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Coiled Hoses

Coiled hoses are manufactured from a profiled strip that is wound in a helical pattern with the ends interlocked. Depending on the application, spiral hoses are manufactured with either seamed or interlocked profiles—ranging from highly flexible interlocked profiles to robust seamed designs.

Spiral hoses are used as flexible, temperature- and aging-resistant components in exhaust technology, as protective hoses for electrical cables and optical fibers, and as extraction and conveyance hoses.


Protective Hoses – Extremely Robust and Versatile
By selecting the appropriate material for the hose—and, if necessary, the seal and coating—a wide
range of requirements for leak tightness, corrosion resistance, and temperature resistance can be met.

Extraction and Conveying Hoses – for Solid and Gaseous Substances
The coiled metal hoses are highly flexible, lightweight, and easy to install. Applications
include the conveyance of hot and cold air, steam, exhaust gases, and smoke, as well as the transport of dust, wood and metal chips,
granules, grain, etc.

Flexible Arms – Goosenecks
High load-bearing capacity, flexibility combined with bending rigidity, robustness, and versatility are the hallmarks of the “flexible
arms” made of stainless steel and brass/spring steel. They are used, for example, as microphone and lamp holders for optoelectronic
devices and as coolant hoses on machine tools.

HYDRA Exhaust, Suction, and Blower Hoses

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Coiled Metal Hose
Notched Profile
Polygonal cross-section

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Coiled Metal Hose
Folded Profile
Polygonal cross-section

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Coiled Metal Hose
Notched Profile
Polygonal cross-section
With a wrapped coil to ...

Product Teaser List Image 749 x 674 manschette

For types FA, FG, FS, and SD

HYDRA Protective Hoses

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Protective Sleeving for Electrical Installations

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Protective hoses with high mechanical strength

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Protective Sleeves for Fiber Optics

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For all SG models

HYDRA Flexible Arms/Coolant Hoses

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Standard Series

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Coolant Hoses

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Replaceable nozzles

Next Steps

Download: FLEXPERTE Customer Version

FLEXPERTE: The design program for the Witzenmann Group’s complete product line, organized by function

  • Metal Hoses
  • Compensators
  • Metal Bags
  • Bearings, Hangers, Supports
In addition to the calculation formulas, the program also includes drawing data and complete 3D CAD drawings. Equipped with interfaces to E3D, S3D, Rohr2, and other programs, the software is versatile and universally applicable.

Additional Questions

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Questions and Answers

Coiled hoses are used as flexible, temperature- and aging-resistant components in exhaust systems, as protective sleeves for electrical cables and optical fibers, as suction and conveyance hoses, and as flexible arms.

Due to their design, coiled hoses are generally less leak-tight than corrugated hoses. Coiled hoses are manufactured from a profiled strip that is wound in a helical pattern so that the layers interlock. Depending on the profile type, this results in either an interlocked or a seamed (agraf) profile. To improve leak tightness, various sealing threads can optionally be incorporated into interlocked profiles.

The temperature resistance of coiled hoses depends primarily on the hose material used and any optional seal or jacket:

Hoses without seals:

  • Brass 2.0321 (optional: chrome-plated, nickel-plated) for temperatures up to +250°C
  • Steel 1.0226, 1.0330, or 1.0347 (hot-dip galvanized) for temperatures up to +400 °C
  • Stainless steel 1.4301 for temperatures up to +600 °C

Hoses with seals:

  • PVC sealing thread for temperatures up to +60 °C
  • Cotton twine for temperatures up to +120 °C
  • Ceramic sealing cord for temperatures up to +600 °C

Sheathed hoses:

  • PVC coating for temperatures ranging from -20°C to +80°C

Next steps

Download: FLEXPERTE customer version

FLEXPERTE: The design programme for the entire product range of the Witzenmann Group with a function-specific classification

  • Flexible metal hoses
  • Expansion joints
  • Metal bellows
  • Bearings, hangers, supports
Apart from the calculation formulas, drawing data as well as entire 3D CAD drawings are stored. With interfaces to E3D, S3D, Rohr2 and other software, the program is versatile and universally applicable.