GB/T 21790-2008 English PDF

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GB/T 21790-2008: Determination of flash/ no flash -- Rapid equilibrium closed cup method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21790-2008	354	Add to Cart	3 days	Determination of flash/ no flash -- Rapid equilibrium closed cup method	Valid

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Basic data

Standard ID: GB/T 21790-2008 (GB/T21790-2008)
Description (Translated English): Determination of flash/ no flash -- Rapid equilibrium closed cup method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 18,155
Date of Issue: 2008-05-12
Date of Implementation: 2008-09-01
Quoted Standard: GB/T 3186-2006; GB/T 20777-2006; ISO 3170-2004; ISO 3171-1988; ISO 3679-2004
Adopted Standard: ISO 3680-2004, IDT
Regulation (derived from): Announcement of Newly Approved National Standards No. 7 of 2008 (No. 120 overall)
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 a standard test conditions, paint, varnish, paint binders, adhesives, petroleum and related products, in -30��C ~ 300��C temperature range of flammable vapor volatilized by the ability of the test flame ignited in a way. Used in conjunction with a flash point of the detector, the standard fatty acid methyl esters are also suitable non- flash burning flash fire test.

GB/T 21790-2008: Determination of flash/ no flash -- Rapid equilibrium closed cup method

---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.
Determination of flash/no flash. Rapid equilibrium closed cup method ICS 13.300 A80 National Standards of People's Republic of China GB/T 21790-2008/ISO 3680.2004 And non-flashover flashover - Rapid equilibrium closed cup method (ISO 3680.2004, IDT) Posted 2008-05-12 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is identical with ISO 3680.2004 "and non-flashover flashover - Rapid equilibrium closed cup method" (in English). The Standard Appendix A and Appendix B are normative, Appendices C and D are informative appendices. This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points. This standard is drafted by. People's Republic of China Shanghai Entry-Exit Inspection and Quarantine Bureau. Participated in the drafting of this standard. People's Republic of China Hubei Exit Inspection and Quarantine, Shenzhen People's Republic of China Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. Jiang Wei, Chen Xiang, Wanghai Ting, Zhu Hongkun, Cui Hairong, Guo Jian, Liu Zhihong, Wu Jingwu, Zhou Yun, Zhao Yi Ching. This standard is the first release. GB/T 21790-2008/ISO 3680.2004

Introduction

This standard describes two closed cup equilibrium method in one, for the determination of paints, varnishes, paint binders, solvents, adhesives, oil and its phase Flashover flashover performance and non-off products. When balancing method to choose a closed cup test required in combination with another method, see GB/T 21792 "flashover flashover determination and non-equilibrium closed cup method" (see reference [4]). When connecting the flash point detector (see A.1.6), This standard is also suitable for fatty acid methyl ester (FAME) fuel and non-flash flash fire assay. In this standard and GB/T 21792, the test is only a mixture of air and vapor at the top of the product in the test product and the test vessel At a temperature equilibrium state to perform. This test method does not measure the flash point of the product, only to make products at a selected temperature equilibrium to meet storage, transport and use of flammable products Relevant laws or regulations. Therefore, based on this point, there is no need to determine the exact flash point of the product, but it is necessary to determine the product Whether the flash fire at a given temperature. Compared with GB/T 21792 requirements in this standard are described in the instrument can be faster, smaller amount (or the amount of sample was 2mL 4mL) gave similar results. Furthermore, in addition to routine laboratory use, which can be made into a portable instrument to facilitate the real scene Test. Collaborative work (see Ref. [6]) that the use of this procedure results obtained are comparable. The method is tested with a halogenated hydrocarbon When a mixture of solvents, may give abnormal results, its results should be carefully explained (see Ref. [7]). A constant physical and chemical properties of the test substance is not a flash point. They and instrument design and operating conditions of the instrument used in the process Executive Order are closely related. Therefore, only the flash point according to a standard test method to define, and not described in detail through the use of this standard The results with different test methods or instruments available, there is no universally effective correlation between them. GB/T 21790-2008/ISO 3680.2004 And non-flashover flashover - Rapid equilibrium closed cup method

1 Scope

This standard specifies under standard test conditions, paints (including water-based paints), varnishes, paint binders, adhesives, petroleum and related Product within a temperature range of -30 ℃ ~ 300 ℃ by volatile flammable vapor is a way to test the ability to ignite the flame. And a flash point When the detector (see A.1.6) for use with the present standards for fatty acid methyl ester (FAME) fuel and non-flash flashover test.

2 Normative 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 3186-2006 Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528.2000, IDT) GB/T 20777-2006 Paints and varnishes examination and preparation of samples (ISO 1513.1992, IDT) ISO 3170.2004 Liquid petroleum manual sampling method ISO 3171. 1988 Petroleum liquids pipeline automatic sampling ISO 3679.2004 Determination of flash point - Rapid equilibrium closed cup method

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Applications under the specified test conditions of temperature flame, corrected to atmospheric pressure 101.3kPa, to determine whether the test sample vapor instantly Ignited, the flame can spread through the liquid surface. Principle 4 Under the conditions of test temperature, the test to determine the volume of the sample introduced into the sample cup, after a predetermined time, application of the test flame was observed Whether flashover.

5 Reagents and materials

5.1 cleaning solvent A method for cleaning the sample cup and the cup covered with the remaining residue previous test a suitable solvent. Note. The choice of solvent based on previous adhesion ability of the test material and the nature of the residue. Low volatile aromatic solvents (benzene) is applied to remove the residual oil Thereof, and the toluene - acetone - methanol mixed solvent for removing gum deposits. 5.2 Calibration liquid A series of certified reference material (CRM) and/or standard sample (SWS), see Appendix C.

6 Instruments

6.1 Overview Appendix A has been described in the instrument, including the test cup and lid system description, as well as their diameters and special requirements. The inner Yung included in Figure A. 1 to FIG. A. 5. And non-flashover flashover test in the temperature range of -30 ℃ ~ 300 ℃ need more than one instrument. GB/T 21790-2008/ISO 3680.2004 ......

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