Quantcast Electric

 

Click here to make tpub.com your Home Page

Page Title: Electric
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Figure 5-26. Dual electric priming system
Up
TM-9-1300-277 Demilitarization/Disposal of Conventional Munitions Manual
Next
PREVENTION OF ELECTRIC MISFIRES
TM 9-1300-277
WARNING
b. Electric.
A MISFIRE WILL BE APPROACHED
BY THE PERSON IN CHARGE, OR
NOTE
WHO HAS THE MOST KNOWLEDGE
When preparing and using an
OF THE FIRING SYSTEM INVOLVED.
electric ignition train, all applicable
A SECOND PERSON WILL ACT AS A
safety precautions in paragraph 5-7
SAFETY BACKUP.
will be observed.
A misfire may occur in spite of all precautions.
Squibs and firing wiring will be
.
Therefore, working on or near a misfire is the most
tested prior to preparation of the
hazardous of all disposal operations.  One qualified
ignition train; squibs in the same
person will examine the misfire with a second qualified
manner as electric blasting caps in
person acting as a safety backup. The safety backup
paragraph  5-8b;  firing  wire  in
will stay clear of the immediate danger area. He will
accordance with paragraph 5-8c.
utilize natural barriers or obstructions for protection, but
remain in a position to observe the actions of the person
(1) Attach M1 flash-vented squib lead
examining the misfire. He will be prepared to go to the
wire to firing wire.
aid of the person examining the misfire if an accident
should occur.
(2) Secure bag to squib by taping top of
bag to squib lead wires.
5-25. PREVENTION OF NONELECTRIC MISFIRES
All safety precautions will be followed In
(3) Insert bag into combustible material
addition, the probability of a misfire may be reduced if
in pit.
the following procedures are adhered to:
(4) Attach  firing  wire  to  blasting
a. Prepare all initiators properly, ensuring use of
machine and operate in accordance with paragraph 5-
proper blasting cap.
11.
b. Place charges carefully.
5-24. MISFIRES
WARNING
c. Place initiator properly.
WAIT AT LEAST 30 MINUTES AFTER
EXPECTED
DETONATION
OR
d. Perform any tamping operation with care to
IGNITION BEFORE APPROACHING
avoid damage to an otherwise carefully prepared
ANY  MISFIRE.
IF  IT  CAN  BE
charge.
POSITIVELY  ASCERTAINED  THAT
THE
FAILURE
IS
STRICTLY
e. Ensure time blasting fuse is ignited prior to
ELECTRICAL IN NATURE, AND IT IS
withdrawing.
POSITIVELY  KNOWN  THAT  THE
EXPLOSIVES ARE NOT BURNING,
f. Fire charge according to proper technique.
CORRECTIVE  ACTION  MAY  BE
TAKEN IMMEDIATELY.
g. If possible, a dual firing system will be used. If
both initiators are properly assembled, the possibility of
NOTE
a misfire is reduced to a minimum.
The above warning applies to all
nonelectric firing systems, all dual
5-26. HANDLING NONELECTRIC MISFIRES
systems (figs. 5-23, 5-24, 5-25, and 5-
26), and to detonating cord primed
Nonelectric misfires will be handled as follows:
with nonelectric blasting caps.  An
exception is made only for single
a. Nonelectric Blasting Cap Misfire.
electrical firing systems (one firing
circuit) and single detonating cord
firing  systems  primed  with  an
(1) Allow a minimum of 30 minutes after
electric blasting cap.
expected detonation before starting investigation.
Change 2
5-22

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business