SN/T 1731.7-2006 English PDF

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SN/T 1731.7-2006: Safety performance test for pyrotechnic composition used for export fireworks and firecrackers. Part 7: Moisture absorption capability
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 1731.7-2006	179	Add to Cart	2 days	Safety performance test for pyrotechnic composition used for export fireworks and firecrackers. Part 7: Moisture absorption capability	Valid

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GB/T 3634.2   GB/T 3634.1   SN/T 1731.2   SN/T 1731.12   SN/T 1731.11   

Basic data

Standard ID: SN/T 1731.7-2006 (SN/T1731.7-2006)
Description (Translated English): Safety performance test for pyrotechnic composition used for export fireworks and firecrackers. Part 7: Moisture absorption capability
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: G89
Classification of International Standard: 71.100.30
Word Count Estimation: 5,58
Date of Issue: 2006-01-26
Date of Implementation: 2006-08-16
Regulation (derived from): Industry Standard Notice 2006 No. 4 (total of 76)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the use of fireworks exports hygroscopic pyrotechnic Test methods for verification. This standard applies to exports of fireworks with pyrotechnic hygroscopic test.

SN/T 1731.7-2006: Safety performance test for pyrotechnic composition used for export fireworks and firecrackers. Part 7: Moisture absorption capability

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Safety performance test for pyrotechnic composition used for export fireworks and firecrackers.Part 7. Moisture absorption capability Book of the People's Republic of China Entry and Exit Inspection and Quarantine Export fireworks and firecrackers with pyrotechnics Safety performance test method Part 7. Determination of hygroscopicity Released on.2006-01-26 Implementation of.2006-08-16 People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

SN/T 1731 "Test method for safety performance of pyrotechnics for export of fireworks and firecrackers" is divided into. --- Part 1. General; --- Part 2. Determination of thermal stability at 75 ° C; --- Part 3. Determination of the explosion point; --- Part 4. Qualitative analysis of banned restricted drugs; ---Part 5. Determination of impact sensitivity; ---Part 6. Determination of friction sensitivity; ---Part 7. Determination of hygroscopicity; --- Part 8. Determination of ignition temperature; ---Part 9. Determination of flame sensitivity; --- Part 10. Determination of static spark sensitivity. This part is the seventh part of SN/T 1731. This part is proposed and managed by the National Certification and Accreditation Administration. This section drafted by. Jiangxi Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this section. Liu Jieguang, Wu Jinsong, Zeng Shaohua, He Xiaohua, Xiong Yongling. This section is the first industry standard for entry-exit inspection and quarantine. Safety test method for pyrotechnics for fireworks and firecrackers Part 7. Determination of hygroscopicity

1 Scope

This part of SN/T 1731 specifies the test method for the hygroscopicity test of pyrotechnics for exporting fireworks and firecrackers. This section applies to the inspection of the hygroscopicity of pyrotechnics used in exporting fireworks and firecrackers.

2 Test methods

2.1 Basic principles The dried sample was placed in a humidifier containing a saturated solution of potassium nitrate at the bottom, and after 24 hours, the percentage increase in moisture was measured. 2.2 Instruments and reagents 2.2.1 Thermostat or thermostatic chamber. Temperature control accuracy ± 2 ° C, control temperature 20 ° C, continuous operation for 120 h. 2.2.2 Balance. The sensitivity is 0.0001g. 2.2.3 Weighing bottle. bottom diameter 60mm±1mm, height 30mm±2mm. 2.2.4 Drying box. The inner diameter is 240mm～260mm, and silica gel is used as the desiccant. 2.2.5 Potassium nitrate. 2.2.6 Hygrostat. Clean the glass dryer with a diameter of 240mm～260mm, and seal the part with Vaseline. Weigh 650 g of potassium nitrate was added to 500 mL of distilled water exceeding 70 ° C under stirring, and when the solution was cooled to about 60 ° C, it was quickly poured into a desiccator. After cooling, dry the wall of the dryer, place the perforated partition, place a piece of perforated filter paper on the partition, cover it, and place the hygrostat at a temperature of 20 °C ± Stand in a 2 ° C thermostatic chamber or incubator. 2.2.7 Vacuum drying oven or electric constant temperature water oven. 2.3 Test preparation 2.3.1 Instrument preparation 2.3.1.1 Control the temperature of the constant temperature chamber or incubator (2.2.1) at 20 °C ± 2 °C, and stabilize for 4 hours. 2.3.1.2 Wash the weighing bottle (2.2.3), dry it in a desiccator (2.2.4), and place it for 24 hours. 2.3.2 Sample preparation 2.3.2.1 The sample shall all pass through a 400 μm sieve and the sample shall be divided by a quarter method. 2.3.2.2 Take about 12g sample in the weighing bottle (2.2.3), in the vacuum oven (2.2.7) at 55 °C ± 2 ° C, vacuum pressure 9kPa Dry for 2h under ~12kPa condition; or dry at constant temperature for 4h at the same temperature in an electric oven (2.2.7). Placed in a dry box (2.2.4) Inside, cool to room temperature for use. 2.3.2.3 If the incubator is tested, the temperature of the balance chamber shall not be lower than 18 °C. If a constant temperature chamber is used, the balance shall be placed in a constant temperature chamber. Weighing The dryer used should be placed in a constant temperature room or a balance chamber. 2.4 Test procedure 2.4.2 In the constant temperature process, if there is no automatic temperature recorder, record the temperature of the constant temperature chamber or the incubator every 0.5h, automatic recorder Or observation point data, any of which should not be lower than 18 ° C, higher than 22 ° C, otherwise, this experiment is invalid, should be redone (sample can not Reuse). ......

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