ISO 23309:2020
Hydraulic fluid power systems — Assembled systems — Methods of cleaning lines by flushing
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle of flushing
5 Flushing lines in a hydraulic system
5.1 Initial factors to consider
5.2 System layout
5.3 Component cleanliness level
5.4 Anti-corrosion agents
6 Treatment of lines
6.1 Preparation of lines during fabrication
6.2 Surface treatment
6.3 Storage of lines and connectors
7 Installation of piping systems
8 Flushing requirements
8.1 Flushing document
8.2 Flushing criteria
8.3 Flushing parameters
8.4 Filters and separation of particles
8.4.1 General requirements
8.4.2 Additional external flushing filters
8.5 Monitoring the progress of flushing
8.5.1 Options for monitoring
8.5.2 Sampling procedures
8.5.3 Minimum flushing time before oil samples are taken
8.6 Flushing procedures
8.6.1 General
8.6.2 Preliminary stages
8.6.3 Stage 1 — Flushing at low pressure
8.6.4 Stage 2 — Flushing at higher pressures
8.6.5 Verification of final cleanliness level
9 Identification statement (reference to this document)
Annex A (informative) Guidelines for obtaining the Required Cleanliness Level (RCL) for a system
Annex B (informative) Factors influencing the effectiveness and duration of flushing
Annex C (informative) Identification and relationship between the main flushing requirements
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle of flushing
5 Flushing lines in a hydraulic system
5.1 Initial factors to consider
5.2 System layout
5.3 Component cleanliness level
5.4 Anti-corrosion agents
6 Treatment of lines
6.1 Preparation of lines during fabrication
6.2 Surface treatment
6.3 Storage of lines and connectors
7 Installation of piping systems
8 Flushing requirements
8.1 Flushing document
8.2 Flushing criteria
8.3 Flushing parameters
8.4 Filters and separation of particles
8.4.1 General requirements
8.4.2 Additional external flushing filters
8.5 Monitoring the progress of flushing
8.5.1 Options for monitoring
8.5.2 Sampling procedures
8.5.3 Minimum flushing time before oil samples are taken
8.6 Flushing procedures
8.6.1 General
8.6.2 Preliminary stages
8.6.3 Stage 1 — Flushing at low pressure
8.6.4 Stage 2 — Flushing at higher pressures
8.6.5 Verification of final cleanliness level
9 Identification statement (reference to this document)
Annex A (informative) Guidelines for obtaining the Required Cleanliness Level (RCL) for a system
Annex B (informative) Factors influencing the effectiveness and duration of flushing
Annex C (informative) Identification and relationship between the main flushing requirements
Bibliography