Page 18 - Failure Analysis Case Studies II

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2.4
2.4
2.4
2.4
2.4
2.4
2.4
E
s 3.4
cu
N
3.4
3.4
4.2
4.2
i rn Dia. 5.0
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5.7
5.7
5.7
Fig. 3. Schematic drawing of the silo, showing the location of the rupture: (I) level theoretically necessary for
bursting by hydrostatic pressure; (11) level for filling with 407 t; (111) permissible filling for density of 1.05 kg I-';
(IV) level after bursting.

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I

Fig. 4. Longitudinal bolted joint, presumably at location of start of rupture

Table 1. Specimens and samples taken
A One sheet/plate with a failed circumferential bolted connection
B One plate containing an intact circumferential joint
C One plate containing an intact longitudinal joint
D Samples of slurry on site
E Samples of slurry retained at the manufacturer of the slurry
F Textile fibres from an airbag at the top of the silo
G Two safety valves from the top of the silo
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