HG/T 3647-1999 Cold-resistant conveyor belt HG/T3647-1999 standard download decompression password: www.bzxz.net

Record number: 4066-1999
HG/T3647-1999
The main requirements of this standard are basically the same as GB/T7984-1987 "Ordinary purpose fabric core conveyor belts". The cover layer has added cold resistance performance requirements (tensile cold resistance coefficient), and the cold resistance performance adopts the former Soviet national standard FOCT20-1985 "Technical conditions for fabric core conveyor belts". This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Ministry of Chemical Industry's tape standardization technology unit. The drafting units of this standard: Fuxin Rubber Co., Ltd., Shanghai Xinmin Rubber Factory. The main drafters of this standard: Jin Guiju, Sha Xuemei, Tao Zhengguan, Li Guiyun, Zhang Chunlei. 448
1 Scope
Chemical Industry Standard of the People's Republic of China
Cold resistant conveyor belt
Cold resistant conveyor beltHG/T 3647--1999
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of cold resistant conveyor belts (hereinafter referred to as "cold resistant belts" or "belts").
This standard applies to cold resistant conveyor belts with fabric cores at ambient temperatures of -60℃ to +50℃. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T528--1992 Determination of tensile properties of vulcanized rubber and thermoplastic rubber GB/T2941-1991 Standard temperature, humidity and time for environmental conditioning and testing of rubber specimens (eqvISO471:1983eqvISO 1826:1981)
GB/T3512--1983 (1989) Rubber hot air aging test method (negISO188:1976) GB/T3690--1994 Determination of tensile strength and elongation of fabric core conveyor belts (eqvISO283:1990) GB/T 4490-1994
GB/T 5752--1992
GB/T 6035--1985
GB/T 67591986
Conveyor belt dimensions (eqvISO251:1987ISO583:1990)Conveyor belt marking (neqISO433:1991)Determination of tensile cold resistance coefficient of vulcanized rubber
Determination method of interlayer adhesion strength of conveyor beltsTest method for grooving of conveyor belts
GB/T 7983-1987
GB/T 7984—1987
General purpose fabric core conveyor belts
GB/T 9867-1988
Determination of wear resistance of vulcanized rubber (rotating roller simple abrasion machine method) (negISO4649:1985)HG/T2194--1991 Provisions for joints of canvas core conveyor beltsHG/T 2410--1992
HG/T 3046--1989
HG/T 3056—1986
3 Classification
3.1 Structure
Conveyor belt sampling
Appearance quality regulations for fabric core conveyor belts
General rules for storage and handling of conveyor belts (eqvISO5285:1978) The core of the cold-resistant belt is made of one or more layers of canvas, and the core is covered with cold-resistant covering glue and edge glue. 3.2 Specifications
The specifications of cold-resistant belts are divided according to their longitudinal full-thickness tensile strength, width and covering layer performance. 3.2.1 The longitudinal full-thickness tensile strength specification series of cold-resistant belts shall comply with the provisions of GB/T7984. 3.2.2 The width specification series of cold-resistant belts shall comply with the provisions of GB/T4490. Approved by the National Petroleum and Chemical Industry Fan on August 12, 1999 and implemented on October 1, 2000
HG/T 3647—1999
3. 2.3 Cold-resistant belts are divided into three types according to the performance of the covering layer: scratch-resistant type (H), wear-resistant type (D) and general type (L), and divided into two levels according to the cold-resistant performance: C and C2.
3.3 Product marking
Add CI or C after the performance type of the covering layer to indicate the cold-resistant performance level of the belt. Marking example;
4.1 Appearance quality of the belt
The appearance quality of the belt shall comply with the provisions of HG/T3046. 4.2 Dimensional deviation
4.5 X 1.5
Thickness of upper and lower covering layer
Number of core layers
Material code of core fabric
Nominal width
Performance code of covering layer
Longitudinal full thickness tensile strength
The length, width, total thickness and thickness deviation of covering layer shall comply with the provisions of GB/T4490. 4.3 The number and position of longitudinal and transverse joints of fabric layer The number and position of longitudinal and transverse joints of fabric layer shall comply with the provisions of HG/T2194. 4.4 Physical properties
4.4.1 Physical properties of covering layer
The physical properties of covering layer shall comply with the provisions of Table 1. Table 1
Tensile strength/MPa
Elongation at break/%
Aging test (70℃, 7 d)
Change rate of tensile strength/%
Change rate of elongation at break/%
Abrasion loss/mmm2
Tensile resistance coefficient
Not less than
Not less than
Not less thanbZxz.net
Not greater than
C(—45℃)
C2(- 50℃)
Note: C—the ambient temperature for use is -45℃～+50℃, Cz—the ambient temperature for use is -60℃～+50℃. 4.4.2Thickness tensile strength and elongation
The thickness tensile strength and elongation of the belt shall comply with the requirements of GB/T7984. 4.4.3 Interlayer bonding strength
The interlayer bonding strength of the belt shall comply with the provisions of GB/T7984. 450
4.5 Straightness
HG/T 3647--1999
The straightness of the belt shall comply with the provisions of GB/T7984. 4.6 Grooving
The groove forming property of the belt shall comply with the provisions of GB/T 7984. 5 Test methods
5.1 Measurement of belt dimensions
Performed in accordance with GB/T4490.
5.2 Covering layer tensile property test
Performed in accordance with GB/T528.
Note: The specimen size is cut by a dumbbell-shaped cutter of type 2 (narrow parallel part width 4.0mm±0.1mm). 5.3 Covering layer wear resistance test
Performed in accordance with GB/T9867.
5.4 Test of aging resistance of covering layer
Perform according to GB/T3512.
5.5 Determination of tensile cold resistance coefficient of covering layer
Perform according to GB/T6035, in which the sample preparation and test temperature selection shall be carried out in accordance with the following provisions. 5.5.1 Sample preparation
5.5.1.1 After the strip is made for 16 hours, cut 3 samples at a normal position not less than 100mm away from the edge of the strip. The sample size is 100mm long and 20mm wide.
5.5.1.2 Peel off the covering layer of the sample and grind it on a grinding wheel to a thickness of (2.00±0.30)mm. Cut the sample with a type 2 cutter in GB/T528 standard, and cut off equal lengths at both ends of the type 2 sample to make the remaining length 42mm. 5.5.1.3 The cutting direction of the sample should be consistent with the calendering and extrusion direction. 5.5.2 Test temperature
According to the cold resistance level of the belt, the test temperature is selected as -45℃ and -50℃ respectively. 5.6 The full thickness tensile strength and elongation test of the belt shall be carried out in accordance with GB/T3690.
Note: For conveyor belts with synthetic fiber filament fabric as the belt core, it is recommended to use type B specimens, and for conveyor belts with natural fiber fabric as the belt core, it is recommended to use type C specimens.
5.7 Interlayer bonding strength test
According to method A in GB/T6759-1986. 5.8 Straightness measurement of belt
According to GB/T7984.
5.9 Grooving test of belt
According to GB/T7983.
6 Inspection rules
6.1 Inspect the appearance quality and specification size of each belt. 6.2 Take a certain number of samples from a production batch for factory inspection. The sampling quantity and requirements shall be in accordance with HG/T2410. 6.3 During factory inspection, full thickness tensile strength and elongation, physical properties of the covering layer (except tensile cold resistance coefficient and hot air aging test), and interlayer bonding strength test shall be carried out.
6.4 Type inspection shall be carried out every six months, and all technical requirements specified in this standard shall be inspected. 6.5 In the physical property inspection, if a certain property does not meet the standard, double samples shall be taken from the same batch of tapes for retesting of the property. If there is still one test result that does not meet the standard after the retest, the batch of products shall be judged as unqualified products. 7 Marking, packaging, storage and handling
7.1 The marking of the tape shall be carried out in accordance with GB/T5752.
7.2 The tape shall be wound around the mandrel and tied firmly with a covering. The product name, mark, tape length, production serial number and manufacturer name (or registered trademark) shall be marked on the packaging.
7.3 The product should be accompanied by a quality inspection certificate before leaving the factory. 7.4 The storage and transportation of the belt shall comply with HG/T3056. 452
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