Detonating Cord Re-closure Letter
Document type: Guide
Categories: Guide

Re-Closure of Specification Boxes for Packaged Explosives and Detonators
Detonating Cord

DYNO NOBEL INC.
Dyno Nobel Americas
January 2023 6440 S. Millrock Dr.
 Suite 150
 Salt Lake City, Utah
 84121 USA
 Telephone: 801-364-4800
 Fax: 801-328-6452
 www.dynonobel.com

Re-Closure of Specification Boxes
 for Packaged Explosives and Detonators
 Detonating Cord
Explosive products are packaged in UN specification packages (boxes) meeting U.S. Department of
Transportation (DOT) shipping requirements. Whenever a UN specification box is opened, and one or
more units of explosives are removed for any purpose, a void is created, compromising the performance
of the specification box as originally tested.

Detonating Cord packages opened in the field are required to be closed and sealed for transport over a
public road just as they were closed and sealed from the factory. Open the top of the box only.

Consumers who purchase Dyno Nobel products, use less than full-box quantities, then transport partial
 UN specification boxes of explosives and/or detonators assume the responsibility to meet this DOT re-
 closure requirement, per49 CFR Part178.2 (c).

Federal Mandatory Training Requirements for Packaging:

DOT Federal Mandatory Training Requirements for Packaging related tasks in accordance with 49 CFR
172.704 must be complied with as follows.

The DOT regulates hazardous materials (explosives) for safe transportation over public roads. To ensure
these hazardous materials in their original packages can be safely transported, the DOT requires that
anyone that performs a “function-specific” task associated with erecting a package, packaging product into
a container, closing and sealing a container of hazardous materials, and offing a package of hazardous
materials for shipment be Trained, Tested, and Certified that each one of these people know exactly what is
to be done correctly.

This Function-Specific training must be done within 90 days of employment and every three years after.
Records must be kept inclusive of the preceding three years, for as long as that employee is employed as a
hazmat employee and for 90 days thereafter.

Detonating Cord Re-Closure Packaging Instructions:

To Close Box with Flaps: Boxes with flaps require the minor (inner) flaps to be closed first and the major

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Re-Closure of Specification Boxes for Packaged Explosives and Detonators
Detonating Cord

(outer) flaps to be closed last. These boxes have tape sealing the box from the factory. The tape required to
seal the box is 2-inch-wide 3M 373 or 3M 355. It should be applied over the original factory tape centered
on the major flaps and extending a minimum of 2 inches down the sides of the box.

If a spool has been removed from the box, it is required that dunnage be used to fill the void created in the
box from the spool removed to prevent freedom of movement of the remaining spool(s) in the box before
the box is closed and sealed. Appropriate dunnage would be paper, corrugated fiberboard, anti-static
bubble wrap, or an empty spool.

Any inner packaging inside the box (any cord remaining must be on a spool) from the factory must remain in
the box to maintain the hazard class and/or packaging requirements of the material.

Always Never
 Ensure box is properly marked and labeled in Package with any other product other than what was
 accordance with Hazardous Materials Regulations originally contained
 Package with more than the unit count and total net
 Double-count the number of units repackaged prior to
 explosives weight originally packaged and sealed at the
 re-closing
 time of manufacturing
 Mark the new package count legibly and visibly on the Cover any part of the Hazardous Material packaging
 specification box content label label
 Use appropriate and sufficient dunnage materials Use a damaged, wet, punctured or cut box

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