HG/T 2300-1992 Fabric-reinforced foldable general-purpose water-transport plastic hose
Some standard content:
Chemical Industry Standard of the People's Republic of China
Fabric reinforced foldable general purpose water-transporting plastic hose HG/T2300-92
This standard is equivalent to the international standard ISO8029-1985 "Plastic hose--Specification for fabric-reinforced foldable general purpose water-transporting hose".
Subject content and scope of application
This standard specifies the model, specification, technical requirements and test methods of fabric-reinforced foldable water-transporting plastic hose. This standard applies to the above-mentioned hose used below 55°C. This standard does not apply to fire-fighting and agricultural irrigation hoses. 2 Reference standards
GB321 Priority number and priority number system
Standard temperature, humidity and time for environmental conditioning and testing of rubber specimensGB/T2941
GB5562
Physical test method for rubber layer of hose
GB5563
Hydraulic test method for hose
Low-temperature bending test method for hose
GB5564
GB5565
GB9573
GB9575||tt ||GB9576
GB9577
Hose bending test method
Methods for measuring the dimensions of rubber and plastic hoses and hose assembliesInner diameter dimensions and length tolerances of rubber and plastic hoses and hose assembliesSelection, storage, use and maintenance guide for rubber and plastic hoses and hose assembliesMarking, packaging and transportation rules for rubber and plastic hoses and hose assemblies3 Product classification, structure, materials and marking
3.1 Model
According to the working pressure of the hose, it is divided into: Type 1 and Type 2, see Table 2 for details. 3.2 Structure and materials
The water delivery plastic hose should consist of the following parts: a. b. Flexible thermoplastic plastic inner layer
b. Natural or synthetic fabric reinforcement layer suitable for bonding; Flexible thermoplastic plastic outer layer, its surface is smooth or corrugated with convex strips, c
3.3 Marking
3.3.1 Marking content
Includes the name, model, specification and standard code of the hose. Because the full name of the hose is too long, it is abbreviated as: foldable water delivery plastic pipe. 3.3.2 Example
1992-06-01 Approved by the Ministry of Chemical Industry of the People's Republic of China Standard search network m
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1993-10-01 Implementation
Foldable water-transporting plastic pipe
Technical requirements
4.1 Appearance
HG/T2300-92
HG/T2300
Standard code
Product name
The inner and outer plastic layers of the hose should be uniform in texture, and free of appearance defects such as cracks, pores and foreign impurities, or other defects that affect the performance
4.2 Dimensions and deviations||tt ||4.2.1 Inner diameter
The inner diameter and deviation of the plastic hose shall comply with the provisions of Table 1 Table 1 Nominal inner diameter and deviation
Nominal inner diameter
Note ① If the size is larger than the maximum size in Table 1 or smaller than the minimum size in Table 1, it should be selected from the R10 priority number system, and its deviation should comply with the provisions of GB9575
② If the belt adopts an intermediate size, it should be selected from the R20 priority number system, and its deviation should be in accordance with the provisions of the next adjacent larger size. 4.2.2 Length
The cutting length deviation shall comply with the provisions of GB9575. 4.3 Hydraulic performance
Plastic hoses should be able to withstand the test pressure and minimum bursting pressure specified in Table 2. 2
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working pressure
HG/T2300-92
Table 2 Test pressure and minimum bursting pressure
Test pressure
Minimum bursting pressure
Force, MPa
Working pressure
Test pressure
Under working pressure, the length change of the hose should not exceed 7%; the diameter change should not exceed 10%, minimum bursting pressure
After the hydraulic test, check that the hose should have no leakage, cracking and obvious distortion, and no damage caused by raw materials or manufacturing not meeting the requirements.
4.4, Adhesion strength
The adhesion strength between the layers of the hose should not be less than 1.5kN/m. The adhesion strength of the hose with an inner or outer layer thickness of less than 1.0mm is not required to be tested.
4.5 Bending performance
The hose should be subjected to a bending test at room temperature and 0±2°C. There should be no leakage or cracking. 4.6 Heating mass loss performance
The heating mass loss of the inner and outer layer samples of the hose should not be greater than 4%. 5 Test method 2
5.1 The dimensions and deviations of the hose shall be measured in accordance with GB9573. 5.2: The hydraulic test of the hose shall be carried out in accordance with GB5563. 5.3 The adhesion strength between the layers of the hose shall be tested in accordance with GB5562. 5.4 Hose bending test
5.4.1 Room temperature bending test
Place the hose on the standard test tube specified in GB/T2941 At quasi-laboratory temperature, park for 24 hours, and test according to GB5565. Apply internal pressure of working pressure to the hose, and bend it with a minimum bending radius of 8 times the nominal inner diameter. 5.4.2 Bending test at 0±2℃
Put the hose at 0±2℃, park according to GB5565, apply internal pressure of working pressure, and bend it with a minimum bending radius of 16 times the nominal inner diameter. Instructions:
1) ISO8029 does not have this provision
2) ISO8029 does not have this provision.
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6 Inspection rules
HG/T2300-92
6.1 Test of hose The appearance quality and specification size should be checked item by item. 6.2 The hose should be inspected and accepted in batches by the technical inspection department of the manufacturer. The quantity of each batch shall not exceed 100,000 meters, but it should be not less than once a month. The hose is tested for hydraulic pressure, adhesion strength, heating mass loss and bending performance. 6.3 In the above performance tests, if there is any failure, double samples should be taken from the batch of products for retesting the unqualified items. If one sample is still unqualified in the retest, the batch of products is unqualified. 7 Marking, packaging, transportation and storage 2
The marking, packaging, transportation and storage of hoses shall comply with the relevant provisions of GB9576 and GB9577. Instructions for use:
1) ISO8029 does not have this chapter.
2) ISO8029 does not have this chapter Provisions.
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HG/T2300-92
Appendix A
Plastics-Determination of plasticizer loss rate (activated carbon method) (supplement)
This appendix is equivalent to the international standard ISO176-1976 "Plastics-Determination of plasticizer loss-activated carbon method" in A. This appendix specifies the method for quantitatively determining the plasticizer loss rate in plastics using activated carbon at a certain time and temperature. A1 Principle
Utilizing the strong adsorption effect of activated carbon, the plastic sample is buried in the activated carbon to adsorb the plasticizer in the plastic sample, and the weight change of the sample is measured to calculate the plasticizer loss rate in the plastic. A2 Instruments and Materials
A2.1 Analytical balance: accurate to 0.001g.
A2.2 Dial indicator: accurate to 0.01mm,
A2.3 Constant temperature bath or oven: its temperature range is 50～150℃, and it can keep the test temperature fluctuation within ±1℃, A2.4 Container
Cylindrical metal can with lid. Its diameter is 100mm, height is 120mm, and there is a 3mm diameter vent on the lid. A2.5 Activated carbon
Its particle size is about 4~6mm. It should be sieved before use and dried to constant weight at 70℃. It should be stored in a dry and sealed container for use. Fresh activated carbon should be used for each test. A3 Specimen
A3.1 Cut a circular specimen with a diameter of 50±1mm and a thickness of 1±0.1mm from a plastic sheet that is free of stress and orientation, bubbles and voids.
A3.2 The number of samples should be no less than 3. Www.bzxZ.net
A4 Operation steps
A4.1 Place the samples at room temperature for 2 hours before testing. A4.2 Weigh the samples one by one, accurate to 0.001g. Use a dial indicator to measure the average thickness, accurate to 0.01mm. A4.3 Spread about 120cm2 of activated carbon on the bottom of the metal container, place a sample on the activated carbon, and cover it with 120cm2 of activated carbon. Then bury the remaining two samples in the same container in the same way, and finally, cover the container. A4.4 Place the metal container in an oven or constant temperature bath controlled at 70 ± 1°C. After 24 hours, take out the container. Cool at room temperature, take out the sample from the container, carefully brush off the small amount of activated carbon attached, and leave it at room temperature for 2 hours. A4.5 Weigh each sample to an accuracy of 0.001g. A5 Calculate the plasticizer loss rate of the sample in mass percentage: Calculate according to formula (A1). w-
m. -m,
Where: w—plasticizer loss rate of the sample after the test, %; x100.
mo——the mass of the sample at room temperature before the test, gm——the mass of the sample after the test (the sample is immersed in activated carbon at 70°C for 24 hours and then left at room temperature for 2 hours), gThe arithmetic average of the results of the three samples is taken as the plasticizer loss rate value of the plastic. A6 Test Report
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The test report includes the following contents:
HG/T2300-92
Indicate that the test is carried out according to the method specified in Appendix A of this standard; the comprehensive identification required for the sample;
The thickness of each sample, accurate to 0.01mm; the plasticizer loss rate of the sample at room temperature, expressed as a mass percentage; the test date (year, month, and);
The tester.
Additional Notes:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Rubber Hose Sub-Technical Committee of the National Rubber and Rubber Products Standardization Technical Committee. This standard was drafted by the Shenyang Rubber Industry Products Research Institute of the Ministry of Chemical Industry. The main drafter of this standard is Zhao Jingxian.
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