JB/T 9143-1999 JB/T 9143-1999 Corrosion test method for corrosion-inhibited asbestos filler JB/T9143-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 9143—1999
Test method for corrasive ofanticorrosive asbestos packing
Test method for corrasive ofanticorrosive asbestos packing1999-06-28 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JB.T9143-1999
This standard is a revision of 22021-90 "Test method for corrasive of anticorrosive asbestos packing". At the same time, the original standard has been shortened and revised, and the technical content of the main transformer has not changed. The standard is implemented to replace 2B2221-90. This standard was proposed and approved by the Technical Committee for Standardization of Static Seals of Packings. The unit of this standard is: Hefei General Machinery Research Institute. The main drafter of this standard is: Yang Shuyi.
■Scope
Standard of the Machinery Industry of the People's Republic of Chinabzxz.net
Test Method for Corrosion Test of Wet Asbestos Packing
Test Method for Corrosion Test of Wet Asbestos Packing JB/T9143-1999
122U214I
This standard specifies the equipment, sample specifications, shapes, test depth and test result analysis for corrosion test of wet asbestos packing. This standard is used to test the corrosion performance of general wet asbestos packing. 2 Test Equipment
Temperature and Filter Test Box, the temperature difference should be within ±2°C, the humidity error should be within +3%, 3 Test Equipment and Samples
3. The test equipment is a simulation of the material chisel, as shown in Figure 1. 1—idle: 2—six widths (6 evenly spaced), 3—required: 4—material: 5—outer core; 6—lower core 【Test device
3.1.1 The material of the valve stem is 3s steel, and the surface roughness R value is 1.6um. 3.1.2 The material of the general packing surface is 45 steel, and the surface roughness R value is 6.3μm3.1.3 According to the different specifications of the materials, the valve stem and the lower cover should be replaced. 3.2 Test group grid and shape
3.2. The sample specifications are based on the specifications of the silk packing, and the sample length is based on the specifications of the material box in the test device. Take one circle. 3.2. 2 Each piece of the test device is a group. 3.2.3 Among the products that have passed the appearance inspection, select one plate at random, cut a length of 1.5m respectively, and take sections from different positions according to the length required for the test.
3.2.4 Each test is no less than eleven groups.
Guohao Machinery City Industrial Bureau approved on 193-06-28
2000-01-01 Mai Shi
4 Acid test steps
IB/T9143-1999
4.1 Place the sample in the test device and tighten the screws to make the axial cumulative force reach 1.5MP, so that the block and the valve are tightly fitted. 4.1 Place the test device in a temperature and humidity control box with a temperature of 5%27 and a relative humidity of 95%13%. 4.3 The test time is 5×24h
4.4 After the test, take out the test device, separate the packing from the valve support, put the valve stem in a rust removal solution of 20% sodium hydroxide and 5% zinc, clean the valve fiber surface and dry it. 5 Test results and analysis
35 inclined valve stem, evaluated according to the four damage. Level 1: Keep the original brightness; Level 2: The area of ​​the material contact part is less than 1 meter; Level 1: The material contact part has pitting; Level 2: The filler contact part has serious corrosion. Level 3 and 4 are unqualified. The test report should include the following contents: a) Indicate the adopted standard number; b) Specification, brand and manufacturer of corrosion-inhibiting asbestos filler; c) Model of humidity control box; d) Test sample number and number (temperature, humidity, time); g) Test results: g) Test period and personnel.
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