Standard Guide for Conducting Stacking Tests on UN Packagings Using Guided or Unguided Loads

Importancia y uso:

4.1 This guide is intended to provide a standardized method and a set of basic instructions for performing stack testing on UN packaging designs using either guided or unguided top loads. This guide provides the suggested minimum information that should be documented when conducting stacking test and provides information for recommended equipment.

4.2 All packaging design types other than bags must be subjected to a stacking test. Packagings subject to the stacking test must be capable of withstanding a superimposed top load of a specified minimum mass for a specified period of time without failure as these parameters are defined in the regulations. The test is not intended to determine the absolute top load capability of a packaging.

Note 1: When quantification of box compression strength is desired for determining stacking strength or for design purposes use Test Method D642 and conditioning as recommended in 4.5.

4.3 Design qualification testing procedures are intended, as explicitly stated in the HMR, to be the minimum performance capability levels for packaging manufactured to transport Hazardous Materials under conditions normally incident to transportation.

4.4 The HMR tests are designed to be gross package capability evaluations that can be performed in a similar manner in all parts of the world, but under circumstances with some variance in test facility capabilities. This is an intentional feature of the test designs and protocols. The focus of HMR testing is not the determination of quantifiable, comparison data to allow for analytical evaluation.

4.5 It is recommended that facilities performing the HMR tests consult the guidance on conditioning in the relevant ASTM documents for any particular packaging material as applicable. The following conditioning documents, Practices D4332 and D685, are commonly used.

Subcomité:

D10.22

Referida por:

D4919-23

Volúmen:

15.10

Número ICS:

55.180.10 (General purpose containers)

Palabras clave:

49 CFR; dangerous goods; design qualification; dynamic compression test; guided load; hazardous materials; periodic retest; stack; stacking; unguided load;