PP-steel flange DN90-80 PN16 for flange sleeve 727700313

Polypropylene-to-Steel Connection in Industrial Installations

This component combines the chemical resistance of plastic with the mechanical strength of steel, making it a critical transition point in polypropylene (PP) piping systems. Designed for mounting on flange sleeves with a nominal diameter of DN 80, it ensures a leak-tight and durable connection to traditional metal installations. Thanks to the integrated steel insert, the design allows for safe bolt tightening without risk of damaging the soft plastic material—a common issue with standard flanges.

Application and Mounting Flexibility

This component is engineered for installations requiring corrosion resistance, such as chemical transport systems, process water networks, and wastewater treatment plants. Its versatility stems from the ability to drill holes for two pressure standards: PN10 and PN16. This means the same product can be used under various operating conditions, provided bolts and gaskets are appropriately selected. The inner diameter of the compression flange is 90 mm, precisely matching the outer diameter of DN 80 pipes, eliminating the need for additional reducers.

Key Construction Features and Operating Parameters

The construction is based on PP material with a reinforcing steel insert, ensuring dimensional stability under load. The component surface remains in its raw state—unpainted and uncoated—facilitating quality inspection of welds or bonded joints prior to installation and allowing for additional anti-corrosive protection at the steel interface if required by project specifications.

When planning installation, note the specific dimensions of this component: the bolt hole spacing (pitch circle diameter) is 160 mm, and the rated working pressure class is PN 16. The total weight is approximately 1.4 kg, making it light enough for easy handling during installation while remaining sufficiently robust to ensure connection stability.

Thanks to precise dimensions and the proven GEORG FISCHER design, this flange minimizes leakage risks at transition points between materials with different thermal and chemical properties. It is a dedicated solution for installations where durability and resistance to aggressive media transported in PP pipes are paramount.