Metal Flexible hoses are flexible elements made of wire. There are two main types of metal flexible hose, which differ in design and purpose. Strip the hose and corrugated hose. Wrapped hoses have high mechanical strength (e.g. tensile strength and tensile strength). Flexible metal hoses are often better than other types of hoses when there is a risk of fire and chemicals or gases need to be controlled. Many types of metal hose are well suited for fire protection because they maintain their integrity in high temperature environments.