[Code of Federal Regulations]
[Title 49, Volume 2]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR173.58]

[Page 449-450]
 
                        TITLE 49--TRANSPORTATION
 
 CHAPTER I--RESEARCH AND SPECIAL PROGRAMS 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, 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;

[[Page 450]]

    (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)).
    (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 Secs. 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]