8.4 Welding and cutting of steel elements (p. I)
Information regarding welding is given in annex B.
8.4.1 Welding and cutting of sheet piles and the preparation of primary elements for combined walls shall comply with the quality specified in the design.
8.4.2 Edge preparation and cutting of the steel elements shall be carried out in such a manner that embrittlement due to flame cutting does not have a significant adverse effect on the quality of the joint. The dimensional tolerances of EN 29692:1994, or in figure 7j shall be complied with. The prepared piles shall be in accordance with EN 10248-2:1995, EN 10249-2:1995 and EN 10219-2:1997.
8.4.3 Unless specified otherwise, joint preparation, welding processes and the description or the qualification of the welding procedure shall be in accordance with table 1.
For tubular primary elements it shall be ensured that the distance between the connector and a longitudinal seam of the element is > 300 mm and that the circular and spiral seams on the elements are levelled at the position of the connector.
| Welding | Testing and inspection of welds | ||||||||
| Type of welded assembly | Type of joint | Type of weld | Joint preparation | Allowable welding processes | Description/qualification of welding procedure | Quality level according to EN 25817:1992 | Type of testing | Extent of testing [%] |
|
| BS(EN 10248- 1:1995) 2) S235 JRC,S275 JRC, S355 JOC according to EN 10249-1:1997 and grades according to EN 10219-1:1997 3) |
QS(EN 10248- 1:1995) 4) and grades given in EN 10219- 1:1997 according to 5) |
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| Lengthened piles – straight web pile – bending resistant pile |
butt joint 1) (see fig. 7.a) / lap joint (see fig. 7.b.) butt joint 1) (see fig. 7.c.) / lap joint (see fig. 7.d.) |
EN 29692:1994 EN 29692:1994 |
EN 29692:1994 EN 29692:1994 |
6) 6) |
-- --7) |
EN 288-2:1992 + A1:1997 EN 288-2:1992 + A1:1997 7) |
D D 8) |
visual visual 9) |
100 100 9) |
| Strengthened piles | lap joint (see fig. 7.e.) |
EN 29692:1994 | EN 29692:1994 |
6) | -- | -- | D | visual | 100 |
| Junctions/junction piles – all, except straight web junction piles – straight web junction piles |
(oblique) T-joint (see fig. 7.f.+7.g) / corner joint (see fig. 7.h.) / lap joint (+ butt joint) (see fig. 7.i) (oblique) T-joint (see fig. 7.j) |
EN 29692:1994 half V-weld/ double half V-weld |
EN 29692:1994 according to figure 7.j |
6) 6) |
--7) EN 288-3:1992 + A1:1997 |
EN 288- 2:1992 + A1: 1997 7) EN 288-3:1992 + A1: 1997 |
D 8) D 8) |
visual 9) US + visual |
50 9) 10 (US) 10) +100(visual) |
| Box piles – contiguous interlock – connected interlock – others |
butt joint (see figure 7.k) lap joint (see figure 7.l) T-joint (see figure 7.m) / lap joint (see figure 7.n) |
butt weld between curved elements EN 29692:1994 EN 29692:1994 |
-- -- EN 29692:1994 |
6) 6) 6) |
-- -- -- |
EN 288-2:1992 + A1:1997 EN 288-2:1992 + A1:1997 EN 288-2:1992 + A1:1997 |
D D D |
visual visual visual |
100 100 100 |
| Welded interlocks (fixing, sealing) |
butt joint (see figure 7.o) | butt weld between curved elements | -- | 6) | -- | EN 288-2:1992 + AV.1997 | D | visual | 100 |
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1) for different thicknesses, the shape of the butted ends shall be in accordance with the design specifications 2) BS = Base Steel according to 5.1.1 of EN 10020:1988 3) Steel grades according to tables A.1, B.1 and B.2, except S420xxx and S460xxx 4) QS = Quality Steel according to 5.1.2 of EN 10020:1988 5) Steel grades S420xxx and S460xxx 6) All processes described in 111, 114, 121, 122, 131, 135 and 136 of EN 24063:1992, are permitted 7) in the case of acceptance class C, EN 288-3:1992 + A1:1997 shall be applied 8) acceptance class C if requested by the design 9) in the case of acceptance class C, one X-ray test according to ISO 1106-1:1984 on 10% of the sheet piles or primary elements and 100% visual inspection or US tests on 10% of the sheet piles or primary elements over the whole length of the weld and 100% visual inspection 10) 10 % of the sheet piles or primary elements over the whole length of the weld |
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