Some standard content:
ICS.73.080
National Standard of the People's Republic of China
GB/T 80712007
Chrysotile asbestos
2001-04-29 Issued
National Quality Inspection Bureau of the People's Republic of China
2001-10-01 Implementation
GB/T8071—2001
GB80?1967 Yiyou Cotton Nepal adopted the Canadian cotton grading standard, the Canadian Jones·Mianwei Company product standard and the Japanese Union and other national standards: the original standard promotes the products to be divided into three types according to the domestic and foreign production conditions: superior products, first-class products and qualified products. In the spirit of referring to foreign advanced standards and considering the changes in the grade of domestic ore to promote the technological progress of enterprises, the GH/T8071-198 Wenshi Comb 3 standard is revised. This standard is revised as follows, while trying to maintain the original standard and combining the implementation of the standard in recent years: 1. Cancel the classification of superior products, inferior products, and qualified products: 2. The cotton is divided into horizontal fiber and longitudinal fiber web categories: 3. According to the industry plan, the cost-effective products are replaced by the name of the text, and the relevant term definitions are added: 4. Cancel the ratio table test quality index, and add the loose cotton content quality index. 5. Add the commercial single-use washing test. Use rice to determine the dust content! 6. Improve the particle determination method! 7. The inspection rules are deleted and rewritten. 8. Appendix A and Appendix B of this standard are both standard appendices. This standard replaces G1/T8071-198 from the month of implementation. This standard is proposed by the State Administration of Building Materials Industry. The State Administration of Building Materials Industry Duyang Non-metallic Mineral Research and Design Institute is responsible for drafting this standard, the State Administration of Building Materials Industry Duyang Non-metallic Mineral Research and Design Institute, Yangyang Non-metallic Mineral Chemical Research Institute, and Qiyan City Jinjiang Sealing and Insulation Products Nest Group Co., Ltd. The main authors of this standard are: Wang Weisheng, Shang Xingchun, Xu Azhi. This standard has 11 units? First published on July 15, 2001: 1 Scope
National Standard of the People's Republic of China
Chrysutile asbestos
GA/T 8071—2001
Registered on behalf of GB/T B0TI--:8?
This standard specifies the definitions of certain terms, product classification and specification, technical requirements, test methods, inspection rules, packaging, marking, storage and transportation, etc.
This standard applies to the quality classification and inspection of wet asbestos products. Other asbestos may also be adopted for reference. 2 Cited standards
The texts contained in the following standards shall constitute the text of this standard by being cited in this standard: When this standard is published, the versions shown are valid. All standards will be considered. Parties using these standards should consider using the latest versions of the following standards. GB/T664G.1-1986 Method for grading chrysotile fibers by ten-step method GB/3\6646.2—1986 Method for wet sorting of chrysotile fibers GB/T6646.3—1HS6 Method for quick-dispersion sorting of chrysotile fibers by length GR/6646.5—1.9RG Method for determination of the content of sand and undissociated asbestos in chrysotile fibers CB/T 6646.6—1986
Method for determination of moisture content of chrysotile asbestos
GB8072-2987 Method for sampling and mixing chrysotile asbestos; B/T8073—1987 Method for determination of moisture content of chrysotile asbestos by wet method 3 Definitions
3.1 Chrysotile asbestos is a fibrous hydrous magnesium silicate, known in mineralogy as fibrous chrysotile, with a molecular formula of Mg(2SiO2).·21, and a theoretical composition of MO43.64%, SiO43.360·13.00%. 3.2 Asbestos fibers
Mineral particles meeting the definition in 3.1, with a length/maximum transverse dimension ratio greater than 1:1 and a maximum inertial dimension less than .mm, are called asbestos fibers.
3.3 Longitudinal Fiber
Fiber with its fiber length parallel to the plane of the ore vein or the ore bed. 3.4 Crosfbc
Stone fiber with its fiber length perpendicular or nearly perpendicular to the plane of the ore vein or the ore bed. 3.5 Hand-selected asbestos rmde axbealos
Natural asbestos obtained by hand refining. 3.6 Milled asbestosbesog
Asbestos fibers of various grades selected from ore by mechanical methods: 3. Sand
Non-fibrous minerals in stone fiber.
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, approved on April 29, 2007 001-3-0
GB/T 8071—2001
Group 3-8 Powders: Fines
The finest particle size obtained by length classification of asbestos red frequency according to recognized test methods. Under normal circumstances, it refers to the special material that has passed the G3/T6646.2 classification method and is classified into a small sieve (c.075mm). 3.9 The main red asbestos content is the accumulated residue on the specified sieve. For the first and second grade asbestos, the sieve hole is 12.> Blade: For the third and fourth grade asbestos, the sieve hole is 4.7>mm, and for the fifth and sixth grade asbestos, the sieve hole is 1.4am3.10 Loose cotton
Loose cotton with high fiber content. 4 Product classification and code
4. 1 Product classification
4.1.1 Based on the mineral processing method, thermal insulation asbestos can be divided into hand-selected asbestos and machine-selected asbestos. Machine-selected asbestos can be divided into two categories:
4.1.2 Hand-selected asbestos fiber can be divided into special grade +, hand-selected grade 2, hand-selected grade 1, and three-selected grade 2. Machine-selected asbestos fiber can be divided into grade 1, grade 2, grade 3, grade 1, grade 5, and grade 6. Machine-selected fiber can be divided into grade 3, grade 1, grade 5, and grade 6. 4.2 Product code and mark
The product code of thermal insulation asbestos is divided into hand-selected grade 1, hand-selected grade 2, sub-selected grade 1, hand-selected grade 2. The product code of thermal insulation asbestos should be composed of a chain identification number (one digit) and a main fiber content identification number (two digits). The letter Z is added after the main fiber content identification number to distinguish it. At the same time, this standard is used as a complete product mark. 5 Technical requirements
5.1 The moisture content (absorbed water) of asbestos products should not be less than 2%. If it exceeds 2, the excess moisture will be deducted during the acceptance measurement. 52 The technical requirements for hand-selected asbestos should comply with the provisions of Table 1, and the technical requirements for machine-selected asbestos should comply with the provisions of Table 2. Table! Hand-held asbestos technology requirements
Product code
Handheld 1st level
Hand-held special 2 settings
Hand-selected 1st section
Things to send 2 numbers
plan "Product code
1-T0(2)
1-6G(2)
1-50()
2-40(z)
3-30(z)
2-20(z)
Average slender length mro
Bio fiber rate measurement, for
Table 8 Machine-sent stone technology requirements
10%
Loose calculation book
Xuanfen, 9%
+1. 1Kmum
. uTs aumoi
1 Age content
Mixed materials
CE/T8C1-200
Table 21 End:
Formula
+12.:m+1. 73m
Product science
420(z)wwW.bzxz.Net
1-tor2)
5-F0(2)
5-60(2)
5-50(2)
8-43(2)
6 Acid test method
-. aomm: - t. zon.n
.aa. 6.1 Determination of the length of asbestos fibers and the sand content 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9=mThe fiber length is measured by a ruler. The fiber content is: the fiber content of each product greater than the average fiber length is the fiber content of the card. Product code: 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade; Sample: GH/T 8071--2C01. Fiber quality determination grade range: T. The average fiber length is calculated according to the formula: Average fiber length - z Xa + xt+×+ xd-xea-b+r+a+e. In the formula, L,,, are respectively the grade fiber lengths, and a,b,,d,e are respectively the fiber lengths of each grade, mm5. .
6.1.3 The age of the disk is obtained by deducting the sum of the dimensions of each needle from the maximum value of the sample (500), which is expressed as the mass fraction of the test piece (). 500-(a.+eta-×
Sand content
The symbols are the same as in formula (1), and the arithmetic mean of three samples is used as the result report: 62 The classification of machine-reverse asbestos and the determination of the amount of pyrolysis impurities shall be carried out in accordance with GB/T6646.1:
6.3 The determination of the content of loose cotton in machine-selected asbestos shall be carried out in accordance with GB/TB073.
6.4 The wet classification of machine-sent asbestos fibers and the determination of -0.075rn dust shall be carried out. 64.1 The test shall be carried out in accordance with GB/T6646.2 or GB/T6646.a. The secondary load test shall be carried out in accordance with GB/T6646.2. (2)
6.4.2 The dust content of 0.075mm in the factory inspection and production control inspection can be recorded in accordance with the standard A (standard Xie The method specified in GB/T 6646.3 is carried out according to the method specified in GB/T 6646.3. After the supplier and the buyer agree, the method in Appendix A can also be used as the inspection method for both parties. 6.4.3 + 1.1 mm content refers to the percentage of fiber retained by the 1.18 mm sieve and above sieves measured by GB/T 6646.2 minus GB/T 6646.9.
6.4.4 Fiber coefficient is calculated by the fiber distribution data provided by GB/T 6646.3 method according to formula (.3), fiber coefficient 4×4+D×3+C×3-D
Where: ABC, D are 2.3mm, 1.18mm, 0.6mm, and 3mm sieve residues.% 6.5 Determination of machine-delivered asbestos particles content
According to Appendix B (Standard Appendix),
6. 5 Moisture determination
Carry out in accordance with GB/T 6646.6.
7 Inspection rules
7-1 Inspection classification
7.1.1 Stone inspection is divided into factory inspection (with gauge inspection, exchange inspection) and type inspection. 7.1.2 Factory inspection items (4)
(3)
Manual selection
Remember! Selected stone
G/T8071-20C1
Loss 4 Factory inspection items
, average single length, body fiber,
Main fiber female. -D. 075 IrmLl 7.1.3 Type inspection: The product shall meet the technical requirements of the relevant departments stipulated in the policy of Shenzhen. 7.1.4 Type inspection shall be carried out when there are the following situations. a) The first batch or trial products:
After the formal production, if the quality of the incoming raw materials and the process control are changed, the production process and equipment are changed, which may affect the product properties:
c) Normal production:
d When the product production is suspended for more than one month, when the production is resumed e When the factory inspection results are significantly different from the results of the previous or subsequent inspections: E) When the user proposes a World Bank type inspection
7.2 Sampling and sample preparation
Asbestos selection and sample preparation shall be carried out according to G[otherwise, 7.3 Judgment rules and re-inspection standards
7.3.1 - The quality of selected asbestos and the labels must meet the requirements of Table 2. 7.3.2 The quality of machine-selected asbestos, the test results of each test specified in Table 4 must meet the corresponding technical requirements specified in Table 2; the test results of all items must meet the technical requirements specified in Table 3. 7.3.3 When the first test results meet the specified technical requirements, samples should be taken for re-inspection. When the double sampling re-inspection results all meet the specified technical requirements, it is judged as qualified; if there is a proof or more than one test result does not meet the specified technical requirements, it is judged as unqualified.
8 Packaging and marking
8.1 The bagged asbestos of machine-selected asbestos is 25kg = 0.5kg, 4ukg 0.±kg.5kg ± 1kg 4.2 The packaging of hand-selected asbestos shall be agreed upon by the supply and demand parties. 4.3 The asbestos packaging bag shall be firm and durable. 4. The packaging bag shall be marked with product mark, trademark, quality, production unit and protective test mark. Each bag should have a certificate of conformity. The certificate should contain product mark, quality, production date (batch number), and production unit. 9 Storage and transportation
9.1 During transportation, cotton products should be protected from turning over, rain and damage. 9.2 Asbestos products should also be stored in a dust-proof and moisture-proof manner. A1 Method Principle
GET8071-201
Yang Lu A
(Standard Supplement)
Rapid determination method for dust content
The test sample is washed with pressure water on the sieve surface. The material remaining on the sieve is weighed and the sample weight is calculated as the cumulative content result. This method is applicable to the first-level machine with full standard specifications and A2 test device and material
A2-1 standard sieve; diameter 200n1m, sieve hole C.U73mn1, the standard sieve should have a support net with an aperture of 1.68mm and a sieve seat with a protective code and drainage.
42.2 The common water system can ensure a constant flow of clean water. The soft bone with a diameter of Em~13mml is used to make the screen surface (127-7)m with a low biting number. 42.3 Water spray belt: as shown in Figure A1.
Figure 1 Water nozzle
A2.4 It has a certain temperature strength quantitative rapid filter paper, A2.5 Drying press or infrared frequency machine:
A2.6 Balance sensor 0.01g.
42.7 Stopwatch
A2.8 Wash bottle, 30)mL ane cup, each gram
13 Sample and test equipment adjustment
A3-1 Test Y
Sampling and sample preparation according to 8071, the sample shall not have obvious sand and case trees, the sample is dried and kept constant except for two samples with a mass of (70±U.C5g),
13.2 Test equipment adjustment
A3.2.1 The water-saving speed of the test equipment is (139+7)kPaS
GB/T 8071-2001
A3.2.2 The time required for 2 liters of water to pass through the nozzle is determined by comparing the mixing water of the nozzle. The time required for 2T-water washing through the nozzle must be between 23-366, otherwise it should be adjusted.
A4. Test procedures
4.1 Test device After the test, place the clean standard filter on the filter holder, turn on the water supply and use the filter to make the sieve completely clean. A4.2 Place the test filter in a beaker with 100ml of water and soak for 4 minutes. After stirring with a rod for 1 minute, immediately filter it into the standard filter within 15 seconds.
|44.3 While the test mix is pouring into the standard sieve, start the timing and rotate the nozzle to flush. During the flushing, the nozzle should be kept away from the screen (127 ± 7mB). The nozzle should be alternately pressed in a counterclockwise and clockwise direction to ensure that the fibers are evenly flushed. A4.4 If there is a blockage on the sieve surface and the water surface is blocked, the nozzle should be flushed at an angle to the blocked position to overcome the blockage. A4.5 After flushing 120%, stop the water supply and expand the remaining fibers on the sieve. 4.6 Transfer the heat energy and the residue into a flat combustion box at (105 ± 5) and bake until it is dry. A4.7 Calculation:
Wu Zhong, r
0.075mm powder content: %
---sample mass + F
---the mass of the filter paper and the residue after drying
A4.8T reversely rinse the standard sieve of the disinfection method, and rinse the second sample according to the reverse procedure. A:
A4.9 If the difference in mass of the two samples is greater than 1.2, a third sample is prepared for random testing. . Take two properties with a difference of not more than .28 in the mass of the residue and calculate them, and use their arithmetic half mean as the test result report value. Appendix B (Appendix to the standard) Sand content determination method Method principle This method is to combine the determination of stone fiber sand with the classification of the following formula in Section B 6646.1. The determination is divided into two stages. The first stage is the second and blue layers of the sieve (10.1) in the dry classification test.40mm> The sand particles in the sieve residue are manually picked out and then the 1.40 material is filled to the bottom after being heated for a period of time! After the mud sample is cut into pieces, a 10g sample is obtained according to G/T646.5 method. B2 or test procedure
B2.1 When the car is tested according to GB/r6646.1, the sieve residues of 22.5mm, 4.75mm1, and 1.40u2 sieves are spread out separately, and the particles that are swept out are weighed together.
B2-2 The 2.40mm material tested according to G1/TF4h.1 is mixed with a cup and reduced to about 10.5% by quartering. After the viscosity is determined according to GL/6646.5, the basic quantity is determined. In the case of a short fiber sample, it is not necessary to carry out Article 6.7 (height of the particle size) of H/16546.A in the secondary determination. B2.3 The content of granular material is calculated by the following formula: W: W, the residue of 12.5mm, 4.75mm and 1.40mm sieves are respectively the mass of sand or K, t;, the mass of residue at the end of 1.40mm sieve is respectively the mass of -1.40mm material (cat bottom) and the mass of -1.40mm material (cat bottom) are respectively the mass of sand or K, t;, the mass of residue at the end of 1.40mm sieve is respectively the mass of sand or K, t; - the mass of sand or K, t; - the mass of sand or K, t; - the mass of -1.40mm material (cat bottom) is respectively the mass of -1.40mm material (cat bottom) and the mass of -1.40mm material (cat bottom) are respectively the mass of sand or K, t;
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