[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: 49CFR173.58]



[Page 469-470]

 

                        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. 173.58  Assignment of class and division for new explosives.



    (a) Division 1.1, 1.2, 1.3, and 1.4 explosives. In addition to the 

test prescribed in Sec. 173.57 of this subchapter, a substance or 

article in these divisions must be subjected to Test Methods 6(a), 6(b), 

and 6(c), as described in the UN Manual of Tests and Criteria (IBR, see 

Sec. 171.7 of this subchapter), for assignment to an appropriate 

division. The criteria for assignment of class and division are as 

follows:

    (1) Division 1.1 if the major hazard is mass explosion;

    (2) Division 1.2 if the major hazard is dangerous projections;

    (3) Division 1.3 if the major hazard is radiant heat or violent 

burning, or both, but there is no blast or projection hazard;

    (4) Division 1.4 if there is a small hazard with no mass explosion 

and no projection of fragments of appreciable size or range;

    (5) Division 1.4 Compatibility Group S (1.4S) if the hazardous 

effects are confined within the package or the blast and projection 

effects do not significantly hinder emergency response efforts; or

    (6) Not in the explosive class if the substance or article does not 

have significant explosive hazard or if the effects of explosion are 

completely confined within the article.

    (b) Division 1.5 explosive. Except for ANFO, a substance that has 

been examined in accordance with the provisions Sec. 173.57(a) of this 

subchapter, must be subjected to the following additional tests: Cap 

Sensitivity Test, Princess Incendiary Spark Test, DDT Test, and External 

Fire Test, each as described in the Explosive Test Manual. A material 

may not be classed as a Division 1.5 explosive if any of the following 

occurs:

    (1) Detonation occurs in the Cap Sensitivity Test (Test Method 

5(a));

    (2) Detonation occurs in the DDT Test (Test Method 5(b)(ii));

    (3) An explosion, evidenced by a loud noise and projection of 

fragments, occurs in the External Fire Test (Test Method 5(c), or

    (4) Ignition or explosion occurs in the Princess Incendiary Spark 

Test (Test Method 5(d)).



[[Page 470]]



    (c) Division 1.6 explosive. (1) In order to be classed as a 1.6 

explosive, an article must pass all of the following tests, as 

prescribed in the Explosive Test Manual:

    (i) The 1.6 Article External Fire Test;

    (ii) The 1.6 Article Slow Cook-off Test;

    (iii) The 1.6 Article Propagation Test; and

    (iv) The 1.6 Article Bullet Impact Test.

    (2) A substance intended for use as the explosive load in an article 

of Division 1.6 must be an extremely insensitive detonating substance 

(EIDS). In order to determine if a substance is an EIDS, it must be 

subjected to the tests in paragraphs (c)(2)(i) through (c)(2)(x) of this 

section, which are described in the Explosive Test Manual. The substance 

must be tested in the form (i.e., composition, granulation, density, 

etc.) in which it is to be used in the article. A substance is not an 

EIDS if it fails any of the following tests:

    (i) The Drop Weight Impact Sensitivity Test;

    (ii) The Friction Sensitivity Test;

    (iii) The Thermal Sensitivity Test at 75 [deg]C (167 [deg]F);

    (iv) The Small Scale Burning Test;

    (v) The EIDS Cap Test;

    (vi) The EIDS Gap Test;

    (vii) The Susan Test;

    (viii) The EIDS Bullet Impact Test;

    (ix) The EIDS External Fire Test; and

    (x) The EIDS Slow Cook-off Test.

    (d) The Associate Administrator may waive or modify certain test(s) 

identified in Sec. Sec. 173.57 and 173.58 of this subchapter, or 

require additional testing, if appropriate. In addition, the Associate 

Administrator may limit the quantity of explosive in a device.

    (e) Each explosive is assigned a compatibility group letter by the 

Associate Administrator based on the criteria prescribed in Sec. 

173.52(b) of this subchapter.



[Amdt. 173-224, 55 FR 52617 Dec. 21, 1990, as amended at 56 FR 66267, 

Dec. 20, 1991; 63 FR 52849, Oct. 1, 1998; 66 FR 45379, Aug. 28, 2001; 68 

FR 75743, Dec. 31, 2003]