Tuesday, July 20, 2010

Shocktube Troubleshooting

Factory Faults

Poor insertion of tubing into detonator at crimping


Missing components on unit (No cobra clip & no heat seal)


Detonator double crimped at base charge (Safety hazard)


Unidirectional propagation resulting in misfire


Tube burst due to a too high core load


No or low core load failure


Failure to Propagate (HMX/Aluminum ratio)


Detonator not clipped in top position


Detonator clipped on one side of skirt only


Tube damaged in plant


Will most likely burst in use due to weak points along the length of the tube.

Detonator not clipped in properly


Detonator not clipped into 2nd position properly and pulled back.

Damage to Shocktube in use
DAMAGED TUBING (Rough handling)


CLOSE CONNECTING – No RunUp

At least half a meter run-up must be allowed for shock tube

CLOSE CONNECTION

(No run-up allowed) At least half a metre run-up from the donor detonator to acceptor must be allowed for shock tube)

Shrapnel embedded into tubing


Shrapnel damage


Broken Clips

Broken clips resulting from lines being too tight.

Physical Damage

Example of tube strangulation due to physical damage