Structural sewer fittings are a key component in the construction of durable and efficient sewer networks. At Onninen we offer a wide selection of these products. Our experience shows that properly selected fittings significantly affect the quality of the entire installation. We often come across questions about their properties and applications.

Structural shapes are distinguished by their wall structure. It has a special layered structure. This ensures high circumferential stiffness. At the same time, the shapes remain lightweight. This facilitates transport and assembly. Our offer includes products from renowned brands. Among them are our own brands: Onnline and FXA.

Types of structural sewage fittings - a wealth of choice

The range of structural shapes is very extensive. It includes various types and sizes. PP-KAN double-socket elbows are particularly popular. They come in many diameters. They are available in both the DN/OD and DN/ID systems. Here are some sample sizes:

Double socket elbow PP-KAN DN/OD: 160, 200, 250, 315, 400
Double socket elbow PP-KAN DN/ID: 150, 200, 250, 300, 400, 500, 600, 800

The choice of the right size depends on the design of the installation. The sewage flow and ground conditions must be taken into account. In our daily practice, we see that a well-chosen size is the basis for an efficient system. We often advise clients on this issue.

Structural sewer fittings - selection criteria and application

When choosing structural shapes, several factors should be considered. The key ones are:

Type of land
Foundation depth
External loads
Type and amount of sewage

Our experience shows that the right selection translates into many years of failure-free operation of the system. Structural shapes are suitable for both home installations and large infrastructure projects. Recently, in a project for a large housing estate, we used PP-KAN DN/OD 315 double-socket elbows. They proved to be excellent.

In the case of difficult ground conditions, we recommend shapes with greater circumferential stiffness. They provide better resistance to deformation. For areas with high groundwater levels, it is worth considering products with additional sealing. This increases the tightness of the connections.

Onninen recommends structural shapes for various applications. They are perfect for sanitary and storm sewers. They are also used in road drainage systems. Their durability and corrosion resistance are great advantages.

Innovations in structural sewage fittings

The market for structural shapes is constantly developing. New technological solutions are emerging. At Onninen, we follow these trends and introduce innovative products to our offer. We are increasingly encountering questions about shapes with the addition of recycled materials. This is a response to the growing ecological awareness of customers.

The new products are structural shapes with increased resistance to abrasion. They are suitable for systems transporting sewage with a large amount of suspensions. Our offer also includes products with increased chemical resistance. They are ideal for industrial applications.

Many customers ask us about the possibilities of connecting different systems. We offer special transition fittings. They enable the integration of new sections with existing infrastructure. This is a practical solution for network modernizations and expansions.

At Onninen, we focus on comprehensive service. We offer not only products, but also professional advice. Our specialists will help you choose the optimal solutions. We invite you to contact us and take advantage of our experience in the field of structural sewage fittings.

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