Welding symbols on drawings - .:YUSUF MANSUROGLU - P

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Length of butt/groove welds When there is no indication of the length of a butt/groove weld, it means that the whole length of the joint is to be welded. Sometimes the weld is shorter than the joint length and may consist of intermittent welds. In this case the specific lengths of welds and their location may be indicated by dimensions on the right of the weld symbol and on the drawing. Hatching may also be used to depict graphically the welds shown in Fig. 9.7. This procedure and alternative methods are described in detail in AWS A2.4-98, but not in ISO 2553 which does not include intermittent butt welds. However, the ISO standard does include intermittent fillet welds, described in Section 11, and there is no reason why the principle should not be applied to butt welds symbolised in accordance with the ISO standard. ( ) 1 4 AWS Illustration 3 4 6 ( ) 3 6 1 4 9.7 Intermittent square groove welds with dimensions and hatching (AWS) (dimensions are in inches). 1 4 Dimensions 1 27
10 Dimensions 2 Fillet welds – transverse The ISO standard includes two methods to indicate fillet weld sizes: leg length (z) and throat thickness (a) (see Fig. 10.1). 28 <strong>Welding</strong> <strong>symbols</strong> on drawings Leg length 10.1 Fillet weld size (ISO). In the AWS standard the size of a fillet weld always refers to the leg length, the dimension of which is placed to the left of the weld symbol. In contrast to the symbol for a groove weld, the fillet weld size is not placed in brackets. In the ISO system, to indicate the size of a fillet weld, the dimension is placed to the left of the symbol, preceded by the letter z or a, depending on whether the leg length or throat thickness is to be specified (see Fig. 10.2). It is generally the leg length that is specified. Illustration ISO AWS 10.2 Fillet weld with 6 mm (1/4 in) leg length. The terms describing fillet weld dimensions, actual throat thickness and design throat thickness, are shown in Fig. 10.3 and are defined in the section Terms and definitions. Actual throat thickness z Throat a thickness z6 Design throat thickness 10.3 Actual throat thickness and design throat thickness of fillet welds. 1 4
Page 2 and 3: Welding sy
Page 4 and 5: Welding sy
Page 6 and 7: Contents Introduction vii Scope ix
Page 8 and 9: Introduction Symbols for indicating
Page 10 and 11: Scope This book is an updated versi
Page 12 and 13: Terms and definitions Some terms an
Page 14: ponent shape or by the use of a pro
Page 17 and 18: Figure 1.1(b) shows a single fillet
Page 19 and 20: In the ISO system a weld on the arr
Page 21 and 22: 3 Welding
Page 23 and 24: terms and symbols
Page 25 and 26: (a) (b) (c) (d) (e) (f) 10
Page 27 and 28: (a) (b) (c) (d) 12 Welding<
Page 29 and 30: 7 Location of symbols</stro
Page 31 and 32: 8 Supplementary symbols</st
Page 33 and 34: If the weld is to be finished by an
Page 35 and 36: Other supplementary symbols
Page 37 and 38: Peripheral welds (weld all round) F
Page 39 and 40: 9 Dimensions 1 Butt/groove welds In
Page 41: Double butt/groove welds often have
Page 45 and 46: Unequal leg length fillet welds If
Page 47 and 48: Intermittent fillet welds are used
Page 49 and 50: 12 Spot and seam welds Resistance s
Page 51 and 52: Seam welds The notation for the siz
Page 53 and 54: of studs to the right. The number o
Page 55 and 56: 15 Process identification In the IS
Page 57 and 58: 16 Non-destructive testing
Page 59 and 60: 17 Exercises On the following pages
Page 61 and 62: Exercise 3:Tank Figure 17.3 shows a
Page 63 and 64: Exercise 1 solution ISO AWS ISO A1
Page 65 and 66: Sketches �F , �G and �H show
Page 67 and 68: of whether it is to be achieved in
Page 69 and 70: dure would be to attach the channel

Welding symbols on drawings - .:YUSUF MANSUROGLU - P

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