|
US$319.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 1039-2020: (Sampling and sample preparation method of imported and exported ton packaging silicon carbide)
Status: Valid SN/T 1039: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 1039-2020 | English | 319 |
Add to Cart
|
4 days [Need to translate]
|
(Sampling and sample preparation method of imported and exported ton packaging silicon carbide)
| Valid |
SN/T 1039-2020
|
| SN/T 1039-2002 | English | 319 |
Add to Cart
|
3 days [Need to translate]
|
Method for the sampling and sample preparation of silicon carbide packed in metricton bags for import and export
| Obsolete |
SN/T 1039-2002
|
PDF similar to SN/T 1039-2020
Standard similar to SN/T 1039-2020 GB/T 4472 GB/T 3143 SN/T 1037 SN/T 4239 Basic data | Standard ID | SN/T 1039-2020 (SN/T1039-2020) | | Description (Translated English) | (Sampling and sample preparation method of imported and exported ton packaging silicon carbide) | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G00;G09 | | Classification of International Standard | 71.040.99 | | Word Count Estimation | 15,171 | | Date of Issue | 2020-08-27 | | Date of Implementation | 2021-03-01 | | Older Standard (superseded by this standard) | SN/T 1039-2002 | | Regulation (derived from) | General Administration of Customs Announcement No. 98 [2020] | | Issuing agency(ies) | General Administration of Customs | SN/T 1039-2020: (Sampling and sample preparation method of imported and exported ton packaging silicon carbide)
---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.
Method for the sampling and sample preparation of silicon carbide-
Packed in metricton bags for import and export
The People's Republic of China Entry-Exit Inspection and Quarantine Industry Standards
Replace SN/T 1039-2002
Sampling and sample preparation method of imported and exported ton packaging silicon carbide
2020-08-27 released
2021-03-01 implementation
Issued by the General Administration of Customs of the People's Republic of China
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces SN/T 1039-2002 "Method for Sampling and Sample Preparation of Imported and Exported Tons of Packaging Silicon Carbide".
Compared with SN/T 1039-2002, the main technical changes of this standard are as follows.
-Edited changes to the text in "1 Scope" and "2 Normative Reference Documents";
-Amend "ton packaging" in "Scope 1" to "ton bag packaging";
- In "2 Normative Reference Documents", delete the standard year;
--In "Table 1", "The minimum number of copies should be taken" is added to the header;
-Add two notes in "Table 1";
--In "Table 3", the unit of "incremental shovel volume" is changed from mL to cm3;
- Edited the "4.3.1" formula part;
--Edited the "5.3" part.
This standard was proposed and managed by the General Administration of Customs of the People's Republic of China.
Drafting organizations of this standard. Yinchuan Customs of the People's Republic of China and Shanghai Customs of the People's Republic of China.
The main drafters of this standard. Xiao Qian, Zhang Kun, Sun Pubing, Wang Changjian, Liu Wenli, Li Zhuyan.
The previous editions of the standard replaced by this standard are as follows.
Sampling and sample preparation method of imported and exported ton packaging silicon carbide
1 Scope of application
This standard specifies the method for sampling and particle size determination of imported and exported ton-bag-packaged silicon carbide.
This standard applies to the extraction and preparation of samples for the determination of chemical composition, moisture and particle size of silicon carbide packaged in large bags.
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.2007.1 General Rules for Sampling and Sample Preparation of Bulk Mineral Products Manual Sampling Method
GB/T.2007.2 General Rules for Sampling and Sample Preparation of Bulk Mineral Products Manual Sample Preparation Method
GB/T.2007.7 General Rules for Sampling and Sample Preparation of Bulk Minerals
GB/T 4891 Method for selecting sample size for estimating average batch (or process) quality
GB/T 6679 General Rules for Sampling of Solid Chemicals
GB/T 13732 General Rules for Sampling Inspection of Bulk Materials with Uniform Granularity
3 General rules
3.1 This standard stipulates that the total accuracy βsdm is ±0.6%, and the sampling accuracy βs is ±0.4%; the accuracy is verified based on the silicon carbide content
See Appendix A.
3.2 If the quality is obviously uneven, the package difference is greater than 2%, the maximum particle size exceeds the specified or mixed with foreign impurities, it should be processed and re-organized.
sampling.
3.3 The equipment, tools and sample container used for sampling and sample preparation should be kept clean, strong and durable.
3.4 The analysis samples should be kept properly, and the storage time should generally not be less than 6 months for inspection.
4 sampling
4.1 Overview
Quantitatively packaged silicon carbide is generally 60 t as an inspection lot. Sample packages are randomly selected according to the number specified in Table 1.The specific sampling method is as per 4.5
Require execution. 5% of each batch can be poured randomly, and 0.5 kg samples are randomly sampled from the middle and lower parts with a sampling shovel, and the rest is carried out according to regulations. If not
Enough for one inspection lot, less than 30 t (ton packaging), use the bag-by-pack sampling method; if the particle size is not uniform, use the upside-down three-shovel method;
For degrees below 10 mm, use the skewer diagonal method. Refer to Appendix A for examples of quality fluctuation evaluation, and refer to the appendix for the accuracy calibration method.
Record B.
Note 1.SW is quality fluctuation.
Note 2.Sampling package by package for less than 30 bags per ton.
4.2 Sampling tools
4.2.1 Sampling shovel. a clean shovel with a volume of about 125 cm3.See GB/T.2007.1 for specific dimensions.
4.2.2 Sample drill. made of stainless steel with φ15 mm×500 mm (φ30 mm×750 mm).
4.2.3 Sample container with lid or clean plastic bag.
4.3 Number of incremental samples (number of sampling packages)
4.3.1 The minimum number of copies should be taken as shown in Table 1.
4.3.2 Sampling of 50 kg packaging can be carried out according to GB/T 6679.The number of copies (N1) of different batches is calculated according to formula (1).
4.4 Incremental sample size
4.5 Sampling method
4.5.1 Packet-by-packet sampling method
Sampling with a sampling shovel, take approximately 0.5 kg aliquots from 30 cm to 50 cm below the mouth of the bag. Sampling with a sampling drill, which is completely diagonal from the mouth of the package
Insert, rotate the skewer 180, take about 0.5 kg sample.
4.5.2 Three shovel method
According to the type of batch and quality fluctuation (see appendix B), sample packages are randomly selected according to the number of copies specified in Table 1, and the packages are poured in a neat and tidy state.
On a clean iron plate or concrete floor, forming a cone shape, insert the sample shovel into the center of the circle from the three busbars of the outer ring of the cone bottom at an angle of 120°, and then
Lift up vertically to take a total of 3 scoops, each bag totaling 0.5 kg.
4.5.3 Skewer diagonal method
Randomly draw sample packets according to the number of incremental samples specified in Table 1, open the bag mouth and insert the skewer diagonally from the top, and rotate the skewer.
180°, take out about 125 g of the sample, and take a total of about 250 g of partial sample on the second skewer.
4.5.4 Sample storage
The moisture sample should be placed in a clean and sealed container, and the moisture content should not change before the measurement.
5 Sample preparation
5.1 Sample preparation tools
5.1.1 Sampling shovel (same size as 5.2).
5.1.2 Jaw crusher. SP100 mm×60 mm.
5.1.3 Sealed oscillating grinder.
5.1.4 Divider (see GB/T.2007.2 for specifications).
5.1.5 Sample shovel and baffle.
5.1.6 White iron surface mixing table or rubber plate surface mixing table.
5.1.7 Magnet. 10 N~15 N magnetic force.
5.1.8 Sample holder. 900 mm×450 mm×100 mm (0.8 mm ordinary steel plate).
5.1.9 Brush.
5.1.10 Wide-mouth glass bottle with frosted stopper (capacity about 100 mL).
5.1.11 Sample sieve.
5.2 Sample preparation procedure
The water and analysis samples can be prepared simultaneously or separately according to the procedure shown in Figure 1 as needed.
5.3 Reduction method
One or several of the following methods can be used in combination.
a) Divider reduction method. execute according to GB/T.2007.2.
b) Grid reduction method. implemented in accordance with GB/T.2007.2.The sample thickness shall be executed according to Table 3.
c) Four-division method. According to GB/T.2007.2.
5.4 Sample container and label
The analysis sample should be placed in a matte stopper jar or a closed container and attached with a label. The following items are indicated on the label.
a) Number;
b) Product name, grade, category, and place of origin;
c) Number (quality). bag (t);
d) Sampling and sample preparation personnel;
e) Sampling, sample preparation location, date and weather.
6 Determination of particle size
6.1 General rules for sampling
Quantitatively packaged silicon carbide is generally 60 t as an inspection lot. Randomly select sample packets according to the number of samples specified in Table 4, and use a sampling shovel to separate the bags
From 30 cm to 50 cm below the mouth, take approximately 1 kg of incremental samples. At the same time, take 10% bags from the number of samples specified above, from each bag
Take about 1 kg of the lower part of the sample. If a sampling skewer is used for sampling, insert it into the bag diagonally from the mouth of the bag and rotate it 180° to take about 0.5 kg increments.
If there is not enough one inspection lot and less than 30 t (ton packaging), the sampling method can be selected package by package; if the particle size is not uniform, three shovel can be selected
Method; if the particle size is below 10 mm, you can choose the diagonal of the skewer...
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 1039-2020_English be delivered?Answer: Upon your order, we will start to translate SN/T 1039-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of SN/T 1039-2020_English with my colleagues?Answer: Yes. The purchased PDF of SN/T 1039-2020_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+ countriesQuestion 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 [email protected]. 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. Question 5: Should I purchase the latest version SN/T 1039-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version SN/T 1039-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|