GB/T 7909-2017 English PDF

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GB/T 7909-2017: Wood chips for pulp
Status: Valid

GB/T 7909: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7909-2017	199	Add to Cart	3 days	Wood chips for pulp	Valid
GB/T 7909-1999	199	Add to Cart	2 days	Wood chips for the pulp	Obsolete
GB/T 7909-1987	RFQ	ASK	3 days	Wood chips for the pulp	Obsolete

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Basic data

Standard ID: GB/T 7909-2017 (GB/T7909-2017)
Description (Translated English): Wood chips for pulp
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B69
Classification of International Standard: 79.080
Word Count Estimation: 10,137
Date of Issue: 2017-12-29
Date of Implementation: 2018-07-01
Older Standard (superseded by this standard): GB/T 7909-1999
Regulation (derived from): National Standards Bulletin 2017 No. 32
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

GB/T 7909-2017: Wood chips for pulp

---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.
Wood chips for pulp ICS 79.080 B69 National Standards of People's Republic of China Replacing GB/T 7909-1999 Paper chips 2017-12-29 Posted 2018-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 7909-1999 "paper chips." This standard compared with GB/T 7909-1999, the main technical changes are as follows. --- Added terms and definitions (see Chapter 3); --- Removed Table 1 (see 4.1); --- Increasing the screening device technical requirements (see 4.2); --- Modify the qualified wood size and the size of the remaining layers of the sieve ratio (see Table 1); --- Modify the classification (see Table 2); --- Modify the determination of the proportion of the remaining layer of wood chips (see 5.2); --- Increasing the determination of non-wood impurities (see 5.5); --- Modify the absolute moisture content of wood, the determination of relative moisture content (see 5.6); --- Increasing the inspection rules (see Chapter 7); --- Modify the logo, packaging, transportation and storage (see Chapter 8). This standard proposed by the State Forestry Administration. This standard by the National Wood Standardization Technical Committee (SAC/TC41) centralized. This standard was drafted unit. Heilongjiang Institute of Timber Science, Northeast Forestry University, Hainan Jinhai Pulp and Paper Co., Ltd., Inner Mongolia Daxing Anling Pulp & Paper Co., Ltd., San Fa Wood Co., Ltd. The main drafters of this standard. Zhou Zhifang, Zhang Jing, Wang Qi, He Jincun, Cui Hongzhu, Zhao Dan, Zhang Dongmei, Huang Haibing, Zhao Simiao, Li Chenqi, Bai Xue, Mao Lei, Xu Rui, Shen Jing, Wang Haigang, Wang Hongdi, Yu Hongliang, Chai Shun, Xing Zhenhai, Xiao Hui Bo, Zhou Yu, Chen Xingyao, Lv Lei, Wang Chunming, Mao Lei, Gao Zhencheng. This standard replaces the standards previously issued as. --- GB/T 7909-1987, GB/T 7909-1999. Paper chips

1 Scope

This standard specifies the terms and definitions of papermaking chips, requirements, test methods, the number of calculations, inspection rules and signs, packaging, transportation and Storage and other content. This standard applies to the production of pulp and wood production and distribution areas.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. LY/T 1794-2008 wood-based panel

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 With wood as raw material, obtained by mechanical processing of a certain size papermaking pulp and paper. 3.2 Vibration measurement sieve mechanicalsieveshaker A screening device that can set a plurality of sieve plates with different mesh sizes and mechanically vibrate the sieve device. 3.3 Screen survival rate of wood chips weightpercentofacertainscreentray The percentage of the mass of chips present on the sieve plate in one layer of the sieve is the percentage of the total mass of the chips before sieving. 3.4 Qualified wood ratio weightpercentratioofacceptchips Samples were taken according to the provisions of screening, retained in the diameter of 4.8mm, 9.5mm, 22.2mm and 28.6mm sieve on the sieve retention wood Film ratio and the sum. 3.5 Acceptable chip acceptchips Wood chip size, each screen layer to maintain the rate of wood chips to achieve the required classification and rank wood chips at least third class. 3.6 Wood shavings fines The fine wood impurities on the last sieve of the sieve are measured by shaking. 3.7 Burning wood chips burnedchips Use the wood that has been ignited by the open flame or burnt by high temperature to produce a mild carbonization reaction. ......

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