High-pressure gas fire suppression pipe fittings should be regularly inspected when connected with flanges.

Flanged connections are a commonly used method for joining gas high-pressure fire suppression piping components. This involves fixing two pipes, fittings, or equipment to separate flanges first, then placing a gasket between them and securing the flanges together with bolts. Some fitting and equipment products come with a built-in flange, which also falls under the category of flanged connections. Flanges are divided into threaded flanges and welded flanges, and they are a disc-shaped part that is widely used in pipeline engineering. Flanges are always used in pairs. However, regular inspections are also necessary when using flanges. Why is that?

Firstly, flanges should not be stored for long periods and should be inspected on a regular basis. Often, the exposed machining surfaces must be kept clean, free of dirt, and stored neatly in a well-ventilated and dry indoor area. It is strictly prohibited to stack them or store them outdoors.

Secondly, when using flanged ball valves, stop valves, and gate valves, they should only be operated fully open or fully closed, not for regulating flow to prevent erosion of the sealing surfaces and accelerate wear.

Francois is easily sourced, simple to manufacture, cost-effective, and widely used; however, it has poor rigidity, thus it is not suitable for piping systems in chemical processes with high demand and supply, flammability, explosiveness, and high vacuum requirements, as well as in highly hazardous situations. The sealing surface types include flat and raised surfaces.