NORPLAST® full plastic hoses
NORPLAST® is the full plastic hose construction from NORRES BAGGERMAN — a spiral-welded hose with a hard plastic spiral embedded in the wall instead of spring steel. The result is a lightweight, chemically inert hose with a smooth interior surface and good vacuum capacity. Available with or without an inner liner, and with an optional stranded earthing wire for ATEX areas.
Construction description
NORPLAST is built from a spirally embedded hard plastic profile. The profile is wound spirally and welded together with strips of the same plastic material — the wall and the spiral are two versions of the same material family. That gives the construction a chemical homogeneity and removes the risk that a steel spiral corrodes or reacts with the medium. The weld seam is coherent, gas- and liquid-tight.
The hard plastic spiral is stiffer than a spring steel wire and gives the construction good vacuum capacity — it does not collapse under negative pressure. The trade-off is lower flexibility than spring-steel-based constructions, and the spiral softens at higher temperatures. NORPLAST is therefore suited to media at ambient or moderate temperatures where weight and chemical inertness matter more than maximum flexibility.
Without inliner
Without inliner, with earthing wire
With inliner
Variants
NORPLAST comes in three construction variants that build on the same base principle but address different jobs:
NORPLAST without inliner
The standard variant. Spiral-welded wall with a hard plastic spiral embedded — no inner liner, no extra wires. Optimal when the medium does not place special demands on the interior surface beyond what the wall itself provides. Smooth inside, gas- and liquid-tight, often available in full or partial colour from the factory.
NORPLAST without inliner, with stranded earthing wire
Same base construction as without inliner, but with a stranded earthing wire laid parallel to the plastic spiral. It gives the construction a limited electrical discharge capability — sufficient for ATEX zones where potentially charging media (granulate, dust) must be conveyed and where a pure plastic spiral would otherwise lack conductivity. Specific ATEX zone suitability depends on a documented test report.
NORPLAST with inliner
NORPLAST with an inner liner — typically polyurethane — added through a special manufacturing process that ensures uniform liner thickness and a secure bond between liner and wall. The inliner layer is used when the hose needs an interior surface that the wall material itself cannot deliver — for example higher abrasion resistance, better chemical resistance or lower internal friction. It is the variant typically chosen when the medium places specific demands the standard NORPLAST wall does not match.
Properties
- Smooth interior surfaceGood interior surface quality — reduces deposition and pressure loss, on a par with the other spiral-welded constructions.
- Good vacuum capacityThe hard plastic spiral is stiff enough to resist collapse under negative pressure — suited to suction applications.
- Low weightLighter than steel-armoured hoses of comparable dimension — no metal parts in the base construction.
- Chemically inert base constructionPlastic spiral and plastic wall are chemically homogeneous — no risk of metal components reacting with the medium.
- Optional inlinerAn inner liner (typically PUR) can be added where the interior surface must meet special demands.
- Optional earthing wireA stranded earthing wire can be added for limited electrical discharge in ATEX zones.
- Lower flexibility than spring steelHard plastic spiral is stiffer — less local bending flexibility than AIRDUC or PROTAPE.
- Customisable colourFull or partial colouring is available from the factory.
Applications
NORPLAST is typically used for conveying and extraction at ambient or moderate temperatures, where low weight and chemical inertness matter — pneumatic granulate transport, wood dust and chips in some woodworking applications, ventilation, and laboratory and pharma applications where a metal-free base construction is an advantage. NORPLAST with inliner is chosen where the medium is chemically or mechanically more demanding than the standard wall can handle.
In ATEX areas, the variant with stranded earthing wire is used in combination with antistatic formulations in the material. Specific zone suitability requires a documented test report — available in the ATEX documentation.
Manufacturer and distribution
NORPLAST® is developed and manufactured by NORRES BAGGERMAN in Gelsenkirchen, Germany — one of the world's leading producers of technical hose systems for industrial and process applications, ISO 9001:2015 certified by TÜV Rheinland. Particulair is the distributor for NORRES BAGGERMAN in Scandinavia and provides the local advisory work, customisation and installation support that makes the construction practical in your specific process.
Related constructions and documentation
Frequently asked questions about NORPLAST
When should I choose NORPLAST with an inliner over without?
The inliner variant is the right choice when the medium has demands on the interior surface beyond what the wall material itself can meet. The inliner layer is typically polyurethane and provides better chemical resistance, lower internal friction or higher abrasion resistance than the PVC wall. NORPLAST without inliner is more cost-effective and often sufficient for transporting air, neutral gases and dry bulk media — choose without inliner when the medium does not place special demands on the interior.
Why is NORPLAST less flexible than AIRDUC?
A hard plastic spiral is stiffer than spring steel. It preserves the hose shape and provides good vacuum capacity, but it also gives less local bending flexibility than a spring steel spiral. NORPLAST is, on the other hand, typically lighter than a comparable steel-armoured hose. Choose AIRDUC when flexibility is critical; choose NORPLAST when weight and interior smoothness matter most.
Can NORPLAST be grounded against electrostatic charge?
The hard plastic spiral cannot be grounded by itself — it is a plastic material, not an electrical conductor. But NORPLAST can be supplied with a stranded earthing wire alongside the plastic spiral. That gives limited discharge capability. ATEX zone suitability depends on material choice and a documented test report — all approved variants are listed in the ATEX & TRGS zones documentation.
What is the advantage of a hard plastic spiral over spring steel?
Two benefits: lower weight and higher chemical inertness. A NORPLAST in full plastic has no metal parts in its base construction — making it lighter than a comparable steel-armoured hose and removing the risk that metal components react with the medium. The trade-off is that hard plastic spiral softens at higher temperatures — for hot media or hot environments, spring-steel-based constructions like AIRDUC or BARDUC are the right choice.
Is NORPLAST suited to vacuum?
Yes. The hard plastic spiral is stiff enough to hold the hose cross-section under negative pressure — NORPLAST has good vacuum capacity. That is one of the construction's core properties together with the smooth interior surface. The specific vacuum limit depends on dimension, material choice and any inliner — check the data sheet or contact us.
Where do I find the specific NORPLAST models?
This construction page describes the construction principle. The actual NORPLAST variants (with material and certification details, dimension tables and lead times) are listed under the product overview. If you need help finding the right match for your application, contact us.