This standard applies to the hoses connected between the shut-off valves and combustion appliances of household gas, liquefied petroleum gas and natural gas pressure reducing devices. HG 2486-1993 Household Gas Hose HG2486-1993 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG 2486 —93
Household Gas Hose
Published on July 5, 1993
Ministry of Chemical Industry of the People's Republic of China
Implemented on December 1, 1994
Chemical Industry Standard of the People's Republic of China
Household Gas Hose
1 Subject Content and Scope of Application
This standard specifies the technical requirements, test methods and inspection rules for household gas hoses, etc. 2486—93
This standard applies to the hoses connected between the shut-off valves and the combustion appliances of the pressure reducing devices for household gas, petroleum gas and natural gas. Reference standards
GB/T1690 Test method for liquid resistance of vulcanized rubber GB/T5564 Test method for low-temperature bending of rubber GB/T5565 Test method for bending of rubber hoses
GB/T9576 Guide for selection, storage, use and maintenance of rubber and plastic hoses and hose assemblies GB/T9577 Marking, packaging and transportation rules for rubber and plastic hoses and hose assemblies 3 Product structure, materials, dimensions and product marking 3.1 Hose Structure
Single layer: its color is black, and the surface is smooth: double layer: the hose with double layer structure of inner rubber layer and outer rubber layer has the outer rubber layer withered yellow color and has groove pattern parallel to the axis;, b.
Three layers: the hose with three layers of structure of inner rubber layer, middle rubber layer and outer rubber layer has the outer rubber layer with orange color and has groove pattern parallel to the axis.
3.2 The material of the hose is rubber or thermoplastic material. 3.3 The size and tolerance of the hose shall comply with the provisions of Table 1. Table 1
Nominal inner diameter
Tolerance,
Note: Special specifications shall be resolved through negotiation between the supplier and the supplier. ThicknessbZxz.net
Thickness of adhesive layer
Cemetery, soil
3.4 ​​The length of the hose can be proposed by the user and determined with the consent of the manufacturer. The length tolerance is ±1% of the total length of the hose. 3.5 Product marking
Marking content: name, specification, standard number, approved by the Ministry of Chemical Industry of the People's Republic of China on July 5, 1993 and implemented on December 1, 1994
Marking example: Gas hose
4 Technical requirements
4.1 Appearance
HG 2486 93
Diameter 09mm30m
HG 2486
Standard code
-Product specifications
-Product name
The wall thickness of the hose should be uniform, without bubbles, impurities, cracks, sponge-like and other defects that affect use. 4.2 Hose use environment temperature
Resin tube: -10～70℃, rubber tube: -10～90℃ 4.3 Air tightness
When the hose is tested for air tightness at a pressure of 0.1MPa, there should be no air leakage for 1min. 4.4 Pressure performance
When the hose is tested for pressure resistance at a pressure of 0.2MPa, there should be no leakage or rupture for 1min. 4.5 Bending performance
When the hose is tested at 5 times the nominal inner diameter as the minimum bending radius, there should be no collapse. 4.6 Warm bending performance
When the hose is tested at 10 times the nominal inner diameter as the minimum bending radius under other conditions, there should be no cracking. Wait until the sample is restored to ambient temperature (not less than 3h) for air tightness test, there should be no leakage. 4.7 Liquid resistance
The sample of the inner and outer rubber layers (or rubber material) of the pipe is slowly immersed in 120# gasoline at 23°C. After 24 h, the weight change of the sample shall not exceed ±10%.
4.8 Gas permeation test
Use a 900mm long hose as a sample, and let gas containing more than 98% of nitrite pass through it. Apply a pressure of 55.99kPa to the sample. After ventilation for 24 hours, measure the amount of gas (mL/h) that passes through the sample within 6 hours. It should meet the requirements of Table 2. Table 2
Nominal inner diameter mm
4.9 Flame retardancy test
Gas inflow mL/h
5 or less
7 or less
Put the hose in a flame of 800℃ for 5s and remove the flame. The continuous burning time of the hose shall not exceed 5s. 5 Test method
5.1 Appearance inspection
Use a vernier caliper with an accuracy of 0.05m and self-test. 5. 2 Air tightness test of hose
Plug one end of the hose to make it free, connect the other end to the air pump or air source, and immerse the sample in water. Gradually inflate the tube to the specified pressure, maintain for 1m, and check whether the hose has any leaks. The length of the sample is 1m. 5.3 Pressure resistance test
HG 2486 — 93
Plug one end of the vertically placed soft camp sample with a plug with an exhaust valve to make it free, and connect the other end to the outlet pipe of the hydraulic pump. Inject low-pressure water into the tube body to exhaust the air, close the exhaust valve and pressurize it to the specified pressure at a pressure increase rate of 0.075~～0.175MPa／(0.75~1.75bar／s), maintain for 1m, and check whether the hose has any leaks or damage. The length of the sample is 1m. 5.4 Hose bending test
Perform according to GB/T5565
5.5 Hose low temperature bending test
Perform according to GB/T5564.
5.6 Hose liquid resistance test
Perform according to GB/T1690,
5.7 Hose gas permeability test
Perform according to Appendix A.
5.8 Hose flame retardancy test
Perform according to Appendix B.
6 Inspection rules
6.1 The hose shall be inspected and accepted in batches by the quality inspection department of the manufacturer. The quantity of each batch shall not exceed 100,000m. Each batch of products must be accompanied by a quality certificate before leaving the factory.
6.2 The appearance and size of the hose shall be checked one by one.6.3 In each batch of hoses, select one specification as a representative and test the air tightness and pressure resistance of any one hose at least once a month. 6.4 For less than one batch, the test is conducted once a month. 6.5 The bending test, low temperature bending performance test and liquid resistance performance test of the hose are conducted once a year. 6.6 The gas permeation test and flame retardancy test of the hose are conducted in the following situations: a. New product trial production; b. When there are major changes in the process and raw materials used; c. When the product is discontinued for one year and then resumed, 67 If there are unqualified items, double samples should be taken from the same batch of products for retesting the unqualified items. If there is still one unqualified item after the retest, the batch of products is unqualified. 7 Marking, packaging, transportation and storage
Perform according to GB/T9576 and GB/T9577.
A1 Question content and scope of application
HG 2486 — 93
Gas permeation test method
(Supplement)
This appendix specifies the sputtering method for the gas permeability test of household gas hoses. This appendix is ​​applicable to the detection of gas permeability of household gas hoses. A2 Test device
Adjust the water bottle to 35 ± 0.2 ℃. It is better to place the gas cylinder (tandem flask) and the pipe in a constant temperature water tank, or place the gas cylinder and the pipe in a constant temperature room at 35 ± 0.5 ℃. The test device is shown in Figure A1.8
① A flat bottom flask: an aspirator; @ A water column dynamometer: ① A tandem gas cylinder: @ 5- mercury pressure gauge @ Φ a valve: @ a dropper: @ a flat bottom flask; 010 a stopper; @ a sample; ? A pressure gauge: @ - pressure Regulator; three-way valve; constant temperature water tap A3 test method
Use a 900mm hose as the sample, plug one end with a plug, and connect the other end to the glass tube passing through the bottle stopper in the flat bottom flask① (Figure A1). Under an air pressure of about 196kPa (2kgr/cm\), check whether the connection part and the bottle stopper are leaking in the water, remove the moisture on the surface of the sample and other parts as much as possible, and then plug the bottle stopper and the sample back into the flask① (see Figure A1). At this time, be careful not to break the sample. Fill the aspirator② with 20% salt water, pre-fill the water column pressure gauge② with gas-saturated distilled water, adjust the constant temperature water to 35±0.2°C, and after at least 25 days, use a vacuum pump to extract the air in the sample, and then supply gas (propane) from the gas cylinder④ to keep the pressure inside the sample at 55.99Pa (450mmHg column), when the valve ③ is closed, the level of the water column pressure gauge @ changes due to the permeation of gas. Open the valve to let the saline in the aspirator ③ flow into the measuring cylinder @. In this way, the water level of the water column pressure gauge is equal. The volume of saline measured by the measuring cylinder ③ is equal to the volume of gas permeated from the sample. The valve ③ is left open for 22 hours after the start of the test, and then the valve is closed for 6 hours between 24 and 30 hours. Measure the gas permeation of the sample per hour (mL/h) and express it as the average value of 2 samples. B1 Scope
HG 2486-93
Flammability test method
(Supplement)
This appendix specifies the determination method of flame retardancy test for gas hose. B2 Test capacity
The test apparatus is shown in Figure B1.
①-Sample; Guangdong-Bunsen burner: @-gas B 3 Test method
Use a Bunsen burner with an inner diameter of 10mm and a flame length of about 40mm to allow liquefied petroleum gas (gas) to burn completely. From the tip of the reducing flame, about 10mm (about 800) as shown in Figure B1, use a hose about 25cm long as the sample, roughly placed in a horizontal position. After 5, remove the flame and measure the sustained burning time of the sample. It is expressed as the average value of 3 samples. 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 National Technical Committee for Standardization of Rubber and Rubber Products, Cavity Hose Sub-Technical Committee. This standard was drafted by Tianjin Rubber Products Factory No. 6. The main drafters of this standard were Li Tao and Wang Baozhu. This standard refers to and adopts Japanese Industrial Standard JIS K6348-1980 "Rubber Hose for Gas" Chinese People's Republic of China
Chemical Industry Standard
Chemical Industry Standard
Chemical Industry Standard
H 2486 -- 93
Editorial Department of Chemical Industry Standards
(Institute of Standardization, Ministry of Chemical Industry)
Postal Code: 100013
i.e., Institute of Standardization, Ministry of Chemical Industry
Royalty not included
Format 880×1230.1/.16 Printing Sheet. Academic Number 10000 First Edition November 1993: First Printing November 1993 Printing Quantity 1 —500
Cost 1.60 Yuan
2486 -- 93
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