plate preparation (when only one plate has preparation (when only one plate has preparation)preparation)

ARROW SIDEARROW SIDEOTHER OTHER SIDESIDE

Convention of the reference Convention of the reference line:line:

oorr

THE DUAL REFERENCE LINE

a) a) ShallShall touch the arrow line touch the arrow line

b)b) ShallShall be parallel to the bottom of the be parallel to the bottom of the drawingdrawing

c)c) There shallThere shall be a further broken line be a further broken line above or beneath the reference line , above or beneath the reference line , identification line. (Not necessary where identification line. (Not necessary where the weld is symmetrical!)the weld is symmetrical!)

BS EN 22553 - example

Other sideOther side

Arrow sideArrow side


Other side joint AOther side joint A

Arrow side joint AArrow side joint AJoint AJoint A

Joint BJoint B

Arrow side joint BArrow side joint B Other side joint BOther side joint B


Other side joint BOther side joint B

Arrow side joint AArrow side joint AJoint AJoint A

Joint BJoint BArrow side joint BArrow side joint B

Other side joint AOther side joint A

TABLE 1-ELEMENTARY SYMBOLS

Various categories of joints are characterised by an elementary symbol.

The elementary symbol is similar to the shape of the weld to be made.

Square butt weld

Weld typeWeld type SketchSketch SymbolSymbol

Single V butt weld

TABLE 1 - ELEMENTARY SYMBOLS

Single-V butt weld with broad root face

Weld type Sketch Symbol

Single bevel butt weld

Single bevel butt weld with broad root face

Backing run


Single-U

butt weld


Single-J

butt weld

Fillet weld

Surfacing


Edge weld


Fillet Fillet weldweld

Double Double VV

Double Double bevelbevel

Double UDouble U Double JDouble J

Representation of welds done from both sides of the joint intersection, touched by the arrow head

TABLE 2 - COMBINED SYMBOLS FOR SYMMETRICAL WELDS

SYMMETRICAL WELDSSYMMETRICAL WELDS

Supplementary weld Supplementary weld symbols;symbols;

Ground Ground flushflush

TABLE 3 - SUPPLEMENTARY SYMBOLS.

OROR

ConvexConvex

Supplementary weld Supplementary weld symbols; symbols;

TABLE 3 -SUPPLEMENTARY SYMBOLS

ConcaveConcave

Supplementary weld Supplementary weld symbols;symbols;Toes shall be blended smoothlyToes shall be blended smoothly

SUPPLEMENTARY SUPPLEMENTARY SYMBOLS

Supplementary weld Supplementary weld symbols;symbols;

TABLE 3 - SUPPLEMENTARY SYMBOLS

MRMR

Removable Removable backing backing strip usedstrip used

Permanent Permanent backing backing strip usedstrip used

MM

METHOD OF REPRESENTATION

ARROW LINEARROW LINE

REFERENCE LINEREFERENCE LINE

IDENTIFICATION LINEIDENTIFICATION LINE

WELD SYMBOLWELD SYMBOL

BS EN 22553 rules - example



Dimensions;

Leg length prefixed by the letter z.

Design throat thickness prefixed by the letter a.

DIMENSIONS

z6z6

a4.2a4.2

55

z 8 z 8 a5a5

88

Fillet weld dimensions according BS EN Fillet weld dimensions according BS EN 2255322553

oror

88

z 8z 8oror

z 8z 8

a 5 z 8a 5 z 8

Fillet welds

88

88

Dimensions;

For intermittent fillet welds

DIMENSIONS

Number of welds (n) x Length of weld (l)Number of welds (n) x Length of weld (l)

( Distance between each weld (e))( Distance between each weld (e))

z1z100

3 x 25 ( 50 )

z 10z 10 3 x 25 3 x 25 (50)(50)

1010

2525

5050


Dimensions;

For deep penetration fillet welds.

DIMENSIONS

s8s8

s = Effective throat s = Effective throat thicknessthickness

Dimensions;

For single vee butt welds with a broad root face (partial penetration welds).

DIMENSIONS

s6s6

s = nominal throat s = nominal throat thicknessthickness

610

PARTIAL PENETRATION WELDS

6

44

s6s6

44

INTERMITTENT FILLET WELDS

Chain intermittent fillet weld

length (l)length (l)Distance between Distance between (e)(e) aa

zz

aa n×l(en×l(e))aa n×l(en×l(e))

zz n×l(en×l(e))zz n×l(en×l(e)) ororSymbol to BS EN 22553

STAGGERED INTERMITTENT

Staggered intermittent fillet weld

length length (l)(l)

Distance(e)Distance(e) aa

zz

aa n×l n×l (e)(e)aa n×l n×l (e)(e)

zz n×l n×l (e)(e)zz n×l n×l (e)(e) oror

Symbol to BS EN 22553

COMPLEMENTARY INDICATIONS

Weld all round ( peripheral weld )Weld all round ( peripheral weld )

Site (Field) WeldSite (Field) Weld



111111

Indication of welding process to Indication of welding process to ISO 4063;ISO 4063;

MMA-MMA-111.111.

MIG-131.MIG-131. MAG-MAG-135.135.

TIG-141TIG-141FCAW-FCAW-136136


Indication of welding procedure

WPSWPS


Non Destructive Testing - other than visual

NDTNDT

Welds Arrow Side of joint, Symbol on the Solid reference line. Welds on Other Side of the joint, Symbol on the Dashed identification line.

Symbols with a Vertical Line component must be drawn with the vertical line to the Left side of the symbol

All CSA dimensions are shown to the Left of the symbol

All Linear dimensions are shown on the Right of the symbol i.e. number of welds, length of welds and distance between welds

BS EN 22553 rulesBS EN 22553 rules

The dashed line must be omitted when symmetrical welds are required

Fillet welds that are intermittent and staggered Fillet welds that are intermittent and staggered are shown by an are shown by an Elongated ZElongated Z symbol through symbol through the dual reference line.the dual reference line.

BS EN 22553 rulesBS EN 22553 rules

WELD SYMBOLS

QUESTIONS ?

BS EN 22553 FILLET WELDS

ANSWERS TO EXERCISESANSWERS TO EXERCISES

1 z6



2 z6z6

3x25 (40)3x25 (40)

2525 4040

25254040


ANSWERS TO EXERCISES.

3 z6

z10

3x50 (25)

3x40 (30)

50 25

40 30 40 30 40

2550 50



4 z8

z10

3x25 (50)

2x20 (40)

20

25 50 25 50 25

2040

BS EN 22553 BUTT WELDS

ANSWERS TO EXERCISES

1 M



2



3s10



4

z8

s12

z12

Welds “on arrow side” of joint go underneath the reference line while welds “the other side” of the joint, go on top of the reference line

Symbols with a vertical line component must be drawn with the vertical line to the left side of the symbol

All CSA dimensions are shown to the left of the symbol

All linear dimensions are shown on the right of the symbol i.e. number of welds, length of welds, length of any spaces

AWS A 2.4 RULES

•Welds onWelds on arrow sidearrow side of joint symbolof joint symbol belowbelow the the reference line.reference line.

•welds onwelds on other sideother side of the joint, symbolof the joint, symbol aboveabove the reference line.the reference line.

AWS A 2.4 SUMMARY

Arrow Arrow SideSide

Other Other SideSide

•Use of 3 reference lines to show sequence of operations.

AWS A 2.4 SUMMARY

1

2

UT

3

•Staggered intermittent fillet welds are indicated by the symbol about the reference line.

AWS A 2.4 SUMMARY

•Fillet weld distances are measured center to center

AWS A 2.4 SUMMARY

•Definite break in the arrow line when only one side is prepared.

AWS A 2.4 SUMMARY

•Dimensions may be shown in imperial measurement.

AWS A 2.4 SUMMARY

3/4”

or

0.75"

NDT PRACTICLE.

QUESTIONS ?QUESTIONS ?

WELD SYMBOLS

QUESTIONS ?

Convention of the reference line AWS Convention of the reference line AWS A 2.4 A 2.4

Reference line

a) a) ShallShall touch the arrow line touch the arrow line

b) b) ShallShall be parallel to the bottom of the be parallel to the bottom of the drawingdrawing

10 3 x 50 (70)

AWS A 2.4 rules-example

10

50

70

8888

55

5 x 85 x 8

88

Fillet weld dimensions according AWS A 2.4

Fillet weldsFillet welds

5 leg on 5 leg on vertical vertical membermember

Intermittent fillet welds

Chain intermittent fillet weld

length (l)

pitch (e)

zz

zz l - el - ezz l - el - e

Symbol to AWS A2.4

Intermittent fillet welds

Staggered intermittent fillet weld

length length (l)(l)

pitch pitch (e)(e)

zz

zz l - el - ezz l - el - e

Symbol to AWS A2.4

e/2e/2

Example:Example:

Draw the symbols for the weld given as shown below to the specification BS EN 22553

Weld drawingWeld drawing

Symbol Symbol DrawingDrawing

111111


MMMMAA

Solution BS EN Solution BS EN 2255322553 z z

1010s 30s 30

s 20s 20 z z 1010

a 7 z a 7 z 1010s 35s 35

s 15s 15z 10z 10

Weld symbols on drawingsWeld symbols on drawings

135/111135/111

Note that the arrow Note that the arrow lines are not drawn lines are not drawn correctly in the notes correctly in the notes on page 8.7on page 8.7

Partial penetration single-V buttPartial penetration single-V butt‘‘S’ indicates the depth of penetrationS’ indicates the depth of penetration

1015

BS EN 22553 Welding Symbols

1013

s10

Solution AWS Solution AWS A2.4A2.4 1010

3030

20201010

1010

3535

15151010


10

20

30303535

1515

7

Student symbols exerciseStudent symbols exercise

Complete a symbols drawing for the welded joint given below to AWS A2.4 & BS EN 22553

All fillet weld leg lengths are 10 mmAll fillet weld leg lengths are 10 mm


07-wis5 symbols 2007

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