Rules for performance inspection of IBCs for exprot dangerous goods—Part8:Metal IBCs
Some standard content:
SN/T 0987.8-2013, Entry-Exit Inspection and Quarantine Industry Standard of the People's Republic of China
Replaces SN/T0987.8-2001
Rules for performance inspection of IBCs for export dangerous goods-Part 8:Metal IBCs
2013-11-06 Issued
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
2014-06-01 Implementation
SN/TO987 "Inspection Procedure for Intermediate Bulk Containers of Dangerous Goods for Export" is divided into 8 parts: Part 1: General Principles;
- Part 2: Identification for Use;
- Part 3: Composite Intermediate Bulk Containers: Part 4: Rigid Plastic Intermediate Bulk Containers;- Part 5: Wooden Intermediate Bulk Containers: Part 6: Flexible Intermediate Bulk Containers;
- Part 7: Fiberboard Intermediate Bulk Containers: Part 8: Metal Intermediate Bulk Containers.
This part is Part 8 of SN/T0987
This part was drafted in accordance with the rules given in GB/T1.1-2009. SN/T0987.8--2013
This part replaces SN/T0987.8-2001 "Performance test procedures for intermediate bulk containers for export of dangerous goods - metal intermediate bulk containers".
Compared with SN/T0987.8-2001, the main technical changes of this part are as follows: - Updated the referenced documents, and added the relevant international dangerous goods regulations as referenced documents after the referenced standards; modified the definition of inspection lot;
- Removed the classification of metal intermediate bulk containers from the original definition part, and added Chapter 4 Classification: Added the test sequence of the test method and the requirements and test contents of the vibration test and qualified judgment. This part is proposed and managed by the Certification and Accreditation Administration of the People's Republic of China. Drafting units of this part: Tianjin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Guangzhou Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
Main drafters of this part: Li Ningtao, Luo Xuan, Zhang Yong, Zhong Bangqi, Li Xiuping, Gao Jian. The previous versions of the standard replaced by this part are: SN/T0987.8—2001.
1 Scope
Inspection procedures for intermediate bulk containers of dangerous goods for export Part 8: Metal intermediate bulk containers
SN/T0987.8-2013
This part of SN/T0987 specifies the definition, classification, requirements, sampling, inspection and disposal of non-conforming metal intermediate bulk containers for dangerous goods for export.
This part applies to the performance inspection of metal intermediate bulk containers for dangerous goods for export. Normative references
The following documents are indispensable for the application of this document. For all dated references, only the dated versions apply to this document. For all undated references, the latest versions (including all amendments) apply to this document. SN/T0370.1 Inspection Procedure for Export Dangerous Goods Packaging Part 1: General SN/T0987.1 Inspection Procedure for Export Dangerous Goods Intermediate Bulk Containers Part 1: General Recommendations on the Transport of Dangerous Goods Model Regulations (United Nations, 17th revised edition 3 Terms and Definitions
The terms and definitions defined in SN/T0370.1 and SN/T0987.1 and the following terms and definitions apply to this document. 3.1 www.bzxz.net
Inspection lot
A lot produced with the same raw materials, the same process, and the same structure and brought together Intermediate bulk container for dangerous goods of a fixed quantity. 3.2
Metal intermediate bulk container metalIBCs
Intermediate bulk container consisting of a metal box and appropriate auxiliary equipment and structural devices. 4 Classification
According to the United Nations "Recommendations on the Transport of Dangerous Goods Model Regulations", there are three types of metal intermediate bulk containers: used for transporting solids loaded or unloaded by gravity (11A, 11B, 11N); a)
used for transporting solids loaded or unloaded at a gauge pressure greater than 10kPa (21A21B, 21N). c
5 Requirements
used for transporting liquids (31A, 31B, 31N). Intermediate bulk containers intended for transporting liquids and complying with the provisions of this standard cannot be used to transport liquids with a vapor pressure greater than 110kPa at 50℃ or a vapor pressure greater than 130kPa at 55℃. 5.1 Each intermediate bulk container intended for liquids shall be subjected to a sealing test when it is used for the first time and when it is put back into use after repair. During the test, the intermediate bulk container does not need to be equipped with its own closure device. 5.2 The box body shall be made of suitable ductile metal materials that have fully demonstrated their weldability. The welding process should be good and can ensure absolute safety. SN/T0987.8—2013
. If necessary, low temperature performance should be taken into account. 5.3. If the contact between the transported substance and the material used to make the shell will cause the thickness of the box wall to continue to decrease, the thickness of the box wall should be appropriately increased during manufacturing. This allowable corrosion thickness should be added to the box wall thickness determined in 5.7. 5.4 Care should be taken to avoid damage caused by the battery effect caused by the juxtaposition of different metals. Aluminum intermediate bulk containers used for the transportation of flammable liquids should not have moving parts made of unprotected steel that is prone to rust. 5.5
Metal intermediate bulk containers shall be made of metals that meet the following requirements: for steel, the elongation at break shall not be less than 10000/R, and the absolute minimum value is 20%; where: R is the guaranteed minimum tensile strength of the steel used, in N/mm; for aluminum, the elongation at break shall not be less than 10000/6R㎡, and the absolute minimum value is 8%. b)
The specimen used to determine the elongation at break shall be cut from a direction perpendicular to the rolling direction, and the length taken shall be calculated according to formula (1) or formula (2): L. =5d
L. =5.65VA
Where:
Length of the specimen before the test:
Diameter:
Cross-sectional area of the specimen.
5.7 Minimum wall thickness: for R, ×A. =10000 reference steel, the wall thickness should not be less than the provisions of Table 1. Minimum wall thickness of intermediate bulk container
Wall thickness
>1.0,≤2.0
Unprotected
11A,11B.11N
Protected
..(2)
21A.21B,21N.31A.31B.31N
Unprotected
Note: A. is the minimum elongation percentage of the metal used when it breaks under tensile stress (see 5.6). For other metals other than the reference steel mentioned above, the minimum wall thickness can be calculated by formula (3): E, = 21.4E./RA
Wherein:
Equivalent wall thickness required for the metal used, in millimeters (mm); Minimum wall thickness required for the reference steel, in millimeters (mm); Minimum guaranteed tensile strength of the gold screen used, in Newtons per square millimeter (N/mm) A.
-Minimum elongation percentage of the metal used when it breaks under tensile stress. In any case, the wall thickness cannot be less than 1.5mm. Add protection
-(3)
5.8 Intermediate bulk containers loaded with liquids should be able to emit sufficient amount of vapor when the container is engulfed by flames to ensure that the container will not crack. This can be achieved through conventional pressure reducing devices or other structural devices. 5.9 The initial degassing pressure should not be higher than 65kPa; nor should it be lower than the total gauge pressure of the intermediate bulk container at 55°C (i.e. the vapor pressure of the contents plus the partial pressure of air or other inert gas, minus 100kPa). The required pressure reducing device should be installed in the vapor space. 2
6 Sampling
SN/T0987.8-2013
Metal intermediate bulk containers produced with the same raw materials, the same process and the same structure are considered as one inspection batch. 6.1
2 If any of the raw materials, process and structure are changed, a new application for inspection is required. If there is only a slight difference between the intermediate bulk container and its design type, such as a slight reduction in external dimensions, selective testing may be allowed for this intermediate bulk container. The sampling quantity is shown in Table 2. Without affecting the inspection results, the inspection shall be carried out in the order of the inspection items in Table 3, and the sampling quantity may be reduced by 6.3
Quantity, two samples are subjected to multiple tests at the same time. Table 2
Test items
Vibration test
Bottom lifting test
Top lifting test
Stacking test
Leakage test
Hydraulic test
Drop test
Sampling method: Randomly select from the entire inspection batch. Performance inspection
Inspection items
Sampling quantity
Sampling quantity/piece
The inspection items of metal intermediate bulk containers are shown in Table 3. The inspection order is carried out in the order from top to bottom in Table 3. Table 35
Inspection items
Inspection items
Vibration test
Bottom lifting test
Pre-lifting test
Stacking test
Leakage test
Hydraulic test
Drop test
11H1.11H2
Not required
Requirement·
Requirement5
Not required
Not required
Type of intermediate bulk container
21H1.21H2
Not required
Requirement·
Requirement*
31H1.31H2
Requirement"
If the intermediate bulk container is designed for this loading and unloading method, at least Carry out one of the tests (top lift or bottom lift). Applicable to intermediate bulk containers designed for stacking. SN/T0987.8-2013
7.2 Test content
7.2.1 Vibration test
7.2.1.1 Scope of application: All intermediate bulk containers loaded with liquids - as a design model test. Note: This test is applicable to the design models of intermediate bulk containers manufactured from January 1, 2011. 7.2.1.2 Sample preparation: The intermediate bulk container to be tested should be selected randomly, and be debugged and closed before transportation. Fill the intermediate bulk container with water to not less than 98% of its maximum capacity. 7.2.1.3 Test method and time: The intermediate bulk container is placed in the center of the test machine platform, with a vertical sinusoidal curve and double amplitude. Peak to peak value) 25mm (1±5%). If necessary, install a restraint on the platform to prevent the specimen from sliding off the platform in the horizontal direction, but do not restrict up and down movement.
The test should be carried out for 1 hour. The frequency used should cause the intermediate bulk container to momentarily detach from the vibration platform during a period of time in each cycle, so that a metal sheet can be intermittently and completely inserted into the gap between the bottom of the intermediate bulk container and the test platform. After the frequency is set for the first time, adjustments may be required to prevent the container from resonating, but the test frequency must always ensure the requirements of this paragraph. The ability to insert a metal sheet under the intermediate bulk container and the ability for the metal sheet to be continuously inserted are the basic requirements for passing this test. The metal sheet used in this test should be at least 1.6mm thick, 50mm wide, and long enough to Insert at least 100 mm between the intermediate bulk container and the test platform to complete the test.
7.2.1.4 Acceptance criteria: No leakage or cracking is observed. In addition, no structural damage or failure, such as cracked welds or looseness, is observed. 7.2.2 Bottom lifting test
7.2.2.1 Scope of application: Metal intermediate bulk containers equipped with bottom lifting devices. 7.2.2.2
Specimen preparation: The intermediate bulk container shall be filled to 1.25 times its maximum allowable gross weight, and the load shall be evenly distributed. 3 Test method The intermediate bulk container shall be lifted and lowered twice by a forklift, with the forks positioned in the center so that the distance between them is equal to 75% of the length of the entry surface (except for those with fixed entry points). The entry depth shall be 75% of the depth in the entry direction. This test shall be repeated for each possible entry direction.
7.2.2.4 Acceptance criteria: No loss of contents: The intermediate bulk container does not show any permanent deformation that would endanger transportation safety. 7.2.3 Top lifting test
Scope of application: Metal intermediate bulk containers equipped with top lifting devices7.2.3.2
5min.
Sample preparation: The intermediate bulk container shall be filled to twice its maximum allowable gross weight. Test method: The intermediate bulk container shall be lifted according to the designed lifting method until it is off the ground and maintained at a height of at least Qualification criteria: No loss of contents, the intermediate bulk container does not show any permanent deformation that would endanger transportation safety. 7.2.4 Stacking test
7.2.4.1 Scope of application: Metal intermediate bulk containers used for stacking and storage. 2 Sample preparation: The intermediate bulk container shall be filled to its maximum allowable gross weight. 7.2.4.2
7.2.4.3 Test method: The intermediate bulk container shall be placed with its bottom downward on a hard and flat surface, and then a uniformly distributed test load (see 7.2.4.4) shall be applied to it for at least 5 minutes.
7.2.4.4 Calculation of test load: The test load applied to the intermediate bulk container shall be equivalent to 1.8 times the sum of the maximum allowable total weight of the number of identical intermediate bulk containers stacked on it during transportation. 7.2.4.5 Acceptance criteria: There is no loss of the contents, and the intermediate bulk container does not have any permanent deformation that will endanger transportation safety. 4
7.2.5 Leakage test
SN/T0987.8—-2013
Scope of application: Intermediate bulk containers used for transporting liquids or for transporting solids using pressure loading and unloading methods. 7.2.5.1
Sample preparation: The test shall be carried out before the insulation equipment is installed. The vents shall be replaced with non-vented devices or blocked. 7.2.5.2
Test method and applied pressure: This test shall be carried out for at least 10 minutes using air at a gauge pressure of not less than 20 kPa. The airtightness of the tested IBC shall be determined by appropriate methods, such as applying soapy water to the welds and joints, using air pressure differential testing or placing the IBC in water. If the latter method is used, a correction factor for hydrostatic pressure shall be applied. 7.2.5.4 Acceptance criterion: No leakage. 7.2.6 Hydraulic test
7.2.6.1 Scope of application: For IBCs 21A, 21B, 21N, 31A, 31B and 31N 7.2.6.2 Sample preparation: This test shall be carried out before the insulation equipment is installed. The pressure relief device should be in the non-operating state, or the pressure relief device should be removed and the opening blocked.
7.2.6.3 Test method: This test should be carried out for at least 10 minutes at a pressure not less than that specified in 7.2.6.4. During the test, the intermediate bulk container shall not be subject to any mechanical restraint.
7.2.6.4 Applied pressure:
For all IBCs 21A, 21B, 21N, 31A, 31B and 31N used for solids in packing groups, a)
Use 250 kPa gauge pressure;
For all IBCs 21A, 21B, 21N, 31A, 31Bb)
and 31N used for substances in packing groups I and III, use 200 kPa gauge pressure:
In addition to the above pressures, for IBCs 31A, 31B and 31N used for liquids, use 65 kPa gauge pressure. c
This test should be performed before the 200 kPa test. 7.2.6.5
Qualification criteria:
For IBCs 21A, 21B, 21N, 31A, 31B and 31N pressure tested in accordance with 7.2.6.4a) and b) there shall be no leakage.
For IBCs 31A, 31B and 31N pressure tested in accordance with 7.2.6.4c) there shall be no leakage and no permanent deformation b)
that would endanger the safety of transport of the IBC. 7.2.7 Drop test
7.2.7.1 Sample preparation: IBCs for solids shall be filled to not less than 95% of their capacity and IBCs for liquids shall be filled to not less than 98% of their capacity, depending on the design type. The pressure relief device shall be determined to be inoperative, or the pressure relief device shall be removed and its opening blocked.
Intermediate bulk containers shall be filled in accordance with the provisions of this standard. The intended cargo may be replaced by other substances, but this shall not affect the test results. In the case of solid substances, when another substance is used as a substitute, the physical properties (weight, particle size, etc.) of the substitute substance shall be the same as those of the substance to be transported. It is permitted to use additives such as bags of lead shot to achieve the specified total package weight, as long as the additives are placed in a way that does not affect the test results.
7.2.7.2 Test method: The intermediate bulk container shall be dropped onto a hard, inelastic, smooth, flat and horizontal surface. The dropping shall be carried out in such a way that the bottom of the intermediate bulk container, which is considered to be the most vulnerable part, becomes the point of impact. Intermediate bulk containers with a capacity equal to or less than 0.45m3 shall also be subjected to a drop test on the weakest part in addition to the first drop. The same or different intermediate bulk containers may be used for each drop. 7.2.7.3 See Table 4 for drop height.
SN/T0987.8—2013
Packing group I
Table 4 Drop height
Packing group II
Packing group dish
Unit: meter
When a box to be loaded with liquid is subjected to a drop test, if another substance is used instead, the relative density and viscosity of this substance should be similar to those of the substance to be transported7.2.7.4
. Water can also be used for the drop test. The drop height is as follows: a)
If the relative density of the substance to be transported does not exceed 1.2, the drop height is shown in Table 4; if the relative density of the substance to be transported is greater than 1.2, the drop height should be calculated based on the relative density d of the substance to be transported (rounded to the first decimal place) (see Table 5).
I Packaging
Qualification criteria
Drop height calculation
II Packaging
Plus Packaging
If all the above tests are qualified, the inspection batch is qualified. If there is one unqualified, the inspection batch is unqualified. 8
Disposition of unqualified
Unit is meter
If only one item is unqualified in the inspection result, double sampling should be carried out for re-inspection. If there is still one or more unqualified items, the inspection batch is judged to be unqualified.
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