Chemical hose is widely used in chemical and oil industry to transfer chemicals, solvents, acid, alkali and other corrosive fluids. There are various of materials for chemical hoselike PVC, PE, PTFE, NBR, EPDM and others. Then what are the differences among them? Let’s talk about it.
As one of the most popular materials in the world, PVC is used in almost all of the industries and replace of rubber hoses in some applications. As chemical hose, it can resist the corrosion of most of the acid, alkali and salt. But it can’t resist the corrosion from aromatic hydrocarbon, ketone, ether and hydrocarbon. The chemical hose can bear the temperature of 55℃ for long time and shortly at 60℃.
CPVC is a kind of white or lemon particle or powder without odour and toxic. After chloridizing, molecular bond of PVC increases irregularly then cause the solubleness and chemical stability increase. Then improve the heat, acid, alkali and salt resistance. It has similar chemical corrosion resistance with PVC but it can work at 95℃ for long term and shortly at 110℃.
PP (polypropylene) has excellent chemical corrosion resistance. It also resists normal acid except 2 kinds of acid compound. It’s stable to polarity solutions like alcohol and hydroxy acid which will not make it swelling. But it could be dissolved and swelled by part of non-polar organic solvents. It can work at 90℃ for long term and shortly at 110℃.
The chemical property of PE is similar to PP but it’s not smooth than PP on the surface. It can resist lots of solvents and the acid and alkali corrosion but it can’t resist oxidizing acid like nitric acid. PE will oxidizes in oxidizing acid environment. PE chemical hose works at 100℃ and shortly up to 120℃.
PVDF is mainly in petrochemical industry, electronics and fluorocarbon coating because of its excellent chemical resistance, chemical stability, processing property and creep property. But it will corrode by nitric acid, strong alkali amine and ketone. PVDF chemical hose works at 140℃ and reach to 150℃ shortly.
Today we lean 5 materials for chemical hose, each of which has advantages and disadvantages. Everflex is a professional supplier of hoses with 15 years’ experience. If you need hose or have some questions, welcome to contact us.