GB/T 511-2010Petroleum, petroleum products and additives -- Method for determination of mechanical admixtures (English PDF)

Foreword

This Standard modified and adopted the former Soviet Union standard TOCT

6370-1983 (1997) "Petroleum, petroleum products and additives - Method for

determination of mechanical admixtures".

This Standard was re-drafted in accordance with TOCT 6370-1983 (1997).

This Standard modified TOCT 6370-1983 (1997) so as to make it suitable for

the national conditions of China. The structural differences between this

Standard and TOCT 6370-1983 (1997) are shown in Appendix A; and technical

differences are shown in Appendix B. The main technical differences between

this Standard and TOCT 6370-1983 (1997) are as follows.

- Added "Normative references" in this Standard;

- Made appropriate modifications to "equipment and materials" of TOCT

6370-1983 (1997) in Clause 4 "Equipment and materials", based on

Chinese actual situation;

- TOCT 6370-1983 (1997) requires to use white or red card quantitative

analysis filter paper, and white card filter paper is required in arbitration

test; this Standard adopts quantitative filter paper of which the speed is

moderate and diameter is 11 cm based on Chinese national conditions

(GB/T 1914);

- Deleted 2.4 and 2.5 of TOCT 6370-1983 (1997), i.e., " Before filter paper

or porous glass filter reaches to constant weight, it shall use the solvent

used in the test to rinse in advance"; added 7.9 and blank test correction

during calculation;

- Added notes in 7.4; made description of the processing of new porous

glass filter and the cleaning after use;

- Added Appendix A "Comparison on clause number between this Standard

and TOCT 6370-1983 (1997)" and Appendix B "Technical differences

between this Standard and TOCT 6370-1983 (1997)".

This Standard replaces GB/T 511-1988 "Petroleum products and additives -

Method for determination of mechanical admixtures (gravimetric method)"

which was formulated by adopting TOCT 6370-59 "Petroleum products and

additives - Method for determination of mechanical admixtures".

Compared with GB/T 511-1988, the main changes are as follows.

- The name of this Standard was modified as "Petroleum, petroleum

products and additives - Method for determination of mechanical

admixtures";

- The application was modified as. petroleum, liquid petroleum products

and additives; not applicable to lubricating grease and asphalt;

- Modified porous glass filter specifications in this Standard based on TOCT

6370-1983 (1997);

- In reagents, benzene was replaced by toluene, and ethanol-benzene

mixed solvent (1.4) was replaced by ethanol- toluene mixed solvent (1.4);

- For constant weight paper or porous glass filter, the oven temperature

was modified from 105°C~110°C to 105°C±2°C; and the first drying time

was modified from "not less than 1h" to "not less than 45 min";

- During preparation, this Standard deleted "when using filter paper, when

using ethanol-benzene mixture or ethanol-ether mixture to continue

rinsing in the test instead of distilled water, it shall use 50 mL of above-

mentioned solvents to rinse the filter paper"; added the calculation of blank

test correction in calculation equation;

- Dilution ratio of sampling volume and solvent in this Standard was

modified based on TOCT 6370-1983 (1997);

- Solvent for rinsing in test procedures was modified based on TOCT 6370-

1983 (1997);

- During determination of mechanical admixtures in petroleum, this

Standard added "use silver nitrate solution to inspect chloride in filtrate";

- Precision was modified according to TOCT 6370-1983 (1997);

requirements for repeatability is stricter; added reproducibility.

Appendix A and Appendix B of this Standard are informative.

This Standard was proposed by National Standardization Technical Committee

on Petroleum Products and Lubricants.

This Standard shall be under the jurisdiction of Petroleum Fuels and Lubricants

Technical Committee of National Standardization Technical Committee on

Petroleum Products and Lubricants.

The drafting organization of this Standard. North-China Institute of China

Petrochemical Sales Co., Ltd.

Drafter of this Standard. Chen Chunhui.

This Standard replaces the following previous standards.

- GB/T 511-1965, GB/T 511-1977, GB/T 511-1988.

Petroleum, petroleum products and additives -

Method for determination of mechanical admixtures

1 Scope

This Standard specifies the method for determination of mechanical admixtures

in petroleum, petroleum products and additives by using constant weight

quantitative filter paper or porous glass filter to filter the sample.

This Standard is applicable to determination of mechanical admixtures in

petroleum, petroleum products and additives.

This Standard is not applicable to lubricating grease and asphalt.

2 Normative references

The following standards contain the provisions which, through reference in this

Standard, constitute the provisions of this Standard. For dated references,

subsequent amendments (excluding corrections) or revisions do not apply to

this Standard. However, the parties who enter into agreement based on this

Standard are encouraged to investigate whether the latest versions of these

documents are applicable. For undated reference documents, the latest

versions apply to this Standard.

GB/T 1914 Chemical analytical filter paper

GB/T 6682 Water for analytical laboratory use - Specification and test

methods (GB/T 6682-2008, ISO 3696.1987, MOD)

SH 0004 Solvent oil for rubber industrial use

3 Method summary

Weigh a certain amount of sample; dissolve it in the solvent used; use constant

weight filter paper or porous glass filter to filter; the admixtures left on the filter

paper or porous glass filter is the mechanical admixtures.

4 Apparatus

5 Reagents and materials

6 Preparation

7 Test procedure

8 Calculation

The content of mechanical admixtures in sample w% (mass fraction) is

calculated according to equation (1).

9 Report