Selection and application of inner wall materials of flexible rubber hoses tubes

In industrial production and daily life, flexible rubber hoses tubes play an indispensable role as an important fluid transmission tool. They are widely used in many fields such as petroleum, chemical industry, food processing, machinery manufacturing, automobile manufacturing, aerospace, etc., for conveying various liquids, gases and some solid particles. 

EPDM (ethylene propylene diene monomer rubber): a versatile weathering expert
EPDM, the full name of which is ethylene-propylene-diene monomer rubber, is a synthetic rubber known for its excellent weather resistance, ozone resistance and wide chemical stability. It can resist the erosion of most acids, alkalis, alcohols and some oils and fats, so it performs well in the transportation of a variety of chemicals. EPDM hoses are particularly suitable for outdoor environments, such as agricultural irrigation, urban water supply systems, and occasions that require long-term exposure to ultraviolet rays. Their good elastic recovery and anti-aging properties ensure the long life of the hose. In addition, EPDM materials also have certain high temperature resistance, which makes it also applicable in some specific high-temperature fluid transmission.

NBR (nitrile rubber): the guardian of oil media
NBR, or nitrile rubber, is a synthetic rubber copolymerized by butadiene and acrylonitrile. Its most notable feature is its extremely high oil resistance and wear resistance, which makes NBR hoses the first choice for oil medium transmission such as petroleum, fuel oil, and lubricating oil. In the automotive industry, machinery manufacturing, and chemical industry, NBR hoses are widely used because of their good sealing and anti-aging capabilities. It is worth noting that although NBR has good resistance to most hydrocarbon solvents, it is more sensitive to strong oxidants such as nitric acid and concentrated sulfuric acid, so the specific application environment needs to be considered when choosing.

Silicone rubber: a stable choice for high temperature environments
Silicone rubber hoses are known for their excellent high temperature resistance and can maintain stable physical and chemical properties over a wide temperature range of -60°C to +250°C. This material is not only resistant to high temperatures, but also has good insulation, oxidation resistance and radiation resistance, making it an ideal choice for the transmission of high-temperature steam, hot oil, hot water and certain special chemicals. In industries such as food processing, medical equipment and semiconductor manufacturing, silicone rubber hoses are favored because of their non-toxic, odorless and FDA-compliant properties.

PVC (polyvinyl chloride): an economical and practical room temperature solution
PVC, polyvinyl chloride, is a widely used thermoplastic that has a place in the manufacture of flexible hoses due to its low cost and easy processing. Although the temperature resistance range of PVC hoses is relatively narrow (-15°C to +60°C), in many room temperature or low temperature fluid transmission occasions, such as household water supply and drainage, air conditioning systems, agricultural irrigation, etc., PVC hoses are popular for their economical, easy installation and maintenance. However, PVC is less resistant to certain chemicals, such as chlorine, ketones, and ester solvents, so it should be used with caution in certain chemical environments.