This standard is published for the first time. This standard specifies a method for determining the flash point of paints, varnishes, paint bases, solvents, petroleum or related products. This standard is not applicable to the determination of water-based coatings, for which the method of ISO 3679 may be used. This standard is equivalent to ISO 1523:2002 "Determination of Flash Point - Closed Cup Balance Method" (English version). GB/T 21775-2008 Determination of Flash Point - Closed Cup Balance Method GB/T21775-2008 Standard download decompression password: www.bzxz.net
This standard is published for the first time. This standard specifies a method for determining the flash point of paints, varnishes, paint bases, solvents, petroleum or related products. This standard is not applicable to the determination of water-based coatings, for which the method of ISO 3679 may be used. This standard is equivalent to ISO 1523:2002 "Determination of Flash Point - Closed Cup Balance Method" (English version).
This standard is equivalent to ISO1523:2002 "Determination of Flash Point by Closed Cup Balance Method" (English version).
Appendix A of this standard is an informative appendix.
This standard is proposed and managed by the National Technical Committee for Standardization of Hazardous Chemicals Management (SAC/TC251). The
responsible drafting unit of this standard: Marine Chemical Research Institute.
Participating drafting units of this standard: Jiangsu Entry-Exit Inspection and Quarantine Bureau, Sinochem Chemical Standardization Research Institute, Shanghai Entry-Exit Inspection and Quarantine Bureau, China National Chemical Construction Corporation Changzhou Paint Chemical Research Institute.
Main drafters of this standard: Qian Suhua, Qian Yemiao, Wang Xiaobing, Jiang Wei, Gao Yuxuan, Zhang Min, Shen Sujiang. This standard
is published for the first time.
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard.
GB/T3186-2006 Sampling of paints, varnishes and raw materials for paints and varnishes (ISO15528:2000, IDT)
GB/T20777-2006 Inspection and preparation of paint and varnish specimens (ISO1513:1992, IDT)
ISO2719 Determination of flash point of petroleum products and lubricating oils - Pensky-Marens closed cup method
ISO3170 Manual sampling of petroleum liquids
ISO3171 Automatic pipeline sampling of petroleum liquids
ISO13736 Determination of flash point of petroleum products and other liquids - Abel closed cup method
ASTM D56 Standard method for determination of flash point using Tag closed cup tester
DIN51755 Determination of flash point of mineral oils and flammable liquids - Abel-Pensky closed cup method

ICS13.300
National Standard of the People's Republic of China
GB/T 21775—2008/ISO 1523:2002 Determination of flash point
Closed cup equilibrium method
Determination of flash point--Closed cup cguilibrium method(1S01523:2002,IDT)
Issued on 2008-05-12
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on 2008-09-01www.bzxz.net
This standard is equivalent to IS015232002 Determination of % flash point Appendix A of this standard is an informative record. GB/T21775—2008/1SO1523:2002 Closed Cup Method (English Version). This standard was proposed and managed by the National Technical Committee for Standardization of Hazardous Chemicals Management (SAC/TC25I). The responsible drafting unit of this standard is the Marine Chemical Industry Research Institute. The drafting units of this standard are: Jiangsu Exit-Entry Inspection and Quarantine Bureau, Sinochem Chemical Standardization Research Institute, Tuhai Exit-Entry Inspection and Quarantine Bureau, Changzhou Coatings Chemical Research Institute of China National Chemical Construction Corporation. The drafters of this standard are Qian Suhua, Qian Yemiao, Wang Xiaobing, Kui Wei, Gao Yu, Zhang Min, Shen Sujiang. This standard is published for the first time.
1 Scope
GB/T217/5—2008/IS01523:2002 Determination of flash point, closed cup equilibrium method
This standard specifies a method for determining the flash point of paints, varnishes, paint bases, solvents, petroleum or related products. This standard is not suitable for the determination of water-based coatings. The determination of water-based coatings can be based on the method of S357. The applicable temperature range of this standard varies depending on the instrument used, from -30°C to 110°C (see table). The results obtained with mixed solvents containing halogenated hydrocarbons should be noted, because these mixed solvents may produce irregular results. 2 Normative references
The clauses in the following documents shall become the clauses of this standard from the date of reference. For the referenced documents with a valid date, all subsequent amendments (excluding errors) or revisions shall not be applicable to this standard. However, the parties to an agreement reached under this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced documents, the latest versions shall apply to this standard. GB/T3185--2006 Sampling of raw materials for paints, lacquers and varnishes (TSO5528: 2006, 1IDT) GB/T20777--2006 Inspection and preparation of paint and varnish samples (IS01513: 1992, JDT) ISO2719 Determination of flash point of petroleum products and lubricating oils Pensky-Marena closed cup method ISO3175 Manual sampling of stone pool liquids ISO3L71 Automatic pipeline sampling of stone pool liquids ISO13736 Determination of flash point of petroleum products and other liquids Abel closed cup method ASTMD56 Standard method for determination of flash point with tag reading tester DIN51755 Abel-Prrisky closed cup method for determination of flash point of mineral oils and flammable liquids 3 Terms and Definitions The following terms and definitions apply to this standard. 3.1
Flashpoint
Under the specified test conditions, the ignition source is ignited so that the vapor of the test sample burns and spreads on the surface. The lowest flash temperature of the test sample under the atmospheric pressure calibrated to 101.3ePa is the flash point. 4 Principle
4.1 The test sample is placed in a closed cup buried in a heating pool. The temperature of the heating pool should be gradually increased so that the temperature difference between the liquid in the heating pool and the temperature of the test sample in the cup does not exceed 2℃, and the temperature increase rate of the test sample does not exceed 0.5℃ every 1.5min. 4.2 During the heating period, the time interval between ignitions is at least 1.5min. Record the lowest temperature during the internal ignition. 5 Chemical reagents
5.1 Cleaning solvents and remove the residues of the previous test sample on the test cup and cover. Note: The choice of solvent should be determined based on the materials of the previous test and the residual strength of the residues. Selective aromatic (non-extractable) solvents can be used to remove oils. Mixed solvents such as methyl-acetone-methanol can effectively remove colloidal substances. 5.2 Calibration liquids, see Note A.
6 Receivers
6.1 Test cup and cover; closed cup, equipped with built-in level indicator and cup cover. GB/T21775-2008/ISO1523:2002
or the test cup should be tightly combined with the cover, the cover can be moved, so that the ignition device can be used. When the sliding part is opened, an ignition zone with a true diameter of 3 mm to 4 mm is set near the center of the cover. When ignited, the top of the ignition device should be located between the upper and lower planes of the cover, and expand radially from the center of the open part. The instrument should be designed to ensure that the ignition test process: opening the sliding cover, placing and removing the nozzle, closing the cover is completed within 2s to 3s. As long as these requirements are met, a machine-driven instrument can also be used. For example: the fire source in the ignition device can be any suitable combustible gas. 6.2 Test thermometer, suitable for test cup, in accordance with the standard provisions listed in Table 1. Note that other types of temperature testers listed in Table 1 can also be used as long as the accuracy meets the requirements and meets the standard provisions listed in Table 1. Table 1 Applicable temperature range
Standard test method
150 2719 Pensky-Me
ens method
1SQ13736
DIN 5175
6.3 Heat pool, containing suitable
6.4 Heating pool thermometer
6.5 Support, design support
nsky method
good falling body, its square
cup mixing
heating/cooling
liquid directly
correct use of Albert certification
thermometer:
2 optional device,
sea,
heat rise rate in the test cup
see
(6. Sand has
ground|| |tt||The temperature range/|tt||capacity of the liquid in the heating/cooling pool on the upper part of the cover can meet the requirements of 10.10.
Measurement of the test temperature quality.
The horizontal test immersion person and the heating/cooling pool are on the same water surface.
Figure 1 illustrates how to
GB/T 21775-—2008/LSO 1523:20026.6 Barometer, accurate to 0.1
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