Flange Housing

The flange housing is a critical component of sight glass assemblies that serves as the mounting structure and sealing interface between the sight glass and the equipment vessel or pipeline. It provides a secure, leak-proof connection while allowing visual inspection of process fluids or materials. This part is typically manufactured from stainless steel 316, carbon steel, or alloy steel, with material grade options such as 304 or 316L for corrosive media. The housing is designed to accommodate nominal sizes from DN15 to DN100 per ISO 6708, and it operates within a pressure range of 1.0 to 1.6 MPa, and a temperature range of -20°C to 200°C. Key parameters include flange face flatness of 0.05 mm per ISO 4759-1, bolt hole diameter tolerance of +0.3/0 mm per ISO 273, and surface roughness of Ra 3.2–6.3 μm on the sealing face per ISO 1302. The housing weight varies from 0.5 to 5.0 kg depending on size and material. It offers ingress protection ratings from IP54 to IP65 per IEC 60529, and corrosion resistance of at least 200 hours in salt spray testing per ASTM B117. These values are reference ranges for directory purposes; actual specifications must be confirmed with the legal manufacturer or supplier for the specific model and application. The flange housing ensures proper alignment and pressure resistance, maintaining a sealed chamber that holds the sight glass in position. It uses bolt holes or clamps to secure the assembly, with gaskets or seals between mating surfaces to prevent leakage. This component is essential for safe and reliable operation of sight glass assemblies in industrial machinery and equipment.

The flange housing creates a sealed chamber that holds the sight glass in position against the equipment opening. It uses bolt holes or clamps to secure the assembly, with gaskets or seals between mating surfaces to prevent leakage. The housing maintains proper alignment and pressure resistance while allowing light transmission through the sight glass. The sealing face is machined to a specified flatness and surface roughness to ensure uniform gasket compression and a reliable seal. The bolt hole diameter tolerance allows standard bolts to fit correctly, and the ingress protection rating indicates the level of protection against dust and water. The housing's material and design must withstand the operating pressure and temperature, and its corrosion resistance is verified through salt spray testing. Proper installation and maintenance are crucial to prevent leaks and ensure long-term performance.