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Chemical Industry Standard of the People's Republic of China
HG/T2698-95
Rubber sheet for equipment anti-corrosion lining
Published on 1995-05-05
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1996-01-01
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Rubber sheet for equipment anti-corrosion lining
1 Subject content and scope of application
HG/T2698-95
Replaces GB/T5575-85
This standard specifies the classification, specifications and dimensions, technical requirements, test methods, acceptance rules, and marking, packaging, transportation and storage of several rubber lining rubber sheets (hereinafter referred to as lining rubber sheets) used for equipment anti-corrosion. This standard applies to rubber sheets for equipment anti-corrosion lining. Cited standards
GB/T528 Determination of tensile properties of vulcanized rubber and thermoplastic rubberGB/T531
Test method for Shore A hardness of vulcanized rubber
Test method for liquid resistance of vulcanized rubber
GB/T1690
GB/T 1696
GB/T1697
GB/T1699
GB/T1701
GB/T2411
Test method for transverse breaking strength of hard rubberTest method for impact strength of hard rubber
Test method for heat resistance of hard rubber
Test method for tensile strength and elongation at break of hard rubberTest method for Shore A hardness of plastics
GB/T7760||t t||Determination of adhesion between vulcanized rubber and metal Single plate method GB/T11211 Determination of adhesion strength between vulcanized rubber and metal Tensile method HG/T2451
3 Classification
Equipment anti-corrosion rubber lining
Lined rubber sheets can be divided into the following according to the vulcanization method:
3.1 Heated vulcanized rubber sheet (R)
The rubber lining made by sticking the unvulcanized rubber sheet lining on the equipment and vulcanizing it with steam (high-pressure steam, normal-pressure steam) or hot water.
The vulcanized rubber sheet can be divided into hard rubber (RY), semi-hard rubber (RBY) and soft rubber (RR) according to its hardness. 3.2 Naturally vulcanized rubber sheet (Z)
The unvulcanized rubber sheet is pasted on the equipment with adhesive, and the anti-corrosion lining is formed after the vulcanization process is completed after it is parked for a certain period of time at room temperature.
3.3 Pre-vulcanized rubber sheet (Y)
The rubber sheet is vulcanized in advance and then pasted on the equipment with adhesive to form an anti-corrosion lining. 4 Specifications and dimensions
The specifications and dimensions of the lining rubber sheet shall comply with the provisions of Table 1. The standard was approved by the Ministry of Chemical Industry of the People's Republic of China on May 5, 1995 (mm),
Implementation on January 1, 1996
Nominal size
IG/T2698-95
Nominal size
Note: The nominal width of the lining rubber sheet is allowed to increase or decrease according to the requirements of the ordering party. 5 Technical requirements
The physical and mechanical properties of the vulcanized rubber of the lining rubber sheet shall comply with the provisions of Table 2. 5.1bZxz.net
Heat-cured rubber sheet R
Performance items
Shore A, degrees
Shore D, degrees
Tensile strength MPa
Tear elongation, %
Tear permanent deformation, %
Transverse breaking strength, MPa
Impact strength, J/m
Semi-hard rubber
200×10
Naturally vulcanized rubber sheet
Pre-vulcanized rubber sheet
5.2According to the requirements of the orderer, the Martin heat resistance index can be added. 5.3The liquid resistance of the vulcanized rubber of the lining rubber sheet should be evaluated according to the actual use of the test temperature and the following test conditions, and the test conditions and performance index levels can also be selected according to actual needs. Medium conditions:
HCI:1)20%HCI×10d
2)30%HCI×10d
Standard H,SO,:1)40%H,O,×10d
2)60%H,SO,×10d
H,PO:75%H,PO,×10d
NaOH:40%NaOH×10 d
Performance index:
See Table 3,
Weight change rate, %
HG/T2698-95
>10~15 or -5~<-3
>15~20 or -10~<-5
5.4 The lining rubber sheet should be dense, evenly hooked, with a clean surface and neat edges. Under the condition of passing the electric spark test, the allowable range of defects of the rubber sheet is as specified in Table 4.
Defect name
Surface impurities
Spots or uneven
Within 1m, the depth does not exceed the allowable deviation of the rubber sheet thickness, and the area does not exceed 5 bubbles of 2mm; the area does not exceed 3 bubbles of 5mm
Within 1m, the depth and length of impurities do not exceed the allowable deviation of the rubber sheet thickness. Slight marks that do not exceed the allowable deviation of the original length of the rubber sheet are allowed. There should be no cracks in the 90 degree bending inspection. The depth and height do not exceed the allowable deviation of the rubber sheet thickness. 5.5 Lining rubber sheets should be able to withstand the voltage required for electric spark pinhole inspection. 6 Product marking
6.1 Marking method
Product name, model, standard number.
6.2 Marking example
Lined rubber sheet
RYHG/TXXXX
Standard number
Hard rubber heated vulcanized lined rubber sheet
Product name
7 Inspection method
7.1 The thickness of the lining rubber sheet shall be measured with a thickness gauge within 50mm from the edge of the rubber sheet (the reading shall be accurate to 0.1mm); the width and length shall be measured with a box ruler (the reading shall be accurate to 1mm), the width The measurement is taken at 3 points from the end, and the distance between each point is not less than 1m. The measurement results are taken as the arithmetic average.
7.2 The surface quality of the lining rubber plate is inspected by visual inspection and measuring tools. 7.3 The hardness of the lining rubber plate is inspected according to the methods specified in GB/T531 and GB/T2411 respectively. 7.4 The tensile strength, elongation at break and permanent deformation at break of the lining rubber plate are carried out according to the provisions of GB/T528; the hard rubber plate is carried out according to the provisions of GB/T1701.
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7.5 The transverse breaking strength test of the hard rubber plate is carried out according to the provisions of GB/T1696. 7.6 The impact strength test of the hard rubber plate is carried out according to the provisions of GB/T1697. 7.7 The Martin heat resistance test of the hard rubber plate is carried out according to the provisions of GB/T1699. 7.8-Liquid resistance test of lining rubber sheet shall be carried out in accordance with the provisions of GB/T1690, 7.9 Electric spark pinhole test of lining rubber sheet shall be carried out in accordance with the provisions of HG/T2451 8 Inspection rules
&.1 Factory inspection
The specifications, dimensions and surface quality of lining rubber sheet shall be fully inspected; and the same type of lining rubber sheet not exceeding 10t shall be regarded as a batch, and the half-monthly output shall be regarded as a batch if it is less than 10t. The performance items specified in Table 2 and Article 5.2 of this standard shall be inspected item by item.
8.2 Type inspection
According to the relevant provisions of Article 6.6.1 of GB/T1.3, type inspection shall be carried out for all technical requirements listed in this standard according to different types of lining rubber sheets. Under normal circumstances, liquid resistance test shall be inspected once every quarter, and other items shall be inspected once every six months. 83 Judgment rules
If the specifications, dimensions or surface quality do not conform to the requirements of this standard, they shall be judged as unqualified products. For other properties, sufficient samples shall be randomly selected from each batch for testing. If one indicator does not meet the requirements, double samples shall be taken for retesting. If it still does not meet the requirements, the batch of products shall be unqualified. 9.1 Lining rubber sheets are rolled on the mandrel with plastic film or padding as the isolation layer and suspended in the packaging box. 9.2 Each packaging box should be accompanied by a product certificate and indicate the product mark, specification, quantity, trademark, manufacturer name, production date, inspector code, etc. The packaging box should be marked with a "Do not place upside down" sign. 9.3 Lining rubber sheets should be kept clean and avoid direct sunlight during transportation and storage. They should not come into contact with organic solvents such as gasoline and kerosene, as well as harmful substances such as acids and alkalis.
9.4 The temperature of naturally vulcanized lining rubber sheets should be kept below 10°C during transportation and storage, and the temperature of other lining rubber sheets should be kept at -20~～30°C. They should not be placed under pressure and should be 2m away from heat sources. 9.5 In compliance with 9.3 and 9.Under the conditions specified in Article 4, the effective shelf life of pre-vulcanized lining rubber sheets is 24 months from the date of production, and that of other lining rubber sheets is 6 months.
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Appendix A
Bonding of lining rubber sheets to metal
(Supplement)
A1 Lining rubber sheets shall meet the bonding strength specified in Table A1 to ensure good bonding with metal. Table A1
Heat-vulcanized rubber sheets
Bonding strength of rubber sheets to metal (tear-off), MPa
Bonding strength of rubber sheets to metal (90° peeling), kN/m>
Semi-hard rubber
Natural vulcanization
Pre-vulcanized
A2 Test of bonding strength of rubber sheets to metal (tensile method), according to GB/T1121 1 Carry out: 90° peel strength test, according to the provisions of GB/T7760
Appendix B
Classification of heated vulcanized rubber lining
(reference)
B1 Vulcanized slow-vulcanized rubber lining
The equipment is lined with rubber and placed in a vulcanizing tank. Steam is introduced and the vulcanization is carried out under certain temperature, pressure and time conditions to make the rubber lining. B2 Body vulcanized rubber lining
The unvulcanized rubber sheet lining is attached to the equipment, and steam is directly introduced into the equipment. The rubber lining is vulcanized under certain temperature, pressure and time conditions to make the rubber lining.
B3 Normal pressure steam vulcanized rubber lining
The unvulcanized rubber sheet lining is attached to the equipment. On the equipment, normal pressure steam is passed into the equipment, and the stable rubber lining is made after a certain period of vulcanization. Hot water vulcanized rubber lining
The unvulcanized rubber sheet lining is attached to the equipment, water is introduced into the equipment, and then the water is heated and vulcanized for a certain period of time to make a grid rubber lining,
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Appendix C
Liquid resistance application range of lining rubber sheet
(reference)
Liquid resistance application range of lining single rubber sheet is shown in Table C1Table C1
Maximum concentration of allowed medium, % (weight)
Medium name|| tt||Hydrogennitric acid
Sodium hydroxide
Potassium hydroxide
Neutral saline solution
Additional instructions:
Maximum allowable temperature
65 to 85
Heating vulcanized rubber sheet R
Semi-hard rubber
Any concentration
Below 60
Below 40
Any concentration
Below 50
Any concentration
Any concentration
Any concentration
Any concentration
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of Beijing Rubber Products Design and Research Institute. Natural vulcanization
Below 10
Below 50
Pre-vulcanization
Any concentration
Below 70
Below 50
Any concentration
This standard was drafted by Beijing Rubber Product Design Institute with funding, Shenyang Rubber Industrial Products Research Institute, Wuhan Hongqiao Rubber Factory and Tianjin Rubber Product Factory No. 1.
The main drafters of this standard are Liu Bing, Zhao Jihu, Han Deren, Xu Wenzhi and Zhang Meihong. From the date of implementation of this standard, the original National Standard of the People's Republic of China GB/T5575-85 "Unvulcanized Rubber Plate for Lining of Chemical Equipment" shall be invalid.
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Chemical industry standards
Rubber sheet for equipment anti-corrosion lining
HG/T2698-95
Editor Chemical Industry Standards Editing and Publishing Group
(Standardization Research Institute of Ministry of Chemical Industry)
Postal code: 100011
Printing Standardization Research Institute of Ministry of Chemical Industry
Copyright reserved and no reproduction
Number of words on a sheet 12000
Format 880×12301/16
First printing in December 1995
First edition in December 1995
Number of prints 1-500
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