News

　　The magnetic test is a method to distinguish between austenitic stainless steel and ferritic stainless steel. The oil- resistant rubber heat shrinkable tube is a non-magnetic steel, but it is slightly magnetic when it is cold-worked under atmospheric pressure; both pure chromium steel and low-alloy steel are ferromagnetic steel, The oil-resistant rubber heat-shrinkable tube test is a simple method to quickly distinguish between ordinary carbon steel and all types of stainless steel. The concentration of copper sulfate solution used is 5-10%. Then, let's learn about the application fields and product introduction of oil-resistant rubber heat-shrinkable tubes!　　

　　1. What is the application field of oil-resistant rubber heat shrinkable tubing?

　　Oil-resistant rubber joints Conditions of use Industries: chemical, petrochemical, oil refining, chlor-alkali, acid making. Phosphate fertilizers, pharmaceuticals, pesticides, fibers, dyeing, coking, gas, synthesis, non-ferrous smelting, iron and steel, atomic energy and polymer filter materials, production of high-purity products (such as ion membrane electrolysis), require the transportation and operation of viscous materials, Highly hygienic food, beverage and other processing and production sectors.

　　2. Introduction of oil-resistant rubber heat shrinkable tube:

　　The oil-resistant rubber heat-shrinkable tube group is the outer EPDM rubber tube body, and the tube is laminated with polytetrafluoroethylene and tube connecting flanges. The oil-resistant rubber heat-shrinkable tube is a polymer compound polymerized by tetrafluoroethylene, which has excellent chemical stability. , Corrosion resistance, it is one of the materials with excellent corrosion resistance in the world at present, molten alkali metal, chlorine trifluoride, chlorine pentafluoride, boiling with water will not change, it is widely used in various kinds of materials that need resistance to acids, alkalis and solvents Occasions, sealing, high lubricating viscosity, electrical insulation and good ability, excellent temperature resistance.

　　3. Pressure test of oil-resistant rubber heat shrinkable tube:

　　1. Before the fixed-point test, the test area should remove grease or various impurities, polish the small area with a soft polishing cloth, and then instill copper sulfate solution in the clean area of ​​the drip bottle, ordinary carbon steel and iron will form in a few seconds The metal copper layer on the surface, while the surface of stainless steel will not produce copper precipitation, nor will it show the color of copper.

　　2. After finely grinding the edge of the sample, wash it with nitric acid (specific gravity 1.42 ) with a volume concentration of 20-30% and a temperature of 60-66 for 30 minutes to passivate it. The sulfuric acid test solution has a volume concentration of 10%. When it is heated to 71.302 and 304 steels are immersed in the hot solution, a large number of bubbles will be generated due to rapid corrosion, and the sample will turn black within a few minutes.

　　4. The oil-resistant rubber heat-shrinkable tube can work at a temperature of 250-180 for a long time, and it is non-toxic to humans.

　　Oil-resistant rubber heat-shrinkable tube products contain volatile substances, which can shorten the service life whether in a humid environment or in a dry environment. Therefore, after general rubber products are used, put them in a plastic bag and do not expose them to the air for a long time. It is also an effective way to prolong the life of rubber products, and oil-resistant rubber joint products are generally installed on pipelines. After the initial pressure of the rubber joint during operation and maintenance, or when it is effective again after a long-term shutdown or when using energy-storing rubber joints, please avoid high temperature, ozone oil, In the acid-base environment, the outdoor or sunny pipelines should be shaded, and overeating, rain, and turbidity are strictly prohibited. It is strictly forbidden to paint or wrap insulation materials on the surface of the joints. Rubber products have aging problems and must be checked and replaced in time.

　　The oil-resistant rubber heat-shrinkable tube is made of ordinary NBR, and must not work for a long time in 125-degree sour gasoline. Acid-resistant gasoline gets better. Increasing the content of acrylic fiber can reduce the permeability of sour gasoline. Nitrile rubber is prepared by emulsion polymerization of butadiene and propylene. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has high oil resistance, high abrasion resistance, and Good thermal performance and strong adhesive force. The higher the propylene content, the better the oil resistance. Nitrile rubber is mainly used for the preparation of oil-resistant rubber products. It also has water resistance, air tightness, and excellent bonding performance, but has the disadvantage of high cost. The oil-resistant rubber heat shrinkable tube has excellent comprehensive properties. .

　　The above is the application field and product introduction of oil-resistant rubber heat shrinkable tubing . If you need to know more, please feel free to contact us!