This standard specifies the pressure and characteristics, test methods, packaging, marking, etc. of aviation breathing oxygen products. This standard applies to gaseous oxygen and liquid oxygen produced by cryogenic separation of air, mainly used for breathing by aviation personnel. GB 8983-1998 Respiratory oxygen for aviation GB8983-1998 Standard download and decompression password: www.bzxz.net

GB8983--1998
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Preface
This standard is a reference to GB8983--1988 "Oxygen for Respiratory Use in Aviation" and GB/T8986-1988 "Test Methods for Respiratory Oxygen for Medical and Aviation Use" revision.
This revision retains the main relevant technical content of GB8983-1988 and GB/T8986-1988, but adds liquid oxygen to the scope of application, and also adds technical content related to liquid oxygen sampling, packaging, storage and transportation, etc. The expression of moisture content in the characteristics is changed to dew point. This standard is equivalent to the international standard ISO2046:1973 "Oxygen for Aviation Breathing". This standard will replace GB8983--1988 and GB/T8986-1988 from the date of implementation. This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Southwest Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by: Southwest Research Institute of Chemical Industry of the Ministry of Chemical Industry, Chengdu Aviation Station No. 4, and West China University of Medical Sciences. The main drafters of this standard: Zhou Pengyun and Wang Xiaoou. 737
1 Scope 13
National Standard of the People's Republic of China
Breathing oxygen supplies for aircraftGB
8983 - 1998||tt| |eqv IS0 2046: 1973
Replaces GB8983-1988
GB/T 8986-1988
This standard specifies the pressure and characteristics, test methods and packaging, logo etc. This standard applies to gaseous oxygen and liquid oxygen produced by cryogenic separation of air, mainly used for breathing by aviation personnel. Molecular formula: 02
Relative molecular mass: 31.999 (according to the 1995 international relative atomic mass) 2 Referenced standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard . At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T5832.2--1986 Determination of trace moisture in gases Dew point method GB8982-1998 Medical oxygen
GB/T8984.3--1997 Determination of oxidized carbon, carbon dioxide and hydrocarbons in gases Part 3:
Determination of total hydrocarbons in the gas by flame ionization method
3 Pressure
The oxygen pressure should be able to charge the aircraft's oxygen system to the maximum working pressure. 4 Characteristics
4.1 Purity
The minimum purity of oxygen should be 99.5% (V/V). Residues should comply with the regulations on moisture, odor, flammability, toxicity and solid matter in Articles 4.2~4.5.
4.2 Moisture 3
At 15C and 101.3kPa pressure, the moisture content in oxygen should not exceed -63.4℃ according to the dew point. Note: Depending on the operating conditions, for example, if the ambient temperature of the surface of the oxygen system that is not frequently used is higher than a certain minimum value, a higher water content may be allowed for some aircraft, but the dew point measured at the outlet of the aircraft oxygen system cannot exceed -53C. 4.3 Odor
Use membrane sense organs to judge that oxygen should have no odor. 4.4 Flammability and toxicity www.bzxz.net
At 15C and 101.3kPa pressure, the total hydrocarbon content should not exceed 60×10-6 (V/V) by volume. Total contamination should be addressed using instructions:
1] Added liquid oxygen.
2] No comments are used.
3 Moisture content is expressed in dew point.
The State Administration of Quality and Technical Supervision approved 738
1999-04-01 and implemented
will not produce toxicity.
4.5 Solid substances
GB 8983 --- 1998
Oxygen should not contain particles larger than 100μm. At 15C and 101.3kPa pressure, the total mass of solid matter should not exceed 1 mg/m*.
5 Inspection Rules 1
shall be implemented in accordance with Chapter 4 of GB8982-1998. 6 Test method 2}
6.1 Determination of oxygen content
In accordance with the provisions of GB8982-19985.1. 6.2 Determination of moisture
shall be carried out in accordance with the provisions of GB/T5832.2.
6.3 Determination of odor
According to the provisions of GB8982-19985.7. 6.4 Determination of total hydrocarbon content
shall be carried out in accordance with Chapter 3 of GB8984.3-1997. 6.5 Determination of solid matter
6.5.1 Determination of solid matter content
6.5.1.1 Methods and principles
Determination by filter paper sampling and weighing method. Let a certain amount of sample gas pass through the dust collector equipped with filter paper. According to the volume of sample gas passing through and the mass difference before and after filter paper ventilation, calculate the content of solid matter, 6.5.1.2 Instruments and materials
Cumulative formula Barometer.
Dust collector: as shown in Figure 1.
3
1---Filter paper 2—Metal mesh? 3--Filter paper holder Figure 1 Round filter paper dust trap
Filter paper: ultra-fine glass fiber filter paper or Polypropylene synthetic fiber filter paper. The gas after passing through the filter paper should not contain solid matter larger than 1um (including 1 μm).
6.5.1.3 Preparation before analysis
Wash and dry the dust collector.
Cut the filter paper into a round shape, weigh it (accurate to 0.1mg), and then place it in the filter paper holder. The weighed filter paper should prevent dust from adhering to it and use instructions:
1 ]This chapter is newly added.
2This chapter is newly added.
739
Other impurities (such as water).
GB 8983-1998
Connect the cylinder containing the sample gas, the dust collector and the flow meter in sequence with pipelines that do not adhere to dust and water. 6.5.1.4 Analysis
Open the sample gas cylinder and adjust the flow rate to be within the rated value of the flow meter. Pass the sample gas for more than 1m, take out the filter paper and weigh it (accurate to 0.1mg). The difference between the relative humidity in the balance chamber and the relative humidity when the filter paper is first weighed should not exceed 10%.
6.5.1.5 Result processing
The solid matter content in oxygen is calculated according to formula (1): m.
Solid matter content, mg/m;
Mass of filter paper before sampling, mg;
Mass of filter paper after sampling, mg;
m2||tt ||m
—converted to the sampling volume at 15℃ and 101.3kPa pressure, m. 6.5.2 Determination of the size of solid particles
Place the filter paper weighed in 6.5.1.4 under a microscope that magnifies it approximately 40 times. There should be no particles larger than 100m. Packaging, safety
7
According to the provisions of Chapter 5 of GB8982-1998, but the words "Medical Oxygen" on the cylinder should be changed to the words "Aviation Oxygen". Adoption instructions:
1] This chapter is newly added.
740
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