GB/T 13277.1-2008 English PDF (GB/T13277.1-2008)

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GB/T 13277.1-2008: Compressed air -- Part 1: Contaminants and purity classes
GB/T 13277.1-2008
Compressed air - Part 1.Contaminants and purity classes
ICS 23.140
J72
National Standards of People's Republic of China
GB/T 13277.1-2008
Partially replace GB/T 13277-1991
Compressed air Part 1.Pollutant purification grade
(ISO 8573-1..2001, MOD)
2008-08-28 released
2009-03-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Issued by China National Standardization Administration
Foreword
GB/T 13277 "Compressed Air" is divided into the following nine parts.
---Part 1.Pollutant purification grade;
---Part 2.Measuring method of suspended oil content;
---Part 3.Humidity measurement method;
---Part 4.Methods for measuring solid particles;
---Part 5.Measurement methods for oil vapor and organic solvents;
---Part 6.Method for measuring the content of gaseous pollutants;
---Part 7.Methods for measuring the content of active microorganisms;
---Part 8.Measurement method of solid particle mass concentration;
---Part 9.Methods for measuring liquid water content.
This part is part 1 of GB/T 13277.
This part of the revision adopts ISO 8573-1..2001 "Compressed Air Part 1.Pollutant Purification Level" (English version).
This part was redrafted in accordance with ISO 8573-1.2001.
Taking into account my country's national conditions, this part made some amendments when adopting ISO 8573-1.2001.Relevant technical differences have been incorporated into the text
And mark them with vertical single lines in the margins of the clauses they refer to.
For ease of use, this section also made the following editorial changes.
--- The word "this International Standard" is changed to "this part";
---Replace the comma "," as a decimal point with a decimal point ".";
--- Pressure unit uses "MPa" instead of "bar";
--- Delete ISO 8573-1..2001 foreword.
This part is a revision of the original GB/T 13277-1991 "General Compressed Air Quality Level".
Compared with GB/T 13277-1991, the main changes in this part are as follows.
--- Modified the parameters of the standard state;
--- Increase the number of solid particles;
---Increase the level index of liquid water;
--- Cancelled the lowest level 5 in the original content level;
--- Deleted Appendix A of the original reference.
This part replaces part of GB/T 13277-1991 from the date of implementation.
This part is proposed by China Machinery Industry Federation.
This part is under the jurisdiction of the National Compressor Standardization Technical Committee (SAC/TC145).
This section was drafted. Hefei General Machinery Research Institute.
The main drafters of this section. Han Junying, Li Jinlu.
The previous editions of the standard replaced by this part are as follows.
---GB/T 13277-1991.
GB/T 13277.1-2008
Compressed air Part 1.Pollutant purification grade
1 Scope
This part of GB/T 13277 specifies the purification level of particles, moisture and trace oil in compressed air.
This section also considers microorganisms and gaseous pollutants.
The gaseous pollutants referred to in this section include. carbon monoxide, carbon dioxide, sulfur dioxide, nitrogen dioxide, nitric oxide and carbon atoms from
Hydrocarbons from C1 to C5.
Note. For some special applications (such as breathing, pharmaceutical, food and beverage air), other pollutants should be considered.
2 Normative references
The clauses in the following documents become the clauses of this part by quoting this part of GB/T 13277.All quotes with dates
Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encourage the achievement of this section
The parties to the agreement study whether the latest versions of these documents are available. For the cited documents without date, the latest version applies to this
section.
GB/T 10893 Specification and test of compressed air dryer 1) (GB/T 10893-1989, eqv ISO 7183.1986)
JB/T 7664 compressed air purification terminology
ISO 8573-2 Compressed air. Part 2.Measuring method of suspended oil content
ISO 8573-3 Compressed Air Part 3.Humidity measurement method
ISO 8573-4 Compressed air. Part 4.Methods for measuring solid particles
ISO 8573-5 Compressed Air Part 5.Measurement methods for oil vapor and organic solvents
ISO 8573-6 Compressed air. Part 6.Method for measuring the content of gaseous pollutants
ISO 8573-7 Compressed air Part 7.Methods for measuring the content of active microorganisms
ISO 8573-8 Compressed Air Part 8.Method for measuring the mass concentration of solid particles
ISO 8573-9 Compressed air Part 9.Method for measuring the content of liquid water
3 Terms and definitions
The terms and definitions established in GB/T 10893) and JB/T 7664 are applicable to this part of GB/T 13277.
1) This standard will be revised. The revised standard number is GB/T 108933.1.
4 Measurement of pollutants
In order to assess the purification level of pollutants in compressed air samples, the corresponding part of the measurement method should be selected in ISO 8573.
---Part 2.Measuring method of suspended oil content;
---Part 3.Humidity measurement method;
---Part 4.Methods for measuring solid particles;
---Part 5.Measurement methods for oil vapor and organic solvents;
---Part 6.Method for measuring the content of gaseous pollutants;
---Part 7.Methods for measuring the content of active microorganisms;
---Part 8.Measurement method of solid particle mass concentration;
---Part 9.Methods for measuring liquid water content.
GB/T 13277.1-2008
The measurement should follow the following rules.
--- Measurements should be taken multiple times in an appropriately long time;
---Measurement should be carried out under actual working pressure and temperature;
---The purification level of the compressed air system refers to the arithmetic average value confirmed after multiple measurements;
---The purification level only represents the condition of the measuring point.
Note. The measurement should be carried out under actual working conditions, otherwise the balance of liquid phase, suspended matter and gas phase will be broken. Liquid oil and water will form a film along the tube wall
Or trickle.
The particles, moisture and oil in the compressed air will change suddenly with the suction state, the wear of the components in the system and the gas flow, pressure,
Changes in temperature and environmental conditions.
Because most measurements are not possible with full airflow, compressed air needs to be sampled. It should be noted that the sample gas
Representation of the overall air quality.
5 Standard state
See Table 1 for standard status.
Table 1 Standard status
Air temperature 20℃
Air pressure 0.1MPa absolute pressure
Relative humidity 0
6 Pollutants
6.1 Overview
The three main pollutants in compressed air are solid particles, water and oil. They will affect each other (for example. solid particles will make water
It aggregates with oil droplets to form larger particles, and oil and water will form a milky substance), and sometimes will precipitate and condense in the pipeline of the compressed air system (such as.
Oil vapor or water vapor). Other pollutants (including organic microorganisms and gaseous pollutants) also need to be considered.
6.2 Solid particles
6.2.1 Overview
The important characteristics of solid particles are described by density, shape, size and hardness.
In order to read correctly, the most important thing is to eliminate the effect of moisture on particle size and quantity.
6.2.2 Measurement parameters
6.2.2.1 Particle size
The particle size measurement is carried out according to the corresponding method.
6.2.2.2 Particle concentration
The measurement of particle concentration shall be carried out in accordance with ISO 8573-4.The measurement of the mass concentration of the particles shall be carried out in accordance with ISO 8573-8.
6.2.2.3 Humidity
The actual humidity measurement is carried out in accordance with ISO 8573-3.
6.3 Moisture
6.3.1 Overview
The air usually contains water vapor. When the air is compressed, the partial pressure of the water vapor also rises, but due to the compressed air
The temperature also rises, so there is no water condensation. When the compressed air is cooled afterwards (eg in the intercooler, aftercooler, piping and pneumatic
During the expansion of compressed air, the water vapor will condense into liquid water, and the water vapor in the air will also become saturated.
6.3.2 Measurement parameters
Humidity measurement should be performed in accordance with ISO 8573-3, and liquid water measurement should be performed in accordance with ISO 8573-9.
GB/T 13277.1-2008
6.4 Oil
6.4.1 Overview
For this part of GB/T 13277, oil in compressed air will be in one of three states (liquid, suspended and oil vapor)
Or exist in many forms.
When considering the content of oil vapor in compressed air, temperature is an important parameter because it affects the ratio of oil vapor to the total oil content.
When measuring oil vapor, you must also pay attention to suspended oil and liquid oil, so that the concentration of different phases can be distinguished. Due to the complexity of oil
The molecular structure should clearly specify the measurement procedures of the test equipment.
6.4.2 Measurement parameters
6.4.2.1 Liquid, suspended and oil vapor
Liquid oil and suspended oil content should be measured in accordance with ISO 8573-2, and oil vapor content should be measured in accordance with ISO 8573-5
get on.
6.4.2.2 Humidity
The actual humidity measurement is carried out in accordance with ISO 8573-3.
6.5 Gaseous pollutants
The atmosphere contains not only common pollutants that can be measured by common methods, but also pollutants that change with changes in the environment and location
Dye. Gaseous pollutants are measured in accordance with ISO 8573-6.
6.6 Organic microorganisms
Organic microorganisms present in the atmosphere are generally considered to be solid pollutants. These organic microorganisms enter
Shrink the air. If organic microorganisms are considered as solid pollutants, the measurement method is in accordance with ISO 8573-4; if it is bacteria, fungi or yeast,
The measurement is performed according to ISO 8573-7.
7 Compressed air purification level
7.1 Solid particle grade
The solid particle grades are shown in Table 2.The measurement methods for grades 0 to 5 are carried out in accordance with ISO 8573-4, and the measurements for grades 6 to 7 are in accordance with
ISO 8573-8.
Table 2 Grades of solid particles
grade
Maximum number of particles per cubic meter
Particle size/μm
concentration/
(Mg/m3)
0 Strict requirements set by equipment users or manufacturers that are higher than level 1
1 Not specified 100 1 0
2 Not specified 10000 10000 10
3 No regulations No regulations 1000 5000
4 No regulation No regulation No regulation 1000
5 No regulations No regulations No regulations.2000
Not applicable Not applicable
6 Not applicable ≤5 ≤5
7 Not applicable ≤40 ≤10
Note 1.The filter coefficient (rate) β related to the grade of solid particles refers to the ratio of the number of particles before the filter to the number of particles after the filter, which can be expressed as
β=1/P, where P is the penetration rate, which represents the ratio of the particle concentration after filtration to before filtration, and the particle size grade is used as the subscript. If β10 = 75, it means
The number of particles with a particle size above 10 μm is 75 times higher before filtration than after filtration.
Note 2.The particle concentration is the value in the state of Table 1.
GB/T 13277.1-2008
7.2 Humidity and liquid water level
See Table 3 for humidity levels and Table 4 for liquid water levels. The measurement of the pressure dew point characterizing the humidity is in accordance with ISO 8573-3.Measurement of liquid water
According to ISO 8573-9.When a lower pressure dew point is required, it should be clearly specified.
Table 3 Humidity levels
Grade pressure dew point/℃
0 Requirements higher than level 1 set by the equipment user or manufacturer
1 ≤-70
2 ≤-40
3 ≤-20
4 ≤＋3
5 ≤＋7
6 ≤＋10
Table 4 Liquid water grade
Grade liquid water concentration CW/(g/m3)
7 CW≤0.5
8 0.5< CW≤5
9 5＜CW≤10
Note. The liquid water concentration is the value in the state of Table 1.
7.3 Oil grade
See Table 5 for oil grade. Suspended oil and liquid oil are measured according to ISO 8573-2, and oil vapor is measured according to ISO 8573-5
Yes, the sum of them is the total oil content.
Table 5 Oil level
grade
Total oil content (liquid oil, suspended oil, oil vapor)/
(Mg/m3)
0 Requirements higher than level 1 set by the equipment user or manufacturer
1 ≤0.01
2 ≤0.1
3 ≤1
4 ≤5
Note. The total oil content is the value in the state of Table 1.
7.4 Gaseous pollutants
Within the scope of this part of GB/T 13277, the measurement of the level of gaseous pollutants is carried out in accordance with ISO 8573-6 and reported as actual values.
7.5 Organic microorganisms
Due to the complexity and diversity of organic microorganisms, ISO 8573 only defines the classification of its grades with or without. in
Within the scope of this part of GB/T 13277, the classification of organic microorganisms is carried out in accordance with ISO 8573-7, and reported according to actual values.
7.6 Representation
At the designated measurement point, the purification level of compressed air pollutants is expressed as follows.
Compressed air purification grade GB/T 13277.1 ABC
GB/T 13277.1-2008
among them.
A---Class of solid particles measured according to ISO 8573-4 (see 7.1);
B --- Humidity and liquid water level measured according to ISO 8573-3 and ISO 8573-9 methods (see 7.2), and the corresponding pressure should be stated
Force value
C-The oil grade corresponding to the total oil content measured in accordance with the ISO 8573-2 and ISO 8573-5 methods (see 7.3).
If there is no stipulation in A...