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GB/T 6646-2008: Chrysotile asbestos test methods
Status: Valid GB/T 6646: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 6646-2008 | English | 459 |
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4 days [Need to translate]
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Chrysotile asbestos test methods
| Valid |
GB/T 6646-2008
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| GB/T 6646.1-1986 | English | 199 |
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2 days [Need to translate]
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Method for dry classification of chrysotile asbestos fibre
| Obsolete |
GB/T 6646.1-1986
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PDF similar to GB/T 6646-2008
Basic data | Standard ID | GB/T 6646-2008 (GB/T6646-2008) | | Description (Translated English) | Chrysotile asbestos test methods | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q61 | | Classification of International Standard | 73.080 | | Word Count Estimation | 20,219 | | Date of Issue | 2008-08-20 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 6646.1-1986; GB/T 6646.2-1986; GB/T 6646.3-1986; GB/T 6646.4-1986; GB/T 6646.5-1986; GB/T 6646.6-1986; GB/T 8073-1987 | | Quoted Standard | GB/T 6003.1; GB 8072 | | 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 determination of dry matter content classification method and inclusion of chrysotile asbestos products, wet classification method, rapid wet classification method, specific surface area measurement methods, grit and determination of chrysotile asbestos did not release the content of the method, moisture determination method, loosen cotton determination method, fines content rapid determination method, bulk density determination, measuring sand content methods. This standard applies to local election chrysotile product quality testing. Others can also refer to the use of mineral fibers. | GB/T 6646-2008: Chrysotile asbestos test methods---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.
Chrysotile asbestos test methods
ICS 73.080
Q61
National Standards of People's Republic of China
Replacing GB/T 6646.1 ~ 6646.6-1986, GB/T 8073-1987
Asbestos Test Method for Isothermal
Posted 2008-08-20
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 6646.1-1986 "chrysotile fibers dry classification method", GB/T 6646.2-1986 "chrysotile fiber length
Of wet classification method ", GB/T 6646.3-1986" chrysotile fiber length rapid wet classification method ", GB/T 6646.4-1986" Wen
Determination of asbestos than the surface area ", GB/T 6646.5-1986" grit and determination in the undissociated chrysotile asbestos content "
GB/T 6646.6-1986 "chrysotile Moisture Determination", GB/T 8073-1987 "Determination of wet asbestos release of" Seven
standard.
This standard is compared with the above criteria, this standard is mainly the following modifications.
--- The above seven standards into one standard;
--- Increase the quality test sieve sieve;
--- Increase the quality requirements of the test water;
--- Increased the amount of fines rapid determination method;
--- Increased sand content determination method;
--- Increasing the bulk density determination.
The Standard Appendix A, Appendix B are informative appendices.
The standard proposed by China Building Materials Industry Association.
The standard and non-metallic mineral products by the National Standardization Technical Committee (SAC/TC406) centralized.
This standard was drafted. Xianyang Institute of non-metallic minerals.
The main drafters of this standard. Tan Dongping, Jisheng.
The standard standard replaces the previous editions.
--- GB/T 6646.1-1986;
--- GB/T 6646.2-1986;
--- GB/T 6646.3-1986;
--- GB/T 6646.4-1986;
--- GB/T 6646.5-1986;
--- GB/T 6646.6-1986;
--- GB/T 8073-1987.
Asbestos Test Method for Isothermal
1 Scope
This standard specifies the dry classification method for the determination and inclusion of chrysotile asbestos products, wet classification method, rapid wet classification method,
The specific surface area determination, grit and determination not release chrysotile content method, moisture determination, release cotton determination method, amount of fines
Rapid Determination, grit determination method, bulk density determination.
This standard applies to the election machine chrysotile product quality testing. Other mineral fibers can also refer to adopt.
2 References
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 6003.1 Test sieves of metal wire cloth
GB 8072 chrysotile asbestos sampling and sample preparation method
3 General requirements
3.1 In addition to dry classification methods, other test methods used in the screen shall comply with GB/T 6003.1 requirements.
3.2 All the test water, the water temperature are 11 ℃ ~ 31 ℃, the water must not contain visible sand, impurities and float.
Test Method 4
4.1 dry classification method for the determination and inclusion
4.1.1 equipment and instruments
a) chrysotile fibers Sieve. Model F500-Ⅰ; Speed. 300r/min; mesh sieve aperture and wire diameter are shown in Table 1.
Table 1 F500-I-type mesh sieve classification requirements in millimeters
Project First level Second level Third level
Sieve aperture 12.5 × 12.5 4.75 × 4.75 1.40 × 1.40
Screen wire diameter 2.65 ± 0.04 1.6 ± 0.02 1.18 ± 0.015
b) balance. load is not less than 1000g, dividing the value of not more than 1.0g one;
Load is not less than 50g, dividing the value of not more than 0.01g one;
c) tweezers.
4.1.2 Sample Preparation
GB 8072 prepared by two samples of 500g. Water samples shall not exceed 3%, if exceeded, according to the standard 4.6 drying.
4.1.3 Test procedure
4.1.3.1 Adjustment of chrysotile fibers Sieve counter, so that the final result is 600r ± 0.5r.
4.1.3.2 The order placed on a screen by screen box frame. It should ensure that lined the upper and lower sets of positive.
4.1.3.3 The sample is placed in a container with GB 8072 in blenders conditioning to fully loose. Along the longitudinal direction evenly into the screen box sieve
Box.
4.1.3.4 cover screen cover, tighten the hand wheel.
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