WARNING - The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This standard specifies a procedure for the determination of flash and fire points of petroleum products using the Cleveland open cup apparatus. It is applicable to petroleum products having an open cup flash point above 79 °C, except fuel oils, which are most commonly tested in according to G/B T 261.
Note: Flash point and fire point are indications of the ability of a substance to form a flammable mixture with air under controlled conditions, and then to support combustion. They are only two of a number of properties that may contribute towards the assessment of overall flammability and combustibility of a material.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 261 Determination of Flash Point - Pensky - Martens Closed Cup Method (GB/T 261-2008, ISO 2719:2002, MOD)
GB/T 514 Specification for Liquid-in-glass Thermometers for Testing of Petroleum Products
GB/T 4756 Petroleum Liquids - Manual Sampling (GB/T 475 6-1998, eqv ISO 3170:1988)
GB/T 6683 Petroleum Products - Determination of Precision Data in Relation to Methods of Test (GB/T 6683-1997, neq ISO 4259:1992)
GB/T 1 5000.3 Directives for the Work of Reference Materials (3) General principles and Statistical Methods for Certification of Reference Materials (GB/T 15000.3-1994, neq ISO Guide Rule 35)
GB/T 15000.7 Directives for the Work of Reference Materials (7) - General Requirements for the Competence of Reference Material Producers (GB/T 15000.7-2001, ISO Guide 34, IDT)
GB/T 1 5000.8 Directives for the Work of Reference Materials (8) - Uses of Certified Reference Materials (GB/T 15000.8-2003, ISO Guide33, IDT).
SY/T 5317 Petroleum Liquid - Automatic Pipeline Sampling (SY/T 5317-2006, ISO 3171:1988, IDT) Petroleum Liquid - Automatic Pipeline Sampling
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1 Flash point
Lowest temperature of the test portion, corrected to a barometric pressure of 101.3 kPa, at which application of a test flame causes the vapor of the test portion to ignite and the flame to propagate across the surface of the liquid, under the specified conditions of test
3.2 Fire point
Lowest temperature of the test portion, corrected to a barometric pressure of 101,3 kPa, at which application of a test flame causes the vapor of the test portion to ignite and sustain burning for a minimum of 5 s under the specified conditions of test.
