HG/T 2193-1991 Rubber hoses and hose assemblies for washing machines and dishwashing containers HG/T2193-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Rubber hoses and hose assemblies for washing (clothes) machines and dishwashing containers
HG 2193-91
This standard is equivalent to the international standard 150/1IS6801-1988 "Rubber hoses and hose assemblies for washing (clothes) machines and dishwashing containers".
Subject content and scope of application
This standard specifies the technical requirements for flexible reinforced rubber hoses and hose assemblies for washing (clothes) machines and dishwashing containers. This standard is applicable to rubber hoses for conveying domestic water with a pressure not exceeding JMPa and a temperature not exceeding 90C. This standard does not include technical requirements for soft arm joints, but only specifies the test method for mechanical strength. 2 Reference standards Standard temperature, astringency and time for environmental conditioning and testing of rubber specimens GB/T 2941: GB3512 Test method for hot air aging of rubber GB5563 GB9571 Hydraulic test method for hoses Evaluation of oxygen resistance of rubber and plastic hoses under static conditions Rubber. Inner diameter size and length tolerance of plastic hoses GB 9575 Rubber. Guide for selection, storage, use and maintenance of plastic hoses and hose assemblies GB 9576 GB 9577 Marking, packaging and transportation rules for rubber and plastic hoses and hose assemblies 3 Model and structure 3.1 Model Type 1 is suitable for conveying water at room temperature.
Type 2 is suitable for conveying hot water with a temperature not exceeding 90°C. 3.2 Structure
The inner rubber layer is made of water-resistant rubber material: the reinforcement layer is made of natural or synthetic fabric material, and the outer rubber layer is made of ozone-resistant rubber material. 4 Specifications and Tolerances
4.1 Inner Diameter
The nominal inner diameter of the hose is 10±u.75mm ± 12.5 ± 0.75mm. 4.2 Length
The length cutting tolerance of the hose shall comply with the provisions of GB9575. Approved by the Ministry of Chemical Industry of the People's Republic of China on December 23, 1991 and implemented on May 1, 1992
5 Technical requirements
5. 1 Twisting resistance
HG 2193:91
At the standard temperature specified in G/T2941, fold the sample of the hose assembly into 180° and then pressurize it so that the total thickness of the sample after pressurization is equivalent to twice the outer diameter of the hose, as shown in Figure 1. After keeping it under this pressure for 5 seconds, stretch the sample to a straight state and place it for 1 minute. After the sample is folded 10 times in the same position and in the same direction according to the above process, the sample should meet the requirements of 5.2. Folding time
Figure 1 Twisting resistance test
5.2 Static pressure performance after aging
Fill the sample with hot water as specified: 70°C for type 1 and 90°C for type 2. Then place the sample in an aging box at a specified temperature for 168 hours. After aging, the sample is filled with water at a certain temperature: 70±2℃ for type 1 and 90±2℃ for type 2. Then, according to the method specified in GB5563, it is kept at a pressure of 3.15MPa for 1 minute. The sample shall not have defects such as leakage and rupture. The convex joint shall not be loose.
5. 3 Good oxygen resistance performance
The sample is tested for 96 hours at an ozone concentration of 50pphm and a temperature of 30±2℃ according to the provisions of GB9571, and then the outer rubber layer is observed with a 7x effective mirror. No cracks shall be found. Customer standard industry data free download HG219391
5.4 Pulse resistance performance
Fill the hose assembly sample with water at a certain temperature: 25±2℃ for type 1 and 90±2℃ for type 2. Then install it on the equipment shown in Figure 2 and perform 25,000 sinusoidal wave pulse tests. The maximum value of the pulse pressure is 2MPa, and the minimum value is 1MPa. The loss in the pulse chamber should be maintained within the water temperature specified by the sample. The sample is installed in a ring shape. The diameter of the ring is about 300mI, and the pulse frequency is 0.5+9Hz, as shown in Figure 3. The sample after the test shall not be broken, leaked, or have pooling, and the pipe joints shall not be loose. Figure 2 Pulse test device
1-pressure gauge, 2 pulse generator, 3 thermostat; 4-hose assembly installed in a ring shape: 5-fire element: 6 installation valve
Number 2 curve
Time.min
Figure 3 Gland pressure curve
5.5 Adhesion strength Www.bzxZ.net
The minimum adhesion strength between each layer of the hose shall not be less than 1.5kN/m. The test shall be carried out according to the record A. 5.6 Mechanical strength of thermoplastic pipe joint nut Place the pipe joint nut at a temperature of 23 ± 2 ° C and a relative humidity of -15% to 55% for 72 hours. Then expand the nut on the hard steel mandrel 1 as shown in Figure 4, apply a maximum torque of 15Nm, and the nut shall not break. After removing the nut, check the appearance and no cracks shall be found. And it can be used in the future.
ww.bzsosocom Free download of customer standard industry information 6 Test method 1
HG 2193-91
$314 (BSP)
Figure 4 Pipe joint nut test mandrel
6.1 Specifications and tolerances shall be checked in accordance with GB9575. 6.2 The front torsion surface performance test shall be carried out in accordance with the provisions of GB2941 and Article 5.1 of this standard. 6.3 The static pressure resistance performance test after aging shall be carried out in accordance with GB35!2 and GB5563. 6.4 The oxygen resistance test is in accordance with GB9571. 6.5 The impulse performance test is carried out in accordance with Article 5.4. 6.6 The bonding strength test is carried out in accordance with Appendix A. 6.7 The mechanical strength test of the pipe joint cap is carried out in accordance with Article 5.6. Inspection rules 2
7.1 The hose should be inspected in batches by the inspection department of the manufacturer. Each batch of hoses should not exceed 10000ml (if less than 10000m, it should be a batch per quarter). Each batch of products must be accompanied by a quality certificate when leaving the factory. 7.2 Each batch of hoses should be inspected for specifications, dimensions and appearance. 7.3 The mechanical strength of the plastic pipe joint nuts should be checked for at least 3 pieces per batch. 7.4 At least 3 samples are taken from each batch of hoses to check the torsion resistance, aging resistance and impulse performance tests. 7.5 Ozone resistance and adhesive strength tests should be sampled at least once a year. 7.6 If any of the items tested are unqualified, double samples should be taken from the batch of hoses and the unqualified items should be retested. If the unqualified items are still unqualified after the retest, the batch of products shall be unqualified.
Marking, packaging, transportation, storage 31
8.1 The hose should have the following marks that are not easy to fall off: a.
Manufacturer name or trademark;
Product name, specification, and mark code:
Manufacture year and month.
8.2 The marking, packaging, transportation, storage and use of the hose shall comply with the relevant provisions of GB9576 and GB9577. Adopting instructions:
1S)/TTS68041988 No such chapter.
2J1S0/11S68041086 No such rate. 311S0/TS68041988 No such chapter
HG2193-91
Appendix A
Determination of Adhesion Strength
(Supplement)
A1 Cut a strip specimen of 160mm×0.5 of the circumference of the hose from the hose. A2 The test should be carried out 24 hours after the hose is softened. The specimens shall be tested in accordance with the provisions of G132941. A3 Steps:
A3.1 Peel off the inner or outer rubber to a sufficient length so that the interface to be tested is a boundary surface for each individual specimen. A3.2 Take out the specimen from the parking environment and measure the actual width of the specimen. Fix the end of the specimen that has been separated and fixed on the test machine's tool and adjust it so that the stress can be evenly distributed. The specimen should not be twisted during the test. Tighten the specimen on the jig and make the stripping angle of the strip specimen about 180° and that of the ring specimen about 90°. Ensure that the stress acts on the peeling plane. A3.3 The speed of specimen peeling is 50±5 mm/min. 43.4 Start the testing machine and record the force required to separate at least 100 mm in length, in Newtons. If the specimen length is less than 100 mm, the force required to peel the maximum length should be recorded. A4 Representation of test results:
Use an automatic recorder to draw a graph showing the change in tension during interlayer peeling. Determine the median of the force from the graph, divide the median of the force by the effective width of the test mix, and calculate the bond strength (kV/n). Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China, and this standard is under the jurisdiction of the Rubber Hose Sub-Technical Committee of the National Technical Committee for Standardization of Rubber and Rubber Products. This standard was drafted by the Shenyang Rubber Industry Products Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Xu Jingwen and Wu Qingyun.
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