Service performance of teflon hose.

It can be said that Teflon is a very stable polymer material, which can't chemically react with 99% of chemicals, so it can be described as the little prince of high temperature in chemistry. Teflon is hardly corroded by any chemical agent except molten alkali metal. For example, when boiled in concentrated sulfuric acid, nitric acid, hydrochloric acid or even aqua regia, its weight and performance have no change. It is almost insoluble in solvents and only slightly soluble in all alkanes (about 0.1g/100g) above 300℃.

Common chemical corrosion products that teflon can resist:

Acidic corrosion products: sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, acetic acid (content > 80%), etc.

Alkaline corrosion products: sodium hydroxide, calcium hydrosulfide, sodium sulfide, hydrazine hydrate (containing hydrazine ≤64%), sodium ethoxide, diethanolamine, dicyclohexylamine, etc.

Other corrosive products: methanol, chromium fluoride, dichloroacetaldehyde, chloroform, sodium phenolate, etc.

Teflon has so many advantages, but its disadvantages are high hardness and difficult molding. Therefore, when this material is made into a hose product, it inevitably faces some problems: thick-walled pipes are easy to be produced and molded, but the flexibility decreases and the bending radius is large; Deep valley corrugation can compensate for the stiffness caused by thick wall, but it may produce dead angle for cleaning.

TEFLON HOSE (PTFE corrugated hose, PTFE bellows, Teflon bellows, Teflon hose), abbreviated as PTFE in English, PTFE (F4,PTFE) has a series of excellent service performance: high temperature resistance-long-term service temperature of 200 ~ 260℃.

Teflon is an engineering plastic material with high temperature resistance (280℃), high electricity resistance (45KV/mm), strong acid and alkali resistance, adhesion resistance, slipperiness and wear resistance, and is widely used in machinery, automobiles, electronics, chemicals, valves and other parts. Teflon hose is widely used in chemical, instrument, electric heating and mechanical industries. Among them, insulation sleeve is widely used in aerospace, automobile, medical treatment, electronic transformer, communication and other scientific and technological industries because of its high temperature resistance and voltage resistance (300V).

Stainless steel mesh sleeve is the main pressure-bearing part of PTFE pipe installed in pressure pipeline, and it also plays a protective role for PTFE pipe. According to the pressure in the pipeline and the application place, one or more layers of stainless steel wire or steel belt can be selected, which is woven according to certain parameters to form a high-pressure resistant PTFE hose. Stainless steel mesh covers mainly include steel wire mesh covers and steel belt mesh covers.