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
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.
It is not clear in thse tests that there is perforation of the plate.
ReplyDeleteI 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
For Series 6 Type A and B, the plates do not need to be perforated.
ReplyDeleteFor 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.