Monday, November 17, 2008

Vulcan 12" Shell of Shell - UN 6b test

This is a UN classification 6a test that was done recently. Finding - 1.1G

2 comments:

Antonicus said...

It is not clear in thse tests that there is perforation of the plate.

I cannot see any holes.

Under the UN Manual of Tests and Criteria detonation giving it a 1.1 rating requires there to be perforation or fragmentation of the steel witness plate.

Also the sequential explosions indicate that a detonation wave was not propagated.

Anthony Lealand
Firework Professionals Ltd
New Zealand

Cindy said...

For Series 6 Type A and B, the plates do not need to be perforated.

For Type A, a mass explosion indicates a Division 1.1 finding. Evidence includes:

a. A crater at the test site,
b. Damge to the witness plate beneath the package
c. Measurement of a blast
d. Disruption and scattering of the confining material.

For Type B, a mass explosion indicates a Division 1.1 finding. Evidence includes:

a. A crater at the test site larger than that given by a single package
b. Damge to the witness plate beneath the stack which is appreciably greater than that from a single package
c. Measurement of a blast which significantly exceeds that from a single package
d. Violent disruption and scattering of most of the confining material.

You may be thinking of the Type C test, where if there are any perforations to the 3 witness screens erected in each three quadrants 4m from the packages, the finding will be Division 1.2.