JB/T 9142-1999 Technical requirements for corrosion-resistant asbestos packing for valves

JB/T 9142-1999 JB/T 9142-1999 Technical conditions for corrosion-inhibiting asbestos packing for valves JB/T9142-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/I9142-1999
Specification for anticorrosive ashestospacking for valve
Published on 1999-06-28
National Mechanical Industry Week
2000-01-01 Implementation
JB.T9142-1999www.bzxz.net
This standard is a revision of ZBJ22020-90 "Technical Conditions for Corrosion Inhibiting Asbestos Packing for Valves". During the revision, the original standard was edited and modified, and the main technical content remained unchanged. This standard replaces ZBJ22020-90 from the date of implementation. This standard is formulated and attributed to the Technical Committee for Standardization of Static Seals for Packings. The origin of this standard is: Taiwan General Anti-corrosion Machinery Research Institute, and the main drafter of the technical standard is:
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Corrosion Inhibiting Asbestos Packing for Valves
Specifkcation foraatirurrusive aabrstospacking far vahe
This standard specifies the code, classification, technical requirements and test results of short-corrosion asbestos packing for valves. This standard is applicable to short-corrosion asbestos packing for valves. 2 Referenced standards
JB/T9142-1999
The following standards contain provisions that constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid, and all marked parts will be revised. All parties using this standard should refer to the latest technical version of the standard below. Possibility B/T9143-1999 Corrosion-resistant cotton packing yarn test method JC/T331--1982
3 Code
Packing physical and chemical properties test method
HXS-corrosion-resistant rubber amine asbestos material:
Corrosion-resistant oil-resistant cotton packing.
Warm corrosion asbestos packing classification
4.1 Grade corrosion asbestos packing is divided into potato-corrosion-resistant rubber asbestos material and corrosion-resistant oil-resistant cotton packing 4.2 Strong base rubber cotton packing is divided into four scopes of application Type of convex, corrosion-inhibiting oil-free asbestos filler is divided into two types of brands, see Table 1 Table 1 Applicable pool enclosure
Applicable range
1x3450
HXSI50
Water, steam
Water, steam
Technical requirements
HX5310
HYS350
J1YS250
5.1 Grade corrosion-resistant asbestos environment material size specifications and tolerances should be In accordance with the ruling in Table 2, the National Machinery and Fuel Industry Bureau approved the price on 1999-06-28 for water, steam and suitable standard for products, water, steam and steam. Products, water, steam and steam SS: 250. 2000-01-01 Guangshi actual material case Emco JB/T9142—1999 Dimensional specifications and tolerances for rod diameter! Filling study
Filling light separation
Reading rod point diameter
Short seal wine
5.2 The density of corrosion-resistant asbestos filler should not be less than 0.9g/cm, and the density of corrosion-resistant asbestos filler with metal wire should not be less than 1.1g/cm5.3 The corrosion performance of short-circuited asbestos filler, under the condition of temperature 559±2% and relative humidity 95%3%, after 5*24h test, it should not be 35 steel dust corrosion
5.4 The surface of the corrosion-resistant asbestos filler should be flat, evenly distributed, not contaminated with dust and impurities, and should not have any powder. The exposed wire should not be more than one in the jumper. The outer skin joint must be tightly fitted and not allowed to connect to the inside of other parts.
The burning loss of rubber asbestos filler meets the requirements of Table 3. 5.5
Table 3 Environmental loss
HXS550
ILXS450
Low-carbon material loss
HXS35H
Heat-resistant type
TXS550
HX5450
HX5359
No gold effect
Moisture-resistant type
HDK5250
I[YS350
HYS250
With or without metal wire
The content of asbestos filler (including love and agent) should be 25%~45% 5.
Snakehead fish
The maximum resistance
5. The slow-moving monolithic filler should be rolled into a coil shape, and the inner diameter of the coil should be no less than 5 times the material specification. The coiled material should have a section of not less than 1 per centimeter
6 Test method
JB/T9142—1999
! The size of the asbestos end material should be measured with a vernier caliper with a diameter of 0.02m and two parallel points. The middle point of the filling is taken as the starting point. After the required number of measurements, the average value of the sieve method at one point is taken as the test result. 6.1 According to the determination of asbestos shedding micro-degree, loss, heat resistance loss, and leaching agent content, all shall be in accordance with the provisions of 71331: 6.3 The separation test of cotton materials shall be in accordance with the provisions of R9:43. The inspection rules are as follows: Each tray of grade cotton filler shall be inspected for appearance and size. 7.2 The inspection items of the slow-screen material shall be in accordance with the provisions of 5.! ~5.8. 7.3 Products of the same net number and specification are counted as one unit with 200k. If less than 200k, one unit shall be counted. In the demonstration batch, any product that has been inspected and confirmed by the inspection shall be three widths. In each tray, the length shall not be less than 200k. If the length is less than 150m, the physical and chemical performance test shall be conducted. The length of the sample under the specification of 10 shall be able to be collected.
7. If the raw materials, distribution, process, etc. of asbestos filler are not stable, the manufacturing unit shall conduct a corrosion test once a month. If any of the indicators are unqualified, a number of test groups shall be taken to re-test the project. If the re-test result is still unqualified, the product shall be regarded as unqualified.
*Marking, packaging and storage
3.1 Each box of products has a shipping list, and the shipping list shall indicate: 1) the manufacturer's name and trademark :
b) Product name:
Product price:
lGross weight and net weight:
e) Manufacturing date and production label
8.1 Inspection certificate
The inspection certificate should clearly indicate the inspection date, period, results and the inspector’s seal or code stamp: 8.3 The slow-release cotton materials should be packed in low boxes with plastic tape and tied firmly. The box should not be packed for more than 25 years. 8.4 The products should be stored in a dry warehouse and strictly away from baking, exposure to sunlight, rain and rain. The storage period is generally from the first day of production and should not exceed 2 years.
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