[Code of Federal Regulations]

[Title 49, Volume 2]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR173.57]



[Page 468-469]

 

                        TITLE 49--TRANSPORTATION

 

   CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, 

                      DEPARTMENT OF TRANSPORTATION

 

PART 173_SHIPPERS_GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS

--Table of Contents

 

     Subpart C_Definitions, Classification and Packaging for Class 1

 

Sec. 173.57  Acceptance criteria for new explosives.



    (a) Unless otherwise excepted, an explosive substance must be 

subjected to the Drop Weight Impact Sensitivity Test (Test Method 

3(a)(i)), the Friction Sensitivity Test (Test Method 3(b)(iii)), the 

Thermal Stability Test (Test Method 3(c)) at 75 [deg]C (167 [deg]F) and 

the Small-Scale Burning Test (Test Method 3(d)(i)), each as described in 

the Explosive Test Manual (UN Manual of Tests and Criteria) (IBR, see 

Sec. 171.7 of this subchapter). A substance is forbidden for 

transportation if any one of the following occurs:



[[Page 469]]



    (1) For a liquid, failure to pass the test criteria when tested in 

the Drop Weight Impact Sensitivity Test apparatus for liquids;

    (2) For a solid, failure to pass the test criteria when tested in 

the Drop Weight Impact Sensitivity Test apparatus for solids;

    (3) The substance has a friction sensitiveness equal to or greater 

than that of dry pentaerythrite tetranitrate (PETN) when tested in the 

Friction Sensitivity Test;

    (4) The substance fails to pass the test criteria specified in the 

Thermal Stability Test at 75 [deg]C (167 [deg]F); or

    (5) Explosion occurs when tested in the Small-Scale Burning Test.

    (b) An explosive article, packaged or unpackaged, or a packaged 

explosive substance must be subjected to the Thermal Stability Test for 

Articles and Packaged Articles (Test method 4(a)(i)) and the Twelve 

Meter Drop Test (Test Method 4(b)(ii)), when appropriate, in the 

Explosive Test Manual. An article or packaged substance is forbidden for 

transportation if evidence of thermal instability or excessive impact 

sensitivity is found in those tests according to the criteria and 

methods of assessing results prescribed therein.

    (c) Dynamite (explosive, blasting, type A) is forbidden for 

transportation if any of the following occurs:

    (1) It does not have uniformly mixed with the absorbent material a 

satisfactory antacid in a quantity sufficient to have the acid 

neutralizing power of an amount of magnesium carbonate equal to one 

percent of the nitroglycerin or other liquid explosive ingredient;

    (2) During the centrifuge test (Test Method D-2, in appendix D to 

this part) or the compression test (Test Method D-3 in appendix D to 

this part), a non-gelatin dynamite loses more than 3 percent by weight 

of the liquid explosive or a gelatin dynamite loses more than 10 percent 

by weight of the liquid explosive; or

    (3) During the leakage test (Test Method D-1 in appendix D to this 

part), there is any loss of liquid.



[Amdt. 173-224, 55 FR 52617 Dec. 21, 1990, as amended at 58 FR 51532, 

Oct. 1, 1993; 64 FR 51918, Sept. 27, 1999; 68 FR 75743, Dec. 31, 2003]