1.1 This practice is intended to aid 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.
1.2 This practice is presented in the following sequence:
Section Scope 1 Referenced Documents 2 Significance and Use 3 Definitions 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 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 to 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 Oil Heating Prior to Flushing 9.3 Selection of Flushing Oil 9.4 System Operation Oil 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 9.5.4 Draining of Flushing Oil 9.5.5 Displacement Oil ......
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