GB 252-2015General diesel fuels (English PDF)

Foreword

Clauses 4, 6 and 8 of this standard are mandatory and the rest are

recommended.

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB 252-2011 "General diesel fuels". As compared with

GB 252-2011, the main changes of this standard are as follows.

- ADD clause 4.1 additives used in general diesel fuel shall have no known

harmful effects and shall be used in accordance with the recommended

appropriate dosage. General diesel fuel shall not contain any additives or

contaminants that can cause the engine to malfunction (see 4.1).

- MODIFY the second paragraph of the Scope to. This standard applies to

petroleum-based or additive-added additives general diesel fuel used in

compression ignition engines such as tractors, diesel locomotives,

construction machinery, inland vessels and generator sets (see clause 1).

- DELETE clause 3 Terms and definitions (see clause 3 of the 2011 version);

- DELETE the relevant content of No.10 general diesel fuel (see Table 1);

- MODIFY the limit of sulfur content index in general diesel fuel (see Table 1);

- ADD the technical requirements for general diesel lubricity and fatty acid

methyl ester content (see Table 1);

- MODIFY clause 5 into "Sampling", with content is modified accordingly (see

clause 5; clause 6 of the 2011 version);

- MODIFY clause 7.1 to. "6.1 The equipment used for general diesel fuel sold

to the user in accordance with Table 1 of this standard shall clearly indicate

the grade and name of the product. Example. No.0 general diesel fuel (see

6.1; clause 7.1 of 2011 version);

- ADD clause 8.Implementation of standard (see clause 8).

This standard shall be under the jurisdiction of the National Petroleum Products

and Lubricants Standardization Technical Committee (SAC/TC 280).

The drafting organization of this standard. Petrochemical Research Institute of

China Petroleum and Chemical Corporation.

The main drafter of this standard. Ni Bei.

This standard replaces the standard previously issued as follows.

- GB252-1964, GB 252-1977, GB 252-1981, GB 252-1987, GB 252-1994,

GB 252-2000, GB 252-2011.

General diesel fuels

Warning. If the appropriate precautions are not observed, the products

covered by this standard may be dangerous during production, storage

and use. This standard is not intended to advise on all safety issues

related to this product. It is the responsibility of the user to establish

appropriate safety and precautions before using this standard and to

determine the applicability of the relevant regulatory restrictions.

1 Scope

This standard specifies the product classification, technical requirements and

test methods, sampling and marking, packaging, transportation and storage,

safety and standard implementation of general diesel fuels.

This standard applies to petroleum-based or additive-added additives general

diesel fuel used in compression ignition engines such as tractors, diesel

locomotives, construction machinery, inland vessels and generator sets

Note. Other special uses besides this may be negotiated between the supplier

and the purchaser.

2 Normative references

The following documents are essential to the application of this document. For

the dated documents, only the versions with the dates indicated are applicable

to this document; for the undated documents, only the latest version (including

all the amendments) are applicable to this standard.

GB 190 Packing symbol of dangerous goods

GB/T 258 Determination of acidity of gasoline, kerosene and diesel fuels

GB/T 260 Petroleum products - Determination of water

GB/T 261 Determination of flash point - Pensky-Martens closed cup method

GB/T 265 Petroleum products - Determination of kinematic viscosity and

calculation of dynamic viscosity

GB/T 268 Petroleum products - Determination of carbon residue -

Conradson method

GB/T 380 Determination of sulfur content in petroleum products (lamp

method)

GB/T 386 Standard test method for cetane number of diesel fuel oil

GB/T 508 Petroleum products. Determination of ash

GB/T 510 Petroleum products - Determination of solidification point

GB/T 511 Petroleum products and additives - Method for determination of

mechanical admixtures

3 Product categories

General diesel fuel is divided into six grades in accordance with the freezing

point.

4 Technical requirements and test methods

5 Sampling

Sampling is carried out in accordance with GB/T 4756, taking 4 L for inspection

and sample retention.

6 Marking, packaging, transportation and storage

7 Safety

In accordance with GB 13690, general diesel oil is a flammable liquid. For the

danger description and precautionary statements, see Appendix D of GB

30000.7-2013.

8 Implementation of standard

This standard shall be implemented as of the date of promulgation and shall be

subject to the gradual introduction of the transition period requirements. For the

requirement for sulfur content in Table 1 being not more than 50 mg/kg, the

transition period is by June 30, 2017, the requirements that the sulfur content

being not more than 350 mg/kg in Table 1 is discarded from July 1, 2017;

Appendix A

(Informative)

Minimum temperature with a risk ratio of 10% in each region

The minimum temperature with a risk ratio of 10% in each region (see Table

A.1) was extracted and compiled from the Temperature Data for Petroleum

Products Standards which was prepared by the Central Meteorological

Administration's Reference Office. The minimum temperature with a monthly

risk ratio of 10% indicates that the probability that the minimum temperature in

the month is lower than this value is 0.1, or otherwise the probability that the

minimum temperature in the month is higher than this value is 0.9.

Appendix B

(Normative)

Inspection of nitrate ester type cetane number improver in diesel

B.1 Scope

B.1.1 This method is applicable to the testing of nitrate ester type cetane

number improvers used in diesel fuel. The method can be used as a qualitative

screening method for determining residual carbon and calculating the cetane

index.

B.1.2 This method involves certain hazardous substances, operations and

equipment and is not intended to advise on all safety issues involved. Therefore,

appropriate safety and protective measures shall be established prior to the use

of this method and the applicability of the relevant regulatory restrictions shall

be determined.

B.2 Method summary

The diesel specimen is saponified in a potassium hydroxide-n-butanol mixture,

filtered by a glass fiber filter paper, the material remaining on the filter paper is

dried and treated with a diphenylamine reagent. Diphenylamine is oxidized by

nitrate to a deep blue quinoid compound. The resulting blue or blue-black spots

indicate that there is a nitrate type cetane number improver. No color change

indicates that there is no nitrate type cetane number improver.

B.3 Instruments or equipment

B.3.1 Reaction bottle. A 30 mL wide mouth jar with a thread cap, there is a tin

or plastic lining inside the cap.

B.5 Test procedure

B.5.1 MIX 6.5 g of potassium hydroxide with 100 mL of n-butanol, HEAT to

dissolve potassium hydroxide, after the solution is cooled, USE the glass fiber

filter paper to filter the mixture, to obtain a saponified mixture.

B.5.2 PIPETTE 10 mL of the specimen into the reaction flask, ADD 5 mL of

toluene, ADD 10 mL of the saponified mixture.

Warning. Pipettes shall not be inhaled by mouth because of the presence

of toxic substances in the test.

B.5.3 USE a thread cap to firmly cover the reaction bottle, MIX the contents,

PLACE it in an oven at 110 °C for 4 h.

B.5.4 REMOVE the reaction bottle from the oven, COOL it to 25 °C ± 3 °C.

B.5.5 FILTER the contents of the reaction bottle in a glass sintered filter

equipped with glass fiber filter paper.

B.5.6 USE 2.5 mL of toluene to rinse the reaction bottle, TRANSFER it into the

glass sintered filter for filtration.

B.5.7 Carefully REMOVE the glass fiber filter paper, PLACE it into an oven at

110 °C to dry it for 15 min.

B.5.8 REMOVE the glass fiber filter paper, COOL it to 25 °C ± 3 °C.

B.5.9 ADD 3 drops of diphenylamine solution to the center of the filter paper,

OBSERVE if blue or blue-black color is formed.

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