How a technical hose is built
A technical hose looks like a simple product. It is not. It is the result of construction choices — spiral-welded or axially extruded, with spring steel or hard plastic, with or without an inliner. Those choices decide everything from whether the hose can withstand vacuum to how tightly it can bend. Here is the technical background.
It is rarely the material alone that determines whether a hose works
Two hoses can be moulded from the same polyurethane and behave completely differently. One runs for years under suction lines without cracking; the other collapses under the first proper vacuum. The difference does not lie in the material. It lies in the construction — how the wall is built, what kind of wire or spiral is embedded in it, how the weld seam is laid, and whether there is a separate inner liner.
That is the technical side of the hose you will find here. We go in depth on how NORRES BAGGERMAN builds its hoses, what the six basic constructions can do, and what trade-offs lie in choosing one over the other. It is the kind of knowledge that decides whether a hose investment lasts five years or fails in two months.
Three moments in the life of a hose
Before you choose, while you use, and when documentation is required — the technical knowledge connects across three stages:
How the hose is built
Before you choose a hose, you need to understand what you are choosing between. The six basic constructions each solve a different problem — and the difference is rarely obvious at first glance.
See the six constructions →The material and its limits
Once the construction is chosen, the material remains. PUR, PVC, PTFE, EPDM or silicone — depending on the medium, temperature, concentration and contact time. The resistance table is the dry factual ground.
See chemical resistance →Compliance and certificates
When the hose sits in an ATEX zone, a food production line or a regulated chemical plant, the choice must be documented. The manufacturer declarations from NORRES BAGGERMAN are gathered here.
Go to documentation →Hose constructions
The six fundamental ways NORRES BAGGERMAN builds a hose: AIRDUC profile hoses, PROTAPE film hoses (with the MEMORY variant treated as its own construction), NORPLAST full plastic hoses, CP clamp profile hoses, BARDUC hoses, and NORFLEX axially extruded hoses. Each construction is designed to solve a specific technical problem — here they are walked through one by one.
Read about the six constructions
The manufacturer — NORRES BAGGERMAN
The hoses in FlexCore are manufactured by NORRES BAGGERMAN in Gelsenkirchen, Germany — one of the world's leading producers of technical hose systems for industrial and process applications, with over 135 years of experience, ISO 9001:2015 certified by TÜV Rheinland, and with testing capacity covering everything from chemical resistance to ATEX zone classification. Particulair is the distributor for NORRES BAGGERMAN in Scandinavia and provides the local advisory work, customisation and installation support that turns the manufacturer's documentation into practical use.
Cross-references to documentation
The technical information on these pages leans on the formal papers in the documentation section. Here are the most-used cross-references:
Chemical resistance
Once the construction is chosen, the resistance table tells you whether the inner liner material can handle your medium. Covers over 1,400 substances against 16 materials.
Resistance tableTechnical data and materials
Material properties, thread standards (M, PG, NPT, G, UNEF) and IP classification per EN 60529. The dry reference sheet.
Technical dataInstallation and assembly
Bend radii, grounding against electrostatic discharge, and assembly per DIN 20066. Three guides for three hose types.
InstallationATEX & TRGS zones
Which constructions and material variants are approved for zones 0/1/2 and 20/21/22 per ATEX 2014/34/EU and TRGS 727. Complete list.
ATEX documentationFrequently asked questions
What is the difference between Technical info and Documentation?
Technical info explains how a hose is built, why the construction determines its properties, and how it behaves in service. Documentation collects the formal papers — test reports, certificates and declarations of compliance — that you need for an auditor, safety coordinator or QA officer. The two sections work together: construction understanding leads you to the right hose, and documentation proves it meets the requirements.
What is meant by a hose construction?
A hose construction is the way the wall of the hose is built — whether a wire is spirally embedded in it, whether the material is axially extruded or spiral-welded, whether there is a separate inner liner, and whether the wall is single- or multi-layered. The construction determines flexibility, vacuum capacity, weight, axial stiffness, abrasion resistance and how the hose folds. Two hoses made from the same material can behave very differently depending on the construction.
How many different constructions does NORRES BAGGERMAN offer?
NORRES BAGGERMAN builds its hose programme around six fundamental constructions: AIRDUC profile hoses, PROTAPE film hoses (with PROTAPE MEMORY as its own sub-construction), NORPLAST full plastic hoses, CP clamp profile hoses, BARDUC hoses, and NORFLEX axially extruded hoses. Each construction solves a specific technical problem.
Where can I find material data and resistance tables?
Material properties, thread standards and IP classification are under Technical data and materials. The chemical resistance table for over 1,400 media is under Chemical resistance. Both are accessible from the menu and linked from the individual construction pages where relevant.
Can a hose construction be customised for my application?
Yes. NORRES BAGGERMAN can adjust wall thickness, colour, dimension, inner liner, antistatic profile and reinforcement on every main construction. Particulair coordinates the customisation between you and the factory — typically faster than you would expect. Read more about custom hoses or contact us with your operating conditions.
Why is the construction more important than the material alone?
The material determines which chemicals and temperatures the hose tolerates. But the construction determines whether the hose can carry the medium without collapsing under vacuum, whether it can bend around corners without folding, and whether it can withstand external wear. A hose with a perfect material choice still fails if the construction does not match the load. That is why both must be chosen together.