Stainless Steel 904L Lap Joint Flanges

Stainless Steel 904L Lap Joint Flanges are a two-component mechanical fastener assembly designed for use with a Lap Joint Stub End (or Van Stone) fitting. The flange itself slides over the pipe but is not welded to it; instead, it is held in place by the Stub End, which is butt-welded to the pipe and forms the gasket-sealing face . The key feature of this design is that the flange can freely rotate around the pipe, making bolt-hole alignment quick and effortless during assembly, which is a major advantage in large or complex piping systems. The material, SS 904L, is a super austenitic stainless steel known for its exceptional corrosion resistance, particularly in sulfuric acid and high-chloride environments. Since the flange is not exposed to the corrosive media, it can be made from a more economical material (though here we specify 904L for the entire assembly to ensure maximum resistance). The main application of SS 904L Lap Joint Flanges is in systems that require frequent dismantling for inspection or maintenance, such as chemical plants, pulp and paper processing, and water treatment facilities. Zeron Fasteners manufactures and supplies these specialized flanges for reliable, easy-to-handle piping connections.

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