BS 499-2C-1999 Welding terms and symbols - European arc welding symbols in chart form《焊接术语与符号 图表形式的的欧洲电弧焊符号》.pdf

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1、NOTE 1 All drawings where these symbols are used are to be reference d BS EN 22553 (ISO 2553:1992). 1. ELEMENTARY SYMBOLS 2. SUPPLEMENTARY SYMBOLS Type of weld Illustration Symbol Shape of weld surface or weld Supplementary symbol Butt weld between plates with raised edges which J are melted down l

2、) completely Flat (usually finished flush by grinding or machining) -10 Square butt weld ) II Convex r Concave -J Single-V butt weld M I V Toes shall be blended smoothly - may require dressing G22 Single-bevel butt weld 1 f V Permanent backing strip used IMl J2 Single-U butt weld l y Removable backi

3、ng strip used IMRI G22 Single-J butt weld f-“ Examples of the use of supplementary symbols Designation Illustration Symbol Backing run 7 Double-V butt weld “ “/ , X , I , /.,: Flat (flush) single-V butt weld with permanent backing strip M I V l.MJ Flat (flush) single-V butt weld with flat (flush) ba

4、cking run Double-bevel butt weld “. /-K U !( J “ -t II I - -Convex double-V weld Double-U bl,tt weld ( J ( X “If 1-;: :) rJ r-. X R,: I /“ o.J t - Fillet weld Concave fillet weld ( f ( I Plug weld 1 :-D l n (plug or slot weld - USA) : Filled weld with toes smoothly blended Surfacing rm:nlnll) rY I )

5、 ) 5. EXAMPLES SHOWING THE USE OF SYMBOLS Description III ustration Symbol Description Illustration Symbol Single V-butt Single V-butt weld weld with ,-, r -permanent ,-, 100- backing strip _VTIIT - -I I I . I Single V-butt Single bevel weld with T -butt weld with backing run r-reinforcing fillets r

6、-0- b. b. -V IV I V-II V-l . -I I I I I I European Arc Wedng Symbos Based on BS EN 22553 Welded brazed and soldered joints Symbolic representation on drawings 3. REFERENCE LINES AND OTHER INFORMATION Method of representation , The arrow may be used to indicate a welded Reference line r Welding symbo

7、l join on an elevation or cross section (continuous) Arrow line Identification line (dashed line) , Location of welding symbol on reference line It is recommended that the arrow line is placed on the side of joint to be welded unless there is not enough space It is recommended that the welding symbo

8、l is placed on the reference line but this is not mandatory “ A V - JL (1 -=-“ y V 7f -V , Special rules for butt welds For symmetrical welds the identification line (dashed) is omitted For single J and bevel butt welds, the arrow points to the prepared edge V , 1/ ! / / , J “, “- /“ l ( I “-Other i

9、nformation Welding all round I r;:. t ! t 1 f,:+ Symbol for welding I all round -; .-t ._j_. ,-j-i llS I I I I Site welding Welding process Specific instructions 111 / A1 e.g. 111 = MMA. 131 = MIG e.g. procedure sheet A.1 (in accordance with BS EN 24063) , Description Illustration Symbol Description

10、 Illustration Symbol Double bevel Cruciform joint T -butt weld with , fillet welded on reinforcing fillets r- r-three sides - r- b. b. 1-r-v v f. /Jt / p I V I I I I lY LJ I I I I “-, 1. V v Partial Cruciform joint penetration fillet welded on T-butt weld r- r-opposite sides r- (6 mm ;-V-penetration

11、 61/ 61/ both sides) /j /61 161-, I I , I I D lJ-v I I I I -6 I-V -BS 499-2c: 1999 NOTE 2 For old drawings produced in accordance with BS 499-2 the corresponding chart BS 499-2C should be used. 4. WELD DIMENSIONS Butt welds 5 = minimum specified throat (penetration) thickness. If no dimension is sho

12、wn, the weld is full penetration 56 V 56 / / 53 l / ) -=t ( ) jl ( t M 2 ) r f ! Fillet welds a = throat thickness z = leg length , a7 “ z5“, V, V r- ( I IS ) ) ) Deep penetration fillet welds The throat thickness is designated bys and the dimensions are given for example s8a6 “ I I I I “ “ ( “-“V.

13、-z , Weld length For continuous welds the length of weld is given to the right of the welding symbol For intermittent welds, I = weld length, e = distance between welds, n = number of welds aorz “-nxl (el aorz / nxl (e) l I e I .-1 “) z6 10x100 (150) V z6 V 10x100 (150) I e.g. 10 staggered welds per side, leg length 6 mm, 100 mm long and 150 mm apart British Standards Institution .BSI House 389 Chiswick High Road London W4 4AL Telephone 020 8996 9000 Fax 020 8996 7400