JB/T 7758.2-1995 Technical conditions for flexible graphite sheets JB/T7758.2-1995 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7758.2-95
Flexible Graphite Sheet
Published on June 16, 1995
Technical Conditions
Implemented on July 1, 1996
Ministry of Machinery Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Flexible Graphite Sheet
Subject Content and Scope of Application
Technical Conditions
This standard specifies the technical requirements, test methods and inspection rules for flexible graphite sheets. This standard applies to flexible graphite sheets and also to flexible graphite tapes. 2 Reference Standards
GB2828
JB/T6622
JB/T6623
JB/T6625
ZB J22 009
ZBJ22010
ZBJ22012
ZBJ22013
ZBJ22015
3 Technical requirements
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Determination method of chlorine content in flexible graphite sheets
Determination method of sulfur content in flexible graphite sheets
Stress relaxation test method for flexible graphite sheets Method
Flexible graphite sheet
Flexible graphite sheet
Flexible graphite sheet
Flexible graphite sheet
Flexible graphite sheet
Density test method
Tensile strength test method
Compression rate, rebound rate test method
Ash content determination method
Thermal weight loss determination method
The specifications and deviations of flexible graphite sheet shall comply with the provisions of Table 1. Table 1
Molded sheet
Molded sheet
Note: ①H is the thickness of the sheet.
②, the specifications required by the user are not subject to this limit. ±5
The physical, chemical and mechanical properties of flexible graphite sheet shall comply with the provisions of Table 2. 3.2
The surface of flexible graphite sheet shall be smooth, without obvious defects such as bubbles, cracks, wrinkles, scratches, impurities, etc. 3.3
Density deviation g/em
Tensile strength MPa
Compression rate %
Approved by the Ministry of Machinery Industry on 1995-06-16
JB/T 7758.2-95
Thickness deviation
Implemented on 1996-07-01
Rebound rate %
Stress relaxation rate %
Ash content %
Heat loss %
Oscillation content Ppm
Chlorine content ppm
Note: Density 1.0~1.1g/em.
4 Test method
JB/T 7758.295
Continued Table 2
600℃
4.1 The length and width of the flexible graphite plate are measured with a ruler with an accuracy of 1mm. 4.2 The thickness of the flexible graphite plate is measured with a micrometer with an accuracy of 0.01mm. Index
≤1500
The specimen for thickness measurement is a square with a side length of 50mm. Each group of specimens shall not be less than 5. For each specimen, three points are measured at equal distances along its diagonal line with an accuracy of 0.01mm, and the arithmetic mean is taken. The measurement result is expressed as the arithmetic mean of a group of specimens, taking two significant figures. 4.3 The test methods for density, tensile strength, compression rate, rebound rate, stress relaxation, ash content, thermal weight loss, sulfur content and chlorine content of flexible graphite sheets shall comply with the provisions of ZBJ22009, ZBJ22010, ZBJ22012, JB/T6625, ZBJ22013, ZBJ22015, JB/T6623 and JB/T6622 respectively.
4.4 The surface quality of flexible stone sheets shall be visually inspected. 5 Inspection rules
5.1 Flexible graphite sheets shall be inspected by the inspection department before leaving the factory. 5.2 Product inspection is divided into factory inspection and type inspection. The items of factory inspection include: density deviation, tensile strength, compression rate, rebound rate, ash content and the items specified in Articles 3.1 and 3.3. The items of type inspection are all the items specified in Articles 3.1 to 3.3. 5.3 Type inspection should be carried out in any of the following situations: a. Trial production of new products; product transformation: After formal production, there are major improvements in structure, materials and processes, which may affect product performance: d. There is a quarter of gap in normal production. 5.4 The sampling method of flexible graphite sheets is to randomly select 5.5 molded sheets in the warehouse as "box" units, and press sheets as "roll" units. 50 boxes (rolls) are a batch. When sampling, take out enough samples for testing from the unit product as the representative of the unit product. 5.6 The sampling procedure and judgment rules of flexible graphite sheets shall be implemented in accordance with GB2828. 3.13.2 adopts normal inspection, inspection level 1, and the qualified quality level AQL value is 103.3 adopts full inspection. Marking, packaging, transportation and storagebzxZ.net
6.1 Marking
The packaging box of flexible graphite sheet should indicate: a. Product name:
b. Manufacturer name;
Product model or mark:
Gross weight, net weight:
Manufacturing date or production batch number.
6.2 Packaging
JB/T7758.2—95
The packaging of flexible graphite sheet should ensure that it will not be damaged or lost during storage and transportation. The packaging box should be accompanied by a packing list, which should indicate: Product name:
Product trademark:
Manufacturers name:
Product specifications, models:
Product quantity:
Manufacturing date.
The packaging box should be accompanied by a product certificate, which should indicate: Batch number:
Standard number:
Inspector's name or code.
6.3 Transportation and storage
Flexible graphite sheets must be protected from rain and moisture during transportation. Flexible graphite sheets should be stored in a clean, dry warehouse. Additional notes:
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 authors of this standard are Zhang Weiren and Liu Dongyi. 3
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