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Welding Symbols (ISO 2553) and Weld Joint Design.

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Presentation on theme: "Welding Symbols (ISO 2553) and Weld Joint Design."— Presentation transcript:

1 Welding Symbols (ISO 2553) and Weld Joint Design

2 ELEMENTARY WELD SYMBOLS Square Groove Weld Single V Groove Weld

3 ELEMENTARY WELD SYMBOLS Single Bevel Groove Weld Single V Groove Weld with Broad Root Face

4 ELEMENTARY WELD SYMBOLS Single Bevel Groove Weld with Broad Root Face Single U Groove Weld

5 ELEMENTARY WELD SYMBOLS Single J Groove Weld Backing Weld

6 ELEMENTARY WELD SYMBOLS Fillet Weld Plug / Slot Weld

7 ELEMENTARY WELD SYMBOLS Spot Weld Seam Weld

8 ELEMENTARY WELD SYMBOLS Edge Weld Surfacing

9 SUPPLEMENTARY SYMBOLS Flat ConvexConcave Weld Profile

10 SUPPLEMENTARY SYMBOLS Toes blended smoothly Permanent Backing Strip M Removable Backing Strip MR

11 SUPPLEMENTARY SYMBOLS Peripheral Welds

12 SUPPLEMENTARY SYMBOLS Site welds

13 SUPPLEMENTARY SYMBOLS Tail Optional) Sequence of Information in the Tail Process (as per ISO 4063) Acceptance Level (as per ISO 5817 or ISO 10042) Working Position (as per ISO 6947) Filler Materials (as per ISO 544 or ISO 2560 or ISO 3581)

14 EXAMPLES OF APPLICATION Method of representation Weld Joint Arrow Line Reference Line (Continuous) Reference Line (Dashed)

15 EXAMPLES OF APPLICATION Welding on the Arrow Side Arrow Side Other Side

16 EXAMPLES OF APPLICATION Welding on the Other Side Arrow Side Other Side

17 EXAMPLES OF APPLICATION Welding on the Other Side Other Side Arrow Side

18 EXAMPLES OF APPLICATION Welding on the Arrow Side Other Side Arrow Side

19 EXAMPLES OF APPLICATION Which is the Other Side in this case? Side A Side C Side B Side D

20 EXAMPLES OF APPLICATION Welding on both Sides Other Side Arrow Side

21 EXAMPLES OF APPLICATION Symmetric Welding on both Sides

22 EXAMPLES OF APPLICATION Pointing of Arrows for Bevel and J Joints OR

23 EXAMPLES OF APPLICATION Pointing of Arrows for Bevel and J Joints

24 DIMENSIONING OF WELDS Butt Joints l sl s

25 DIMENSIONING OF WELDS Fillet Welds z5 l 5 5 a5 l 5

26 DIMENSIONING OF WELDS Fillet Welds aaa

27 DIMENSIONING OF WELDS Intermittent Fillet Welds l (e) l zn x l (e) z

28 DIMENSIONING OF WELDS Staggered Intermittent Fillet Welds zn x l (e) z l (e) l l l

29 DIMENSIONING OF WELDS Spot Weld dn (e) d ee

30 DIMENSIONING OF WELDS Seam Weld dn x l (e) d le

31 DIMENSIONING OF WELDS Plug Weld dn (e) d ee

32 DIMENSIONING OF WELDS Slot Weld dn x l (e) d l e

33 WELD JOINT DESIGN

34 Edge Preparation - Need Poor penetration Poor strength Good penetration Good strength (100% joint efficiency)

35 Edge Preparation Factors which influence choice of edge preparation - Thickness - Material - Welding process - Extent of penetration required - Welding distortion - Cost

36 Basic Joint Types butt tee lap corner edge

37 Basic Weld Types Groove welds Fillet weld Plug / slot weld Spot / seam weld

38 Applicable Welds for Butt joint Square Groove weldV Groove weld U Groove weld Bevel Groove weld J Groove weld

39 Applicable Welds for Butt joint Double V Groove weld Double U Groove weld Double Bevel Groove weld Double J Groove weld

40 Applicable Welds for Tee joint

41 Applicable Welds for Lap joint Plug / slot weld Spot / seam weld Fillet weld

42 Applicable Welds for Corner Joint

43 Applicable Welds for Edge Joint Edge weld

44 Butt joint Square Groove weld Root gap

45 Butt joint Single V Groove weld Groove angle  Root face Root gap

46 Weld Reinforcement Correct reinforcement Minimum cost Good joint strength Excess reinforcement High cost Poor joint strength Under reinforcement Poor joint strength

47 Butt joint – Complete Joint penetration Weld from face side Back gouging Back weld

48 Butt joint – Complete Joint penetration Backing weld Back gouging

49 Butt joint – Complete Joint penetration (welding from one side) TIG / SMAW welding Consumable guide

50 Butt Joint – Double V groove Less weld metal Less distortion Higher edge preparation cost Better for thickness > 20 mm More weld metal More distortion Lower edge preparation cost Better for thickness < 20 mm Double V groove Single V groove

51 Butt Joint – U groove Good access at the root Less weld metal Higher edge preparation cost Better for thickness > 40 mm Groove angle Root face Root gap Root radius

52 Butt Joint – Bevel groove Double bevel groove Single bevel groove Bevel angle 40 to 50° Difficult to approach the root Weld defects Back gouging to remove root defects Good weld quality

53 Butt Joint – J groove Good access at the root Back gouging and back welding to get good weld quality Less weld metal Higher edge preparation cost Better for thickness > 40 mm

54 Tee Joint – Full strength joint leg throat throat = 0.707 x leg leg = 1.414 x throat In a full strength joint, leg = 0.75 x thickness

55 Tee Joint – Full penetration joint leg = throat 45° or 60°

56 Tee Joint Theoretical throat Actual throat AWS D 1.1 recommendation when gap > 1.6 mm – to increase leg size of fillet by the amount of gap

57 Lap Joint AWS D 1.1 recommendation Overlap = 5 x thickness (1 inch minimum) Gap between mating faces = 1.6 mm max overlap

58 Welding Position – Groove 1 G 2 G 3 G 4 G

59 Welding Position – Groove 1 G2 G 5 G6 G 45°

60 Welding Position – Fillet 1F 2F 3F 4F

61 Welding Position – Fillet 1F 2F 5F

62 Welding Positions – Groove PositionInclination of axis Rotation of face Flat0° to 15°150° to 210° Horizontal 0° to 15°80° to 150° 210° to 280° Overhead0° to 80°0° to 80° 280° to 360° Vertical15° to 80°80° to 280° 80° to 90°0° to 360°

63 Welding Positions – Fillet PositionInclination of axis Rotation of face Flat0° to 15°150° to 210° Horizontal0° to 15°125° to 150° 210° to 235° Overhead0° to 80°0° to 125° 235° to 360° Vertical15° to 80°125° to 235° 80° to 90°0° to 360°


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