Flexible reinforced hoses are selected for a complete set of operating conditions, not for one parameter alone. Metal-Gum’s current product page publishes a DN25–400 range, PN6 / PN10 / PN16 and temperatures from −20 °C to +80 °C. When an installation approaches these values, operates under suction or combines several loads, every part of the hose must be verified separately.
When do installation conditions require closer analysis?
The name of the medium alone does not describe the complete installation. Pressure, temperature, suction or delivery service, movement between equipment, hose length and termination type are also important.
Metal-Gum specifies reinforced-hose applications in pumping stations, industry, mining and construction. The hoses can transport water, process and abrasive media, slurries, concrete, mortars and aggregates. Each application requires the compound and construction to be matched to the actual operating conditions.
If you first want to compare the hose construction itself, read the guide to reinforced hoses vs standard hoses.
Flexible reinforced hoses — what determines selection?
The product page separates several construction functions. The rubber compound is selected for the medium. The steel spiral protects the hose against collapse, flattening and kinking, while textile reinforcement layers carry pressure loads. Crimping and connections prepare the hose for installation.
The presence of reinforcement alone does not confirm compatibility with the medium, allowable temperature or pressure. These values must be read for the complete execution.
Which element should be checked for each operating condition?
| Installation factor | What must be verified | What to include in the enquiry |
|---|---|---|
| Medium | The rubber compound; the manufacturer specifies NR, EPDM and NBR selected for the medium. | The medium name, composition or concentration where relevant, and any variation. |
| Suction and vacuum | The steel spiral that protects against collapse, flattening and kinking. | The section operating under suction and the required vacuum conditions. |
| Pressure | The complete hose execution; the published ratings are PN6, PN10 and PN16. | Operating pressure and possible peak values. |
| Temperature | The complete execution; the published range is from −20 °C to +80 °C. | Continuous operating temperature, peak values and their duration. |
| Movement between equipment | Length, installation geometry and movement range. The product page does not publish minimum bend radii. | A sketch of the installation location, available length and expected movement. |
| Terminations | Crimping and connection type: flanges, couplings, threaded connections or quick couplings. | Connection standard, dimensions and installation-space constraints. |
Which data should not be inferred from the product page?
The current reinforced-hose page does not publish minimum bend radii for individual diameters, allowable hose twist, inspection intervals or routing rules for every installation geometry. These values must not be inferred from the DN, PN and temperature range alone.
If installation space is tight, the hose must absorb movement or service access is limited, include a sketch or photograph with the enquiry. The technical team can then assess the specific arrangement without relying on general assumptions.
Checklist before a technical enquiry
- Describe the medium and its conditions, including composition or concentration where relevant.
- Provide the continuous operating temperature and possible peak values.
- Provide the operating pressure and possible peak loads.
- State whether the installation operates in suction, delivery or combined suction-and-delivery service.
- Specify the required hose diameter and length.
- Describe movement or vibration between the connected equipment.
- Provide the available installation space; for unusual geometry, attach a sketch or photograph.
- Specify the required flanges, couplings, threaded connections or quick couplings.
- Describe service access and the planned hose-replacement method.
Common mistakes
- treating “demanding conditions” as a sufficient description of the installation;
- treating the steel spiral as confirmation of compatibility with every medium;
- transferring a DN, PN or temperature range to another execution;
- omitting suction or vacuum conditions;
- using an indicative compound table as a completed material selection;
- omitting length, movement and available installation geometry;
- selecting terminations without checking dimensions and the connection standard.
Frequently asked questions
Does one flexible reinforced hose suit every demanding application?
No. Metal-Gum publishes a defined diameter, pressure and temperature range and several rubber compounds selected for the medium. Each installation requires these data to be considered together with suction or delivery service, movement between equipment, hose length and terminations. The term “reinforced hose” alone is not a complete specification.
What should be done when conditions fall outside the published range?
Do not assume that another execution is available without the manufacturer’s confirmation. Provide the technical team with the actual pressure, temperature, diameter, medium and installation method. Only then can Metal-Gum confirm whether it offers a solution suitable for the specific arrangement.
How should demanding conditions be described in an enquiry?
Instead of using a general phrase, provide the medium, pressure, temperature, service mode, diameter, length, movement between equipment and terminations. Where space is limited, attach a sketch or photograph of the installation location. This shows which data fall within the published range and which require separate confirmation.
Prepare a description of the operating conditions
Published parameters, construction and available terminations are listed on the Reinforced hoses product page.
Send the complete data and an installation sketch to the Metal-Gum technical team so that the execution can be confirmed before ordering.
