Titanium flange type or construction type!
Flange types or structural types are mainly classified according to the connection mode of flange and pipe, which can be divided into: integral flange, threaded flange with neck, butt welding flange, slip on welding flange with neck, socket welding flange with neck, plate type slip on welding flange, A-type slip on flange with butt welding ring, B-type slip on flange with butt welding ring, slip on flange with flat welding ring, flange with pipe end flanging plate (A-type) Flanged short section plate loose flange (Type B) and flange cover (also called blind flange), etc.
Integral flanges are mainly used for flanges at the inlet and outlet of pumps, valves and other mechanical equipment, and are specially used to connect with flanges at pipes. These inlet and outlet flanges are usually integrated with the shell of mechanical equipment as a part of the equipment. Flanges are usually cast together with the shell of the equipment, and a few are cast (such as end flanges on forged steel valves).
At the threaded flange, the inner hole of the flange is processed into pipe thread and connected with the threaded pipe. It is a non welding flange. Compared with welded flanges, threaded flanges are easy to install and maintain, and can be used on some pipelines that are not allowed to be welded on site. The alloy steel flange has sufficient strength, but it is not easy to weld, or the welding performance is poor, so the threaded flange can also be selected. However, when the pipe temperature changes rapidly or the temperature is higher than 260 ℃ or lower than - 45 ℃, it is recommended not to use threaded flanges to avoid leakage.
Butt welding flange is also called high neck flange. It is different from other flanges in that there is a long and inclined high neck from the flange to the pipe welding point to the flange plate. The wall thickness of this high neck gradually transits to the pipe wall thickness along the height direction, improving the stress discontinuity, thus increasing the flange strength. Butt welding flange is mainly used in severe working conditions. For example, when the stress at the flange is large or the stress changes repeatedly due to the thermal expansion of the pipeline or other loads; Pipeline with large fluctuation of pressure and temperature or pipeline applied under high temperature, high pressure and low temperature conditions.
Flat welding titanium flange is also called lap welding flange. The connection between the flat welding flange and the pipe is to insert the pipe into the inner hole of the flange to an appropriate position first, and then weld it. The advantage of the flat welding flange is that it is easy to align during welding and assembly, and the price is cheap, so it is widely used.
