Rubber hose is the tube for gas transportation, commonly used in gas welding, gas cutting, all kinds of gas shielded welding, plasma arc welding and cutting. There are two kinds of rubber hose for welding, according to the national standard blue pipe for oxygen pipe, the maximum use pressure is 1.5MPa; red pipe or black pipe for acetylene pipe, the permissible use pressure is 0.5 ~ I.OMPa. Rubber hose features physiological inertia, ultraviolet light resistance, ozone resistance, resistance to high and low temperatures (-80 to 300 degrees), high transparency, high resilience, resistance to compression of the permanent non-deformation, resistance to oil, resistance to stamping, Acid and alkali resistance, abrasion resistance, flame retardant, voltage resistance, conductivity and other properties.
Basic introduction Chinese name ：Rubber hose Characteristics ：Physiological inertia, ultraviolet resistance, ozone resistance Usage ：Industry, mining and other transport and attraction of liquids and gases Hazard ：Flame retardant contains poisonous and hazardous substances Product performance, domestic development, storage and transportation conditions, quality standards, test items, inspection criteria, automotive sets, the main performance, the scope of application, the maintenance of the use of technical testing, Product performance Product properties: This product is a series of rubber hose, with resistance to compression permanent deformation, oil resistance, stamping resistance, acid and alkali, abrasion resistance, flame retardant, voltage resistance, conductivity and other properties. This product is a series of rubber hose with the characteristics of oil resistance, acid and alkali resistance, heat resistance, pressure resistance and other characteristics of the transportation and attraction of rubber hose. Usage: Mainly used in industry, mining, civil transportation and attraction of liquids and gases. Domestic development China's rubber hose industry after more than 50 years of development, the national economy has played an indispensable supporting role, especially with the improvement of China's level of mechanization and the use of new materials, rubber hose industry continues to penetrate into each other and related fields, to open up the rubber hose with the use of the set of the scope and field, the product is widely used in coal, metallurgy, cement, ports, mines, petroleum, automotive, textile, Light industry, engineering machinery, construction, marine, agriculture, aviation, aerospace and other fields. Rubber hose and belt industry adhere to the scientific concept of development, product varieties, specifications, quality has been sustained, rapid, coordinated and healthy development, basically meet the needs of the domestic market, and improve the competitiveness of products in the international market. China has become the world's rubber hose and belt production and consumption of large countries. The country has a certain scale of rubber hose tape production enterprises 812. According to the Rubber Industry Association Hose & Tape Branch statistics, the annual output of conveyor belts reached 360 million m2, V-belt production reached 2.1 billion Am, hose production reached 660 million Bm, the output of products are ranked among the world's top. 2010, China's rubber hose and belt manufacturing industry revenue reached 22.362 billion yuan, compared with the end of the "Tenth Five-Year Plan" increased by more than two times; industry realization of the industry's revenue of 22.362 billion yuan, compared with the end of the "Tenth Five-Year Plan" increased by more than two times. Growth of more than two times; industry to achieve total industrial output value of 23.092 billion yuan, an increase of 31.99%; industry profits are growing rapidly, total profits of 1.617 billion yuan in 2010, an increase of 31.83%. At the same time, "Eleventh Five-Year Plan" since China's rubber hose tape industry, professional research and development in the continuous progress, not only on the existing rubber hose tape in the rubber, technology, performance and cost improvements, so that it continues to meet the user's requirements and to adapt to the market needs, but also continue to develop new products and new technologies, to fill the gaps in the country, many domestic The performance of many domestic hose tape has been close to or reached the international advanced level, which creates conditions for domestic products to further enter the international market. According to the survey, "Twelfth Five-Year Plan" period, China's national economy will maintain sustained development, driven by coal, iron and steel, cement, ports, mines, petroleum, automotive, textile, light industry, machinery and other industries, which will bring good opportunities for the development of the rubber hose and tape industry, it is expected that in 2015, the sales scale of rubber hose and tape manufacturing industry will reach 36 billion yuan. Storage and transportation conditions In storage and transportation should be isolated from sources of ignition, avoid sharp objects and have greater corrosive chemical contact, avoid long-term storage in daylight. Quality standards Water hose standards: the implementation of the product HG/T 2184-2008 standard, vacuum brake hose, hydraulic brake hose implementation of the standard GB16897-2010. Inspection items Physical and mechanical properties: density, hardness, surface resistivity, dielectric properties, tensile properties, impact properties, tear properties, compression properties, adhesive strength, abrasion resistance, low-temperature properties, and the ability of the hose to withstand the impact of the hose, and the ability to withstand the impact of the hose, and the ability to withstand the impact of the hose. Abrasion resistance, low temperature performance, resilience, bending test Reliability test: ozone resistance, oil resistance, abrasion test, smoke test, liquid resistance test, hot air accelerated aging test Liquid resistance: lubricating oil, gasoline, oil, acid, alkali, organic solvents Dimensions: inner diameter size, length tolerance, dimensional measurements Applicable performance: hydraulic pressure resistance, impulse test, electrical conductivity, watertightness, airtightness Inspection Standard 1, hose size measurement: inner diameter, outer diameter, outer diameter of the reinforcing layer, wall thickness, concentricity, inner and outer layer of the rubber thickness, the inner diameter of the combination of parts, the new national standard and ISO increased length and measurement point marking, provides for the measurement of the length of the hose without fittings and a variety of pipe joints with a variety of hose length measurement method. 2、 Hydraulic test Verification pressure test: check whether the hose and assemblies are leaking, deformed and destroyed under the verification pressure for 30s-60s. Pressure deformation test: hold the hose under the specified pressure (working pressure, verification pressure or other pressure lower than the verification pressure) for 1 minute, measure the length and outer diameter of the hose and the change of torsion angle and bending. Burst Pressure Test: Measure the pressure at which the hose bursts under the specified rate of pressurization. Leakage test: Keep the hose under hydrostatic pressure at 70% of the minimum burst pressure for 5min and repeat once to check for leakage or damage. As the test is often water, and the actual viscosity of the liquid used is different, the burst pressure and leakage pressure measured at room temperature may be slightly lower. 3, low-temperature bending test low-temperature rigidity: the hose clamped in the diameter of 12 times the inner diameter of the hose on the torsion wheel, parked at low temperatures for 6 hours after the torque measured in 12s twisted 180 ° torque measured at standard temperatures than the torque measured. Low-temperature bending: the hose clamped on the diameter of 12 times the inner diameter of the hose on the torsion wheel, parked at low temperatures for 24 hours, within 10s twist 180 °, check whether the internal and external rubber is brittle and damage. Measurement of low-temperature brittleness of the hose is the simplest test will be the specimen at low temperatures to bend 90 °, or a section of the hose after freezing compression 1/2 to see whether the brittle crack, there is also a way to use a certain weight of the hammer free fall, the impact of the specimen to see whether the specimen is brittle crack. 4, bending test: the hose will be bent to a certain extent to measure the minimum outside diameter of the bending part and the ratio of the outside diameter before bending, the ability of the steel ball through the tube and the bending force when pressurized. 5, suction flat test: vacuum in 1min, keep 10min, with a diameter of 0.9 times the inner diameter of the hose rolled through the steel ball, check the degree of collapse of the hose. Some standards use the measurement of the hose outer diameter rate of change to indicate the degree of deformation of the hose. 6, interlayer bonding strength test: automotive hose is more than the diameter of less than 50mm braided hose, the test is commonly used 10mm wide or 25mm long test specimen, there are also 25mm wide ring, 90 ° peeling, tensile speed of 25mm/min. 7, the liquid wall penetration test: at atmospheric pressure, will be connected to the hose and a certain amount of liquid-filled containers and seal the container mouth, placed horizontally on the test device, and then periodically weigh the liquid through the hose, and the liquid through the test device. Then regularly weigh the liquid through the hose outward penetration caused by the quality of the whole test device changes, so as to find out the liquid penetration rate. 8, volumetric expansion test: the hose in the transmission of liquid pressure should not produce significant volume changes, the method of measuring volumetric expansion is to connect the hose to a hydraulic source, the other end and a measurement of the hose expansion after the volume of liquid volume connected to the tube. The pressure in the hose will be raised to the test pressure so that the hose expansion, and then close the hydraulic source, open the valve connected to the amount of pipe, the volume expansion part of the liquid rises to the amount of pipe, you can measure the volume of expansion. 9, cleanliness and extraction test: fuel hose commonly used C liquid injected into the hose, parked 24h after emptying, and C liquid to clean the inner wall. Collection of injected and flushed C liquid, the insoluble impurities filtered out, dried and weighed the weight of insoluble impurities to the unit of the inner surface area of the hose on the number of impurities or impurities in the maximum size of the cleanliness; will filter the solution evaporation, drying, weighing the weight of the soluble material. Then use methanol to extract the waxy material from the above filtrate evaporation and drying of the proceeds, the methanol extract evaporation and drying, weighing the waxy material. 10, salt spray test: the hose assembly will be placed in 35 ℃ 5% sodium chloride aqueous solution in the formation of salt spray, continued for 24h, check whether the pipe joint metal is corroded. Automobile sets with Mainly connecting engine and air filter, engine and radiator system, automobile air conditioning system. Its as part of the air intake system, closer to the engine, so it needs to be resistant to high temperature, oil, corrosion, aging, low temperature, etc., and its material according to the different types of processing technology, for example, NBR nitrile rubber is widely used in the vacuum brake hose, oil resistance is good with a high rubber content, but the ozone resistance is relatively poor; EPDM EPDM rubber is used in the automotive water hose series. Such as radiator hose, air conditioning hose. There are some higher performance materials, such as AEM acrylate high temperature resistance and so on. Each type of rubber has his characteristics, so the choice of materials in the hose is particularly important. Basically, high-grade cars use relatively good materials, some microcars, vans use poor materials, such as some microcars are still using nitrile rubber as a fuel hose, nitrile rubber are not suitable for the fuel system. Thus the alternative chlorohydrin rubber fluorine hose is more widely. The main properties of most rubber hose with non-toxic, environmentally friendly, but some of the higher requirements of the oil and gas hose, in the rubber material added flame retardant, flame retardant contains toxic and harmful substances on the human body and the atmosphere will have a slight impact. Rubber hose characteristics are also; physiological inertia, ultraviolet resistance, ozone resistance, high and low temperature resistance (-80 to 300 degrees), high transparency, resilience, compression resistance permanent non-deformation, oil resistance, stamping resistance, acid and alkali resistance, abrasion resistance, flame retardant, voltage resistance, conductivity and other properties. Scope of application supporting electrical appliances, electronics, furniture and equipment, toys, hardware, medical equipment, sporting goods, audio, lighting, machinery, automobiles, locomotives, ships, aviation, the working environment of the harsh wire coat combing water, many materials do not stick to the isolation can play a role in the field of industry. MAINTENANCE USE Rubber Hose Maintenance After Installation Proper Use of Rubber Hose It is very important to determine the length of rubber hose you need, and you should also check that the conditions of use of the rubber hose are in accordance with the requirements of the selected hose. You should make sure that the rubber hose you will be using is the most suitable. The working pressure and suction values should be carefully determined. Particular attention should be paid to the fact that sudden pressure changes or pressure peaks exceeding the permissible maximum will significantly shorten the life of the rubber hose. The ends of the rubber hose must not be continuously submerged in the conveyed material. 2. Installation of the rubber hose for use If you install the rubber hose with a bending radius smaller than the specified minimum value, the service life of the rubber hose will be greatly reduced. Therefore, before installation, it is recommended that you ask for information on use, especially on the bend radius of the rubber hose. 3. Maintenance of rubber hoses Cleaning: After use, it is recommended that you empty the hose. If necessary, it should be cleaned. Inspection: The rubber hose must be inspected after each use to ensure that no structural damage has occurred. Pressure: If the rubber hose is subjected to severe pressure during use or if the outer layer of the rubber hose will be in contact with the conveyed liquid for a long period of time, it is recommended that a hydraulic test be carried out. RUBBER HOSE STORAGE RECOMMENDATIONS Due to the natural nature of rubber, the physical properties and performance levels of all rubber products are subject to change. Such changes usually occur over time depending on the type of rubber used. However, changes may also be accelerated by several factors or a combination of several factors. Other materials used to reinforce rubber hoses may also be negatively affected by improper storage conditions. The following recommendations contain a series of precautions to minimize the deterioration of objects in storage. 1. Storage time A rotation schedule system should be used to minimize the storage time of rubber hoses. If prolonged storage cannot be avoided and the following recommendations cannot be followed, the rubber hose should be thoroughly inspected before use. 2. Physical storage conditions Rubber hoses must be stored so as to avoid mechanical stresses, including overstretching, compression or deformation, and avoid contact with sharp or pointed objects. Preferably, the rubber hose should be stored on a suitable support or on a dry floor. Rubber hoses packed in coils must be stored horizontally and should not be stacked. If stacking cannot be avoided, the stacking height should not cause permanent deformation of the rubber hose underneath. As a rule, try to avoid wrapping rubber hose around posts or hooks. If rubber hose is shipped straight, it is recommended that it be stored horizontally without bending. 3. Contact with other materials Rubber hose must not come into contact with solvents, fuels, oils, greases, unstable chemicals, acids, disinfectants, or organic liquids in general. Also, damage to rubber of any kind can occur when it comes into contact with certain materials or mixtures, including manganese, iron, copper, and their alloys. Rubber hose should be protected from contact with polyvinyl chloride (PVC) or wood or cloth impregnated with creosote. 4. Temperature and humidity Recommended storage temperature: 10° C to 25° C. Note: Do not store the rubber hose in temperatures above 40°C or below 0°C. Particular care should be taken when moving the hose below -15 degrees Celsius. Rubber tubing must not be stored in a file attached to a heat source where the relative humidity does not exceed 65%. 5. Exposure to heat sources The temperature limits described in point 4 must be observed. If this is not possible, the rubber tubing should be protected from heat sources by thermal insulation. 6. Exposure to light Storage rooms for rubber tubing should be kept dark, especially to avoid direct sunlight or strong artificial light on the rubber tubing. If the storage room has windows or any openings covered by glass, they should be covered. 7. Exposure to oxygen and ozone Rubber tubing should be properly packaged or stored in airtight containers to avoid exposure to air. Equipment that is prone to emit ozone, which has a particularly strong effect on all rubber products, should not be placed in the storage room. 8. Exposure to electric or magnetic fields Storage rooms should avoid any situation that may generate electric or magnetic fields, including exposure to high-voltage cables or high-frequency generators. Technical testing 1, material identification: rubber type material material testing laboratory, provide import and export related certificates, report analysis cost analysis degree.2, product modification: the new ability to improve the product, such as high temperature resistance, oxidation resistance, elongation.
3, industrial diagnosis: for the detection of product treatment problems such as vulcanization time, spitting white.
4, formula testing: analysis of formulas, customized illustrations, to provide technical guidance.