AIRDUC® PUR 350 FOOD-AS (MD) -- Food-grade antistatic polyurethane hose for pneumatic conveying of flour, grain and pharmaceutical products

Why this hose?

AIRDUC® PUR 350 FOOD-AS (MD) combines three properties that rarely sit in one place: food-grade approval per EU 10/2011 + EC 1935/2004 + FDA 21 CFR 177.2600, an antistatic wall (<10⁹ Ω) and a medium-duty PUR construction light enough for mobile applications. It is a combination that specifically covers food production and pharmaceutical powders in ATEX-classified zones.

Food-grade approval covers EU 10/2011 categories (test conditions are detailed in the factsheet) and is supplemented by GMP manufacturing per EC 2023/2006 — that is, it is manufactured under a quality management system in which traceability and contamination control are documented. That distinguishes it from plainly food-contact-approved PUR without GMP attestation.

The antistatic level (<10⁹ Ω) meets TRGS 727 and NFPA 652. That means the hose can be used in Zone 22 (dust) and Zone 1/2 (gas), provided it is properly grounded. For corresponding food applications without ATEX requirements, 351 FOOD (MD) is the recommended standard — it is the technically broadest food hose in the range.

Food dust and ATEX

Food dust can explode. Flour, sugar, cocoa, grain and milk powder are all documented as combustible under the right conditions (fine particle size, dust cloud, ignition source). That's why ATEX approval isn't only for chemical industry -- food factories have Zone 21 and 22 areas where antistatic or conductive hoses are required.

Where it is used

The hose is used where food contact and ATEX zone requirements arise simultaneously — that is a combination not common in the market, and it is the primary reason 350 FOOD-AS exists as a distinct product compared to the standard 350 AS (without food).

In practice it is most often seen on pneumatic transport lines where bulk food or pharmaceutical powders are conveyed between silos, dosing installations and packaging machines. The smooth inner surface reduces residues sticking to the wall and can be effectively cleaned between batches.

Other applications are industrial vacuum cleaners in food production, tablet presses in pharma, and central extraction systems at production where the dust is food-contact-related but simultaneously flammable. The size range is the classical AIRDUC MD scale — from Ø 25 mm up to the larger bulk dimensions.

The formal product name is AIRDUC® PUR 350 FOOD-AS (MD). In daily conversation we refer to it as an antistatic food hose or AIRDUC FOOD-AS hose.

Technical specifications

Specifications are current as of 2026-04-15 and refer to the manufacturer's data sheet.

Material	Food-grade polyurethane (PUR) with antistatic wall
Colour	Transparent
Wall construction	MD-thickness PUR wall with embedded steel spiral, antistatic formulation
Spiral material	Galvanised steel wire
Conveying media	Gas, dust, liquid, granulates (food)
Temperature range	−40 °C to +90 °C
Smooth interior	Smooth inner surface
Electrical resistance	Antistatic wall, <10⁹ Ω (ISO 8031)
Food approval	EU 10/2011 (Cat. E), EU 1935/2004, FDA 21 CFR 177.2600, GMP EC 2023/2006
ATEX marking	II 1/2GD (interior zone 0/20, exterior zone 1/21) -- antistatic per TRGS 727

Food contact

The hose is approved for direct contact with dry food in Category E (up to 70 °C). For other food types or higher temperatures the category and test conditions must be verified against the specific application.

Dimensions and ordering

AIRDUC® PUR 350 FOOD-AS (MD) is supplied in 61 standard sizes from inner Ø 25 mm to 500 mm -- the broadest range in the AIRDUC FOOD series. Each size has its own article number at the manufacturer. Standard roll length varies by dimension, and the hose can be cut to length.

Dimensions, pressure and vacuum data for AIRDUC® PUR 350 FOOD-AS (MD)
Inner Ø [mm]	Outer Ø [mm]	Wall thickness [mm]	Working pressure DIN 26057, 10 % elong. [bar]	Working pressure 50 % elong. [bar]	Vacuum DIN 26057 [bar]	Vacuum axially fixed [bar]	Bend radius [mm]	Max. length [m]	Weight [kg/m]	Roll [m]	Article no.
25.1	32.1	0.7	2.445	5.45	0.755	1	23	25	0.2	10	35000250000
30	37	0.7	2.055	4.57	0.63	1	26	25	0.24	10	35000300000
32	39	0.7	1.93	4.29	0.59	1	27	25	0.25	10	35000320000
35	42	0.7	1.77	3.94	0.54	1	29	25	0.27	10	35000350000
38	45	0.7	1.635	3.64	0.495	1	31	25	0.29	10	35000380000
40	47	0.7	1.555	3.46	0.47	1	32	30	0.31	10, 15	35000400000
45	52	0.7	1.39	3.08	0.42	1	35	30	0.34	10	35000450000
50.5	57.5	0.7	1.25	2.78	0.38	1	38	30	0.38	10, 15, 20	35000500000
50.6	58	0.7	1.25	2.78	0.38	1	38	20	0.38	—	35000510000
55	62	0.7	1.14	2.53	0.345	0.99	41	30	0.41	10	35000550000
60	67	0.7	1.05	2.33	0.315	0.83	44	30	0.45	10	35000600000
64.5	71.5	0.7	0.97	2.15	0.29	0.71	47	30	0.48	10	35000650000
64.5	71.5	0.7	0.97	2.15	0.29	0.71	—	20	0.48	—	35000630000
70	78	0.7	0.9	2	0.185	0.83	50	30	0.51	10	35000700000
75.6	83	0.7	0.84	1.87	0.175	0.72	53	30	0.55	10	35000750000
75.6	83.5	0.7	0.84	1.87	0.175	0.72	53	20	0.55	—	35000760000
80	88	0.7	0.79	1.75	0.16	0.64	56	30	0.58	10, 15	35000800000
85	93	0.7	0.705	1.56	0.145	0.51	59	15	0.62	—	35000850000
90	98	0.7	0.705	1.56	0.145	0.51	62	30	0.65	10	35000900000
98	106	0.7	0.635	1.41	0.135	0.66	67	20	0.71	—	35000980000
101.5	109.5	0.7	0.635	1.41	0.135	0.66	68	25	0.86	10, 15	35001000000
101.5	110	0.7	0.635	1.41	0.135	0.66	68	20	0.86	—	35001020000
110	118	0.7	0.575	1.28	0.125	0.55	74	25	0.93	10, 15	35001100000
115	123	0.7	0.55	1.22	0.12	0.5	77	25	0.97	10	35001150000
120	128	0.7	0.53	1.17	0.115	0.46	80	25	1.01	10	35001200000
126.5	134.5	0.7	0.51	1.13	0.11	0.42	83	25	1.06	10	35001250000
126.5	135	0.7	0.49	1.08	0.105	0.39	83	20	1.06	—	35001270000
130	138	0.7	0.49	1.08	0.105	0.39	86	25	1.09	10	35001300000
140	148	0.7	0.455	1.01	0.095	0.33	92	25	1.17	10	35001400000
151.5	159.5	0.7	0.425	0.94	0.075	0.36	98	20	1.29	10	35001500000
151.5	160	0.7	0.4125	0.91	0.0725	0.335	98	15	1.29	—	35001520000
155	163	0.7	0.4	0.88	0.07	0.31	102	10	1.32	—	35001550000
160	168	0.7	0.4	0.88	0.07	0.31	104	20	1.36	10	35001600000
170	178	0.7	0.375	0.83	0.065	0.28	108	20	1.44	—	35001700000
175	183	0.7	0.365	0.81	0.065	0.26	113	20	1.49	10	35001750000
178	186	0.7	0.355	0.78	0.06	0.24	115	15	1.51	—	35001780000
180	188	0.7	0.355	0.78	0.06	0.24	116	20	1.53	10	35001800000
182	190	0.7	0.3375	0.745	0.0575	0.215	118	15	1.56	—	35001820000
202.3	210.3	0.7	0.32	0.71	0.055	0.19	128	15	1.75	10	35002000000
202.3	211	0.7	0.32	0.71	0.055	0.19	128	15	1.71	—	35002030000
205	213	0.7	0.3025	0.67	0.0525	0.0845	130	15	1.73	—	35002050000
210	218	0.7	0.3025	0.67	0.0525	0.17	—	15	1.78	—	35002100000
220	228	0.7	0.285	0.63	0.05	0.15	142	15	1.86	—	35002200000
225	233	0.7	0.285	0.63	0.05	0.15	143	15	1.9	5, 10	35002250000
228.5	236.5	0.7	0.27	0.6	0.0475	0.135	145	15	1.93	—	35002280000
230	238	0.7	0.27	0.6	0.0475	0.135	—	15	1.94	—	35002300000
250	258	0.7	0.255	0.57	0.045	0.12	158	15	2.11	10	35002500000
254	262	0.7	0.25	0.56	0.045	0.11	160	15	2.14	—	35002540000
255	263	0.7	0.24	0.535	0.0425	0.1	—	15	2.15	—	35002550000
275	283	0.7	0.23	0.04	0.04	0.09	173	15	2.32	—	35002750000
280	288	0.7	0.23	0.51	0.04	0.09	176	15	2.36	—	35002800000
300	308	0.7	0.215	0.47	0.035	0.08	188	10	2.52	10	35003000000
305	313	0.7	0.2	0.435	0.0325	0.065	191	10	2.56	—	35003050000
320	328	0.7	0.2	0.435	0.0325	0.065	—	10	2.69	—	35003200000
325	333	0.7	0.185	0.4	0.03	0.05	—	10	2.73	—	35003250000
350	358	0.7	0.185	0.4	0.03	0.05	218	10	2.94	10	35003500000
356	366	0.7	0.18	0.4	0.03	0.06	222	10	3	—	35003560000
375	383	0.7	0.16	0.35	0.03	0.05	—	10	3.56	—	35003750000
400	408	0.7	0.16	0.35	0.03	0.05	248	10	3.8	10	35004000000
450	458	0.7	0.14	0.32	0.025	0.04	281	10	4.27	—	35004500000
500	508	0.7	—	—	—	—	313	10	4.74	—	35005000000

Note: Fields without a value (—) are not specified in the manufacturer's data sheet. Overpressure and underpressure are recommended operating limits; products can be subjected to higher loads on request. The bend radius is measured along the inside of the hose bend. Contact us for full specifications or special variants.

Standards and compliance

The hose is tested and documented in compliance with the following standards:

EU 10/2011 (Cat. E). EU regulation on plastic materials and articles intended to come into contact with food. The hose is tested in Category E (dry food at up to 70 °C).
EU 1935/2004. EU framework regulation for materials and articles intended to come into contact with food. The general compliance baseline.
FDA 21 CFR 177.2600. US Food and Drug Administration specification for polyurethanes in food contact.
GMP EC 2023/2006. EU regulation on good manufacturing practice for food contact materials.
ATEX 2014/34/EU and TRGS 727. The hose's antistatic wall meets the requirements for conveying combustible food dust in ATEX Zone 21 and 22.
DIN 26057 Type 2. German industry standard for hoses for pneumatic conveying; Type 2 covers MD constructions.
REACH (EC 1907/2006). EU regulation on the registration, evaluation, authorisation and restriction of chemicals. The hose materials comply with REACH; a manufacturer declaration is available for download.
RoHS (Directive 2011/65/EU). Restriction of Hazardous Substances -- restriction on the use of certain hazardous substances in products. The hose components comply with the RoHS limit values.

Documentation and downloads

Additional documents about this hose, its compliance and installation. Click to download as PDF in a new tab.

Data sheet (Particulair) Complete Particulair-branded data sheet with technical specification, dimensions and contact information. PDF REACH declaration Manufacturer declaration of compliance with REACH (EC 1907/2006). In English. PDF · 2026 RoHS declaration Manufacturer declaration of compliance with the RoHS Directive (2011/65/EU). In English. PDF · 2025 ISO 9001 certificate Quality management certificate for the production facility. In English. PDF Installation guidelines General guidelines for correct installation, assembly and use of industrial hoses. In English. PDF · 2025

Industries that use it

The hose is used across a wide range of industries where food approval and antistatic dissipation are combined.

In the food industry, 350 FOOD-AS (MD) is the default choice on pneumatic transport lines for dry foodstuffs — flour, sugar, grain, spices and other granular ingredients. It covers EU 10/2011 and FDA 21 CFR 177.2600, and GMP manufacturing per EC 2023/2006 means traceability and the likelihood of contamination is documented throughout the production chain.

In the pharmaceutical industry, it is used for powder handling at tablet presses and dosing installations, where the antistatic property is decisive — fine powders develop electrostatic charges in transit, and that is a genuine ignition source in classified zones. The hose is ATEX-approved for Zone 0/1/2 (gas) and Zone 20/21/22 (dust), so pharmaceutical production with flammable fine powders is covered.

In agriculture and animal-feed industries, it sits in grain, seed and feed handling on silo installations and pneumatic conveying systems. In chemical and ceramic industries, it is used for granulates and powders where the medium may simultaneously develop electrostatic sparks. The broad ATEX approval means the same hose can be used across processes where a standard food hose (without AS) would not meet the zone requirements.

Custom lengths and assemblies

AIRDUC® PUR 350 FOOD-AS (MD) can be cut to length and assembled with cuffs, ferrules and threads to fit your installation precisely. We supply finished hose assemblies with crimped ferrules, clamping cuffs or threaded connections depending on what the process requires.

For ATEX installations it is particularly important that couplings and assemblies preserve the hose's electrical continuity. The whole system has to dissipate static electricity to ground -- not the hose alone.

See our custom hose assemblies

Related hoses

Hoses often considered alongside this one. Suggestions are based on the same category and similar properties.

Frequently asked questions

Is the hose approved for direct food contact?

Yes. The hose is approved per EU 10/2011 (plastics in contact with food), EU 1935/2004 (framework regulation) and FDA 21 CFR 177.2600. This means the materials are tested and documented for direct contact with food under specified conditions.

What does GMP EC 2023/2006 mean?

EC 2023/2006 is the EU regulation on good manufacturing practice (GMP) for materials intended for food contact. The hose is produced under a quality system that meets the requirements -- from raw materials to finished product.

Is the hose ATEX approved?

Yes. The hose complies with ATEX 2014/34/EU and TRGS 727 for the zones specified by the ATEX marking. This is particularly relevant when conveying flour, sugar and other combustible food dust where ignition risk has to be controlled.

Can the hose be cleaned in place (CIP/SIP)?

It depends on the temperature and the cleaning agent. The hose tolerates temperatures within its normal range -- if the CIP cycle runs above this, a high-temperature hose may be a better fit. The chemical resistance table shows material tolerance against cleaning agents.

Can I have the hose cut to length?

Yes. AIRDUC® PUR 350 FOOD-AS (MD) is cut to your length and we fit food-grade couplings and assemblies so the installation meets hygiene requirements.

What is the lead time?

Standard variants are typically in stock with a few days' lead time. Special variants depend on the manufacturer's production -- we give you a precise date when you contact us.

AIRDUC® PUR 350 FOOD-AS (MD)