ASTM D4174-23

  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