GB/T 41481-2022Road vehicles - Cleanliness of components and systems (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for

Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.

This Document equivalently adopted ISO 16232:2018 Road Vehicles - Cleanliness of

Components and Systems.

The following minimal editorial changes have been made to this Document:

--- Delete Annex L (Informative) of ISO 16232:2018.

Please note some contents of this Document may involve patents. The issuing agency of this

Document shall not assume the responsibility to identify these patents.

This Document was proposed by the Ministry of Industry and Information Technology of PRC.

This Document shall be under the jurisdiction of the National Technical Committee of Auto

Standardization (SAC/TC 114).

Drafting organizations of this Document: Shanghai Mingxing Kaicheng Ultrasonic Technology

Co., Ltd.; Shanghai Suying Cleanliness Technology Development Co., Ltd.; Jomesa

Measurement System (China) Co., Ltd.; Shanghai Jiao Tong University; Shanghai Normal

University; Pan-Asia Technical Automotive Center Co., Ltd.; and SAIC Maxus Automotive Co.,

Ltd.

Chief drafting staffs of this Document: Zhong Jiancheng, Liu Bo, Lian Fengqi, Xu Qunhui,

Zhang Qiuhong, Wang Lei, Zhang Zhinan, Shangguan Qianqian, Tang Ning, and Zhou Lin.

Road Vehicles - Cleanliness of Components and Systems

1 Scope

WARNING: The use of this document can involve hazardous materials, operations and

equipment. This document does not purport to address all of the safety problems

associated with its use. It is the responsibility of the user of this document to establish

appropriate safety and health practices and to determine the applicability of any other

restrictions prior to its use.

This document specifies requirements for applying and documenting methods for determining

particulate contamination on functionally-relevant components and systems (cleanliness

inspection) of road vehicles.

A cleanliness inspection comprises the basis of an assessment of technical cleanliness, which

is performed, for example, under the following circumstances:

--- initial inspection and evaluation;

--- inspection of incoming and outgoing components; and

--- quality control or monitoring of manufacturing processes relevant to cleanliness (e.g.

cleaning, surface treatment and assembly processes).

This document is intended to improve the informative quality and comparability of test results.

It also defines the standardized expression of cleanliness specifications and cleanliness test

results in the quality chain of the automotive industry.

This document does not apply to the following:

--- detection of filmy contamination (grease, oils, etc.);

--- application of non-quantifiable particulate detection methods on test components (e.g.,

visual assessment, wipe test with clean cloth, etc.); and

--- characterization of operating fluids (fuel, oils, coolants, brake fluid, etc.).

This document does not define any cleanliness limit values for specific components or systems.

The degree of cleanliness required for a specific component or system is dependent on a number

of highly individual factors. Cleanliness specifications are intended to be undertaken only by

specialists who not only know the component concerned but also the system it is built into, the

later conditions of use, technically-feasible practices and possible consequences for

manufacturing processes and the supply chain. Guidance for deriving limit values can be found

in Annex H.

2 Normative References

The provisions in following documents become the essential provisions of this Document

through reference in this Document. For the dated documents, only the versions with the dates

indicated are applicable to this Document; for the undated documents, only the latest version

(including all the amendments) is applicable to this Document.

ISO 11500 Hydraulic Fluid Power - Determination of the Particulate Contamination Level

of a Liquid Sample by Automatic Particle Counting Using the Light-Extinction Principle

NOTE: GB/T 37163-2018 Hydraulic Fluid Power - Determination of the Particulate Contamination

Level of a Liquid Sample by Automatic Particle Counting Using the Light-Extinction Principle

(ISO 11500:2008, MOD)

3 Terms and Definitions

For the purposes of this Document, the following terms and definitions apply.