GB/T 14039-2026Hydraulic fluid power—Contamination analysis—Method for coding the level of contamination by solid particles (English PDF)

Foreword

This standard is modified to adopt ISO 4406:1999 "Hydraulic fluid power -Fluids - Method for coding the level of contamination by solid particles" (English version), which is a revision of GB/T 14039-1993 "Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles".

From the date of publication, this standard replaces GB/T 14039-1993.

This standard made the following revisions when adopting ISO 4406:1999:

- In "2 Normative references" and the corresponding references in the text, USE GB/T 18854-2002 to replace "ISO 11171:1999" in ISO 4406:1999.

GB/T 18854-2002 revises and adopts ISO 11171:1999;

- In this standard, USE GB/T 14039-1993 to replace "ISO 4406:1987" as mentioned in ISO 4406:1999. GB/T 14033-1193 equivalently adopts ISO 4406:1987;

- In the "References" of this standard, USE "GB/T 17489-1998" to replace the "ISO 4021:1992" in ISO 4406:1999. GB/T 17489-1998 equivalently adopts ISO 4021:1992.

- For ease of use, make the necessary editorial changes to ISO 4406:1999 in accordance with GB/T 1.1-2000.

The main modification contents of this standard to GB/T 14039-1993 are as follows:

- For the use of automatic particle counter as calibrated according to GB/T 18854-2002, USE the particle concentration code of three size ranges: >= 4 µm (c), >= 6 µm (c), >= 14 µm (c) to indicate the contamination level of fluid;

- CANCEL the original code 0.9; ADD five codes: 25, 26, 27, 28, more than 28; INCREASE the total number of codes from 26 to 30;

- ADOPT the same standard name as the Chinese translation of ISO 4406:1999.

Appendix A of this standard is normative.

This standard was proposed by the China Machinery Industry Federation.

This standard shall be under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (CSBTS/TC 3).

Drafting organizations of this standard: China University of Mining and Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles

1 Scope

This standard specifies the code used to determine the level of solid particle contamination in the fluid of hydraulic system.

2 Normative references

The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard;

however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB/T 18854-2002 Hydraulic fluid power - Calibration of liquid automatic particle counters (ISO 11177:1999, MOD) ISO 4407:1991 Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using a microscope ISO 11500:1997 Hydraulic fluid power - Determination of particulate contamination by automatic counting using the light extinction principle

3 Description of code