Marking example: Nominal diameter 80mm, nominal pressure 4.0MPa (25bar) of the convex butt welded steel pipe flange (with rice pipe)
Flange DN80-PN40 M (Series 2) GB / T9115.2-2000
Nominal diameter 100mm, nominal pressure 5.0MPa (25bar) of the sudden neck with neck welded steel pipe flange (with British tube)
Flange DN100-PN50 RF GB / T9116.1-2000
Flanges are a kind of disc-shaped parts, the most common in pipeline engineering, flanges are used in pairs.
In the pipeline project, the flange is mainly used for the connection of the pipeline. In the need to connect the pipeline, a variety of installation of a flange, low-pressure pipe can use the wire flange, 4 kg above the pressure of the use of welding flange. Between the plates with the sealing point, and then fastened with bolts. Different pressure of the flange has a different thickness and the use of different bolts. Pumps and valves, and pipe connections, these equipment and equipment, also made of phase The corresponding flange shape, also known as the flange connection.
The use of bolted connections at the same time in two planes is also known as "flanges", such as the connection of ventilation ducts, which may be referred to as "flanged parts." But this connection is only A local part of the device, such as the connection of the flange and the pump, it is not good to the pump called "flange parts." More small, such as valves, can be called "flange parts."