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GB/T 31562-2024Foundry machinery - Method for the determination of cleanliness (English PDF)

铸造机械清洁度测定方法

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Issued by

State Administration for Market Regulation; Standardization Administration of the PRC

Level / Type

National · Recommended

Issue date

September 29, 2024

Implementation date

April 1, 2025

Scope

GB/T 31562-2024 is the English-translated version of 铸造机械清洁度测定方法.

GB/T 31562-2024 is the Chinese standard "Foundry machinery - Method for the determination of cleanliness". Its scope clause reads: This document provides the selection basis and cleanliness assessment method for foundry machinery cleanliness.

Determine the method. This document applies to the determination of cleanliness of foundry machinery. Its clauses include terms and definitions.

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Document preview — GB/T 31562-2024

National Standard of the People's Republic of China

ICS: 25.120.30
Classification: J 61

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4.Selection basis of cleanliness determination method and cleanliness assessment method
4.1 Basis for selecting cleanliness determination method
4.2 Cleanliness Assessment Methods
5 Gravimetric method
5.1 Sampling
5.2 Filter
5.3 Drying
5.4 Weighing
5.5 Calculation and determination
6 Particle counting method
6.1 Microscopic particle counting method
6.2 Automatic particle counting method
Appendix A (Normative) Sampling
Appendix B (Informative) Weight Method Cleanliness Test Record Calculation Table
Appendix C (Informative) Microscope Particle Counting Method Cleanliness Test Record Sheet
Appendix D (Normative) Cleanliness Level Code

1 Scope

This document provides the selection basis and cleanliness assessment method for foundry machinery cleanliness.

Determine the method.

This document applies to the determination of cleanliness of foundry machinery.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document.

GB/T 37163 Hydraulic transmission - Determination of particle contamination of liquid samples by automatic particle counting method using the light shielding principle

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Contaminants

Solid particles contained in the object being measured that have a harmful effect on the working performance, service life and reliability of the casting machinery (such as metal cutting chips, sand, dust, fibers and other debris).

Note. The objects to be measured are usually the surfaces of parts or hydraulic and lubrication systems of casting machinery with cleanliness requirements.

3.2 Cleanliness

The amount of pollutants contained in the object being measured.

3.3 Gravimetry

A method of determining cleanliness by detecting the mass of contaminants.

Note. The mass value of pollutants is usually expressed in milligrams (mg).

3.4

The cleanliness is determined by detecting the particle size of pollutants in the liquid sample or on the filter test piece and the number of particles in different size ranges.

Cleanliness method.

3.5

Particle counting method using optical microscopy and manual counting.

3.6

A particle counting method that uses an automatic particle counter or image recognition and analysis equipment with a camera function to automatically measure and count particles.

GB/T 39962 | GB/T 39957 | GB/T 37371 | GB/T 31561 | GB/T 31553 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 37163Hydraulic fluid power - Contamination analysis - Determination of the particulate contamination level of a liquid sample by automatic particle counting using the light-extinction principle

Cited by

Similar standards

GB/T 31552-2023|GB/T 31553-2015|GB/T 31561-2015|GB/T 25711-2010|GB/T 14039-2002

Editions of GB/T 31562

Edition	Title	Revision	Status
GB/T 31562-2015	Foundry machinery - Method for the determination of cleanliness	first issue	Superseded
GB/T 31562-2024	Foundry machinery - Method for the determination of cleanliness	first revision	Current

This page sells the current edition, GB/T 31562-2024. Earlier editions are listed for reference only.

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