This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of flame retardant V-belts. This standard applies to flame retardant ordinary V-belts and flame retardant narrow V-belts. GB 12731-2003 Flame retardant V-belts GB12731-2003 Standard download decompression password: www.bzxz.net

Table 1 in 2.4.1 of this standard is for temperature regulation, and the rest are for recommendation. CB12731-2003
This standard is not equivalent to the national standard B537:19 Annular V-belt Actuation and Annular V-belt Transmission Specification 3. Technical Standard H379, but the requirements of narrow belt type 15.2 are added in Table 1, and the inspection regulations, packaging, transportation and storage are added.
This standard replaces (H1273:
199 push V belt 3 and 13/1-3714-15F9 belt stove heating range and after-sales teaching 3. Note!: G-27:1-1SS1 ± compared to the following changes in the product mark, FR\ indicates "forget the flammable mark", "AS\ indicates "static cup mark" instead of the original standard "S\ indicates "neutral mark" (! Car version 3.!: 3.3 of this version): In addition to the product appearance quality, physical The physical performance and reference force regulations are unified according to 4/T117 (T/T1373) 1951 version 1.2, 4.3, 3. This version 1.2, 1.3, 5.1) states except for the original standard V-belt material half-degree step 1.2 protection model regulations, equivalent to the use of 7:15 square (! The car version of
is equivalent to the British month 37:195 regulations. The original standard adopted by the test material is alcohol and the compound of type A. The standard is certified by GBT1C7-4198. The relevant internal wear limit of this standard is included in the standard of this standard. This standard is issued by the national chemical industry test method. The standard is issued by the national chemical industry test method. The standard is responsible for the year: Woshi County, Henan Province. Qingdao Rubber Industry Standard Research Institute. The main people of this standard are: Zhang Jun, Gu Huomu, Xue Qijun, Xin Qiulu, and the total number of times this standard is issued is: --G3-271- 190
GH/1*37141589
1 Scope
GH12731—2003
This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of flame retardant V-belts: hereinafter referred to as V-belts.
This standard specifies the transportation of flame retardant V-belts and flame retardant V-belts. 2 Normative referencesbzxz.net
The following documents and clauses become clauses of this standard through reference to the relevant standards. For any referenced documents, all subsequent amendments (excluding other contents) or revisions shall not be included in this standard. However, the parties who have reached an agreement on this standard shall study whether the new versions of these documents can be used. For any referenced documents that are not included in this standard, all subsequent amendments (excluding other contents) or revisions shall not be included in this standard. For the referenced documents with different dates, the latest edition shall apply to this standard. GB/T394: Industrial alcohol
/T11?--Ordinary V-belts
6 V-belt industry strength and elongation test method
GWM T07I5 Transmission fast belt group V-belt and single V-belt including finger V rear angle: Electrical properties of belts: Test method ((5/127_-2210813:1998M0)B/11544 and belt dimensions G/1144397cg10184GH/T1773-General standard V belt
3 Structure, classification and marking
3.1 Structural type
The structure of V-belts is divided into edge-type belts and cut-type V-belts. The structural diagram of V-belts is shown in the figure! As shown, 1
Wrap:
Cold cavity:
Core lake:
And Taiwan rubber:
General rubber,
National 1 edge-wrapped V-belt
3.2 Specification series
The specification series of V-belts shall comply with the provisions of GB:I1_544. 3.3 Marking
The standard of the general road belt is shown in the table of small methods for measurement 1: 1
GB12731—2003
Example 1: FR
14ceGB12751
Standard number
Anti-static mark
Stamp mark
Anti-static narrow V-belt marking as shown in Example 2
Example 2: AS
4 Requirements
4.1 Size
3005-2731
Standard No.
Effective length (m)
Anti-electrical mark
V-belt length and group plateau structure conform to the provisions of GBT11544. 4.2 Appearance quality
4.2.: The appearance quality of ordinary V-step (H/T1171). 4.2. 2 Narrow V section appearance quality bottom conformity GI3/T12730 4.3 Physical properties
4.3. The physical properties of ordinary VF shall comply with the provisions of CB/T111. 4.3.2 The physical properties of VF shall comply with the provisions of CH/T12730. 4.4 Safety performance
4.4.1 Combustion performance
The flammability performance of the material shall comply with the provisions of Table 1
Back pass
HPR, 15N
The average extinguishing time of each column ||tt ||Yuan. Explosion and combustion
Unit is second
Each extinguishing time
No post increase in burning
4.4.2 Antistatic performance
The resistance is calculated according to the formula:
Where:
—Yang specified value, unit is Yao only)
One test is the total contact length between the two contact winds, the year is (: the total contact length with pet force, unit is mean (mrr). 5 test method
5. 1. The size of the belt is measured according to GB/T:15. 5.2 The appearance of the V belt is tested with a tape measure and the test results are as follows. GB12731-2003 5.3 The tensile strength of the V belt is tested according to GB/T1171, and the strength of the V belt is tested according to GB/T1171. 5.1 The ignition resistance of the V belt is tested according to GB/T10715. 6. Inspection rules for V belts. 1. V belts are tested by: Quality inspection 5.2 The V belts shall be inspected for size and appearance. For batches of more than 500 meters, sufficient samples shall be taken for performance and safety performance inspection in each batch of products. Such inspection shall not be less than 6.4 If one of the non-qualified items is not qualified, the batch of products shall be doubled and the unqualified items shall be doubled. If one of the results is still less than the standard, the batch of products shall be deemed unqualified. 7.1 The V belts shall be marked with obvious marks that cannot be erased by washing, including the following contents: a) manufacturer's name and trademark; b) product name and trademark; d) year and month of manufacture; 7.2 The V belts shall be marked and packed according to the strict requirements. 7.3 During storage, avoid direct sunlight, keep clean, and avoid contact with acid, organic solvents and other substances that may affect the quality of the product. Prevent damage from heat sources other than 1. 7.4 For storage, the temperature in the storage room should be kept between 13% and 4%, and the relative humidity should be kept between 50 and 80°C. During storage, avoid excessive use. 7.5 In the case of complying with 7.3 and 7.4 of this standard, the manufacturer shall ensure that the product meets the requirements of the wood standard within one year of storage, and the wood quality shall be guaranteed to meet the requirements of the wood standard GB12731-2000. 3
A.1 Principle
Appendix A
(Normative Appendix)
Flame retardancy test method
Only one flame of variable temperature burns the V-belt sample for a certain time, then remove the lamp and measure the time of the automatic concentration of flameless combustion on the selected part.
A.2 The test equipment includes the following parts:
The flame is burnt with a flame, as shown in A.1. The fuel source is located about 7m from the bottom of the wine box, and the flame height of the blowtorch is a)
1rm.
The clamp and its bracket are used to install the sample according to the requirements: The flame is tested, as shown in Figure A.2. It contains a wine blowtorch clamp, and the test is carried out in the box. The phenomenon of dense burning is seen on the whip, and the light or straight inside is soft and relatively stable. It is advisable to use a small amount of C.29, and the previous amount of Fu 339 is a stopwatch. A.3 Fuel
The fuel is in accordance with the provisions of 3/3u4.1. The volume content of the alcohol at 20℃ is 5%. A,4 The test sample
is a section taken from the same strip, and each section is greater than the required cutting agent, and the surface is straight, and the station is kept clean, dry, smooth, and unequal. A.5 Procedure
A,5.1 Alcohol blowtorch ignition operation
A, 5.1.1 When the alcohol blowtorch is preheating the fuel, close the control valve of the burner and open the valve of the agent container: A, 12. After confirming that the fuel consumption in the alcohol container is (that is, there is no temperature leakage), heat the fuel in the heat disk, expand the control limit of the burner, and ignite the red spray. The height of the broken section precision storage device is until the full fire height reaches 153. A.5.2 Determination of the burning and self-melting time of the sample A.5.2.1 Clamp the sample on the clamp in the combustion test box, and the V-belt or sample cut end face is half of the pin. The V-belt sample must be clamped in the middle and the height of the clamp is adjusted so that the sample is 30mm above the lamp opening (as shown in A.1). A.5.2.2 Place the blowtorch test rod just below the sample. At the same time, quickly open the light and close the door of the burning test age:
A.5.2.3 Record the time from the removal of the flame to the time when the sample no longer has any visible increase in flame or no flame, that is, the self-ignition time. A.6 Table of results
The mean and maximum values ​​of the self-extinguishing time of each sample, A.? Test report
The test report shall include the following:
Test type of V-belt;
Test temperature and relative humidity;
Test equipment;
Test duration:
Test aging;
Test points: one effective rotation indicator;
Figure A.1 Arrangement of flame retardancy test
GB12731—2003
GB12731—2003
Sliding door!
Observer can be, 45u transparent tempered glass:
Master workmanship:
Select 4i
5.-Draw ao
With G=n tree as bracket (if slightly jade):
7—Quality assurance, low sales and fire payment period: 5m, thick cabinet) design, in addition, the light-tolerance back is 2%, Figure A.2 Combustion test box
is the position of the key
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