Some standard content:
4.2 and 6.4.2.4 of this standard are recommended, and the rest are mandatory. Appendix A of this standard is a normative appendix, and Appendix B is an informative appendix. This standard is proposed by China North Industries Group Corporation. This standard is under the jurisdiction of China North Industries Standardization Institute. The drafting unit of this standard is Liaoning Huafeng Chemical Industry (Group) Co., Ltd. The main drafters of this standard are Zhao Mingzhong and Fang Xiuyi. GB19417—2003
1 Scope
Detonating Cord Detonator
GB19417—2003
This standard specifies the classification, requirements, inspection rules, test methods, marking, packaging, transportation, storage, etc. of detonating cord detonators. This standard applies to the manufacture and acceptance of No. 6 and No. 8 detonating cord detonators. 2 Normative References
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard. GB190 Dangerous Goods Packaging Marking
GB/T2828 Attribute Sampling Procedure and Sampling Table for Batch Inspection (Applicable to Inspection of Continuous Batch)GB/T 2829
Attribute Sampling Procedure and Table for Periodic Inspection (Applicable to Inspection of Process Stability)GB/T4883-1985 Statistical Processing and Interpretation of Data Judgment and Treatment of Outliers in Normal SamplesGB/T6378 Measurement Sampling Inspection Procedure and Chart for Defective Product Rate (Applicable to Inspection of Continuous Batch)GB/T 8170
Numerical Rounding Rules
GB9969.1 Instructions for Use of Industrial Products
: General Principles
GB/T 10111
GB/T 13225
Method for Random Sampling Using Random Numbers Method for Determination of Delay Time of Industrial Detonators
GB/T 13226
Test method for lead plate of industrial detonator
GB/T 13227
Test method for immersion of industrial detonator
General rules for guarantee documents of industrial products
GB/T 14436
WJ83 Wooden box for ammunition packaging
WJ231 Vibration testing machine
WJ/T9010 Corrugated paper box for packaging of industrial detonatorsWJ/T9031 Classification and naming rules of industrial detonators 3 Classification and naming
Detonating tube detonators are divided into ordinary type detonating tube detonators and high-strength type detonating tube detonators according to tensile properties; they are divided into millisecond detonating tube detonators, 1/4 second detonating tube detonators, half second detonating tube detonators and second detonating tube detonators according to delay time. The naming of detonating tube detonators shall be carried out in accordance with the provisions of WJ/T9031. 4 Requirements
4.1 Appearance
The appearance of the detonating tube detonator shall meet the following requirements:a) There shall be obvious and easily recognizable segment marks;b)
The surface of the fire detonator shall not have obvious floating powder, rust, serious sand holes and cracks. Slight dirt, mouth cracks and mechanical damage are allowed;
The detonating tube shall not be damaged, broken, thin, water ingress, impurities in the tube, poor plasticization, and loose sealing;c)
d) The combination of the detonating tube and the fire detonator shall be firm and shall not fall out or loosen. 1
GB 19417--2003
4.2 Detonating tube length
The basic length of the detonating tube is 3_., m, which can also be specified in the contract. 4.3 Performance
4.3.1 Anti-vibration performance
The detonating cord detonator shall vibrate continuously for 10 minutes on the vibration test machine, and there shall be no explosion, loose structure or damage. 4.3.2 Detonation capability
No. 6 detonating cord detonator shall be able to explode through a lead plate with a thickness of 4mm, and No. 8 detonating cord detonator shall be able to explode through a lead plate with a thickness of 5mm. The lead plate perforation diameter shall not be less than the outer diameter of the detonator. 4.3.3 Water resistance
4.3.3.1 Ordinary detonating cord detonator: immersed in a water-filled container with a water depth of 1m, kept for 8 hours, then taken out, and immediately carried out a timing test. There shall be no misfire or half-explosion.
4.3.3.2 Water-resistant detonating cord detonator: immersed in a water-filled container with a water depth of 20m or a water pressure equivalent to 20m, kept for 24 hours, then taken out, and immediately carried out a timing test. There shall be no misfire or half-explosion. 4.3.4 Tensile performance
4.3.4.1 Ordinary detonating cord detonator: Under a static tensile force of 19.6N for 1min, the detonating cord should not fall out of the bayonet plug. 4.3.4.2 High-strength detonating cord detonator: Under a static tensile force of 78.4N for 1min, the detonating cord should not fall out of the bayonet plug. 4.3.5 Delay time
The delay time of each section of detonating cord detonator shall generally comply with the provisions of Table 1, and other delay time series can also be produced as needed. 4.3.6 Oil resistance
High-strength detonating cord detonator is immersed in 0# diesel with a temperature of (75±5)℃ and a pressure of (0.3±0.02)MPa, and is naturally cooled. After 24 hours, it is taken out and the ignition reliability test is immediately carried out. It should not misfire or explode. Table 1 Delay time of each section of detonating tube detonator Delay time (in nominal seconds)
Millisecond detonating tube detonator
First series Second series Third series
1/4 second detonating tube detonator
First series
Half second detonating tube detonator
Second series
Second detonating tube detonator
First series
Second series
Millisecond detonating tube detonator
First series Second series Third series
Test method
5.1 Appearance
Visual inspection.
5.2 Detonating tube length
Table 1 (continued)
Delay time (in nominal seconds)
1/4 second detonating tube detonator
First series
Measured with a ruler with an accuracy of not less than 0.01m. 5.3 Anti-seismic performance
Half second detonating tube detonator
First series
Second series
GB 19417—2003
Second detonating tube detonator
First series" Second series
Put the sample in the center of the bottom of the wooden box of the vibration test machine that meets the requirements of WJ231, plug the gap, and vibrate continuously for 10 minutes at a frequency of 60 times/min and a drop height of (150±2) mm. Check whether the detonating tube detonator has exploded, the structure is loose or damaged. 5.4 Detonation capability
Perform in accordance with the provisions of GB/T13226.
5.5 Water resistance
Perform in accordance with the provisions of GB/T13227.
5.6 Tensile performance
Fix one end of the sample on the static tensile test device and hang a load of specified weight on the other end for 1 minute, then remove it and check whether the detonating tube is out of the bayonet plug. 5.7 Delay time
5.7.1 The timing instrument shall meet the following requirements
GB 19417—2003
For millisecond detonating tube detonators, it shall not be less than 0.1 ms; b) For half-second or 1/4-second detonating tube detonators, it shall not be less than 1ms; for second detonating tube detonators, it shall not be less than 10 ms. c)
Test conditions are as follows:
The distance between the detonating end and a target is 1.0m~1.5m;a)
The test temperature is 15℃~30℃;
For products with a detonating tube length of more than 3m, cut off a 3m long detonating tube or measure the time according to the actual length; for products with a detonating tube length of less than 3m, measure the time according to the actual length.
The test steps shall be carried out in accordance with the provisions of GB/T13225. 5.7.3
5.7.4 For the supplementary provisions of the delay time determination, see Appendix A. 5.8 Oil resistance
5.8.1 Instruments and materials
The test instruments and materials are as follows:
a) Container: a container that can be heated and pressurized, 400mm×500mm; b) Diesel: 0#.
5.8.2 Test steps
5.8.2.1 Inject diesel oil into the container to a depth of not less than 300mm, start heating, and when the oil temperature reaches (75±5)℃, immerse the entire sample in the oil and seal it.
5.8.2.2 Pressurize the diesel oil in the container to (0.3±0.02)MPa, stop heating, maintain the pressure, and cool it naturally. Take it out after 24 hours and immediately conduct an ignition reliability test.
5.8.2.3 Observe the phenomena after the test and record the test results. 6 Inspection rules
6.1 Inspection classification
The inspection of detonating cord detonators is divided into type inspection and factory inspection. Type inspection is carried out in the following cases: when the production of new products is finalized or when the production is transferred to acceptance; a)
b) when the production is resumed after a suspension of more than half a year;
c) when there are major changes in product materials, structures, and production processes; d) when the national quality supervision agency proposes type inspection requirements. 6.2 Inspection items
See Table 2 for inspection items.
Table 2 Inspection Items
Inspection Items
Detonating Tube Length
Anti-seismic performance
Detonating capacity
Water resistance
Tensile performance
Delay time
Oil resistance
Requirements Article No.
Test Method Article No.
Type Inspection
Factory Inspection
Batch Inspection
Periodic Inspection
6.3 Batch Rules
GB 19417—2003
The batch submitted for inspection shall consist of products manufactured with basically the same materials, structures, processes, equipment and other conditions, and the batch shall not exceed 35,000 rounds.
6.4 Sampling
6.4.1 Sampling Inspection Procedure
The sampling inspection procedure is shown in Figure 1.
Detonating tube length
Oil resistance
6.4.2 Sampling plan
Seismic performance
Detonating capacity
Tensile performance
Figure 1 Sampling inspection procedure
Delay time
Water resistance
6.4.2.1 The sampling plan for appearance, detonating tube length, seismic performance and detonating capacity shall be implemented in accordance with the provisions of GB/T2828. The number of unqualified products per hundred units is used as the batch quality indicator. Except for the A-type unqualified products of seismic performance, which adopts a single sampling plan, the rest adopt a double sampling plan. The classification of unqualified products, AQL values and inspection levels are shown in Table 3, and the sampling plan examples are shown in Appendix B. Table 3 Appearance, detonating tube length, detonating capability, anti-cyst performance sampling plan Inspection items
Detonating tube length
Detonating capability
Seismic performance
Unqualified classification
Class B unqualified: There is obvious floating powder on the surface of the fire detonator, cracks in the tube body, and serious sand holes; the detonating tube has water ingress, damage, and broken powder; the connection between the detonating tube and the fire detonator is loose. Class C unqualified: There is rust, serious cracks or mechanical damage on the surface of the fire detonator; the detonating tube is thinned, the tube is Internal impurities, poor plasticization, loose sealing, no segmentation mark or unclear mark
Class C failure: less than the specified size limit
Class B failure: misfire or half explosion after the test as requiredC failure: the lead plate perforation diameter is less than the outer diameter of the detonator after the test as required
Class A failure: explosion after the test as requiredClass B failure: loose structure or damage after the test as requiredAQL value
Inspection level
GB 19417-—2003
6.4.2.2 The sampling plan for tensile properties, water resistance and oil resistance shall be implemented in accordance with the provisions of GB/T2829, using the number of unqualified products per hundred units as the batch quality indicator, and adopting a secondary sampling plan. See Table 4 for the failure classification, RQL value and inspection level, and Appendix B for the sampling plan example.
Table 4 Sampling plan for tensile properties, water resistance and oil resistance Test items
Tensile properties
Water resistance
Oil resistance
Unqualified classification
Class B unqualified: Detonator tube comes out of the bayonet plug after the test as required Class B unqualified: Half explosion or misfire occurs after the test as required Class B unqualified: Half explosion or misfire occurs after the test as required RQL value
Test level
6.4.2.3 The sampling plan for the extended time shall be implemented in accordance with the provisions of GB/T6378, and the S method shall be used to combine the bilateral specification limits, the AQL value shall be 2.5, and the test level shall be S-4. For an example of the sampling plan, please refer to Appendix B. 6.4.2.4 Inspection cycle regulations: Batch inspection is carried out at the beginning of the inspection. If three batches are qualified in batch inspection (excluding resubmission of inspection batches), one batch can be sampled every 10 batches from the next batch; if one batch fails in the periodic inspection, batch inspection will be carried out from the next batch. If three batches are qualified in a row (excluding resubmission of qualified batches), it can still be transferred to periodic inspection. 6.4.2.5 The transfer rules for batch inspection shall be implemented in accordance with the provisions of GB/T2828. The type inspection shall be implemented in accordance with the stricter scheme. 6.4.3 Sampling method
The samples required for appearance inspection are randomly selected directly from the submitted inspection batches, and the samples required for the inspection of other items are randomly selected from the samples that have passed the previous inspection according to the procedure shown in Figure 1. If there are not enough, they can be randomly selected from the samples that have passed the appearance inspection. The random sampling method shall be implemented in accordance with the provisions of GB/T10111.
6.4.4 Judgment rules
If all the inspected items meet the requirements specified in Chapter 4, the batch of products is judged to be qualified, otherwise the batch of products is judged to be unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Each detonator should have a clear and easily recognizable delay category code mark. The delay category codes for milliseconds, 1/4 seconds, half seconds, and seconds are: MS, QS, HS, S respectively.
7.1.2 The outer packaging box of the detonating cord detonator should have at least the following markings: a) product name and specification model;
standard number;
production license number;
"explosive goods" mark, which should comply with the provisions of GB190; d)
"Handle with care", "fireproof" and "moisture-proof"; batch number;
quantity;
h) manufacturing date;
i) name and address of the manufacturer.
7.2 Packaging
7.2.1 Packaging requirements
Put the specified number of products into plastic bags and then into packaging boxes. The packaging boxes should be wooden boxes that meet the requirements of WJ83 or boxes with performance not lower than that of WJ/T9010. Cartons, fiberboard boxes with wooden frames are allowed (the fiberboard thickness is not less than 3mm, the width of the wooden frame slats is not less than 50mm, and the thickness is not less than 14mm). The net weight of each package box should not exceed 20kg. 7.2.2 Documents accompanying the product
Each package box should be accompanied by a product certificate and instruction manual. The preparation of the product certificate shall comply with the provisions of GB/T14436, and the preparation of the instruction manual shall comply with the provisions of GB9969.1. 7.2.3 Packaging inspection
GB19417—2003
The sampling plan for packaging inspection shall be implemented in accordance with the provisions of GB/T2828. The required samples shall be randomly selected from the submitted inspection batch (with boxes as the sample unit), and the random sampling method shall be in accordance with GB/T1011 1. See Table 5 for non-conforming categories, AQL values, inspection levels and sampling types. See Appendix B for an example of a sampling plan.
Packaging sampling plan
Inspection items
7.3 Transportation
Non-conforming categories
Class B non-conforming: incorrect marking, incomplete content. Class C non-conforming: unclear marking, no product certificate or instruction manual. The transportation of detonating cord detonators shall comply with the relevant national regulations on the transportation of dangerous goods. 7.4 Storage
AQL value
Inspection level
Sampling type
Primary sampling
Secondary sampling
Detonating cord detonators shall be stored in a non-heated, dry, and ventilated warehouse in the original packaging conditions. Since the manufacture From the date of the test, the shelf life is two years.
GB19417—2003
A. 1 Upper and lower specification limits of the extension time
Appendix A
(Normative Appendix)
Supplementary provisions for the determination of the extension time
The upper specification limit (U) of the extension time of any delay detonating cord detonator is the median of the extension time of the section and the upper delay time, while the lower specification limit (L) of the extension time is the median of the extension time of the section and the lower delay time. When the instantaneous detonating cord detonator is used in combination with the delay detonating cord detonator, the lower specification limit of the extension time is zero. The upper specification limit of the extension time of the terminal delay detonating cord detonator can be obtained by adding the difference between the terminal delay time and the lower specification limit of the extension time plus the extension time of the section. Example:
Half a second 1 section: 1.=0;U=(0+0.50)/2=0.25. Half a second 10 segments: L = (4.00 + 4.50) / 2 = 4.25; U (4.50 - 4.25) + 4.50 = 4.75. A.2 Determination of whether the extension time is qualified or not || tt || A.2.1 After the test, calculate according to formula (A.1) and formula (A.2) Figure A.1. The values of the abscissa (α) and ordinate (y) of the acceptance curve shown in S
Where:
S-standard deviation of the sample delay time, in seconds (s) or milliseconds (ms)); U-upper specification limit of the sample delay time, in seconds (s) or milliseconds (ms); L-lower specification limit of the sample delay time, in seconds (s) or milliseconds (ms); X-average value of the sample delay time, in seconds (s) or milliseconds (ms). ....( A.1)
The significant figures of the delay time and its average value and standard deviation in recording and calculation should be the same as those given in Table 1. When calculating y, three significant figures should be retained, and the next digit should be rounded according to the provisions of GB/T8170. A.2.2 Draw the point (z, y) on the corresponding acceptance curve. If the point falls within the acceptance curve (including the curve), it is qualified, otherwise it is unqualified.
A.3 Misfire or half explosion during the test
If only one misfire or half explosion occurs during the test, which is not caused by water ingress, the record shall be kept for reference, and another batch of batches may be randomly selected from the samples that have passed the appearance inspection for testing, and the test value shall be added and recalculated; if two or more batches of misfire or half explosion occur, which are not caused by water ingress, no additional test shall be performed, and the extension time shall be directly judged as unqualified.
A.4 Judgment and treatment of abnormal values
A.4.1 Judgment of abnormal values
If only one extreme test value appears during the test, the judgment shall be made according to the method specified in 5.2 of GB/T4883-1985. That is, the upper and lower statistical values G and G% shall be calculated according to formula (A.3) and formula (A.4). G,=
(Xmax —X)
(X-Xmn)
..( A.3)
......( A. 4)
Wherein:
-standard deviation of sample delay time, in seconds (s) or milliseconds (ms); S-
x-average value of sample delay time, in seconds (s) or milliseconds (ms); Xmax
-maximum value of sample delay time, in seconds (s) or milliseconds (ms); Xmin
minimum value of sample delay time, in seconds (s) or milliseconds (ms). GB19417-2003
If G, or G is greater than the critical value, the extreme test value is determined to be an abnormal value; otherwise, it is determined to be no abnormal value and is processed as a normal test value. Example:
At the detection level of 5%, the critical value is Go.95 (20) = 2.557 (n = 20). If G2 or G20 is greater than 2.557, the extreme test value is determined to be an abnormal value; otherwise, it is determined to be no abnormal value and is processed as a normal test value. A.4.2 Processing of abnormal values
When only one extreme test value appears in the test and is determined to be an abnormal value, the abnormal value is eliminated and recorded for future reference. Another sample can be randomly selected from the samples that have passed the static tensile test for testing and additional test values can be added. If two or more extreme test values appear in the test, or extreme test values appear again after supplementary testing, the abnormal value is not determined and the result is calculated directly. Normal inspection
Figure A.1 Delay time acceptance curve
(Batch is 3201 to 10000 rounds)
Strictened inspection
Relaxed inspection
GB 19417--2003
For an example of the sampling plan, see Table B.1.
Inspection items
Appendix B
(Informative Appendix)
Example of sampling plan
Example of sampling plan
Sampling plan
Factory inspection
Batch inspection
Normal: 125,125/0,3;3,4
Class B failure
Class C failure
Detonating tube length ( Class C unqualified)
Class B unqualified
Detonation capacity
Class C unqualified
Class A unqualified
Seismic performance
Class B unqualified
Tensile performance (Class B unqualified)
Water resistance (Class B unqualified)
Oil resistance (Class B unqualified)
Delay time (Class B unqualified)
Tightened, 125, 125/0, 21, 2
Relaxed: 50, 50/0, 2; 1, 2
Normal: 125, 125/1, 34, 5
Tightened, 125 125/03; 3, 4
Relaxed: 50, 50/0, 2; 1, 2
Normal: 20, 20/1, 3; 4, 5
Tightened: 20, 20/0 ,3;3,4
Relaxed:8,8/0,2;1,2
Normal:20,20/0,2;1,2
Tightened:20,20/0,2;1,2
Relaxed:8,8/0,2；1,2
Normal:20,20/0,3；3，4
Tightened:20,20/0,2；1,2
Relaxed:8 ,8/0,2;1,2
Normal: 20/0,1
Tightened: 32/0,1
Relaxed: 8/0,1
Normal: 20,20/0,2,1,2
Tightened: 32,32/0,2;1,2
Relaxed: 13,13/0,2;1,2
Normal: 20
Tightened, 20|| tt||Relaxation: 7
Periodic inspection
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Type inspection
125,125/0,2;1,2
125,125/0,3,3,4
20,20/0,3;3 ,4
20,20/0,2;1,2
20,20/0,2;1,2
32/0,1
32,32/0,2;1,2| |tt||12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Sample unit
Inspection items
Class B nonconformity
Class C nonconformity
Batch inspection
Normal: 8/0, 1
Strict: 13/0, 1
Relaxed: 3/0, 1
Normal: 5/0, 1
Strict: 8/0, 1
Relaxed: 2/0, 1
Note: The batch size is 3201~10000 rounds.
Table B.1 (continued)
Sampling plan
Factory inspection
Periodic inspection
GB19417—2003
Sample unit
Type inspection4)
Where: bZxz.net
-Standard deviation value of sample delay time, in seconds (s) or milliseconds (ms); S-
x-Average value of sample delay time, in seconds (s) or milliseconds (ms); Xmax
-Maximum value of sample delay time, in seconds (s) or milliseconds (ms); Xmin
Minimum value of sample delay time, in seconds (s) or milliseconds (ms). GB19417-2003
If G, or G20 is greater than the critical value, the extreme test value is determined to be an abnormal value; otherwise, it is determined to be no abnormal value and is processed as a normal test value. Example:
At the detection level of 5%, the critical value is Go.95 (20) = 2.557 (n = 20). If G2 or G20 is greater than 2.557, the extreme test value is determined to be an abnormal value; otherwise, it is determined to be no abnormal value and is processed as a normal test value. A.4.2 Handling of abnormal values
When only one extreme test value appears in the test and is judged as an abnormal value, the abnormal value shall be eliminated and recorded for future reference. One more round may be randomly selected from the sample that has passed the static tensile test for testing and additional test values may be added. If two or more extreme test values appear in the test, or an extreme test value appears again after the supplementary test, the abnormal value shall not be determined and the result shall be calculated directly. Normal inspection
Figure A.1 Delayed time acceptance curve
(batch is 3201 rounds to 10000 rounds)
Strictened inspection
Relaxed inspection
GB 19417--2003
For an example of the sampling plan, see Table B.1.
Inspection items
Appendix B
(Informative Appendix)
Example of sampling plan
Example of sampling plan
Sampling plan
Factory inspection
Batch inspection
Normal: 125,125/0,3;3,4
Class B unqualified
Class C unqualified
Detonator tube length ( Class C unqualified)
Class B unqualified
Detonation capacity
Class C unqualified
Class A unqualified
Seismic performance
Class B unqualified
Tensile performance (Class B unqualified)
Water resistance (Class B unqualified)
Oil resistance (Class B unqualified)
Delay time (Class B unqualified)
Tightened, 125, 125/0, 21, 2
Relaxed: 50, 50/0, 2; 1, 2
Normal: 125, 125/1, 34, 5
Tightened, 125 125/03; 3, 4
Relaxed: 50, 50/0, 2; 1, 2
Normal: 20, 20/1, 3; 4, 5
Tightened: 20, 20/0 ,3;3,4
Relaxed:8,8/0,2;1,2
Normal:20,20/0,2;1,2
Tightened:20,20/0,2;1,2
Relaxed:8,8/0,2；1,2
Normal:20,20/0,3；3，4
Tightened:20,20/0,2；1,2
Relaxed:8 ,8/0,2;1,2
Normal: 20/0,1
Tightened: 32/0,1
Relaxed: 8/0,1
Normal: 20,20/0,2,1,2
Tightened: 32,32/0,2;1,2
Relaxed: 13,13/0,2;1,2
Normal: 20
Tightened, 20|| tt||Relaxation: 7
Periodic inspection
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Type inspection
125,125/0,2;1,2
125,125/0,3,3,4
20,20/0,3;3 ,4
20,20/0,2;1,2
20,20/0,2;1,2
32/0,1
32,32/0,2;1,2| |tt||12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Sample unit
Inspection items
Class B nonconformity
Class C nonconformity
Batch inspection
Normal: 8/0, 1
Strict: 13/0, 1
Relaxed: 3/0, 1
Normal: 5/0, 1
Strict: 8/0, 1
Relaxed: 2/0, 1
Note: The batch size is 3201~10000 rounds.
Table B.1 (continued)
Sampling plan
Factory inspection
Periodic inspection
GB19417—2003
Sample unit
Type inspection4)
Where:
-Standard deviation value of sample delay time, in seconds (s) or milliseconds (ms); S-
x-Average value of sample delay time, in seconds (s) or milliseconds (ms); Xmax
-Maximum value of sample delay time, in seconds (s) or milliseconds (ms); Xmin
Minimum value of sample delay time, in seconds (s) or milliseconds (ms). GB19417-2003
If G, or G20 is greater than the critical value, the extreme test value is determined to be an abnormal value; otherwise, it is determined to be no abnormal value and is processed as a normal test value. Example:
At the detection level of 5%, the critical value is Go.95 (20) = 2.557 (n = 20). If G2 or G20 is greater than 2.557, the extreme test value is determined to be an abnormal value; otherwise, it is determined to be no abnormal value and is processed as a normal test value. A.4.2 Handling of abnormal values
When only one extreme test value appears in the test and is judged as an abnormal value, the abnormal value shall be eliminated and recorded for future reference. One more round may be randomly selected from the sample that has passed the static tensile test for testing and additional test values may be added. If two or more extreme test values appear in the test, or an extreme test value appears again after the supplementary test, the abnormal value shall not be determined and the result shall be calculated directly. Normal inspection
Figure A.1 Delayed time acceptance curve
(batch is 3201 rounds to 10000 rounds)
Strictened inspection
Relaxed inspection
GB 19417--2003
For an example of the sampling plan, see Table B.1.
Inspection items
Appendix B
(Informative Appendix)
Example of sampling plan
Example of sampling plan
Sampling plan
Factory inspection
Batch inspection
Normal: 125,125/0,3;3,4
Class B unqualified
Class C unqualified
Detonator tube length ( Class C unqualified)
Class B unqualified
Detonation capacity
Class C unqualified
Class A unqualified
Seismic performance
Class B unqualified
Tensile performance (Class B unqualified)
Water resistance (Class B unqualified)
Oil resistance (Class B unqualified)
Delay time (Class B unqualified)
Tightened, 125, 125/0, 21, 2
Relaxed: 50, 50/0, 2; 1, 2
Normal: 125, 125/1, 34, 5
Tightened, 125 125/03; 3, 4
Relaxed: 50, 50/0, 2; 1, 2
Normal: 20, 20/1, 3; 4, 5
Tightened: 20, 20/0 ,3;3,4
Relaxed:8,8/0,2;1,2
Normal:20,20/0,2;1,2
Tightened:20,20/0,2;1,2
Relaxed:8,8/0,2；1,2
Normal:20,20/0,3；3，4
Tightened:20,20/0,2；1,2
Relaxed:8 ,8/0,2;1,2
Normal: 20/0,1
Tightened: 32/0,1
Relaxed: 8/0,1
Normal: 20,20/0,2,1,2
Tightened: 32,32/0,2;1,2
Relaxed: 13,13/0,2;1,2
Normal: 20
Tightened, 20|| tt||Relaxation: 7
Periodic inspection
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Type inspection
125,125/0,2;1,2
125,125/0,3,3,4
20,20/0,3;3 ,4
20,20/0,2;1,2
20,20/0,2;1,2
32/0,1
32,32/0,2;1,2| |tt||12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Sample unit
Inspection items
Class B nonconformity
Class C nonconformity
Batch inspection
Normal: 8/0, 1
Strict: 13/0, 1
Relaxed: 3/0, 1
Normal: 5/0, 1
Strict: 8/0, 1
Relaxed: 2/0, 1
Note: The batch size is 3201~10000 rounds.
Table B.1 (continued)
Sampling plan
Factory inspection
Periodic inspection
GB19417—2003
Sample unit
Type inspection2
Normal: 20
Tightened, 20
Relaxed: 7
Periodic inspection
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Type inspection
125,125/0,2;1,2
125,125/0,3,3,4
20,20/0,3;3,4
20,20/0,2;1,2
20,20/0,2;1,2
32/0,1
32 ,32/0,2;1,2
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Sample unit
Inspection items
Class B unqualified
Class C unqualified
Batch inspection
Normal: 8/0, 1
Tightened: 13/0,1
Relaxed: 3/0,1
Normal: 5/0, 1
Tightened: 8/0,1
Relaxed: 2/0, 1
Note: The batch size is 3201~10000 rounds.
Table B.1 (continued)
Sampling plan
Factory inspection
Periodic inspection
GB19417—2003
Sample unit
Type inspection2
Normal: 20
Tightened, 20
Relaxed: 7
Periodic inspection
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Type inspection
125,125/0,2;1,2
125,125/0,3,3,4
20,20/0,3;3,4
20,20/0,2;1,2
20,20/0,2;1,2
32/0,1
32 ,32/0,2;1,2
12,12/0,2;1,2
20,20/0,2;1,2
20,20/0,2;1,2
Sample unit
Inspection items
Class B unqualified
Class C unqualified
Batch inspection
Normal: 8/0, 1
Tightened: 13/0,1
Relaxed: 3/0,1
Normal: 5/0, 1
Tightened: 8/0,1
Relaxed: 2/0, 1
Note: The batch size is 3201~10000 rounds.
Table B.1 (continued)
Sampling plan
Factory inspection
Periodic inspection
GB19417—2003
Sample unit
Type inspection
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