GB/T 25915.1-2010 English PDF (GBT25915.1-2010)

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GB/T 25915.1-2010: Cleanrooms and associated controlled environments -- Part 1: Classification of air cleanliness
GB/T 25915.1-2010
Cleanrooms and associated controlled environments - Part 1: Classification of air cleanliness
ICS 13.040.35
C70
National Standards of People's Republic of China
Clean room and related controlled environment
Part 1: Air cleanliness class
Released on.2011-01-14
2011-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Issued by China National Standardization Administration
Table of contents
Preface Ⅲ
Introduction Ⅳ
1 Scope 1
2 Terms and definitions 1
3 rank 3
4 Level of verification 4
Appendix A (informative appendix) Figure 6 of cleanliness level table 1
Appendix B (Normative Appendix) Using light scattering discrete particle counter to measure particle cleanliness level 7
Appendix C (Normative Appendix) Statistical Processing of Particle Concentration Data 10
Appendix D (informative appendix) Classification calculation example 12
Appendix E (informative appendix) The diameter and count of particles beyond the threshold range of the classified particle size 16
Appendix F (Informative Appendix) Sequential Sampling Method 18
Reference 21
Preface
GB/T 25915 "Clean Room and Related Controlled Environment" is divided into eight parts.
---Part 1.Air cleanliness grade;
---Part 2.Prove continuous compliance with GB/T 25915.1 testing and monitoring technical conditions;
---Part 3.Detection method;
---Part 4.Design, construction, start-up;
---Part 5.Operation;
---Part 6.Vocabulary;
---Part 7.Isolation device (clean wind hood, glove box, isolator, microenvironment);
---Part 8.Classification of air molecular pollution.
This part is Part 1 of GB/T 25915.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
The translation method used in this part is equivalent to ISO 14644-1.1999 "Clean rooms and related controlled environments-Part 1.Air cleanliness
grade".
This part is proposed and managed by the National Standardization Technical Committee for Cleanrooms and Related Controlled Environments (SAC/TC319).
This part was drafted by China Electronic Engineering Design Institute, Suzhou Clean Room Technology Promotion Center, and China Pharmaceutical and Biological Products Inspection Institute.
Zhejiang Dunan Electromechanical Technology Co., Ltd., Jiangsu Gusu Purification Technology Co., Ltd., Jiangsu Sujing Technology Co., Ltd., Sujing Group Suzhou Antai
Air Technology Co., Ltd., Sinopec Shanghai Engineering Co., Ltd., Shanghai Sanxian Purification Decoration Engineering Co., Ltd., Aisike Air System
Products (Suzhou) Co., Ltd., Suzhou Bihai Yongle Purification Technology Co., Ltd., Nanjing Eco Purification Technology Co., Ltd., Shenzhen Lifeng
Air Conditioning Purification Technology Co., Ltd. participated in the drafting.
The main drafters of this section. Yan Delong, Fan Cunyang, Bai Dongting, Chen Linxin, Hou Yi, Jiang Jiaming, Su Gangmin, Jiang Weikang, Feng Xiaoming,
Zhang Lihai, Jin Zhen, Yang Yixin, Ye Quan.
introduction
Clean rooms and related controlled environments control airborne particles at an appropriate level to complete pollution-sensitive activities. Aviation
Products and processes in industries such as Tian, microelectronics, pharmacy, medical equipment, food, medical and health benefit from the control of suspended pollutants.
The ISO grades specified in this part of GB/T 25915 can be used as technical conditions for air cleanliness in clean rooms and related controlled environments.
This not only stipulates the procedures for determining the concentration of airborne particles, but also stipulates the standard detection methods.
This section defines the particle size range for the particle concentration limit. According to the standard procedures provided in this section, follow
The size of the airborne particle concentration determines the level of cleanliness.
This part is one of a series of standards for clean room and pollution control. In addition to the concentration of airborne particles, in clean rooms and other controlled environments
Many factors must be considered in the design, technical conditions, operation and management of the environment. In other parts of this standard, there are detailed
content.
On some occasions, relevant regulatory agencies may stipulate supplementary policies or restrictions. In this case, it may be necessary to
Method to make appropriate adjustments.
Clean room and related controlled environment
Part 1.Air cleanliness class
1 Scope
This part of GB/T 25915 divides the air cleanliness grades of clean rooms and related controlled environments only on the basis of the concentration of airborne particles in them.
The concentration refers to the total number of particles whose particle size is greater than or equal to the threshold (lower limit) particle size, and the prescribed threshold (lower limit) particle size is 0.1μm~5μm.
This section does not establish a cleanliness level for the total number of particles outside the specified particle size of 0.1μm~5μm. But you can use U descriptor and M to describe
Descriptors, respectively express the total number of ultrafine particles (< 0.1μm) and large particles (>5μm).
This section cannot be used to describe the physical, chemical, radiological or survival characteristics of airborne particles.
Note. The actual distribution of particle concentration greater than or equal to a certain size is generally difficult to predict, and usually changes with time.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1 General
2.1.1
Cleanroom
A room with a controlled concentration of suspended particles in the air is constructed and used in a way that minimizes the number of particles that enter, produce, and stay in the room.
The internal temperature, humidity, pressure and other related parameters are controlled as required.
2.1.2
Cleanzone
A dedicated space with a controlled concentration of suspended particles in the air is constructed and used in a way that minimizes the number of particles that enter, produce, and stay in the area.
The internal temperature, humidity, pressure and other related parameters are controlled as required.
Note. The clean area can be open or closed, either in the clean room or not.
2.1.3
Facilities instalation
All related structures, air handling systems and clean rooms for services and public systems, or one or several such clean areas.
2.1.4
Classification
Classification of cleanliness
The level of cleanliness (or regulations, determine the water
Flat process). The cleanliness class represents the maximum allowable concentration of particles of interest (expressed as the number of particles per cubic meter of air).
Note 1.For the calculation of concentration, see Equation (1) in 3.2.
Note 2.The scope of this part of the grade is limited to ISO 1~ISO 9 grade.
Note 3.The grade of concern in this section is limited to the range of 0.1μm~5μm (lower threshold). Specify the air cleanliness of the threshold particle size beyond this range, you can
Use U descriptor and M descriptor (see 2.3.1 and 2.3.2) to describe and explain (but not classified).
Note 4.ISO grades can have decimals, the smallest increment is 0.1, that is, ISO 1.1 to ISO 8.9.
Note 5.The cleanliness level can be applied to all three occupancy states (see 2.4).
2.2 Airborne particles
2.2.1
Particle
Cumulative solid or liquid substances whose particle size threshold (lower limit) is in the range of 0.1 μm to 5 μm.
2.2.2
Particlesize
The dia...