Main Flange Body

The Main Flange Body is a central structural component used in chemical reactor sealing gland assemblies. It provides the mounting interface and load-bearing framework that connects the sealing mechanism to the reactor vessel. This component ensures proper alignment of the gland assembly, distributes mechanical stresses evenly, and maintains the integrity of the sealing system under operational conditions. It is typically machined from stainless steel, with material grade 316L specified for corrosive media, and is available in nominal diameters from DN50 to DN300, with pressure ratings from PN10 to PN40 per ISO 7005-1. The operating temperature range is -20°C to 200°C, with a note that above 200°C a special gasket is required. Surface roughness of the flange face is specified as Ra 0.8–3.2 μm, while the sealing surface finish is Ra 0.4–1.6 μm per ISO 4287. Flatness tolerance is 0.05–0.10 mm per ISO 2768-mK, critical for uniform gasket compression. Bolt hole diameters range from 18 to 26 mm, with 4 to 12 bolt holes evenly spaced per ISO 7005-1. The weight ranges from 5 to 80 kg, affecting handling and support. All listed values are reference ranges that must be verified for the specific model and application. The component is designed to transfer clamping forces evenly across sealing surfaces, maintain geometric alignment, and withstand internal pressure and thermal expansion forces during reactor operation. It is essential to confirm model-specific parameters and applicable standards with the legal manufacturer or supplier before procurement.

The Main Flange Body functions by providing a rigid, precisely machined interface between the reactor vessel and the sealing gland components. It transfers clamping forces evenly across the sealing surfaces, maintains geometric alignment of the gland assembly, and withstands internal pressure and thermal expansion forces during reactor operation. The flange body is bolted to the reactor nozzle, and the sealing gland components are mounted on it. The flatness tolerance and surface finish are critical to ensure uniform gasket compression, preventing leaks. The material grade, such as 316L, provides corrosion resistance for chemical media. The design must accommodate the specified pressure rating and temperature range, with appropriate gasket selection for higher temperatures.