GB/T 386-2021_English: PDF (GB/T386-2021)
| Standard ID | USD | BUY PDF | Lead-Days | Standard Title (Description) | Status |
| GB/T 386-2021 | 609 |
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Standard test method for cetane number of diesel fuel oil
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| GB/T 386-2010 | RFQ |
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Standard test method for cetane number of diesel fuel oil
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| GB/T 386-1991 | 439 |
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Diesel fuels determination of ignition quality by the cetane method
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| Standard ID | GB/T 386-2021 (GB/T386-2021) | | Description (Translated English) | | | Sector / Industry | National Standard (Recommended) |
GB/T 386-2021
Standard test method for cetane number of diesel fuel oil
ICS 75.160.20
CCSE31
National Standards of People's Republic of China
Replace GB/T 386-2010
Determination of Cetane Number of Diesel Fuel
Released on 2021-10-11
2022-05-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Abbreviations 3
5 Principle 3
6 Disturbing factors 4
7 Instruments and equipment 4
8 Reagents and materials 6
9 sample 8
10 Working conditions and standard operating conditions of engines and instruments 8
11 Calibration and engine verification 11
12 Test procedure 12
13 Calculation of Cetane Number 14
14 Results report 15
15 Precision and Bias 15
Appendix A (Informative) Safety Warning 17
Appendix B (informative) Instruments and procedures for preparing standard fuels by volume ratio 18
Appendix C (informative) Physical and chemical properties of some standard fuels 21
Appendix D (informative) Testing the physical and chemical properties of fuel 22
Appendix E (Normative) Instrument Assembly and Installation Instructions 23
Appendix F (informative) Operational technical parameter adjustment 25
References 29
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 386-2010 "Determination of Diesel Cetane Number". Compared with GB/T 386-2010, except for structural adjustment and compilation
In addition to the editorial changes, the main technical changes are as follows.
a) The term "quality control sample" has been added (see 3.6);
b) Amend the term "fire lag time table" to "cetane number table". Added the name and initial use of previous cetane number tables
A description of the number of years (see 3.7, 3.2.1 of the.2010 edition);
c) Added the low cetane component pentamethylheptane as a substitute for heptamethylnonane (see 3.14);
d) "The difference between the cetane number of the two standard fuels is not more than 5.5 units" is changed to "the cetane number of the two standard fuels is not much different."
At 5.6 units" (see 5.2, 4.2 of the.2010 edition);
e) Change the standard fuel "density value at 15.56°C" to "density value at 20°C" (see 7.3.2,.2010 edition 6.3.2);
f) Added Table 2 positive standard fuel technical indicators (see 8.3), Table 3 secondary standard fuel technical indicators (see 8.4) and Table 4 test fuels
Technical indicators (see 8.5);
g) The calculation formula for the cetane number of the mixture of pentamethylheptane and n-hexadecane has been added (see 8.3.3);
h) The requirement for positive standard fuel storage conditions has been added (see 8.3.4);
i) The cetane numbers of T fuel and U fuel were revised to 73~76 and 19~22 respectively (see 8.4.1, 8.4.2, 7.4.1 of the.2010 edition)
7.4.2);
j) Amend "15°C above the cloud point of the fuel" to "14°C above the cloud point of the fuel" (see 8.4.3, 7.4.4 in the.2010 edition);
k) Added sub-standard fuel matching requirements (see 8.4.4);
l) Amend "Sample to be placed for at least a few hours" to "Sample to be placed for at least 2h" (see 9.2, 8.2 of the.2010 edition);
m) The requirements for the minimum temperature of the diesel fuel sample before measurement and filtration are clearly specified (see 9.2);
n) Deleted the description of valve clearance during shutdown and cold state (see 10.3.6, 9.3.6.1 of the.2010 edition);
o) Added content about optimizing gap settings for specific sensors (see 10.3.25);
p) Added related content about correcting engine conditions (see 11.2);
q) Added quality control and quality control tests (see 11.4);
r) Added the preparation method and requirements of the secondary standard fuel for the determination of high cetane number samples (see 12.8, 12.9);
s) Added the requirement that the difference between the cetane number corresponding to two consecutive sets of handwheel readings is not more than 1.4 units (see 12.10);
t) Added the handwheel reading determination sequence diagram of fuel in Figure 3 and Figure 4 (see 12.10);
u) The calculation method of the cetane number of samples whose cetane number is higher than the approved reference value of T fuel has been added (see 13.2.2);
v) Added the content of reporting standard fuels (see 14.2);
w) The description of the measurement deviation between the cetane number control board and the double-reading cetane number table has been added (see 15.2.2).
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed and managed by the National Petroleum Products and Lubricants Standardization Technical Committee (SAC/TC280).
This document was drafted by. China Petroleum & Chemical Corporation Research Institute of Petrochemical Industry.
The main drafters of this document. Wang Li and Xu Feng.
The previous releases of this document and the documents it replaced are as follows.
---GB 386-1964, GB/T 386-1991, GB/T 386-2010;
---This is the third revision.
introduction
The cetane number is a measure of the ignition properties of diesel in a compression ignition engine. It is carried out at a constant speed in a compression ignition test engine.
Determination. Cetane number is widely used in the petrochemical industry, refineries, distributors, and engine production plants, as a fuel and engine corresponding
The main indicators are measured.
The correlation between the performance of the test engine and the engine with full scale, variable speed, and variable load is not yet fully understood. This file is available
It is used for the quantitative determination of cetane number of unconventional fuels, such as synthetic fuels, vegetable oils and similar products. When measuring unconventional fuels,
The relevance of the nature of this oil in the engine is not fully understood.
Determination of Cetane Number of Diesel Fuel
Warning---Personnel using this document should have practical experience in formal laboratory work. The use of this document may involve certain dangerous
This document does not point out all safety issues. The user is responsible for taking appropriate safety, health and environmental protection measures
And ensure compliance with the conditions stipulated by relevant national laws and regulations. See Appendix A for the content of safety warnings.
1 Scope
This document describes the test method for determining the cetane number of diesel fuel with a cetane number tester. The sample is under specific operating conditions by a
The standard single-cylinder, four-stroke, variable compression ratio, intermittent injection diesel engine was tested.
This document is applicable to the quantitative determination of the cetane number of compression ignition engine fuel. The cetane number ranges from 0 to 100, but a typical test
The range is 30~65.
This document is also applicable to the quantitative determination of cetane number of unconventional fuels, such as synthetic fuels, vegetable oils and similar products.
Note. This document adopts the [SI] International System of Units, with English units in parentheses as a reference.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document. For undated reference documents, the latest version (including all amendments) applies to
This document.
GB/T 265 Petroleum products kinematic viscosity determination method and dynamic viscosity calculation method
GB/T 4756 Manual sampling method for petroleum liquids
GB/T 6682-2008 Analytical laboratory water specifications and test methods
GB/T 6986 Determination of Cloud Point of Petroleum Products
GB/T 27867 Petroleum liquid pipeline automatic sampling method
SH/T 0176 Jet fuel peroxide value determination method
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Acceptedreferencevalue
The negotiated standard value used for comparison, which comes from.
a) Theoretical or determined value based on scientific principles;
b) Designated value or certified value based on the test work of a certain country or international organization;
c) According to a recognized value agreed upon by a scientific or engineering organization in a collaborative experiment;
d) When a) b) c) cannot be obtained, the average value of the measurement population is used.
Note. The recognized reference value for the cetane number is understood to be the cetane number of a specific reference material measured under reproducibility conditions.
[Source. GB/T 4016-2019, 2.40.041, with modification]
......
GB/T 386-2010
Standard test method for cetane number of diesel fuel oil
ICS 75.160.20
E31
National Standards of People's Republic of China
Replacing GB/T 386-1991
Cetane number determination
Issued on. 2011-01-10
2011-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
Introduction Ⅴ
1 Scope 1
2 Normative references 1
3 Terms and definitions
SUMMARY 4. Method 4
Disturbances 4 5
6 Equipment 4
7 Reagents and standards 6
Sampling 7 8
9 engine operating conditions and equipment and standard operating conditions 7
10 correction and verification engine 11
Step 11 11 Test
12 Calculation of cetane number 12
Report 13 13
14. Precision and Bias 13
Appendix A (informative) The standard numbering ASTMD613-08 reg reg number table 14
Annex B (informative) Security Warning 19
Annex C (normative) instrument assembly and installation instructions 20
Annex D (informative) blending fuel volume than the standard instrument and step 22
Physical Chemistry Annex E (informative) positive standard fuel properties 25
Physical and chemical properties Annex F (informative) test fuel 26
Annex G (informative) parameter adjustment technique --- 27
Foreword
This revised standard adopts the American Society for Testing and Materials standard ASTMD613-08 "cetane number determination."
This standard redrafted according ASTMD613-08.
In order for our country, the present standard when using ASTMD613-08 been modified. This standard ASTMD613-08
The reg structural difference in Appendix A. The main technical differences between this standard and ASTMD613-08 follows.
--- This standard ASTMD613-08 Chapter 5 of meaning and purpose modification is the introduction, in order to meet the requirements of standards prepared;
--- Chapter 2 of this standard will be revised to reference the standard of the corresponding national standards and industry standards. This standard adds
GB/T 265, GB/T 511, GB/T 1884, GB/T 2430, GB/T 6536, GB/T 6540, SH/T 0234,
SH/T 0236, SH/T 0604, SH/T 0724 standard reference; deleted ASTMD613-08 in ASTMD975,
ASTMD4175, ASTME456, ASTME542, ASTME832 standard reference;
--- The standard Chapter 4 ASTMD613-08 Chapter 4 has been modified. To ensure the accuracy of the test, the sample is increased
In the middle of the range includes two differential standard fuel cetane number of requirements;
--- 7.3.3 This standard increases calculated on the basis on a positive standard cetane number of the fuel mixture, which facilitates easy user computing;
--- 7.3.4 This standard increases on regular fuel quality assurance standards requirements, in order to ensure the accuracy of measurement;
--- The standard 9.1 pairs ASTMD613-08 10.1 installation part of the engine and instruments were modified, mainly deleted
In addition to presentation of the relevant commissioning requirements for engine assembly or after overhaul. Because the content is expressed clearly;
--- The standard delete ASTMD613-08 Figure 3 Sample and standard fuel reading order. Because there are corresponding textual representation
content;
--- The standard delete the description about 13.2 and 13.2.2 cetane ASTMD613-08 calculation. Because the formula (4) is
The calculating expression;
--- The standard ASTM D613-08 removed in FIG. 4 sample cetane number calculation examples. Because there are corresponding textual representation
content;
--- The standard delete ASTMD613-08 15.1.3,15.1.4 and 15.1.5 in the relevant cetane repeatability limit, then
Reproducibility limit deviation of the process and the establishment of provenance. Since its introduction and the actual use of this standard is not directly related;
--- The standard Chapter 16 ASTMD613-08 deleted keyword. Its not the content of the standard;
--- Appendix B of this standard will ASTMD613-08 Appendix A1 warning information changes is an information appendix. Because this is not a standard
Content.
When using this standard ASTMD613-08, also made the following editorial changes.
--- The standard content ASTMD613-08 in 1.4 of this standard as a warning;
--- This standard increases the physical and chemical properties Information Appendix two positive standard fuel and test fuel.
This standard replaces GB/T 386-1991 "Determination of diesel fuel ignition quality (cetane law)."
This standard compared with GB/T 386-1991 main changes are as follows.
--- The standard name from "ignition quality of diesel assay (cetane Law)" was changed to "diesel cetane number determination";
--- According to the contents of this standard ASTMD613-08 "Chapter 5, meaning and purpose," the increased introduction;
--- The standard Chapter 1 "Scope", increasing the scope of the cetane number from 0 to 100, but the typical measurement range of 30 to 65
Statements;
--- This standard adds Chapter 2, "normative references";
--- The standard Chapter 3 "Terms and definitions" amended the relevant content GB/T 386-1991 defined in Chapter 2;
--- This standard adds Chapter 5, "interference factor";
--- The standard Chapter 6 "device" Modifying the GB/T 386-1991 Chapter 4, part of equipment, increasing the standard fuel configuration
Device, content assist device;
--- This standard adds, "Chapter 10 of the engine calibration and verification";
--- This standard modifies the "Chapter 11 Test Procedure" part;
--- 14.1.1 and 14.1.2 of the revised standard GB/T 386-1991 14.1 and 14.2 repeatability and reproducibility.
--- This standard adds to Appendix A, Appendix B, Appendix C, Appendix D and Appendix G; deleted GB/T 386-1991 in Appendix B,
Appendices C and D.
Appendix C of this standard is a normative appendix; this standard Annex A, Annex B, Appendix D, Appendix E, Appendix F and Appendix G are funded
Material appendix.
The standard proposed by China Petroleum and Chemical Corporation.
This standard by the National Standardization Technical Committee of petroleum products lubricants oil and lubricants and fuels Technical Committee (SAC /
TC280/SC1) centralized.
This standard was drafted. China Petroleum & Chemical Corporation Research Institute of Petroleum.
The main drafters of this standard. Wang Li, Xu Feng.
This standard replaces the standards previously issued as follows.
--- GB 386-1964, GB/T 386-1991.
introduction
Cetane number is a measure of diesel fuel ignition properties in compression ignition engines.
This standard is widely used in petrochemical industry, refineries, distributors, engine manufacturers, fuel and engine as the corresponding master
To index determined.
Cetane number in a pre-combustion chamber type compression lighted test engine at a constant speed measurement. Test engine performance and
Full scale, variable speed, variable correlation between the engine load is not entirely clear.
The standard in the determination of unconventional fuel, the engine in the full scale and nature of this oil correlation is not entirely clear.
Cetane number determination
Warning. This standard relates to certain hazardous materials, operations and equipment, but did not advise on all security issues. Therefore,
Household before using this standard to establish appropriate safety measures, and determine the applicability of regulatory limitations related. For safety warnings detailed content
See Appendix B.
1 Scope
This standard specifies the test method for determining the cetane number of diesel with a cetane tester. This standard can also be used for unconventional fuels such as
Synthetic fuels, vegetable oils and similar products. Cetane number ranges from 0 to 100, but the typical cetane test range 30 to 65.
This standard applies to the quantitative determination of compression-ignition engine fuel cetane number. Samples under certain operating conditions by a standard single
Cylinder, four-stroke, variable compression ratio, indirect injection diesel engine for testing.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (excluding corrections) 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 265 Petroleum products - Determination of kinematic viscosity and dynamic viscosity calculation
GB/T 511 Petroleum products and additives - Determination of mechanical impurities (gravimetric method)
GB/T 1884 crude oil and liquid products - Laboratory determination of density (density meter method) (GB/T 1884-2000, eqv ISO 3675.
1998)
GB/T 2430 Determination of the freezing point of aviation fuels
GB/T 4756 petroleum liquids hand sampling method (GB/T 4756-1998, eqv ISO 3170. 1988)
GB/T 6536 Petroleum products - Determination of distillation
GB/T 6540 Petroleum products - Determination of color
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 6986 Petroleum Determination of cloud point (GB/T 6986-1986, eqv ISO 3015. 1974)
SH/T 0234 and an iodine value light petroleum products - Determination of unsaturated hydrocarbons (iodine - Ethanol)
SH/T 0236 Petroleum products - Determination of bromine number
SH/T 0604 crude oil and petroleum products densitometry (U-shaped vibrating tube method) (SH/T 0604-2000, eqv ISO 12185.
1996)
SH/T 0724 liquid hydrocarbons refractive index and dispersion of the refractive assays
SY/T 5317 petroleum liquids pipeline automatic sampling (SY/T 5317-2006, ISO 3171. 1988, IDT)
3 Terms and Definitions
The following terms, definitions and abbreviations apply to this standard.
3.1 General terms and definitions
3.1.1
Recognized reference accepte......
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