GB/T 13277.1-2023Compressed air - Part 1: Contaminants and purity classes (English PDF)

Foreword

This document is drafted in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document is Part 1 of GB/T 13277 Compressed air. The following parts of GB/T 13277 have been published:

- Part 1: Contaminants and purity classes;

- Part 2: Test methods for oil aerosol content;

- Part 3: Test methods for measurement of humidity;

- Part 4: Test methods for solid particle content;

- Part 5: Test methods for oil vapour and organic solvent content;

- Part 6: Test methods for gaseous contaminant content;

- Part 7: Test method for viable microbiological contaminant content.

This document replaces GB/T 13277.1-2008 Compressed air - Part 1: Contaminants and purity classes. Compared with GB/T 13277.1-2008, apart from structural adjustments and editorial changes, the main technical changes are as follows:

a) the terms and definitions of "lubricant/coolant" and "microbiological contaminants" have been added (see 3.1, 3.2);

b) the indices of the particle classes in compressed air have been changed (see Table 1; Table 2 of the 2008 edition);

c) the indices of the liquid water classes in compressed air have been changed (see Table 2; Table 4 of the 2008 edition);

d) the indices of the total oil content classes in compressed air have been changed (see Table 3; Table 5 of the 2008 edition).

This document is modified in relation to ISO 8573-1:2010 Compressed air - Part 1: Contaminants and purity classes.

The technical differences between this document and ISO 8573-1:2010 and their reasons are as follows:

- ISO 7183 has been replaced by the normatively referenced GB/T 10893.1 (see Clause 3), to adapt to the technical conditions of China and improve operability;

- ISO 8573-7 has been replaced by the normatively referenced GB/T 13277.7 (see Clause 3 and 5.6), to adapt to the technical conditions of China and improve operability;

- the normative reference JB/T 7664 has been added, JB/T 7664 is referenced in the clause "Terms and definitions", and Clause 3 of ISO 8573-1:2010 has been deleted (see Clause 3), to ensure consistency with the edition before revision;

- ISO 8573-4 has been replaced by the normatively referenced GB/T 13277.4 (see 5.2), to adapt to the technical conditions of China and improve operability;

- ISO 8573-3 has been replaced by the normatively referenced GB/T 13277.3 (see 5.3), to adapt to the technical conditions of China and improve operability;

- ISO 8573-2 has been replaced by the normatively referenced GB/T 13277.2 (see 5.4), to adapt to the technical conditions of China and improve operability;

- ISO 8573-5 has been replaced by the normatively referenced GB/T 13277.5 (see 5.4), to adapt to the technical conditions of China and improve operability;

- ISO 8573-6 has been replaced by the normatively referenced GB/T 13277.6 (see 5.5), to adapt to the technical conditions of China and improve operability.

The following editorial changes have been made to this document:

- the wording of the scope in Clause 1 has been changed to comply with GB/T 1.1-2020;

- "reference conditions" in Clause 4 has been changed to "standard state", for consistency with the other parts of GB/T 13277.

Attention is drawn to the possibility that some contents of this document may involve patents. The issuing body of this document does not assume responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee for Standardization of Compressors (SAC/TC 145).

Drafting organizations of this document: Hefei General Machinery Research Institute Co., Ltd., Dongguan Taian Yiqiao Technology Equipment Co., Ltd., Hanyue Purification Equipment (Zhejiang) Co., Ltd., Zhongshan Lingyu Machinery Co., Ltd., Shenzhen Hongrijia Purification Equipment Technology Co., Ltd., Chongqing Baosi Purification Equipment Technology Co., Ltd., Fujian Yipusi Industrial Co., Ltd., Hefei General Machinery and Electrical Products Inspection Institute Co., Ltd., Hangzhou Shanli Purification Equipment Co., Ltd., Degrui (Nantong) Compressed Air Purification Equipment Co., Ltd.

This document was first published in 1991 and first revised in 2008; this is the second revision.

Introduction

Compressed air produced by compressors contains various contaminants, mainly including particles, water, oil, gaseous contaminants and viable microorganisms, which have various adverse effects at different points of use. In order to adapt to the development of compressed air purification equipment and to meet the needs of equipment using compressed air, the formulation of standards for compressed air quality measurement methods has become an important task in the field of compressed air purification. GB/T 13277 aims to establish measurement methods generally applicable to the various types of contaminants in compressed air, and is intended to consist of 9 parts.

- Part 1: Contaminants and purity classes. The purpose is to describe the various types of contaminants in compressed air and to propose methods of describing them.

- Part 2: Test methods for oil aerosol content. The purpose is to provide an operable and highly reliable method for measuring the oil aerosol content in compressed air.

- Part 3: Test methods for measurement of humidity. The purpose is to provide an operable and highly reliable method for measuring the gaseous water content in compressed air.

- Part 4: Test methods for solid particle content. The purpose is to provide an operable and highly reliable method for measuring the count concentration of solid particles in compressed air.

- Part 5: Test methods for oil vapour and organic solvent content. The purpose is to provide an operable and highly reliable method for measuring the concentration of contaminants such as oil vapour in compressed air.

- Part 6: Test methods for gaseous contaminant content. The purpose is to provide an operable and highly reliable method for measuring the concentration of gaseous contaminants such as carbon monoxide and carbon dioxide in compressed air.

- Part 7: Test method for viable microbiological contaminant content. The purpose is to provide an operable and highly reliable method for measuring the viable microorganism content in compressed air.

- Part 8: Test methods for solid particle content by mass concentration. The purpose is to provide an operable and highly reliable method for measuring the mass concentration of solid particles in compressed air.

- Part 9: Test methods for liquid water content. The purpose is to provide an operable and highly reliable method for measuring the liquid water content in compressed air.

1 Scope

This document specifies the purity classes of particles, water and oil in compressed air and the methods of describing viable microorganisms and gaseous contaminants.

This document applies to the purity classification and description of contaminants in compressed air.

Note: The contaminant purity classes specified in this document are independent of the location in the compressed air system at which the air is specified or measured. This document describes basic information on contaminants in compressed air systems and, together with the other parts of GB/T 13277, specifies the compressed air purity class requirements and their measurement methods. Annex A gives guidance for the application of this document.

2 Normative references

The contents of the following documents constitute indispensable provisions of this document through normative references in the text. For dated references, only the edition corresponding to that date applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 10893.1 Compressed air dryers - Part 1: Specifications and testing (GB/T 10893.1-2012, ISO 7183:2007, MOD)

GB/T 13277.2 Compressed air - Part 2: Test methods for oil aerosol content (GB/T 13277.2-2015, ISO 8573-2:2007, MOD)

GB/T 13277.3 Compressed air - Part 3: Test methods for measurement of humidity (GB/T 13277.3-2015, ISO 8573-3:1999, MOD)

GB/T 13277.4 Compressed air - Part 4: Test methods for solid particle content (GB/T 13277.4-2015, ISO 8573-4:2001, MOD)

GB/T 13277.5 Compressed air - Part 5: Test methods for oil vapour and organic solvent content (GB/T 13277.5-2019, ISO 8573-5:2001, MOD)

GB/T 13277.6 Compressed air - Part 6: Test methods for gaseous contaminant content (GB/T 13277.6-2021, ISO 8573-6:2003, MOD)

GB/T 13277.7 Compressed air - Part 7: Test method for viable microbiological contaminant content (GB/T 13277.7-2021, ISO 8573-7:2003, MOD)

JB/T 7664 Compressed air purification - Terminology

ISO 8573-8 Compressed air - Part 8: Test methods for solid particle content by mass concentration

ISO 8573-9 Compressed air - Part 9: Test methods for liquid water content

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 10893.1, GB/T 13277.7 and JB/T 7664 and the following apply.

4 Standard state

The standard state of gas volume shall be as follows:

- air temperature: 20 °C;

- absolute air pressure: 0.1 MPa(a);

- relative water vapour pressure: 0.