High-temperature · up to +90 °C
METAL HOSE Agraff PUR 151 AD
METAL HOSE Agraff PUR 151 AD is a highly flexible cable protection hose with agraff-folded steel strip construction and external PUR coating. The hose is qualified to IP 68 per EN/IEC 60529 - dust-tight and continuous water immersion. The operating range is -40 to +90 C with short-term peak +125 C (the PUR coating's limit). The hose is typically used for cable protection in electrical installations, control cabinets, automation, flexible robots and marine installations where robust mechanical protection and IP 68 sealing are required.
- -40 to +90 C
- IP 68
- Agraff-folded steel
- PUR coating
- Cable protection
- Water and dust-tight
Why this hose?
The Agraff construction is a specialised metal hose seam that combines high flexibility with strong mechanical resistance. Instead of a continuous metal spiral (as corrugated stamping would give), the agraff is an S-shaped steel strip seamed back on itself along the hose length. This means the hose can be bent like a true spring without the metal being overstressed, while resisting compression and crushing better than most plastic-based protective conduits.
The PUR coating is what makes this specific variant suitable for IP 68 installations. The external polyurethane coating fills the gaps between the agraff seams and provides a continuous, water-tight outer surface. Without the coating the hose would only be IP 40 (dust-tight only). Note however that the coating is the limiting factor for temperature (PUR tolerates up to 90 C continuous) - for heat-exposed installations above +90 C we recommend a VA variant without coating.
The dimensional balance is specific: ID 13-22 mm accommodates typical industrial cable bundles (4-6 power cables or 8-12 signal cables), and the corresponding nominal connecting-part width range (17-27 mm) matches standard cable glands in M and PG threads. This makes the hose directly compatible with existing cabinet connections without adapters.
Where it is used
Industrial control cabinets use the hose for cable runs between cabinet wall and moving elements (motor flanges, sensor arms, door hinges). The hose's flexibility allows the cabinet doors to be opened daily without the cables being pulled or worn, and the IP 68 sealing ensures contamination does not enter even during opening procedures.
Welding robots and automated production cells use the hose for cable protection on the robot arm's joints. Each joint movement bends the hose, and over millions of cycles, Agraff construction is the only one that holds without the metal breaking. The PUR coating prevents sparks and heat release from the welding process from destroying the hose.
Marine installations on ships and offshore platforms use the hose for cable distribution on deck and in humid zones. IP 68 sealing resists salt spray and regular high-pressure cleaning, and the galvanised steel core resists corrosion from salt water contact over several years of operation.
The hose is colloquially known as metal hose, cable conduit, agraff hose or PUR-coated metal hose.
Technical specifications
The hose's key specifications are briefly summarised below. The table shows actual dimensions; note that 'nominal width connecting parts' in the factsheet refers to the effective outer dimension for coupling connection, not the actual outer dimension of the agraff fold.
| Construction | Agraff-folded steel strip with external PUR coating |
|---|---|
| Inner steel | Galvanised steel strip (S-shaped seam) |
| Outer coating | PUR (polyurethane) |
| Colour (outer coating) | Metallic blue |
| Temperature range | -40 to +90 C (peak +125 C short-term) |
| IP rating | IP 68 per EN/IEC 60529 (dust-tight and continuous water immersion) |
| Standard pack length | 50 m per roll |
| Number of dimensions | 3 (ID 13, 17, 22 mm) |
| Application | Cable protection, switch cabinet, robotics, automation |
| Manufacturer SKU | 1519050 |
Dimensions and ordering
The table shows the hose's 3 standard dimensions with ID, nominal connecting-part width (outer dimension for couplings), bend radius and max production length. Weight is given per metre (converted from the factsheet's per-50m values).
| Inner Ø |
Outer Ø |
Bend radius |
Max. length |
Weight |
Roll |
Article no. |
|---|---|---|---|---|---|---|
| 13 | 17 | 65 | 50 | 0.272 | 50 | 15130179050 |
| 17 | 21 | 77 | 50 | 0.346 | 50 | 15130219050 |
| 22 | 27 | 101 | 50 | 0.494 | 50 | 15130279050 |
Fields without a value (—) are not specified in the manufacturer's factsheet. 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 qualified per the central standards for cable protection conduit and IP classification. EN/IEC 60529 IP 68 is the primary reference.
- EN/IEC 60529 IP 68. International classification of enclosure sealing - 6 = dust-tight, 8 = continuous immersion in water. Highest possible IP rating.
- RoHS Directive (2011/65/EU). Restriction of hazardous substances. Manufacturer declaration on file.
- REACH (EC 1907/2006). Registration of chemical substances. Manufacturer declaration on request.
- EN 50525. European standard for flexible low-voltage cables. Relevant for cable protection where the hose contains EN 50525-qualified cables.
- VDE 0282. German standard for flexible cables. Relevant for German-market installations.
- ISO 9001:2015. Quality management system at the manufacturer. Ensures each batch follows the same specification.
- EN 13501-1. European classification of building materials for fire properties. The hose is not specifically fire-classified; the PUR coating is not flame-retardant.
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
Although this hose isn't ATEX-relevant, these two articles provide useful background on electrical resistance and industrial safety — important if you later combine the hose with electrical equipment or work in mixed environments:
The invisible weakest link
Why a conductive or antistatic hose isn't sufficient on its own — and what grounding means for the complete system.
Know your ohm
The difference between antistatic and conductive, which resistance limits apply where, and how to measure them correctly.
Industries that use it
METAL HOSE Agraff PUR 151 AD is used where robust cable protection must be combined with IP 68 sealing - typically in industrial installations where mechanical wear, moisture and frequent bending require a metallic construction with plastic coating.
Electrical installations and automation form the main market. Switch cabinets, control cabinets and PLC installations use the hose to protect signal and power cables between cabinet wall and moving elements. The Agraff construction allows frequent bending (typically millions of cycles over service life) without cable insulation suffering, and the PUR coating ensures IP 68 sealing even when cabinets are opened regularly.
Robotics and flexible automation are secondary markets. Welding robots and pick-and-place machines have movement arms that bend the hose thousands of times over the workday. The Agraff construction is specifically designed for this use case: the seams allow movement without the steel strip breaking, and the PUR coating limits wear between hose and machine cabinet.
Marine and outdoor installations use the hose for cable protection where IP 68 is required due to saltwater, rain or high-pressure cleaning. The galvanised steel core resists corrosion far better than ordinary steel, and the PUR coating is UV-resistant enough for continuous outdoor exposure in moderate climates.
Custom lengths and assemblies
The hose can be delivered cut to desired lengths. The standard roll can be supplemented with shorter pieces or multiple rolls by arrangement.
At Particulair we advise on couplings and sizing. Send us a sketch of your application and we will assess the right variant and length.
Frequently asked questions
What is an 'Agraff' construction?
Agraff is a metal hose construction where the steel strip is folded in an S-shaped profile and seamed back on itself along the hose length. The construction provides high flexibility without losing mechanical strength - the hose can be bent many times in operation without the seams opening. METAL HOSE Agraff PUR 151 AD additionally has a PUR coating outside that increases IP rating to IP 68 and provides mechanical wear resistance.
What temperature does the hose tolerate?
The operating temperature is -40 to +90 C continuous with short-term peak up to +125 C. This is the PUR coating's limit - the metal core itself can handle much higher temperatures (the datasheet's claim of 600 C refers to the metal core alone, not the complete product). For continuous +600 C applications we recommend a VA variant without plastic coating.
What does IP 68 mean?
IP 68 is the highest IP rating in EN/IEC 60529 - dust-tight and continuous immersion in water. The PUR coating provides the IP 68 rating; the inner metal core alone would give only IP 40. IP 68 means the hose can be installed in marine and outdoor applications, in humid zones and where regular high-pressure cleaning is expected.
How many dimensions are in the range?
3 dimensions: ID 13, 17 and 22 mm with corresponding nominal connecting-part width of 17, 21 and 27 mm. Standard pack length is 50 m per roll. For other dimensions we recommend alternative metal hose variants in the Agraff-VA, PVC or standard metal hose family.
What is 'nominal width connecting parts' used for?
This is the effective outer dimension for coupling connection. The Agraff construction does not have a smooth outer surface - the seams cause the actual 'local' outer diameter to vary along the hose. 'Nominal width connecting parts' is the dimension to which standard couplings and fittings are optimised. When selecting couplings, they should match this dimension, not the ID.
Is the hose suitable for ATEX installations?
The hose has NO explicit ATEX declaration on the factsheet. The metal construction is naturally electrically conductive (it's metal!), so if the cable installation is correctly grounded, the hose functions as a conductive shield. For formal ATEX qualification we recommend consulting the installer - the factsheet notes 'Explosion hazard areas' under applications, suggesting the manufacturer considers the hose qualified, but there is no explicit ATEX 2014/34/EU declaration.
Which couplings are recommended?
Standard cable glands (PG or M thread) matching the nominal connecting-part width. Brass or stainless steel couplings are recommended for IP 68 applications. We typically fit couplings to the hose by arrangement - send us a configuration and we'll advise on coupling choice.
How long does the hose last?
The hose's service life depends on the environment. In dry indoor installations the PUR coating can last 10+ years. In outdoor installations with UV exposure or frequent bending, service life is typically 5-7 years. When the PUR coating begins to show brittleness (typically visible cracks), the hose must be replaced to maintain IP 68. The inner Agraff metal core has significantly longer service life than the coating.