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GB/T 39996-2021 English PDF

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US$149.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 39996-2021: Fireworks and firecrackers - Determination of calorific value of pyrotechnic powder
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39996-2021	149	Add to Cart	3 days	Fireworks and firecrackers - Determination of calorific value of pyrotechnic powder	Valid

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Basic data

Standard ID: GB/T 39996-2021 (GB/T39996-2021)
Description (Translated English): Fireworks and firecrackers - Determination of calorific value of pyrotechnic powder
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y88
Word Count Estimation: 8,856
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39996-2021: Fireworks and firecrackers - Determination of calorific value of pyrotechnic powder

---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.
Fireworks and firecrackers-Determination of calorific value of pyrotechnic powder ICS 71.100.30 Y88 National Standards of People's Republic of China Determination of the calorific value of the pyrotechnic composition of fireworks Released on 2021-04-30 2021-11-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China National Light Industry Council. This standard is under the jurisdiction of the National Fireworks and Firecracker Standardization Technical Committee (SAC/TC149). Drafting organizations of this standard. Hunan Fireworks and Firecracker Product Safety and Quality Supervision and Inspection Center, Liaoning Province Inspection, Testing and Certification Center. The main drafters of this standard. Yang Lin, Zhu Yuping, Huang Chaxiang, Li Yan, Yan Jinliang, Huang Ruoyan, Ou Daihong, Zhou Lin. Determination of the calorific value of the pyrotechnic composition of fireworks

1 Scope

This standard specifies the method for determining the calorific value of pyrotechnic powder for fireworks. This standard applies to the oxygen bomb calorimetry method.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 601 Preparation of Standard Titration Solution for Chemical Reagents GB/T 7899 Gas cylinder pressure reducer for welding, cutting and similar processes GB/T 8170 Numerical rounding rules and the expression and determination of limit values

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Calorific value of pyrotechnic powder The heat released by the combustion of a unit mass of pyrotechnic powder. Note. The unit is joules per gram (J/g) or megajoules per kilogram (MJ/kg).

4 Principle

Fill a sealed and constant volume oxygen bomb with a certain pressure of oxygen or air, ignite the quantitative sample and completely burn it, and measure the oxygen bomb calorimeter (Constant temperature or adiabatic type) The temperature rise value of the water in the inner cylinder is calculated according to the heat capacity of the calorimetric system to calculate the calorific value of the sample.

5 Reagents or materials

5.1 Oxygen. purity ≥99.5%, no combustible components, electrolytic oxygen should not be used. 5.2 Sodium hydroxide standard solution [c(NaOH)=0.1mol/L]. Prepared and calibrated according to GB/T 601. 5.3 Phenolphthalein indicator. 5g/L. 5.4 Benzoic acid. benchmark calorimetric substance, second-class or above. 5.5 Ignition wire. nickel-chromium wire with a diameter of 0.1mm~0.2mm and a calorific value of 6000J/g or a molybdenum wire with 7566J/g. 5.6 Lens wiping paper. Measure the heat of combustion before use, take 3 to 4 sheets of paper, group them tightly, weigh them accurately, put them in a burning dish, and measure them according to conventional methods. Calorific value, take the average of the three results as the calorific value of lens cleaning paper.

6 Equipment

6.1 Oxygen Bomb Calorimeter 6.1.1 The oxygen bomb calorimeter consists of a combustion oxygen bomb, an inner cylinder, an outer cylinder, agitator, water, temperature sensor, sample ignition device, temperature measurement and control system. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39996-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39996-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 39996-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39996-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.