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GB/T 2547-2008: Plastic resins -- Sampling
Status: Valid GB/T 2547: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 2547-2008 | English | 279 |
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Plastic resins -- Sampling
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GB/T 2547-2008
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| GB/T 2547-1981 | English | RFQ |
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Plastic resins--Sampling
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GB/T 2547-1981
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PDF similar to GB/T 2547-2008
Basic data | Standard ID | GB/T 2547-2008 (GB/T2547-2008) | | Description (Translated English) | Plastic resins -- Sampling | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.01 | | Word Count Estimation | 12,162 | | Date of Issue | 2008-08-04 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 2547-1981 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the use of a sample size to confirm the principle of mathematical statistics. Plastic material and extraction methods using the test method of random samples. How to extract some products from a number of plastic material products of this standard is intended to guide the composition of a representative sample of sampling. | GB/T 2547-2008: Plastic resins -- Sampling---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.
Plastic resins.Sampling
ICS 83.080.01
G31
National Standards of People's Republic of China
Replacing GB/T 2547-1981
Plastic sampling method
Posted 2008-08-04
2009-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 2547-1981 "plastic resin sampling method."
This standard and GB/T 2547-1981 differences.
--- Modify the standard name.
The Standard Annexes A and B are normative appendix.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee of plastic (SAC/TC15) centralized.
This standard was drafted. Beijing Yanshan Branch Institute of China Petrochemical Resin, synthetic resin National Quality Supervision and Inspection Center, Guangzhou
State Institute of Materials Co., Ltd., the National Chemical Building Materials Testing Center (Materials Testing Division), Guangzhou Blonde Technology Co., Ltd.
The main drafters of this standard. Chen is willing, Wang Jiandong, Wanghao Jiang, Wang Xiaoli, Yang Chunmei, Pan Ying, Liu Qixiang.
This standard replaces the previous standard release case. GB/T 2547-1981.
Plastic sampling method
1 Scope
This standard specifies the use of the principle of mathematical statistics confirm the sample size, and extract plastic materials testing method uses a random sample method.
How to extract some of the products from a number of products in plastic material when this standard is intended to guide the composition of a representative sampling test samples.
2 to determine the sample size
2.1 determine the form of the sample
In order to estimate the overall quality of the product obtained sample mean can reflect the real situation of overall satisfaction, the need to strike a proper overall
The amount of sampling units (ie the minimum package). Sampling Units (ie, sample) by equation (1) is obtained.
Shape = (Aσ0/E) 2 (1)
Where.
--- Like the number of sampling units that sample size;
Standard deviation σ0 --- overall quality of the estimates;
E --- estimate of the overall quality of the product obtained by the sample mean and the same methods of measurement products for each sampling unit
Between the overall quality of the average maximum permissible error;
A --- probability coefficient, which represents the estimated value obtained from the sample mean and the overall quality measure for each sampling unit obtained
The error has existed between the average overall quality exceed the maximum permissible error corresponding probability of E.
By the formula (1) may be converted into the formula (2), and sometimes more convenient to use.
Where.
--- Like the number of sampling units that sample size;
Vp 0 --- σ0/Qin X overall product quality variation coefficient estimates, which Qin X average of overall product quality;
2.2 σ0 or V0 Biographies
σ0 or V0 Biographies are as follows.
a) based on historical data of the same product, respectively, with the formula (3) and (4) to calculate the sample size of the sample batches equal or similar products
The standard deviation or coefficient of variation.
Vp '= Ju/Sang X (4)
Where.
Ju --- standard sample batch difference;
X0 i --- single measurement value;
Yan x0 --- the arithmetic mean of the individual measured values;
Like '--- sample size batches;
Vp '--- batch coefficient of variation.
Then, the average value thereof is calculated.
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