ISO 28521:2009
Current
The latest, up-to-date edition.
Ships and marine technology — Hydraulic oil systems — Guidance for grades of cleanliness and flushing
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English, Russian
26-05-2009
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ISO 28521:2009 specifies pipe cleaning and cleaning levels of hydraulic oil pipe systems. The cleaning of pipes and components in hydraulic oil pipe systems is essential for the trouble-free operation of hydraulic systems.
It indicates methods and equipment for the practical execution of the cleaning of specific parts of hydraulic systems with appurtenant components.
The purpose of the cleaning process is to remove installation dirt and to check that the piping and hydraulic system have been adequately cleaned.
The cleaning process of a system is considered a “washing through” process when the Reynolds number,Re, u 3 000, and a flushing process when Re W 3 000. The Reynolds number is an indicator of whether a fluid flow is considered laminar or turbulent.
ISO 28521:2009 presupposes that the pipe sections of the hydraulic system have been cleaned partly by pickling and partly by mechanical cleaning. It is furthermore assumed that both dynamic and static components from system suppliers are adequately clean when delivered.
The specifications given in ISO 28521:2009 are supplementary to, and not a replacement for, the guidelines specified by the various manufacturers. The manufacturer's guidelines, where available, take precedence.
| DevelopmentNote |
Supersedes ISO/DIS 28521. (05/2009)
|
| DocumentType |
Standard
|
| Pages |
15
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| SAC GB/T 30508 : 2014 | Identical |
| NEN ISO 28521 : 2009 | Identical |
| 08/30168615 DC : DRAFT JAN 2008 | BS ISO 28522 - SHIPS AND MARINE TECHNOLOGY - HYDRAULIC OIL SYSTEMS - GUIDANCE FOR ASSEMBLING AND FLUSHING |
| 08/30168612 DC : DRAFT JAN 2008 | BS ISO 28520 - SHIPS AND MARINE TECHNOLOGY - LUBRICATING OIL PIPE SYSTEMS - RECOMMENDED DEGREES OF CLEANING AND FLUSHING |
| ISO 28523:2009 | Ships and marine technology — Lubricating and hydraulic oil systems — Guidance for sampling to determine cleanliness and particle contamination |
| ISO 8501-1:2007 | Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings |
| ISO/TR 10949:2002 | Hydraulic fluid power Component cleanliness Guidelines for achieving and controlling cleanliness of components from manufacture to installation |
| ISO 11171:2016 | Hydraulic fluid power Calibration of automatic particle counters for liquids |
| ISO 16889:2008 | Hydraulic fluid power Filters Multi-pass method for evaluating filtration performance of a filter element |
| ISO 18413:2015 | Hydraulic fluid power Cleanliness of components Inspection document and principles related to contaminant extraction and analysis, and data reporting |
| ISO 4021:1992 | Hydraulic fluid power — Particulate contamination analysis — Extraction of fluid samples from lines of an operating system |
| ISO 28523:2009 | Ships and marine technology — Lubricating and hydraulic oil systems — Guidance for sampling to determine cleanliness and particle contamination |
| ISO 3448:1992 | Industrial liquid lubricants — ISO viscosity classification |
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