Home xin Which test methods are specified in the national standard general technical conditions for transport packaging of dangerous goods (GB 12463-2009)?

Which test methods are specified in the national standard general technical conditions for transport packaging of dangerous goods (GB 12463-2009)?

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the national standard general technical conditions for transport packaging of dangerous goods (GB 12463-2009) specifies four test methods for dangerous goods packaging: stacking test, drop test, air tightness test and hydraulic test

1. Stacking test

stacking test is generally suitable for barrel packaging and box packaging. The number of samples is 3. The test method is: apply the total weight of the same goods on the sample, which is equivalent to the stacking height of 3M (generally, the stacking height is 3M, and the stacking height by sea is 8m), and keep it for 24h. The plastic package to be filled with liquid shall be able to withstand the stacking test for 28 days under the condition of ≥ 40 ℃. After the test, if the package is not seriously broken, the container contained therein is not broken or leaked, and the package itself is not reduced in strength or any deformation causing unstable accumulation, it is qualified

2. Drop test

the target of the drop test shall be a hard, inelastic, flat and horizontal surface. During the test, it shall be flat and the center of gravity shall be perpendicular to the impact point. The quantity and dropping direction of samples have different requirements according to different packaging types. See table 3-10 for details

Table 3-10 number and orientation of drop test of dangerous goods packaging

the drop height of drop test varies according to the state of the articles to be loaded, and liquid articles have different requirements according to the relative density of the articles. See table 3-11

Table 3-11 height of drop test (unit: m)

note: ① D is the relative density of the substance to be installed

② the drop height shall be calculated according to the nearest distance between the lowest point of the suspended package and the impact surface

if the contents of a package (such as plastic bag) are still intact through the test, even if the barrel cover is no longer leak proof, the package shall be regarded as qualified; For the package containing liquid, when the internal and external pressure reaches balance, the package is qualified if there is no leakage; For bag packaging, the test is qualified only if the outer layer and outer packaging are not seriously broken and the contents are not lost

3. Air tightness test

air tightness test is only applicable to iron barrel, aluminum barrel, plastic barrel and wooden Pipa barrel. The number of samples requires that each barrel be tested. The test shall be conducted before the first use and before reuse after repair. The test method is to immerse the tested package in water (the immersion method cannot affect the test effect), and fill the package with air pressure; The pressure standard reached shall not be less than the requirements in table 3-12. It is qualified if there is no air leakage after the test

Table 3-12 air pressure standard for air tightness test of dangerous goods packaging

4 Hydraulic test

hydraulic test is generally applicable to iron (steel) barrels (cans), aluminum barrels, plastic barrels and wooden Pipa barrels. The number of samples is generally 3. The method is to pressurize the tested package continuously and evenly and keep it stable throughout the test. The package shall not be mechanically supported. If the method of mechanical support packaging is adopted, the test effect shall not be affected. Considering the maximum temperature that may be encountered during storage or transportation, the required test pressure shall not be less than the total gauge pressure at 55 ℃. (vapor pressure filled with substance plus inert gas pressure) multiplied by a safety factor of 1.5. The total gauge pressure shall be determined based on the maximum filling when the solid substance is filled to 95% of its volume, the liquid substance is filled to 98% of its volume and the filling temperature is 15 ℃. However, the packaging test pressure of class I packaging materials (class I dangerous goods) shall not be less than 250kPa; The test pressure for the packaging of class II and III packaging substances (class II and III dangerous goods) shall not be less than 100KPA. The duration of test pressure depends on the packaging materials. For plastic packaging and inner container, the composite packaging made of plastic material is 30min, and for packaging and composite packaging made of other materials, it is 5min. It is qualified if there is no air leakage within the pressure holding duration

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