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GB/T 21877-2015: Dyestuffs and intermediate of dyes -- Determination of tapping density
Status: Valid GB/T 21877: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21877-2015 | English | 109 |
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Dyestuffs and intermediate of dyes -- Determination of tapping density
| Valid |
GB/T 21877-2015
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| GB/T 21877-2008 | English | 199 |
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2 days [Need to translate]
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Dyestuffs and intermediate of dyes -- Determination of tapping density
| Obsolete |
GB/T 21877-2008
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PDF similar to GB/T 21877-2015
Basic data | Standard ID | GB/T 21877-2015 (GB/T21877-2015) | | Description (Translated English) | Dyestuffs and intermediate of dyes -- Determination of tapping density | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G55 | | Classification of International Standard | 71.100.01; 87.060.10 | | Word Count Estimation | 5,591 | | Date of Issue | 2015-05-15 | | Date of Implementation | 2015-12-01 | | Older Standard (superseded by this standard) | GB/T 21877-2008 | | Regulation (derived from) | National Standard Announcement 2015 No. 15 | | Issuing agency(ies) | General Administration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 method for determination of dyes and dye intermediates bulk density. This Standard applies to dyes and dye intermediates stacked density determination. | GB/T 21877-2015: Dyestuffs and intermediate of dyes -- Determination of tapping density---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.
Dyestuffs and intermediate of dyes. Determination of tapping density
ICS 71.100.01; 87.060.10
G55
National Standards of People's Republic of China
Replacing GB/T 21877-2008
Determination of dyes and dye intermediates bulk density
Issued on. 2015-05-15
2015-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 21877-2008 "dyes and dye intermediates Determination of bulk density", and GB/T 21877-2008 phase
Ratio, in addition to editorial changes outside the main technical changes are as follows.
--- Increased loose bulk density, and tap bulk density of the definition (see 2.2, 2.3);
--- Increased the determination of loose bulk density (see 4.1).
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee Dye (SAC/TC134) centralized.
This standard was drafted. Ou Yancheng Chemical Industry Co., dye State Quality Supervision and Inspection Center, Shenyang Chemical Research Institute have
Limited.
The main drafters of this standard. Zhao, Yang Jiemin, Shen Jiong day.
This standard replaces the standards previously issued as follows.
--- GB/T 21877-2008.
Determination of dyes and dye intermediates bulk density
1 Scope
This standard specifies the method for determination of dye and dye intermediates bulk density.
This standard applies to dyes and dye intermediates bulk density determination.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1
Bulk density bulkdensity
The sample was placed in a container, after the filling is completed the measured mass per unit volume.
The bulk density can be divided into loose bulk density, and tap bulk density.
2.2
Loose bulk density loosebulkdensity
Including inside and outside the pores of the particles and the particles having an average density of loose granular packs voids, with accumulation in a natural state without the tap
The total mass of particulate material divided by the total volume of the bulk material is obtained.
2.3
Tap bulk density tapbulkdensity
By the average density of the tap after particle packing body, not including inner and outer pores of the particles and particle voids.
3 devices and materials
Devices and materials include the following.
a) measuring cylinder. 100mL;
b) the funnel;
c) frame plate Drug balance. a sense of not more than 0.01g;
d) a rubber hammer.
4 Determination
4.1 Determination of loose bulk density
The sample was poured into a number of conical funnel, the latch to open the sample to naturally flow down, is collected in a container of known volume, then
After Calibrating material weighed. Depending on the quality of the material, to calculate the mass per unit volume.
4.2 Determination of tapped bulk density
The cylinder weighed after washing to dry naturally, and then the sample was loaded into the 100mL graduated cylinder lightly with a rubber hammer to gently tap the bottom, and then
Add the sample volume times continue tapping, until the sample just 100mL full scale, called quality.
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