Dimensions i n m

These d i r e c t i o n e have been prepnred on t h e b a e i s of general experience and they conta in dimensions f o r edge forme which i n genera l provide t h e most en t i s fno to ry condi t ions f o r welding. The dimonsion ranges ind ica t ed r ep resen t l i m i t e f o r design and n o t t o l e r - antes f o r f a b r i c a t i o n purpoees. They apply t o the welding, f p m one a i a e Oxily, of b u t t jointei i n s t e e l tubes l they may a l s o be appl ied a s appropr ia te t o s i m i l a r kinds of work. The edge forme s p e c i f i e d hnvo been derived from the general edge forma nccording to . DIN 8551. These d i r e c t i o n s apply t o completely through-welded crosa-seotions sub jec t t o the following condi t ions :

Rate~i&t unalloyed and a l loyed s t e o l , inoluding a u s t e n i t i c e t e e l .

WElOi~f5-~r!?cEsee!?i Arc welding with roa e lec t rodes (E), gas welding (G), gas-ehielded aro welding (60).

FilZer-ietali aacording t o D I N 19?3 Shoet 1, DIN 8554 Sheet 1, DIN 8556 Sheet 1 (Pre- l i m i n a r ~ Standard) D I N 8575 Sheet 1 and o the r s which a r e eu i t ed t o the ma te r i a l e and welding processes spegi f ied .

Zioishl Welding from one eide by hand.

WelOin6-F!ooitionsl al1 (w, h , S , f , q , U according tcr DIN 1912 Sheet 1 welding in a f i x e d pos i t i on (without r o t a t i n g p ipas

Eesisn~2lon~ Designation of an edge form wi th i d e n t i f i c a t i o n number 21:

E&? form 21 D I N 2559

Copyright by the DIN DEiJTSCHES lNSTlTUT FUR NORMUNG E.U. (DIN ENGLISH) Tue Jan 30 13:YB:SZ 1996

-- - --

' D I N 2 5 5 9 * P T * L 73 1 2751i111b 0009797 0 ; : ~ ' z

- -- - - - - - - - - -- - - -1 --

l . DIN 2559 Sheet 1 Page 3

Explanationa

Thie r ev i a ion takee acoount of changes r e a u l t i n g from t h e development which has taken plaor oompared with t he J u l y 1962x i saue .

I n t h e d iacusaions oare vae taken t o enaure t h a t t he propoaed edge forme bave geuera l va l id i ty . Por t h i e reaeon edge form va r i a t i one intended only f o r e p e c i f i o processee uere dieregarded. I n view of t he oompre-

'heneivs ecope eought i n t h i e way i t has only been poseib le t o spec i fy numerical valuee f o r included nn81r, gap, gap depth and f l a n k depth wi th in v ide l imi t a . Wherr i t appears neoesaary Por a ' speci f ic app l i ca t ion t o do eo , opeoinl worke s tandarde ahould be drawn up giv ing t h e des igner d e t a i l e d p a r t i c u l e r a whi le t '

observing the d i r e o t i o n s l a i d down i n t h i s Standard.

'Pbe des igna t ion of t he rdge forma should provide the i n fo rna t ion u i thau t any p o e s i b i l i t g o! e r r o r . tShere neceesarg, the des ignat ion may be augmented by f u r t h e r apec i f io d e t a i l a r e l a t i n g , e.g., t o t h s inc luded angle.

Thr edge form v i t h t h e i d e n t i f i o a t i o n number 22 hao been adoptad i n reoponae t o a suggeation from the pipe oonet ruot ion induet ry i n order t o inc lude a typs of rdge form i n oommon une f o r welded jo in t a to meet exaot ing q u a l i t y requirements.

DI1 2559 Sheet 2 ( a t preaont st i l l o i r c u l a t i n g a s d r a f t ) oonta ins edge forma f o r c i r cumfe ren t i a l wolde wi th s p s c i f i e d to l e r anc re f o r p l an t oontrac t demeroation purpoaes, and f o r eec t iona l cons t ruc t ion involv- i n g f e r r i t i o e t e e l tubes.

Copyright by the DIN DDJTSCHB INSTITUT FUR NORNUNC E U. (DIN FNCLISH) Tue Jan 30 13:'i8:52 1996