High-temperature · up to +400 °C
METAL HOSE 375 HT
Heat-resistant metal hose up to +400 °C, abrasion-resistant and electrically conductive. ATEX-approved for pneumatic transport of combustible dust in Zone 20, 21 and 22 (interior). Designed for conveying abrasive media under demanding operating conditions — heat, static-electricity risk and wear combined. The only one in the range that tolerates both +400 °C continuous AND ATEX zones at the same time.
- +400 °C heat-resistant
- ATEX Zone 20/21/22
- Conductive steel construction
- Abrasion-resistant metal wall
- Gas, dust, solid
- Cut to length
Why this hose?
METAL HOSE 375 HT is the unique combination in the range: +400 °C heat resistance AND ATEX approval. Where PUR-based HT hoses tolerate at most +150 °C, and where antistatic AS hoses often are not ATEX-marked, 375 HT covers both.
The practical example: aluminium smelters with pneumatic transport of hot particles in classified zones. Or extraction of hot combustible wood dust directly from a sanding robot. These are processes where a standard PUR hose would melt and where a standard antistatic hose lacks formal ATEX approval.
The steel construction is metal-conductive. Static electricity is dissipated directly through the steel structure — that is a more robust dissipation than the polymer-based conduction in AS hoses. Proper grounding is still a prerequisite.
Where it is used
In practice METAL HOSE 375 HT is seen on aluminium smelters, hot dryers and pneumatic systems for metallic powder handling where heat and combustible dust combine.
The formal product name is METAL HOSE 375 HT. In daily use: "the hot metal hose" or "375 HT".
Technical specifications
Specifications are current as of 15 April 2026 and refer to 20 °C unless otherwise stated.
| Material | Steel construction, heat-resistant |
|---|---|
| Colour | Steel grey |
| Wall construction | Spiral-folded steel |
| Temperature range | Up to +400 °C |
| ATEX marking | ATEX 2014/34/EU + TRGS 727: pneumatic transport of combustible dust (Zone 20, 21, 22 interior) |
| Electrical resistance | Metal-conductive via steel construction |
| Cut to length | Yes |
| Manufacturer SKU (model group) | 3752880 |
Dimensions and ordering
The table shows the main variants from the manufacturer's factsheet. Fields without a value (—) are not specified. Diameters, pressure values and bend radii are normative; weights and roll lengths are typical production values.
| Inner Ø |
Bend radius |
Max. length |
Weight |
Roll |
Article no. |
|---|---|---|---|---|---|
| 20 | 90 | 25 | 0.35 | 10 | 37500202880 |
| 25 | 98 | 25 | 0.43 | 10 | 37500252880 |
| 30 | 115 | 25 | 0.51 | 10 | 37500302880 |
| 32 | 124 | 25 | 0.53 | 10 | 37500322880 |
| 35 | 133 | 25 | 0.58 | 10 | 37500352880 |
| 38 | 136 | 25 | 0.63 | 10 | 37500382880 |
| 40 | 135 | 25 | 0.69 | 10 | 37500402880 |
| 45 | 143 | 25 | 0.75 | 10 | 37500452880 |
| 50 | 155 | 25 | 0.82 | 10 | 37500502880 |
| 55 | 173 | 25 | 0.9 | 10 | 37500552880 |
| 60 | 185 | 25 | 1.01 | 10 | 37500602880 |
| 65 | 198 | 25 | 1.09 | 10 | 37500652880 |
| 70 | 205 | 25 | 1.17 | 10 | 37500702880 |
| 75 | 218 | 25 | 1.25 | 10 | 37500752880 |
| 80 | 230 | 25 | 1.34 | 10 | 37500802880 |
| 90 | 235 | 25 | 1.82 | 10 | 37500902880 |
| 100 | 250 | 25 | 2.01 | 10 | 37501002880 |
| 102 | 250 | 25 | 2.08 | — | 37501022880 |
| 110 | 275 | 25 | 2.21 | 10 | 37501102880 |
| 120 | 320 | 25 | 2.4 | 10 | 37501202880 |
| 125 | 338 | 25 | 2.5 | 10 | 37501252880 |
| 130 | 345 | 25 | 2.89 | 10 | 37501302880 |
| 140 | 360 | 25 | 3.1 | 10 | 37501402880 |
| 150 | 385 | 25 | 3.32 | 10 | 37501502880 |
| 160 | 410 | 25 | 3.54 | 10 | 37501602880 |
| 170 | 435 | 25 | 3.72 | — | 37501702880 |
| 180 | 455 | 25 | 3.97 | 10 | 37501802880 |
| 202 | 460 | 20 | 5.37 | 5, 10 | 37502002880 |
| 225 | 518 | 20 | 6.02 | 5, 10 | 37502252880 |
| 250 | 575 | 20 | 6.68 | 5 | 37502502880 |
| 275 | 633 | 20 | 7.33 | 5 | 37502752880 |
| 280 | 645 | 20 | 7.6 | — | 37502802880 |
| 300 | 700 | 20 | 7.99 | 5 | 37503002880 |
| 500 | 1.92 | 8 | 19.9 | — | 37505002880 |
Overpressure and underpressure values are recommended operating limits; the product can be subjected to higher loads on request. Bend radius is measured along the inside of the hose bend.
Standards and compliance
The hose is certified or documented to the following standards:
- ATEX 2014/34/EU + TRGS 727. Pneumatic transport of combustible dust in Zone 20, 21 and 22 interior.
- REACH (EC 1907/2006) and RoHS 2011/65/EU. The manufacturer holds declarations of compliance.
Documentation and downloads
Additional documents about this hose, its compliance and installation. Click to download as PDF in a new tab.
Help with material selection
If you are choosing a hose and are uncertain about the right resistance level or zone classification, these two articles are a good place to start:
Industries that use it
The hose is used where +400 °C combines with ATEX requirements:
Metal, wood, paper and glass/ceramic industries use the hose for processes combining high temperature and combustible dust — the only solution that formally covers both.
Custom lengths and assemblies
The hose can be cut to length and assembled with couplings, cuffs and threaded fittings through Particulair's custom hose assemblies.
We offer guidance on material choice, coupling system and grounding, so the hose fits correctly into the overall system. If there is any doubt about zone classification or resistance requirements, a short conversation before ordering is well worth the time.
Frequently asked questions
Does the hose really tolerate +400 °C combined with ATEX?
Yes, that is exactly 375 HT's unique proposition. The steel construction tolerates continuous operation up to +400 °C and is simultaneously ATEX-approved for pneumatic transport of combustible dust in Zone 20-22. For combined high-temperature and ATEX applications it is the preferred solution.
Why metal-conductive rather than AS-formulated?
Metal conductivity via steel is more robust than polymer-based AS formulation — it does not age or degrade with heat. For high-temperature applications it is the only reliable solution.
Can the hose be supplied cut to length with couplings?
Yes. METAL HOSE 375 HT can be cut to length and assembled with couplings, cuffs and threaded fittings through Particulair's custom hose assemblies. We provide guidance on coupling system and sealing so the hose fits correctly into the overall installation.
How do I order the hose, and where do you deliver?
The hose is ordered through Particulair (Karlslunde, Denmark). We deliver to Denmark, the EU and selected third countries such as Norway and Switzerland. Standard dimensions can typically be delivered in 1-2 weeks; custom assemblies and larger volumes require slightly longer lead time.
What is the hose's expected service life?
Service life depends on operating conditions: loading, temperature, chemical exposure, UV and mechanical movement. In standard industrial use, expected life is 3-7 years. Aggressive conditions (high temperatures, continuous flexing, chemical vapours) reduce service life. We recommend regular visual inspection for cracks, deformation or discolouration.
How is the hose best stored before use?
Store the hose dry, at room temperature (15-25 °C) and out of direct sunlight. Avoid contact with ozone-generating equipment (welding equipment, engines). If stored on a reel, the bend must be larger than the specified minimum radius to avoid permanent deformation. Proper storage significantly extends shelf life.
What is the minimum bend radius, and what happens if I go below it?
Minimum bend radius is the smallest radius the hose can be bent to without permanent deformation or internal damage. The table above shows specific values for each dimension. Bending the hose below this limit can collapse the wall, kink the spiral or damage the inner coating. The result is reduced flow, increased pressure loss and shorter service life. Always use bend radius as a design constraint in installation.
Does the hose need to be grounded to function as an ESD component?
Yes, proper grounding is a prerequisite. The antistatic or conductive wall only dissipates static electricity if the hose is connected to ground at both ends — typically via grounded couplings on machine and tank. Without grounding, the electrical property has no practical effect and the ATEX approval is not valid in practice. We always recommend measuring loop resistance after installation.