3
VRBS
3.3 Hints for the welding
The welding should only be carried out according to
DIN EN ISO 9606-1 or AWS Standards by an autho-
rized and certified welder.
Verification of the used weld-on material must be
checked with the supplier of the welding electrodes.
HINT
The
pre-heating temperature
for the welding
of the VRBS 31,5 t and 50 t must be between
150°C and 170°C.
1. Weld on welding block 1.
HINTS
• The described welding sequences
must be observed compulsive.
• Weld all seams at the same tempe-
rature.
• Keep the area of gap for escape of
water clear.
• The distance lugs assist in achieving
the correct root weld (approx. 3 mm =
0.1 inch). They may not be removed.
• Never weld at the quentched and tem-
pered ring!
• Remove any welding mistakes and dirt
at the root weld before applying the
cover weld seams.
• Avoid end craters.
Begin at starting point S* and weld the root and
cover
weld seams (Pic. 1
).
Append fillet weld (measurement „a“) acc.
Table 2.
Choose type of weld seam and size according to
Pic. 6
and
Table 2
.
S*
Pic. 1: Weld on welding block 1
2. Insert the pink powder coated lifting ring into the
welded-on welding block 1.
3. Attach welding block 2 as tight as possible to the
ring, in order to still guarantee moveability of ring.
Pic. 2: Align ring and check mobility
4. Tack weld-on block 2 in the area of the distance
lugs (only fasten provisionally).
Pic. 3: Attachment in the area of the distance lugs.
5. Check function of the ring. The ring must be able
to pivot 180°. If necessary please correct.
6. Weld on the welding block 2 according to steps 1
and 2.
Pic. 4: Weld on welding block 2
7. Please check by a competent person after welding
the ongoing usage of the weld-on lifting point (see
chapter
4 Inspection / Repair / Disposal
).
