EN 1092-1 12B DN65 PN10-100 Groove Surface Flange

Industrial Process Systems
Chemical and Pharmaceutical Industry: Conveying process water, cooling water, low-pressure steam (<100°C), compressed air, and intermediate liquids with low corrosivity. The DN65 pipe diameter is often used for branch pipelines or interfaces of medium-sized equipment.
Water Treatment and Environmental Protection Engineering: It is one of the main specifications for reverse osmosis (RO) systems, ultrafiltration (UF) systems, water pump inlets and outlets, and pipelines of dosing systems. It is used to connect filters, pressure vessels, circulating pumps, etc.
Food and Beverage Industry: Used in CIP (Clean-in-Place) systems, material conveying pipelines (such as syrup, dairy products), process water pipes, etc. The material is usually stainless steel AISI 304 or 316L.

Utility Engineering and Building Services
Heating, Ventilation, and Air Conditioning (HVAC): Connecting chilled water and cooling water pipelines of equipment such as cooling towers, chillers, air conditioning water pumps, and large fan coils. DN65 is a very common pipe diameter in central air conditioning systems.
Fire Protection Systems: Used for pipeline connection of wet or dry fire hydrant systems and sprinkler systems.
Water Supply and Irrigation: Used for connection of pump stations, main pipeline bifurcations, control valve groups, etc., and is suitable for municipal reclaimed water and large-scale agricultural irrigation systems.