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GB/T 3781.5-2019: Acetylene black -- Part 5: Determination of grit content
Status: Valid GB/T 3781.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 3781.5-2019 | English | 199 |
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Acetylene black -- Part 5: Determination of grit content
| Valid |
GB/T 3781.5-2019
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| GB/T 3781.5-2006 | English | 279 |
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Acetylene black -- Part 5: Determination of coarse points
| Obsolete |
GB/T 3781.5-2006
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| GB/T 3781.5-1993 | English | 239 |
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Acetylene black. Determination of grit content
| Obsolete |
GB/T 3781.5-1993
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PDF similar to GB/T 3781.5-2019
Basic data | Standard ID | GB/T 3781.5-2019 (GB/T3781.5-2019) | | Description (Translated English) | Acetylene black -- Part 5: Determination of grit content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G49 | | Classification of International Standard | 83.040.20 | | Word Count Estimation | 10,122 | | Date of Issue | 2019-08-30 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 3781.5-2019: Acetylene black -- Part 5: Determination of grit content---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.
Acetylene black - Part 5. Determination of grit content
ICS 83.040.20
G49
National Standards of People's Republic of China
Replace GB/T 3781.5-2006
Acetylene black - Part 5. Determination of coarse fractions
(ISO 1437.2017, Rubbercompoundingingredients-Carbonblack-
Determinationofsieveresidue, MOD)
Published on.2019-08-30
2020-07-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 3781 "acetylene black" is divided into the following parts.
---Part 5. Determination of coarse fractions;
---Part 6. Determination of apparent specific volume;
---Part 8. Determination of the amount of hydrochloric acid absorbed;
--- Part 9. Determination of resistivity.
This part is the fifth part of GB/T 3781.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 3781.5-2006 "acetylene black black part 5. determination of coarse grain fraction", and GB/T 3781.5-2006
The main technical changes are as follows.
--- Modified the oven control temperature of 105 ° C is 125 ° C (see 4.5, 4.5 of the.2006 edition);
--- Analysis steps have been refined (see Chapter 7);
--- Added the description of "Using a rubber hose to flush the accumulated sample from the periphery of the funnel with a small water flow" (see 7.8).
This section uses the redrafting method to modify the use of ISO 1437.2017 "measurement of rubber compounding agent carbon black sieve residue."
This section has more structural adjustments than ISO 1437.2017. This section is listed in Appendix A with ISO 1437.2017.
The chapter number is compared to the list.
The technical differences between this part and ISO 1437.2017 and their reasons are as follows.
---About the normative reference documents, this part has made specific technical differences to adapt to China's technical conditions, adjustments
The situation is reflected in Chapter 2, “Regulatory Citations”, and the specific adjustments are as follows.
● Replaced with GB/T 6003.1 with international standards and GB/T 3782 and GB/T 8170 with added references.
ISO 1437.2017 (see 4.1, Chapter 6 and Chapter 8);
--- Removed "terms and definitions", with the definition of national standards (see ISO 3437. Chapter 3 of.2017);
--- Added "dryer" for drying the test sieve storage (see 4.6);
--- Added "reagents" to wet the carbon black prior to testing (see Chapter 5);
--- Added "samples", the rules are more comprehensive and clear (see Chapter 6);
--- Modify the sample volume "100g" to "50g", due to the larger volume of acetylene black, increase operability (see 7.5, ISO 1437.2017)
6.2.3);
--- Removed the requirement of precision, because acetylene black has a small coarse fraction and is difficult to handle (see Chapter 8 of ISO 1437.2017);
--- Deleted the formula for the calculation of parts per million, and clearly indicated in the result representation that one test result shall prevail, consistent with the technical indicators.
(See Chapter 8, ISO 1437. Chapter 7 of.2017).
This section has made the following editorial changes.
--- In order to be consistent with China's existing standard series, the standard name was revised;
--- Added Appendix A (informative) "Structural changes in this section compared to ISO 1437.2017".
This part was proposed by the China Petroleum and Chemical Industry Federation.
This part is under the jurisdiction of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35).
This section drafted by. Zhonghao Heiyuan Chemical Research and Design Institute Co., Ltd., Sichuan University of Light Industry.
The main drafters of this section. Wang Cheng, Jin Yongzhong, Deng Yi.
The previous versions of the standards replaced by this section are.
---GB/T 3781.5-1983, GB/T 3781.5-1993, GB/T 3781.5-2006.
Acetylene black - Part 5. Determination of coarse fractions
Cautions - Personnel using this section should have hands-on experience in formal laboratory work. This section does not point out all possible security questions.
question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set by the relevant national regulations.
1 Scope
This part of GB/T 3781 specifies a method for determining the coarse fraction of acetylene black.
This section applies to acetylene black.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 3782 acetylene black
GB/T 6003.1 Test sieves - Technical requirements and testing - Part 1. Wire woven mesh test sieves (ISO 3310-1.2000,
MOD)
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
3 Principle
Control the flow pressure to flush a sample of known mass, pass it through a 150 μm test sieve, dry and weigh the residue left on the test sieve
The mass is the coarse fraction of the sample.
4 instruments
4.1 Water washing sieve residue measuring device. Figure 1 is a schematic diagram of the main components of the instrument. The main components are divided into.
a) Test sieve, made of phosphor bronze or stainless steel, with a pore size of 150 μm, in accordance with GB/T 6003.1.
b) Funnel with test sieve at the bottom.
c) Nozzle, spray clean water under controlled pressure to flush the carbon black through the test sieve.
d) Water pressure regulating device.
e) Water filter, the wire mesh installed on the water supply line, the hole diameter should not be larger than the test sieve.
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