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Plastic flange

A plastic flange provides the connection between two tubes in (plastic) pipe systems. Ridderflex supplies these flanges in different types and different materials.

Application of a plastic flange

Pipelines can be connected to each other by flanges, bolts and nuts. Also equipment or valves that are connected between pipelines are often fitted with a plastic pipe flange. A flange gasket is placed between the flanges to make the connection gas proof or liquid proof. The sealing surface of the plastic pipe flange is provided with a packing groove in order to realise a good sealing effect.

Different types

We supply plastic flanges amongst others in the following types:

Blind flangeApplied as pipe end closure.
Fixed flangeUsually fixed with a welded connection.
Transition flange / Loose flangeIs slid over the pipe or tube. The pipe end is provided with a sleeve.

Are you looking for a different type? Please contact our sales department.

Different materials

Flanges can be made in different qualities of plastic. The possibilities include:

Hard PVC
Polypropylene (PP)
Polyethylene (PE)
PTFE virgin (Tefon®)
PTFE e-kohle
Polyamide (PA)
Polycarbonate (Lexan®)
Acrylic (Perspex®)

Custom-made flanges

Ridderflex manufactures high-quality custom-made flanges. This can be based on a drawing or model. Are you curious about the possibilities? Please call +31 (0) 180 46 34 71 or mail to


Related to plastic flange

  • Milling


    Ridderflex has the right machines and tools to mill all plastics. We manufacture products with highly complex shapes and to a guaranteed high level of accuracy.

  • Flange gaskets

    Flange gaskets

    Custom-made flange gaskets of non-asbestos sheeting (a.o. Ridderflex Universal ®), graphite and rubber. Also PTFE seals, rubber steellined gaskets and flange-insulation sets.


ISO including co-engineering

Ridderflex complies with international quality management requirements. We are now also certified for co-engineering – our strength – . Read more


Any questions about products or make an enquiry? Simply call us or send us an e-mail. +31 (0) 180 46 34 71