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En 25817

The document defines quality levels - D, C, and B - for different types of weld imperfections according to standard EN 25817. It lists 15 types of imperfections including lack of penetration, bad fit-up, undercut, excessive convexity, and excessive asymmetry. For each imperfection and quality level, it provides maximum allowed sizes. For example, for lack of penetration at level D, short imperfections must be less than 0.2s or 1.5mm maximum, and long imperfections are not permitted.

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2K views1 page

En 25817

The document defines quality levels - D, C, and B - for different types of weld imperfections according to standard EN 25817. It lists 15 types of imperfections including lack of penetration, bad fit-up, undercut, excessive convexity, and excessive asymmetry. For each imperfection and quality level, it provides maximum allowed sizes. For example, for lack of penetration at level D, short imperfections must be less than 0.2s or 1.5mm maximum, and long imperfections are not permitted.

Uploaded by

Ramanujadaasan
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Imperfection Quality level for weld imperfections (EN 25817)

designation D C B
Moderate Intermediate Stringent
9. Short imperfections Short imperfections Not permitted
Lack of h≤0,2s h≤0,1s
max 1,5mm
penetration Long imperfections Long imperfections
(incomplete Not permitted Not permitted
penetration) h s

10. h≤1mm + 0,3a h≤0,5mm + 0,2a h≤0,5mm + 0,1a


Bad fit-up max 4mm max 3mm max 2mm

11. h≤1,5mm h≤1,0mm h≤0,5mm


Undercut

13. h≤1mm + 0,25b h≤1mm + 0,15b h≤1mm + 0,1b


Excessive max 5mm max 4mm max 3mm
b
convexity

14. h≤1mm + 0,3a h≤1mm + 0,2a h≤1mm + 0,15a


Fillet weld having max 5mm max 4mm max 3mm
a throat thickness
greater than the h
nominal value
a

15. Short imperfections Short imperfections Not permitted


Fillet weld having h≤0,3mm + 0,1a h≤0,3mm + 0,1a
max 2mm max 1mm
a throat thickness
smaller than the h Long imperfections Long imperfections
nominal value Not permitted Not permitted

20. h≤2mm + 0,2a h≤2mm + 0,15a h≤1,5mm + 0,15a


Excessive
h
asymmetry
Z2

a
Z1

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