Food/Pharma · FDA + EU 1935/2004
AIRDUC® PUR 356 FOOD (XHD)
Extra heavy-duty (XHD) food-grade PUR hose for pneumatic transport of highly abrasive food and ingredients. Reinforced wall construction ensures long service life for grain conveying, flour, sugar and granulates. EU 1935/2004 + EU 10/2011 + FDA 21 CFR 177.2600.
- Food-grade
- EU 1935/2004 + FDA
- Abrasion-resistant PUR wall
- Highly flexible
- Gas, dust, granulate
- Cut to length
Why this hose?
AIRDUC® PUR 356 FOOD (XHD) is the top tier of the food family where abrasion loading is the dominant selection criterion. Wall thickness is 2 mm — about as thick as PUR construction allows, and DIN 26057 Type 4 classified. That means markedly longer service life when conveying particularly abrasive foods such as granular sugar types, grain husks, salt fractions and similar.
Like the other FOOD variants, it is fully food-approved — tested across all EU 10/2011 categories (A, B, C, D2, E), approved per EC 1935/2004, FDA 21 CFR 177.2600 and manufactured under GMP EC 2023/2006. It also covers LFGB (German Food and Feed Code).
Wall thickness is a trade-off against flexibility — the XHD construction is heavier and less bendable than HD and MD. That means 356 FOOD (XHD) is not the default choice on mobile applications; it lives its life in central systems where service life against wear is the dominant parameter. For lighter abrasion loads, 355 FOOD (HD) is often sufficient.
Food approval concerns the whole system, not just the hose. The hose materials are tested for food contact (EU 1935/2004, EU 10/2011, FDA 21 CFR 177.2600), but couplings, gaskets and assemblies must also be food-grade for the complete installation to be compliant.
CIP/SIP cleaning requires that both hose and couplings tolerate the specified temperatures and chemicals. Always verify full system compatibility before installation.
Where it is used
The hose is used in food and pharma industry to transport dry and wet media — from flour and sugar to milk, juice and bakery products. The smooth inner wall prevents residue buildup, and cleaning between media changes is quick.
Typical systems are filling and packaging machines, transport between silo and mixing machine, and ingredient transfer in bakeries and dairies. The hose is CIP-cleanable for variants that specify it.
In food industry, beverage industry, dairy industry many different media are often handled. The broad food approval — categories A, B, C, D2 and E — makes the hose suitable for multi-purpose installations where the same system handles multiple products.
The formal name is AIRDUC® PUR 356 FOOD (XHD). In daily use it is referred to as "the XHD food hose" or "the extra-thick-walled food hose" — it is selected when 355 FOOD (HD) has not delivered sufficient service life in the actual duty.
Technical specifications
Specifications are valid as of 2026-04-15. Fields without a value are not specified in source data.
| Material | Food-grade polyurethane (PUR), extra heavy-duty |
|---|---|
| Colour | Transparent |
| Wall construction | Extra heavy-duty PUR wall, double thickness, embedded steel spiral |
| Conveyed media | Gas, dust, granulates and particles |
| Temperature range | −40 °C to +90 °C |
| Short-term peak | +125 °C |
| Smooth surface | Smooth interior |
| Electrical resistance | Insulating — not specified for ATEX use |
| Food-grade | Yes — EU 1935/2004, EU 10/2011, FDA 21 CFR 177.2600 |
| Cut to length | Yes — Particulair cuts the hose to your dimensions |
The hose materials are tested for contact with all food categories in EU 10/2011: A (aqueous), B (acidic pH<4.5), C (alcohol <20%), D2 (dairy) and E (dry foods). This covers the vast majority of industrial food applications in a single product.
Dimensions and ordering
AIRDUC® PUR 356 FOOD (XHD) is supplied in 18 standard sizes from inner Ø 32 mm to 152 mm. Each size has its own article number at the manufacturer. Standard roll length is typically 10 m, and the hose can be cut to length.
| Inner Ø |
Outer Ø |
Wall thickness |
Working pressure |
Vacuum |
Bend radius |
Max. length |
Weight |
Roll |
Article no. |
|---|---|---|---|---|---|---|---|---|---|
| 32 | 44 | 2 | 4.9 | 1 | 90 | 25 | 0.64 | — | 35600321001 |
| 38 | 49 | 2 | 4.19 | 1 | 104 | 25 | 0.73 | — | 35600381001 |
| 40 | 52 | 2 | 3.995 | 1 | 109 | 25 | 0.77 | — | 35600401001 |
| 50.5 | 62.5 | 2 | 3.245 | 1 | 134 | 25 | 0.95 | 10 | 35600501001 |
| 51 | 63 | 2 | 3.155 | 1 | 134 | 25 | 0.96 | — | 35600511001 |
| 60 | 72 | 2 | 2.735 | 1 | 156 | 25 | 1.11 | 10 | 35600601001 |
| 63 | 75 | 2 | 2.635 | 1 | 163 | 25 | 1.16 | — | 35600631001 |
| 65 | 76 | 2 | 2.535 | 1 | 169 | 25 | 1.18 | — | 35600651001 |
| 70 | 83 | 2 | 2.36 | 1 | 186 | 25 | 1.28 | — | 35600701001 |
| 75 | 88 | 2 | 2.21 | 1 | 195 | 25 | 1.37 | — | 35600751001 |
| 76 | 89 | 2 | 2.205 | 1 | 195 | 25 | 1.38 | 10 | 35600761001 |
| 80 | 92 | 2 | 2.075 | 1 | 205 | 25 | 1.44 | — | 35600801001 |
| 100 | 113 | 2 | 1.855 | 1 | 272 | 25 | 2.28 | 10 | 35601001001 |
| 102 | 115 | 2 | 1.7 | 1 | 272 | 25 | 2.32 | — | 35601021001 |
| 125 | 138 | 2 | 1.495 | 0.835 | 336 | 25 | 2.81 | — | 35601251001 |
| 127 | 140 | 2 | 1.37 | 0.825 | 336 | 25 | 2.86 | 5, 10 | 35601271001 |
| 150 | 164 | 2 | 1.25 | 0.695 | 435 | 20 | 3.71 | — | 35601501001 |
| 152 | 166 | 2 | 1.21 | 0.685 | 435 | 20 | 3.76 | — | 35601521001 |
Note: Fields without a value (—) are not specified in the manufacturer's factsheet. Overpressure and underpressure are recommended operating limits; the product can be subjected to higher loads on request. Bend radius is measured along the inside of the hose. Contact us for full specifications or special variants.
Standards and compliance
The hose is tested and certified to the following standards:
- DIN 26057 Type 2. German industrial standard for hoses used in pneumatic transport. Defines types, dimensions, pressure and vacuum requirements, and test procedures for industrial pneumatic hoses.
- EU 1935/2004. European framework regulation for materials in contact with food. The hose's components are tested to meet the general requirements for food contact.
- EU 10/2011. Plastics Implementation Measure — specific requirements for plastic materials in food contact. The hose is tested for categories A (aqueous), B (acidic pH<4.5), C (alcohol <20 %), D2 (dairy) and E (dry foods).
- FDA 21 CFR 177.2600. US Food and Drug Administration requirements for polyurethanes in food contact. The hose's food-grade approval is tested and documented in compliance with this regulation.
- REACH (EC 1907/2006). EU regulation on registration, evaluation, authorisation and restriction of chemicals. The hose's materials are REACH-compliant; manufacturer's declaration is available for download.
- RoHS (Directive 2011/65/EU). Restriction of Hazardous Substances — restriction on the use of certain hazardous substances in electronic products. The hose's components comply with RoHS limit values.
Documentation and downloads
Additional documents about this hose, its compliance and installation. Click to download as PDF in a new tab.
Industries that use it
The hose is used across a wide range of industries — below is an overview of the most typical industries where AIRDUC® PUR 356 FOOD (XHD) is used:
In the food industry, 356 FOOD (XHD) sits on the heaviest pneumatic transport lines — large bulk transfers of sugar, salt, flour and grain at industrial scale, where an HD construction is worn out too quickly. The XHD wall extends the replacement interval significantly.
In the pharmaceutical industry, it is used at tablet presses and powder transfer systems at high volumes. In dairies and dairy industry, it sits in transport of milk powder, whey powder and similar fractions. In agricultural and animal-feed industries, it features in bulk handling of grain and feed.
In the silo and bulk-transfer industry, it is central on the largest installations. In chemical and pump industries, it is used where the medium is food-contact-related but extremely abrasive. What unites these applications is that service life against wear is the dominant selection criterion; food approval is mandatory background, but it is not what dictates the choice between HD and XHD.
Custom lengths and assemblies
AIRDUC® PUR 356 FOOD (XHD) can be cut to length and assembled with couplings, cuffs and threads to fit your installation precisely. We produce complete hose assemblies with crimped ferrules, clamp collars or threaded connections, depending on what the process requires.
For food installations, couplings and gaskets must also be food-grade for the complete installation to be compliant. We select materials matching the hose's certifications.
Frequently asked questions
What's the difference between FOOD (HD) and FOOD (MD)?
The HD wall construction is more robust and wear-resistant than MD, ideal for high throughputs of abrasive food. MD is lighter and more flexible, suitable for smaller loads and tight installations.
Which food categories can the hose handle?
The hose is tested for all EU 10/2011 categories: A (aqueous foods), B (acidic foods pH<4.5), C (alcoholic beverages <20 %), D2 (dairy products) and E (dry foods such as grain and powder).
Can the hose be cleaned with CIP/SIP?
Yes, as long as cleaning medium and temperature are within specified limits. Steam cleaning up to +130 °C is typically acceptable short-term. Verify against the factsheet when in doubt.
Is the hose ATEX-approved?
Standard FOOD variants are NOT ATEX-approved — they are insulating. The AS variant (with antistatic surface) is ATEX-suitable for Zone 22, and the EC variant is fully conductive.
How long until the hose should be replaced?
Under normal food operation (non-abrasive media) the hose typically lasts 3-5 years. Visual inspection at each cleaning and functional testing during CIP cycles is recommended to catch early signs of wear or cracking.