This standard specifies the type classification, technical requirements, test methods and inspection rules of carbon fiber, carbonized fiber type I and carbonized fiber type II impregnated with polytetrafluoroethylene braided packing. This standard is applicable to carbon fiber, carbonized fiber type I and type II impregnated with polytetrafluoroethylene or impregnated with lubricating oil braided and molded packing. JB/T 6627-1993 Carbon (chemical) fiber impregnated with polytetrafluoroethylene braided packing JB/T6627-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 6627-1993
Carbon (chemical) fiber impregnated with polytetrafluoroethylene
Braided packing
Published on May 7, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Carbon (chemical) fiber impregnated with polytetrafluoroethylene
Braided packing
Subject content and scope of application
JB/T 66271993
This standard specifies the model classification, technical requirements, test methods and inspection rules of carbon fiber, carbonized fiber type I and phosphating fiber type II impregnated with polytetrafluoroethylene wall shrinkage packing. This standard is applicable to carbon fiber, carbonized fiber type I and type IIIIII impregnated with polytetrafluoroethylene or impregnated with lubricating oil braided and molded packing. 2 Reference standards
GB2828
JB/T6371
Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) Test method for carbonized fiber braided packing
The model of carbon (chemical) fiber braided packing consists of uppercase Chinese phonetic letters and Arabic numerals, and the expression method is as follows: 口口口
Padding type: 1 is textile packing: 2 is molded packing ring Filling material code, expressed in numbers, see Table 1 Impregnation material code, expressed in numbers, see Table 2 Carbon fiber and carbonized fiber code, expressed in numbers, see Table 3 Basic code table 1 of carbon (chemical) fiber textile packing
Impregnated or coated material
Model example:||tt ||Contains no filling material
Contains no impregnating material
Polytetrafluoroethylene fiber
Polytetrafluoroethylene emulsion
Carbon fiber
Carbon fiber impregnated with lubricating oil Molded packing ring: T1202 Approved by the Ministry of Machinery Industry on 1993-05-07
Lubricating oil
Flexible stone
Carbonized fiber type
Cotton fiber
Molybdenum disulfide
Carbonized fiber type II
Implemented on 1994-01-01
Product classification
JB/T6627-1993
Carbon (chemical) fiber impregnated with polytetrafluoroethylene braided packing and molded packing are divided into six types, see Table 4. Table 4
5 Technical requirements
Maximum operating temperature~
≤345
≤345
≤300
≤260
≤260
Applicable media
Solvent, acid, alkali pH: 1~14
Solvent, acid, alkali pH: 1~14
Solvent, acid, alkali pH: 114
Solvent, acid, alkali pH: 1~14
Solvent, weak acid, weak alkali pH: 2~12
Solvent, weak acid, weak alkali pH: 2~12
Solvent, weak acid, weak alkali pH: 2~12
For square section specifications and dimensional deviations of carbon (chemical) fiber impregnated polytetrafluoroethylene braided packing, see Table 5. Table 5
Specifications and dimensional deviations of carbon (chemical) fiber impregnated polytetrafluoroethylene braided packing molded rings, see Table 6. Table 6
101200
10~150
151250
The mechanical properties shall comply with the provisions of Table 7.
Physical properties of carbon (chemical) fiber impregnated polytetrafluoroethylene braided packing: Table 7
Volume density g/om
345±10℃
Heat loss%
300±10°℃
260±10°℃
Friction coefficient
Abrasion loss9
Compression rate%
Rebound rate%
Acid loss
%(5% sulfuric acid)
Alkali loss%
25%NaOH
5%NaOH
JB/T6627-1993
5.4 The surface of carbon fiber braided packing should be flat, and the impregnated polytetrafluoroethylene emulsion or lubricant should be evenly distributed and should not fall off. There should not be more than one exposed thread, jumper, missing flower, or edge within 10m. 6 Test method
6.1 The specifications of carbon fiber braided packing impregnated with polytetrafluoroethylene shall be measured from two mutually perpendicular directions with a vernier caliper with an accuracy of 0.02mm, and the arithmetic mean shall be taken. Any point of the packing shall be taken as the starting point, and the measurement shall be made once every 1m, and the arithmetic mean of 3 places shall be taken as the test result. For the specifications of packing rings, two points are measured in the symmetrical direction of the diameter of each ring, and the arithmetic mean of the three rings is taken as the test result. 6.2 The tests of bulk density, acid loss, alkali loss, compression rate, rebound rate, heat loss, friction coefficient and wear of carbon (chemical) fiber impregnated polytetrafluoroethylene braided packing are in accordance with the provisions of JB/T6371. 6.3 The appearance quality of braided packing is visually inspected. Inspection rules
1 Products can only leave the factory after being inspected and qualified by the inspection department. 7.1
7.2 Products are divided into factory inspection and type inspection. 7.2.1 The items of factory inspection include: specification and dimensional deviation, bulk density, heat loss, and appearance quality. The items of type inspection are all items specified in Articles 6.1 to 6.4. 7.2.2 Type
7.3 Type inspection should be carried out in any of the following situations: a.
Test new products:
Product transformation:
After formal production, there are major improvements in structure, materials and processes, which may affect product performance d. Normal production for 1 year;
Resume production after suspension for more than 2 months. bzxz.net
7.4 The appearance quality of braided packing should be fully inspected, and the remaining items should be sampled for inspection. 7.5 Products of the same brand and specification are batched with 50kg, and less than 50kg is counted as one batch. When sampling, take out samples of sufficient test quantity from the unit product as the representative of the unit product. Once the sampling plan is implemented, check
7.6 Carbon (chemical) fiber impregnated polytetrafluoroethylene braided packing Article 5.15.3 According to the level specified in GB2828, the qualified quality level AQL is 10, and Article 5.4 adopts full inspection. Marking, packaging, storage
8.1 Marking
The packaging box of carbon fiber impregnated polytetrafluoroethylene braided packing should indicate: a.
Manufacturer name and trademark:
b. Product name:
Product specifications and models;
d. Gross weight and net weight:
Manufacturing date or production batch number.
8.2 Packaging
1 The packaging of carbon fiber braided packing should ensure that it will not be damaged during transportation and storage. 8.2.1
JB/T6627-1993
The same specification of braided packing shall not exceed 5kg per roll, and the annular packing shall be packed in plastic bags and packed in boxes, tied firmly, and the weight of each box shall not exceed 20kg. 8.2.3
There should be a packing list in the package box, which should indicate: manufacturer name;
product name:
product trademark:
product specifications and models;
product quantity;
date of manufacture.
There should be a product certificate in the package box, which should indicate: a.
batch number:
standard number:
name or code of the inspector.
Transportation and storage
The braided sealing packing must be protected from rain or moisture during transportation. The product should be stored in a clean and dry warehouse. Additional remarks:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Yang Shuyi.
People's Republic of China
Mechanical Industry Standard
Carbon (chemical) fiber impregnated with polytetrafluoroethylene
Braided packing
JB/T 66271993
Published and distributed by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Format 880×1230
First edition in October 1993
Postal code 100044)
Sheet 1/2 Number of words 8,000
First edition in October 1993
Sold once for printing
Number of prints 1-500
Price 2.00 Yuan
Mechanical Industry Standard Service Network: http:/www.JB.ac.cn99
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