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GB/T 25133-2010 English PDF (GBT25133-2010)

GB/T 25133-2010 English PDF (GBT25133-2010)

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GB/T 25133-2010: Hydraulic fluid power systems -- Assembled systems -- Methods of cleaning lines by flushing
GB/T 25133-2010
Hydraulic fluid power systems.Assembled systems.Methods of cleaning lines by flushing
ICS 23.100.40
J20
National Standards of People's Republic of China
Hydraulic system assembly pipeline flushing method
(ISO 23309.2007, IDT)
Released on.2010-09-26
2011-02-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Foreword
This standard is equivalent to ISO 23309.2007 "Hydraulic Transmission System Assembly Pipeline Flushing Method" (English version).
This standard is equivalent to translation ISO 23309.2007.
For ease of use, this standard has the following editorial changes.
--- Change "this International Standard" to "this standard";
--- Replace the comma "," as a decimal point with the decimal symbol ".";
--- Remove the preface to international standards;
--- Replace the corresponding international standards with national standards.
Appendix A of this standard is an informative annex.
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3).
This standard was drafted. Liming Hydraulic Co., Ltd., Beijing University of Chemical Technology, China Shipbuilding Industry Corporation 707 Institute
(Jiujiang), Aviation Industry Corporation Filtration and Separation Machinery Product Quality Supervision and Inspection Center.
The main drafters of this standard. Ye Ping, Li Fangjun, Zheng Yuan, Gao Yuanan, Huang Huiwen, Lu Hongnan.
introduction
In hydraulic drive systems, power is transferred and controlled by means of pressurized liquid in a closed circuit.
The initial cleanliness level of the hydraulic system will affect the performance and service life of the system. If the system is not removed during manufacturing and assembly
The resulting particulate contaminants, which circulate in the system and destroy system components. In order to reduce the probability of such damage, liquids and liquids
The inner surface of the press system needs to be filtered and rinsed to the specified cleanliness level.
Flushing the piping of the hydraulic system is one way to remove particulate contaminants from the system, but it is not the only way.
Hydraulic system assembly pipeline flushing method
1 Scope
This standard specifies methods for flushing solid particulate contaminants in hydraulic system piping. These contaminants may be in the system of new hydraulic systems.
It is brought in during the manufacturing process or during the repair and modification of the existing system.
This standard supplements, but does not replace, the requirements of system suppliers and users, especially when their requirements are more stringent than those specified in this standard.
This standard does not apply to the following situations.
a) Chemical cleaning and pickling of hydraulic fittings.
b) Cleaning of the main components of the system (see GB /Z 19848-2005).
The cleanliness level inspection of the system assembly is carried out in accordance with GB /Z 20423.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
GB/T 17446 fluid drive system and component terminology (GB/T 17446-1998, idtISO 5598. 1985)
GB/T 17489 Hydraulic particle contamination analysis Extract liquid samples from working system pipelines (GB/T 17489-1998, idtISO 4021.
1992)
GB /Z 19848-2005 Guidelines for the achievement and control of cleanliness of hydraulic components from manufacture to installation (ISO /T R10949.2002,
IDT)
GB /Z 20423 Hydraulic system assembly cleanliness inspection (GB /Z 20423-2006, ISO /T S16431.2002, IDT)
3 Terms and definitions
The terms and definitions established in GB/T 17446 and the following are applicable to this standard.
3.1
Flushing
The process of cleaning the hydraulic piping system, including the rinsing medium circulating in the hydraulic system piping to remove, transport and filter in processing and assembly
And particulate contaminants entering the system during maintenance.
3.2
External flushing outflushing
The process of freeing a sufficient volume of flushing media from the blind end of the pipe to an open vessel or bucket to remove contaminants therefrom.
3.3
Visual cleanliness visiblecleanliness
The surface cleanliness of the identification can be directly visually observed without magnification.
3.4
Clean work area cleanworkarea
Work area where no debris or particles are produced during work.
Note. Activities such as welding, shovel, cutting, grinding or burning can produce debris or particles and are therefore not allowed in the cleaning work area.
4 cleanliness level
The primary purpose of rinsing is to achieve a system or component cleanliness level as required by the user or supplier. For unspecified cleanliness levels
For the case, see the selection guide in Appendix A.
5 Flushing of the pipeline in the hydraulic system
5.1 Influencing factors
In order to achieve a satisfactory cleanliness level for the hydraulic system piping, the following influencing factors need to be considered.
a) Select components that have been cleaned in accordance with GB /Z 19848-2005;
b) the initial cleanliness of the mating line;
c) using a suitable flushing procedure;
d) Select a filter with a suitable filter to ensure that the required cleanliness level is achieved within the allowed time period;
e) Establish a turbulent state to remove and transport particles to the filter.
5.2 System Design
5.2.1 The design of the hydraulic system should consider the flushing of the system during the design phase. Blind ends that cannot be flushed should be avoided. Such as
If the particulate contaminant has a risk of moving from the blind end to the rest of the system, the blind end should be able to be flushed externally.
5.2.2 Pipes connected for flushing are not allowed to be connected in parallel, and only in series under turbulent conditions are allowed. Hydraulic system
Pipes in the system should also avoid parallel flow paths unless instrumented inspections demonstrate sufficient flow in each parallel flow path.
5.2.3 Current limiting components and components susceptible to damage from high flow rates or particulate contaminants should be capable of being removed from the circuit or bypass. After removing the components
Ensure that the lines are connected to each other for flushing.
5.2.4 The critical position in the system shall be provided with a sampling valve in accordance with GB/T 17489.
5.3 Component cleanliness level
The cleanliness levels of components and components installed in the system should be at least the same or higher than the specified system cleanliness level. Component supply
The supplier shall provide information on the cleanliness level of the components.
5.4 Preservatives
If the component contains a preservative that is incompatible with the system's working medium, use a detergent that is compatible with the system seal and working media.
Wash the components. Detergents are not allowed to affect the sealing of the components.
6 pipeline t...
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