Pipe connectors for extraction and ventilation systems

Pipe connectors are coupling components designed to join two pipes securely, tightly and with electrical continuity. WELAfix pipe connectors are specifically developed for industrial extraction and conveying systems, particularly for our extraction pipes. An integrated adjustment screw allows quick installation without specialist tools. Conductive EPDM seals and integrated grounding straps provide additional electrical safety during operation.

As part of the Swedish Lajac Group, WELAfix has supplied industrial connectors for round pipes for decades. You benefit from short delivery times and a product range specifically designed for extraction technology. Our selection includes stainless-steel connectors, galvanised steel connectors and versions for heavy-wall pipes, with diameters from 80 to 900 mm depending on the model.

Which pipe connectors are available from WELAfix?

Our range includes stainless-steel pipe connectors, galvanised connectors and connectors for heavy-wall pipes. These three product groups are designed for different environments and operating requirements.

The right version depends on the conveyed medium, the operating environment and the expected mechanical load.

Stainless-steel pipe connectors

Stainless-steel pipe connectors are the preferred choice for hygienically sensitive applications and aggressive media. They offer lasting resistance to moisture, chemical vapours and cleaning agents, making them suitable for food-processing plants, laboratories and the chemical industry.

Galvanised pipe connectors

Galvanised pipe connectors are the cost-effective standard solution for indoor use and protected outdoor areas. The galvanised coating reliably protects the steel body against corrosion, making this the most commonly used version in general extraction and conveying systems.

Pipe connectors for heavy-wall pipes

Pipe connectors for heavy-wall pipes are designed for high mechanical loads and wear-intensive applications. They are used wherever abrasive materials such as chips, granules or dusts are conveyed and thicker pipe walls are therefore required.

How do I find the right pipe connector for my application?

The right pipe connector is selected according to three main criteria: the pipe material, the conveyed medium and the expected mechanical load. The following table provides a clear comparison of our three product ranges.

As a general rule: The galvanised version is suitable for standard indoor applications. Choose stainless steel for aggressive media or hygienic requirements. For abrasive materials and high mechanical loads, use the heavy-wall version.

Where are pipe connectors used?

Pipe connectors are used wherever pipe constructions must be joined quickly, securely and in a way that allows them to be disconnected again when required. Their applications can be divided into indoor and outdoor use.

Indoor applications

Indoor applications mainly include production facilities and building-service systems. Typical uses include:

  • Pneumatic conveying systems in production plants, often combined with a flexible extraction hose at transition points

  • Extraction systems in woodworking facilities

  • Food-processing plants with strict hygiene requirements

  • Supply systems for heating, gas and water

  • Workshops and production lines with central dust extraction

Outdoor applications

Outdoors, pipe connectors are frequently used in agricultural systems, infrastructure projects and temporary structures. Typical applications include irrigation and conveying systems in agriculture, railings and barriers in infrastructure projects, as well as scaffolding structures and mobile roofing for temporary installations.

In these applications, the quick installation method is particularly beneficial because assembly and dismantling can be completed without specialist tools.

What advantages do WELAfix pipe connectors offer for industrial use?

WELAfix pipe connectors combine four key product features that make them particularly suitable for industrial extraction and conveying systems. Each feature addresses a practical requirement.

  • Quick installation: An integrated adjustment screw allows the connector to be tightened and released by hand or with standard tools, saving time during installation and maintenance.

  • Electrical safety: Integrated grounding straps and conductive EPDM seals safely dissipate static electricity. This is particularly important in potentially explosive environments and dust extraction systems.

  • Precise fit: Accurate manufacturing tolerances reduce adjustment work during installation and provide tight connections without additional sealing materials.

  • Secure fastening: The clamping force of the connectors provides reliable support even under high mechanical loads and vibration, for example in pneumatic conveying systems.

This combination makes our pipe connectors a preferred solution for operators of extraction systems who require fast installation and reliable operation.

What are the technical specifications of our industrial pipe connectors?

The technical specifications vary depending on the version and pipe diameter. The following key data provide an initial overview. Detailed values can be found on the relevant product pages.

  • Pipe diameter: Galvanised and stainless-steel pipe connectors from 80 to 710 mm; heavy-wall versions from 80 to 900 mm, depending on the model

  • Materials: Hot-dip galvanised steel, stainless steel and heavy-wall steel versions

  • Seals: Conductive EPDM seals with defined conductivity classifications

  • Grounding: Integrated grounding straps for dissipating static electricity

  • Temperature resistance: Depends on the seal material and product version

How should extraction pipe connectors be maintained?

Galvanised and heavy-wall pipe connectors do not normally require special maintenance. Stainless-steel versions can be cleaned with mild cleaning agents when required to preserve the surface finish.

Note on the adjustment screw: On pipe connectors with an exposed adjustment screw, slight surface corrosion may occur in areas with high humidity or during outdoor use. This does not impair the function of the connector and can be prevented by applying a small amount of corrosion-protection spray during installation.

Buy pipe connectors or request expert advice

Not sure which pipe connector is suitable for your pipe system? Our technical team will be pleased to advise you by telephone on +49 2522 830052, by email at info@welafix.de or via our contact form. For a complete overview of diameters, prices and available versions, we also recommend our current product catalogue.

FAQ – frequently asked questions about pipe connectors

Which material is suitable for which application?

Galvanised pipe connectors are the standard solution for indoor areas and protected outdoor locations. Choose stainless steel for aggressive media or hygienic requirements. Heavy-wall versions are suitable for abrasive materials and high mechanical loads.

How do I choose the correct diameter for my pipe connector?

The decisive measurement is the outside diameter of the round pipe to be connected. WELAfix pipe connectors are matched to the common internal diameters of WELAfix extraction pipes and cover a range from 80 to 900 mm. This makes them suitable for both workshop extraction systems and large industrial installations.

For third-party pipes, check the outside diameter and select the connector accordingly. If the dimensions differ, our team will be happy to advise you individually.

Are WELAfix pipe connectors suitable for outdoor use?

Yes. Galvanised and stainless-steel versions are suitable for outdoor applications. Stainless steel is the more durable option for permanent exposure to weather or aggressive environments.

For exposed adjustment screws, we recommend applying corrosion protection once during installation.

Does the quick installation really work without specialist tools?

Yes. The integrated adjustment screw can be operated by hand or with a standard screwdriver. Specialist tools, welding and thread cutting are not required, considerably reducing installation time.

What are grounding straps and conductive EPDM seals used for?

Both components safely dissipate static electricity that may occur when dust, chips or powders are conveyed. This is particularly important in potentially explosive environments and ATEX zones, where it helps prevent sparking.

Do the connectors fit every pipe?

WELAfix offers separate product ranges for thin-wall standard pipes and heavy-wall pipes. Thin-wall extraction pipes are generally connected using standard galvanised or stainless-steel connectors. Heavy-wall pipes require the specially designed heavy-wall connector range.

Which standards and certifications do the products meet?

The relevant standards and classifications vary depending on the product. Information about conductivity classes and industry-specific requirements can be found on the individual product pages. Please contact our sales team if you require specific certificates or supporting documentation.

How long does delivery take?

WELAfix is known for short delivery times. Products available from stock are generally dispatched within 2–5 working days. Specific shipping information for your selected product can be found during checkout or in our delivery information.