ISO 16431:2012 PDF

Name: ISO 16431:2012 — Hydraulic fluid power — System clean-up procedures and verification of cleanliness of assembled systems
SKU: ISO 16431:2012
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Hydraulic fluid power — System clean-up procedures and verification of cleanliness of assembled systems

Название (английский):

ISO 16431:2012

Hydraulic fluid power — System clean-up procedures and verification of cleanliness of assembled systems

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 24 января 2012 г.
Издание:: ISO IS 16431 edition 1 version 1
ICS:: 23.100.60

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Описание (английский):

ISO16431:2012 defines methods to measure the cleanliness of a fluid in an assembled hydraulic fluid power system, to verify a required system cleanliness upon release of the system from the production area, and if needed, to clean the system to the required cleanliness level. The clean-up procedure specified in ISO16431:2012 is not intended to replace proper system flushing procedures; see ISO 23309 for a system flushing procedure. Components and parts used in such systems should be clean prior to assembly; see ISO 18413 for guidance.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 16431:2012 - Hydraulic fluid power - System clean-up procedures and verification of cleanliness of assembled systems - defines procedures to measure, verify, and where necessary clean the fluid cleanliness of assembled hydraulic systems before release from production. The standard specifies sampling and particle-counting methods, use of temporary clean-up or auxiliary filter systems, and reporting requirements. It is intended to supplement good contamination-control practices and is not a substitute for full system flushing (see ISO 23309) or pre‑assembly component cleanliness guidance (see ISO 18413).

Key topics and technical requirements

Purpose: Verify that the assembled hydraulic system meets the agreed required cleanliness level (RCL) before leaving production.

Measurement methods: Off-line bottle sampling (ISO 4021, ISO 3722) and particle analysis using automatic particle counters (ISO 11500), optical microscopy (ISO 4407) or monitoring (ISO 21018‑1).

Test equipment: Fluid line sampler, qualified sample containers, particle counting/monitoring equipment, and clean-up or auxiliary filtration and circulation means.

Clean-up procedure (high level):

Install fluid line sampler (preferably upstream of the system filter).
Circulate fluid through all circuits and exercise components.
Obtain sample and perform particle count / on-line monitoring.
If cleanliness does not meet the RCL, select and install a clean-up filter or auxiliary filter system; bypass components if required.
Circulate until target cleanliness is achieved; retest and repeat as needed.
Remove temporary connections and report results.

Acceptance criteria: System accepted when measured cleanliness is equal to or cleaner than the RCL agreed between supplier and purchaser (reported per ISO 4406 coding).

Reporting: Test report must record date, system ID, measured cleanliness, sampling method, bypassed components, operating conditions (temperature, pressure, fluid type/viscosity), and analysis method/mode.

Applications and users

ISO 16431:2012 is practical for:

Hydraulic system manufacturers and OEMs verifying cleanliness at final assembly.

Quality, production and contamination‑control engineers setting release criteria.

Maintenance teams and service providers performing refurbishment or reassembly.

Test laboratories performing particle contamination analyses and issuing compliance reports.

Using ISO 16431 supports improved system reliability, reduced wear and failure rates, and documented conformity to buyer/supplier cleanliness requirements.

Related standards

ISO 23309 - System flushing procedures (complementary to 16431)

ISO 18413 - Cleanliness of parts and components (pre‑assembly guidance)

ISO 4021, ISO 3722 - Sampling and sample container qualification

ISO 11500, ISO 4407, ISO 21018‑1 - Particle counting and monitoring methods

ISO 4406 - Coding contamination levels

Keywords: ISO 16431:2012, hydraulic fluid power, system clean-up, cleanliness verification, clean-up filter, particle count, contamination control, assembled hydraulic systems.

ISO 16431:2012 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 23309:2020

Hydraulic fluid power systems — Assembled systems — Methods of cleaning lines by flushing

SIST ISO 18413:2016

Hydraulic fluid power - Cleanliness of components - Inspection document and principles related to contaminant…

SIST ISO 4021:1997

Hydraulic fluid power -- Particulate contamination analysis -- Extraction of fluid samples from lines of an o…

SIST ISO 3722:1997

Hydraulic fluid power -- Fluid sample containers -- Qualifying and controlling cleaning methods

ISO 11500:2022/Amd 1:2026

Hydraulic fluid power — Determination of the particulate contamination level of a liquid sample by automatic…

SIST ISO 4407:2003

Hydraulic fluid power -- Fluid contamination -- Determination of particulate contamination by the counting me…

BS ISO 21018-1:2008

Hydraulic fluid power. Monitoring the level of particulate contamination of the fluid - General principles

BS ISO 4406:2021

Hydraulic fluid power. Fluids. Method for coding the level of contamination by solid particles.