This standard specifies the model, technical requirements, test methods and inspection rules of polytetrafluoroethylene braided packing. This standard applies to PTFE fibers, PTFE split filaments, expanded PTFE tapes, and expanded PTFE graphite tape braided fillers. JB/T 6626-1993 PTFE braided packing JB/T6626-1993 Standard download and decompression password: www.bzxz.net

J22
JB
Machine Industry Standard of the People's Republic of China
JB/T 6626-93
PTFE braided packing
1993-05-07 Published
Ministry of Machinery Industry of the People's Republic of China
Published
Implemented on 1994-01-01
Machinery Industry Standard of the People's Republic of China
PTFE braiding Packing
Subject content and scope of application
JB/T6626-93
This standard specifies the model, technical requirements, test methods and inspection rules of polytetrazoethylene braided packing. This standard applies to polytetramine fiber, polytetraoxyethylene split filament, expanded polytetrafluoroethylene tape, and expanded polytetrafluoroethylene graphite tape braided filler.
Quoted standards
2
GB2828
Batch-by-batch inspection and counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Carbonized fiber braided filler test method||tt ||JB/T6371
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Model number
The model number of PTFE braided filler consists of uppercase Chinese Pinyin letters and Arabic numerals, and is expressed as follows: SF
Maximum operating temperature
The type of woven material, represented by Chinese pinyin letters (see Table 1) The basic code of polytetraoxyethylene
Table 1
Material
Material| |tt||dimensional
crack
silk
model example:
generationbZxz.net
w
GS

Material
Material
Expanded tetrachlorethylene tape
Expanded polyoxyethylene graphite tape
Expanded PTFE graphite tape Braided filler, maximum operating temperature 250C: SFPS/250 technical requirements
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4.1
The square cutting surface specifications and dimensional deviation of polytetrafluoroethylene braided filler should comply with the provisions of Table 2. Table 2
Specifications
Deviation
3. 0
4.0
±0.2
5.0
6.0||tt ||8.0
± 0. 3
10.0
12.014.0
±0. 5
Physical and mechanical properties of polytetrazoethylene braided filler Should comply with the requirements of Table 3. 4. 2
16.0
18.0
±0.7
generation
20.0
P
Ps||tt| |22.7
No.
mm
24.025.0
=1. 0
4.3 The surface of the polytetrafluoroethylene braided packing should be smooth and without cracks When applying PTFE emulsion or other lubricants, they should be evenly distributed and should not fall off. There should be no more than one exposed thread, jumper, missing flower, or edge within 10m. Approved by the Ministry of Machinery Industry on 1993-05-07
Implemented on 1994-01-01
1
Property
Energy
Bulk Density
Temperature resistance loss (260C)
Barrier coefficient
Wear amount
Compression rate
Rebound rate
5 test methods
Single
bit
g/cm
%
8
%
%
JB/T 6626—93
Table 3
SFW/260
>1. 70
0.1+
0.3
10~30
≥40
SFGS/260
>1. 50
a
0.14
≤0.3
15~30||tt| |40
SFP/260
≥1. 00
3
≤0.14
≤0.4
25~40||tt ||10
SFPS/250
>1. 00
≤15
0.12
0. 03
15~30| | tt | times, take the arithmetic mean of 3 locations as the test result. 5.2 The bulk density, compression rate, rebound rate, temperature resistance loss, friction coefficient and wear amount of polytetrafluoroethylene braided filler are tested in accordance with the regulations of JB/T6371.
5.3 The appearance quality of polytetraoxyethylene braided filler shall be visually inspected. 6 Inspection Rules
6.1
Polytetraoxyethylene braided packing must be inspected by the inspection department before it can leave the factory. 6.2 Product inspection is divided into factory inspection and type inspection. The items for factory inspection include: specifications and dimensional deviation, volume density, temperature loss, and appearance quality. The items for type inspection are all items specified in Articles 4.1 to 4.3. Type inspection shall be carried out when one of the following circumstances occurs: 6.3
Test new products:
b.
c.
d.
e.
Product Transformation;
After formal production, there will be major improvements in structure, materials, and processes, which may affect product performance; normal production will last for 1 year;
will be discontinued for more than 3 months and restart production.
The appearance quality of polytetrafluoroethylene braided packing should be fully inspected, and other items should be sampled for inspection. 6.4
6.5 Products of the same brand and specifications are divided into one batch of 50kg, and products less than 50kg are counted as one batch. During sampling, a sample of sufficient testing quantity is taken from the unit product as a representative of the unit product. 6.6 Articles 4.1 and 4.2 of polytetrafluoroethylene braided packing shall be implemented according to the one-time sampling plan specified in GB2828. Inspection level 1, qualified quality level AQL is 10, and full inspection is adopted in Article 4.3. 7 Marking, Packaging, Storage
7.1 Mark
The packaging box of polytetraethylene woven filler should be marked: a.
b.
c||tt ||d.
e.
Manufacturer name and trademark;
Product name:
Product model and specification;
Gross weight and net weight:|| tt||Manufacturing date or production batch number.
7.2 Packaging
The packaging of polytetrazoethylene braided filler should ensure that it is not damaged during storage and transportation. 7. 2.1
7. 2. 2
2
Polytetraoxyethylene braided filler, packed in plastic bags and put into boxes, the bundling rate is solid, and the weight of each box does not exceed 20kg. 7. 2. 3
a
b.
c.
d.
e.
f.||tt| |7. 2. 4
a.
b.
c.
7.3
The packing list should be attached with the following notes: Note: Product name:
Product trademark:
Manufacturer name:
Product model and specifications;
Product quantity:
Manufacturing date. | |tt |
Transportation and Storage
7.3.1
7. 3. 2
Polytetraethylene braided packing must be protected from rain or moisture during transportation. The product should be stored in a clean and dry warehouse. It is strictly prohibited to bake, expose to the sun, get damp or wet. The storage period should not exceed 3 years from the date of production.
Additional notes:
This standard was proposed and centralized by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Yang Shuyi.
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