ASTM D 4174 : 2023
Current
The latest, up-to-date edition.
Standard Practice for Cleaning, Flushing, and Purification of Petroleum Fluid Hydraulic Systems
Hardcopy , PDF
English
25-07-2023
1.1This practice covers aid for the equipment manufacturer, the installer, the oil supplier and the operator in coordinating their efforts towards obtaining and maintaining clean petroleum fluid hydraulic systems. Of necessity, this practice is generalized due to variations in the type of equipment, builder's practices, and operating conditions. Constant vigilance is required throughout all phases of design, fabrication, installation, flushing, testing, and operation of hydraulic systems to minimize and reduce the presence of contaminants and to obtain optimum system reliability.
1.2This practice is presented in the following sequence:
| Section | |
| Scope | 1 |
| Referenced Documents | 2 |
| Terminology | 3 |
| Significance and Use | 4 |
| Types of Contamination | 5 |
| General | 5.1 |
| Water | 5.2 |
| Soluble Contaminants | 5.3 |
| Insoluble Contaminants | 5.4 |
| Lodged Contamination | 5.4.2.1 |
| Suspended or Loose Contamination | 5.4.2.2 |
| Contamination Control | 6 |
| General | 6.1 |
| Initial Filling | 6.1.1 |
| In-Service Units | 6.1.2 |
| Connection of Contamination Control System | 6.1.3 |
| Piping or Tubing Contamination Control System | 6.1.4 |
| Contamination Control Procedures | 6.2 |
| Full Flow Contamination Control | 6.2.1 |
| Bypass Contamination Control | 6.2.2 |
| Batch Contamination Control | 6.2.3 |
| Contamination Control Processes | 6.3 |
| Gravity | 6.3.1 |
| Mechanical | 6.3.2 |
| Centrifuge | 6.3.2.1 |
| Filters | 6.3.2.2 |
| Supplementary Methods | 6.3.3 |
| Limitations of Contamination Control Devices | 6.3.4 |
| Storage | 7 |
| General | 7.1 |
| Inspection | 8 |
| General | 8.1 |
| System Components | 8.2 |
| Valves, Strainers, and Coolers | 8.2.1 |
| Sumps and Tanks | 8.2.2 |
| Control Devices | 8.2.3 |
| Pumps | 8.2.4 |
| Flushing Program | 9 |
| General | 9.1 |
| Preparation of System for Flushing | 9.2 |
| Fluid Heating Prior to Flushing | 9.3 |
| Selection of Flushing Oils | 9.4 |
| System Operation Fluid | 9.4.1 |
| Special Flushing Oil | 9.4.2 |
| Flushing Oil Selection Guide | 9.4.3 |
| Flushing Procedure for New Systems | 9.5 |
| Flushing Oil Charge | 9.5.1 |
| Cleaning of Filtration Devices | 9.5.2 |
| Cleaning of System Components | 9.5.3 |
| System Flushing and Flush Acceptance Criteria | 9.5.4 |
| Draining of Flushing Oil | 9.5.5 |
| Displacement Oil | 9.5.6 |
| Interim Corrosion Protection | 9.5.7 |
| New Fluid Charge | 9.5.8 |
| Flushing of Used Systems | 9.6 |
| General Guidelines | 9.6.1 |
| Procedure | 9.6.2 |
| System Maintenance | 10 |
| Preinstallation | 10.2 |
| In-Service Units | 10.3 |
| Decision to Flush In-Service Hydraulic Systems | 10.4 |
| Fluid Condition Monitoring | 11 |
| Fluid Sampling Techniques | 11.2 |
| Visual Inspection | 11.3 |
| Laboratory Analysis | 11.4 |
| Fluid Cleanliness Criteria | 11.5 |
| General Information | 12 |
| Centrifuge Ratings | 12.2 |
| Coalescence | 12.3 |
| Vacuum Dehydration | 12.4 |
| Adsorption | 12.5 |
1.3The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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