Flexible metal hoses: How to choose the right one for you

In this blog post, you’ll read:When it comes to choosing the proper flexible metal hose for your particular needs can seem like a daunting task. After all, there are various types and materials of hoses to consider, each of which could be better suited for one job or another.

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When it comes to choosing the proper flexible metal hose for your particular needs can seem like a daunting task. After all, there are various types and materials of hoses to consider, each of which could be better suited for one job or another.

Flexible Metal Hoses

But fear not! By doing a little research and having a few critical pieces of information, you’ll be able to choose the perfect hose that fits your application in no time. Whether you need something extra durable to handle high pressures or something lightweight and compact for tight spaces, you’ll have the best chance of making an informed decision by digging into the specifics before spending your hard-earned money. So don’t hesitate – equip yourself with knowledge and get the clear, flexible metal hose you need!

Non-metallic Flexible Hoses

Non-metallic Flexible Hoses

Non-metallic flexible hoses have revolutionized fluid systems used in numerous industries. From petrochemical to pharmaceutical and food manufacturing, these hoses are used in various applications and conform to strict industry standards. But how do they work? In short, non-metallic flexible hoses have four parts; an inner tube, reinforcement, end fittings, and a protective outer cover. Let’s break them down piece by piece.

  • Inner tubes help provide flexibility while also withstanding pressure and abrasion. This tube is usually made of rubber or synthetic plastic material such as latex nitrile or polyurethane to serve as a barrier between the hose and its environment.
  • Reinforcement lends flexible strength to protect against rupture from pressure, bursts from shock forces, noise transmissions, damage from kinking or overstretching, rodents playing with the tubing, and weathering such as UV rays.
  • End fittings provide for ease of joining multiple segments together but can also be single pieces or even just machined into the hose itself.

As for the outer layer or protective cover, this provides environmental protection against weathering, ozone oils, gas permeation other hazardous media, plus long-length durability, so you don’t need to make costly repairs every few months.

Flexible Metal Hoses

Flexible Metal Hoses

Flexible metal hoses are often used in high-pressure applications. They are composed of corrugated tubing, braid, braid collars, and end-fittings. These hoses are available in different sizes and lengths to accommodate the user’s needs.

  • Flexible metal hoses are made of thin-walled stainless steel. The thin wall helps with flexibility and movement, while the stainless steel material is durable and can withstand high pressure. The most common types of flexible metal hoses are braided and unbraided.
  • The main difference between braided and unbraided flexible metal hoses is the reinforcement. Braided hoses have a wire or textile braid around the inner tube, while unbraided hoses do not have any support.
  • Both types of hoses have their advantages and disadvantages. Braided hoses are more resistant to mechanical damage but are more challenging to install. Unbraided hoses are easier to install but are more likely to be damaged by abrasion or creasing.

When choosing a flexible metal hose, it is essential to consider the application and the type of fluid flowing through it.

Types of Metallic Flexible Hoses

There are two main types of metallic hoses: corrugated hoses and interlocked hoses. Corrugated hoses are made of layers of metal that are crimped together. Interlocked hoses have a series of metal rings that are wound together. Both types of hoses have their unique benefits and drawbacks.

Corrugated hoses

Corrugated hoses

Corrugated hoses are a handy, often overlooked item that can be invaluable in various applications. From preventing blockages to ensuring the highest degrees of precision in engineering works, one thing’s for sure – corrugated hoses should never be underestimated.

So what exactly is a corrugated hose? It consists of a bellow made of interlocked folds. This makes them incredibly flexible as they can move more easily with the pressure and motion of the piping system, which can prevent problems such as blockages or leaks. Generally speaking, this flexibility also allows for easier installation and maintenance processes – meaning less time and resources must be spent maintaining them over their lifetime.


  • This flexibility also means that corrugated hoses can accommodate different lengths and shapes and also deal with vibration applications, thermal shortening or elongation effects- perfect for when absolute precision is required in engineering works such as turbo technology or exhaust systems.
  • Their durability lends itself well to the highly corrosive environment, making them extremely versatile products – the perfect tool for any savvy professional.
  • Another key selling point of investing in a corrugated hose is their excellent resistance to high temperature and pressure – up to 180°C/356°F at 6MPa/872 psi – so you may depend on them!

Interlock Hoses

Interlock Hoses

Interlock hoses are a particular type that utilizes a unique construction method to ensure the highest possible performance. Unlike traditional hoses, interlock hoses feature close links that limit the amount of material used in the packaging process. This way, it is more economical in terms of costs and produces higher strength and durability, ensuring optimal protection for your valuable items.


  • The most noticeable difference between an interlock and a conventional hose is the incorporation of smaller links than regular hose models. This allows for increased flexibility — especially at temperature extremes and high pressures — while reducing any risk of leakage or impairment due to vigorous movement or contact with other objects during transport or storage.
  • Additionally, the construction of interlock hose designs means they’re relatively lightweight compared to traditional hoses — making them easier to transport and store while boasting top-quality performance.
  • Of course, as with any protective covering, interlock hoses still need careful cleaning after use to remain free from dirt and dust build-up before being reused again later on. Interlock hoses are also less susceptible to wear & tear, making their lifespan longer than most regular products.

Overall, interlock hoses provide significant advantages when storing and safeguarding materials from outside elements without sacrificing much money or time spent looking after them.

Installation precautions for flexible hoses

Installation precautions for flexible hoses are just as necessary as the product itself. Poorly installed and poorly maintained hoses can lead to significant problems down the road, not least of which is expensive downtime. However, by taking a few precautions during the installation process, you can ensure that your flexible hoses always perform optimally and you don’t have to worry about unnecessary costs or risks. With that in mind, let’s take a look at five critical tips for effectively installing flexible hoses:

  • Tip #1: Avoid Twisting – To keep your hose in the best condition, never twist it, as doing so will result in kinks. Ensure all bends are within the suggested bend radius while setting up the hose and ensure it is not overly complicated; otherwise, you may risk premature wear-and-tear or even a rupture!
  • Tip #2: Monitor the Measurement – To avoid any potential issues during system operation, carefully measure your flexible tubing or hose. Even if it seems secure when installed, forces such as thermal expansion and contraction can create major fitment problems later on if there needs to be more slack in the assembly.
  • Tip #3: Make the Right Choice. Flexible hoses have various configurations suitable for numerous applications, from high-temperature silicone fuel lines to braided oil line assemblies built to withstand immense temperature fluctuations or vibrations. Steel tubing can be dangerous under harsh circumstances, such as minimal yet repetitive movement cycles, making flexible hoses a much better option.
  • Tip #4: Adhere To Temperature Guidelines–Also critical is keeping operating temperatures of said hoses/tubing within their guidelines; these materials were “formulated” to handle specific temperature ranges based on chemical composition.
  • Tip #5: Don’t Forget Insulation & Clamping. Adding insulation around tubing assemblies can further contribute towards stability while handling different ambient conditions, reducing energy loss associated with such extensive tube lines.

Factors for the selection of metal hoses

Choosing the correct metal hoses for industrial uses can be a daunting task, requiring consideration of various factors. Accordingly, decision-makers must understand each element to make a well-informed selection process.

  • Material construction is one of the most fundamental aspects to consider when selecting metal hoses since the material will determine the maximum pressure handling capability and the temperature limitations.
  • The maximum operating temperature refers to the point at which a hose’s integrity could become compromised, so this aspect must be considered carefully to avoid failure. Both plastic and metal hoses are typically rated with allowable temperatures, but if more extreme conditions are expected, discuss this with your supplier before making any decision.
  • Next comes flow velocity considerations which refer not just to water but other liquids such as corrosives or combustibles. When introducing these substances into an application or system design, special attention must be taken. Hose bore size should match that of the fluid being pumped through, leaving enough allowance for turbulent flows if necessary otherwise; you could risk catastrophic failures due to cavitation or other effects which can cause localized vibrations causing premature aging etc.
  • Finally, some degree of vibration evaluation may come into play during material assessment depending upon job requirements whereby large amounts bearing tolerance will require us either look into thick-walled designs (or double braided sleeves) – complete with appropriate fatigue calculations — or conversely eliminating components prone to oscillation from our solutions via alternative layout configurations (this includes rectifying cyclical designs – however intricate).

In conclusion, various elements must be considered while selecting metal hoses; these boil down ultimately toward ultimate product longevity & efficiency, so proper research & understanding beforehand remains critical!

Wrapping up


When selecting metal hoses for industrial applications, decision-makers must consider various elements to ensure the product’s efficiency and longevity. From material construction to vibration evaluation – all considerations should be considered! By following these steps for picking the correct metal hoses that correspond with your needs, your industrial setting will remain running optimally long into the future.

With a decade of experience in the sanitary ware industry, our team at Hofen is here to guide you through every step of your flexible metal hose journey. Let us help make the best decision for you – contact us today, and let’s get started!

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