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When pipe sizes exceed the load capacity of the workbench, you need large-diameter flanges. These flanges are forged from solid billets, with grain flow and pressure ratings identical to those of smaller flanges—except that the bolt-hole circle diameter is specified in meters rather than millimeters. Whether referred to as large-bore flanges, A-series necked weld-end flanges, or B-series blind flanges, their function remains consistent: to connect NPS 26 to 60 pipes without reducing the pressure rating.

The tube sheet flange is a critical pressure-bearing component used in pressure vessels such as heat exchangers, boilers, and condensers to secure the tube bundle and to isolate the shell-side and tube-side fluids. It typically consists of a precisely machined circular plate with numerous tube holes. The outer periphery of the flange is equipped with a standard flange sealing surface and bolt holes for connection to the vessel shell or other pipeline flanges.

In the industrial sector, the long-neck flange is a critical connection device widely used for joining pipelines, valves, pumps, and other equipment. Its distinctive advantages—such as high load-carrying capacity and excellent sealing performance—make it an indispensable component across numerous industrial applications. This article provides a detailed overview of the long-neck flange.

An anchor flange (AF) is a one-piece forged component that does not incorporate bolt holes. It is joined to two pipe sections by butt welding and then embedded in a concrete anchorage block, thereby converting axial thrust into soil pressure. No gaskets are required, nor is a specific bolting sequence necessary—only a robust anchor flange is needed to effectively prevent displacement of long-distance pipelines, subsea crossover pipelines, and bridge approach spans under temperature or pressure fluctuations.