ISO 12584:2013

Name: ISO 12584:2013 — Aerospace — Hydraulic fluid components — Expression of particulate contamination levels
SKU: ISO 12584:2013
Price: 25 EUR
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Aerospace — Hydraulic fluid components — Expression of particulate contamination levels

Название (английский):

ISO 12584:2013

Aerospace — Hydraulic fluid components — Expression of particulate contamination levels

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 4 ноября 2013 г.
Издание:: ISO IS 12584 edition 1 version 1
ICS:: 49.080

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Описание (английский):

ISO 12584:2013 defines the method of reporting and communicating the contamination (or cleanliness) level of components used in aerospace fluid systems. It also presents a coding system which allows cleanliness data to be reported, both in a shortened manner and in a complete manner, when communicating for reporting contamination level measurement results and for specifying cleanliness requirements.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 12584:2013 - "Aerospace - Hydraulic fluid components - Expression of particulate contamination levels" defines a consistent method for reporting and communicating particulate contamination (or component cleanliness) for components used in aerospace hydraulic fluid systems. The standard specifies how to extract and count particles, how to normalize results to a common reference volume (per 100 cm³ wetted volume), and provides the Component Cleanliness Code (CCC) - an alphanumeric coding system for succinct or complete reporting of cleanliness requirements and measurement results.

Key topics and requirements

Scope and terminology: Defines component, component cleanliness, particulate contamination, wetted surface, and wetted volume (Vc) - the basis for reporting.

Wetted volume determination: Two permitted approaches:

Experimental filling method (dry interior, controlled fill, measure volume used), or
Calculation from component geometry or CAD drawings.

Particle extraction and analysis: Extraction must follow validated methods (see ISO 18413) and the extraction liquid is analyzed for particle counts across defined size classes. Use of calibrated automatic particle counters should conform to ISO 11171.

Normalization of results: Particle counts are converted to numbers per 100 cm³ of wetted volume to enable consistent comparison across components.

Component Cleanliness Code (CCC): A standardized code (e.g., CCC = (B9/C11/D10/EF8) or CCC = (11) for single-class reporting) that maps particle-size classes to maximum allowable counts (see Table 1 in the standard).

Reporting flexibility: CCC can include all or a subset of size classes, or a single overall class when appropriate.

Annex guidance: Annex A provides V/A (volume-to-surface area) relationships for converting surface-based cleanliness measures to volume-based measures. Annex B gives a sample analysis report format.

Applications and who uses it

ISO 12584:2013 is intended for:

Aerospace manufacturers and suppliers specifying and verifying cleanliness of hydraulic pumps, valves, actuators, filters, and other fluid-system components.

Quality, inspection and test laboratories performing particulate extraction and particle counting.

Maintenance and overhaul organizations documenting acceptance criteria for reconditioned components.

Design and reliability engineers defining cleanliness requirements to protect system performance and longevity.

Practical benefits include standardized cleanliness specifications, clearer supplier communication, reduced ambiguity in acceptance testing, and improved reliability of hydraulic systems by controlling particulate contamination at component-level.

Related standards

ISO 18413 - Cleanliness of parts/components; contaminant collection, extraction and reporting principles.

ISO 11171 - Calibration of automatic particle counters for liquids (relevant for APC use referenced in ISO 12584).

Keywords: ISO 12584:2013, component cleanliness, aerospace hydraulic, particulate contamination, wetted volume, Component Cleanliness Code, CCC, particle counting, ISO 18413, ISO 11171.

ISO 12584:2013

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and who uses it

Related standards

Технические детали

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