Smooth Cover VS Wrapped Cover of Hydraulic Hose: Which is Better

Smooth Cover VS Wrapped Cover of Hydraulic Hose: Which is Better

Smooth cover vs wrapped cover of hydraulic hose

Smooth cover vs wrapped cover of hydraulic hose, before vulcanization of rubber hose, they are generally wrapped with cloth strip or extruded plastic which results in different cover.

Industrial veterans, when choosing hydraulics hoses, consider several factors. One of these factors is the cover of the hose to use. Hydraulic hose covers come in two main types: smooth and wrapped covers.

The major difference between both covers is the different hose curing methods used by manufacturers during production. They serve similar purposes, such as protecting the hose from cracking. However, the application determines the best hose cover to be used. Next, we discuss in detail the differences between a smooth cover hydraulic hose and a wrapped hydraulic hose.

Smooth Cover VS Wrapped Cover
Smooth Cover VS Wrapped Cover

What are the differences between Wrapped and  Smooth Hydraulic Hose Cover?

Determining FactorsWrapped CoversSmooth Covers
Abrasion resistance: It is the ability to withstand mechanical stress in the presence of pressure. Abrasion resistance, however, is a property of the cover material.Based on abrasion resistance, the wrapped cover has no telling impact.Its abrasion performance is better than the wrapped cover curing method.
Protection from ozone degradation: Ozone is common among most electrical equipment, lighting, and welding materials. It reacts to cause cracking when these materials gain ozone exposure. So, it is necessary to reinforce hose covers adequately.Surface changes in wrapped covers render it less efficient. Therefore it gives room for cracks from ozone exposure.Alternatively, smooth hose covers are more resistant to Ozone induced cracking. It has no changes in surface shape changes that permit cracks.
Installation ease: The circumferential ridges around a hydraulic hose should be free. That way, it allows easy cover installation.Using a wrapped cover increases the chances of congestion around the routing paths of the hose. Hence, it is more difficult to route.On the other hand, a smooth cover hose is a better option when routing via a complex pattern.
Cover material Compatibility: The cover material largely influences the curing method used.This curing method is compatible with an extended range of extruded plastic cover materials. So it is vital in such applications.Otherwise, smooth hose covers are best for most applications.
Allowance of larger diameters: This feature allows better hose fitting of different sizes.It fits hoses of larger diameters.It is not suitable for wider-diameter applications.
Ease of production: This factor determines the time required to produce a hose cover.It takes less time and therefore is suitable for production runs on a tight schedule.Production is less simple and therefore takes more production time.

Manufacturing Process of the Smooth-cover Hydraulic Hose

The smooth hose cover has a plastic-coated sheath around the hydraulic hose. In the vulcanizing process, this plastic cover is used to apply pressure on the hose cover, leaving no evident vestiges.

This curing technique results in the smooth surface texture we find in smooth hydraulic hoses. The plastic-coated material also ensures that the hydraulic hose has good abrasion resistance.

Manufacturing Process of the Wrapped-cover Hydraulic Hose

Fabrication of Wrapped Cover Hydraulic Hose

The spiral-wrapped hydraulics hose cover is made up of nylon fabric strips. During vulcanizing, this material is used to wrap the circumferential ridges of the hose. A nylon water press is an extrusion for this hose cover. Extra applied pressure allows the hydraulic hose surface texture to develop spiral grains.

Afterward, the water press is removed to allow the circumferential ridges and spiral textile weaves to press onto the hydraulic hose cover. Hence, they overlap the nylon strips. As a result, the created wrapped hydraulic hose cover offers fewer abrasion capabilities.

Why do hoses have a ‘wrapped’ or ‘smooth’ cover appearance?

The differences between the wrapped and smooth hose covers result from their curing processes. There are many production procedures companies use for vulcanizing hose covers. Their choices, however, largely depend on the most effective and durable options for the hose they are producing.

Factors such as the hose diameter, cover materials, and other finishing touches are considered when selecting the best cover.

Other Reasons for The Different Cover Types

Another reason for the variance in hose cover appearance is the materials used. For wrapped covers, it comprises nylon fabrics. Before the curing process, these nylon fabric strips are used to wrap the hose. In the process, companies use a significant degree of pressure to make the material compact. Afterward, they detach the nylon strips. These removed nylon strips leave an imprint around the hose surface. Therefore, they form circumferential ridges and textile weaves.

On the other hand, smooth covers use a plastic sheath instead. The plastic sheath induces the necessary pressure for the vulcanizing process. Unlike the wrapped covers, it does not leave imprints or circular marks. As a result, it is often the most used and efficient hose manufacturing method.

Our Verdict

There is no concrete statistic to indicate that one cover type is better than the other.  It all depends on the available cover materials and the applications of the said hydraulic hose. The function, form, crimp specs, and fitting do not matter if the fabrication processes and materials are the same.

However, the wrapped cover curing method edges out the smooth cover from a personal perspective as it is more convenient for short-term purposes. The smooth cover works better for long-term uses.

For all your hydraulic hose needs, contact us today at Stongflex Hose and Fittings. Our experts are here to answer any questions you may have. 

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