News and Information
05
2022
-
09
Manhole flanges are a new‑type design that differs markedly from traditional high‑pressure flanges. While retaining the pressure‑bearing capacity of conventional high‑pressure flanges, they also address certain inherent issues associated with flanges. Let’s take a closer look below. Manhole flange Characteristics.
Manhole flange Features:
1. The manhole flange features a unique sealing design: the seal is achieved through the elastic deformation of the sealing lip on the sealing ring, resulting in a hard‑seal configuration. Furthermore, the interplay of the sleeve, retaining collar, and reinforcing ribs of the sealing ring creates a robust, rigid structure, ensuring that the joint’s strength far exceeds that of the pipe itself. Consequently, under pressure, the ribs and the sealing lip simultaneously contribute to both structural integrity and effective sealing—providing a self‑tightening seal while reinforcing the pipeline and significantly enhancing the overall strength of the connection.
2. Manhole flanges exhibit excellent joint integrity; in most applications, the manhole flange at the connection point can withstand tensile loads better than the pipe itself. Failure tests have demonstrated that even after the pipe fails under tensile loading, the flange remains undamaged and shows no leakage.
3. In terms of flexural resistance, Manhole flange It also boasts excellent performance: in our tests, a DN15‑size manhole flange welded to a pipeline remained leak‑free and its bolts did not loosen even after repeated cold bending.
4. Excellent impact resistance; compact and space‑saving dimensions; capable of withstanding impact forces that conventional high‑pressure flanges cannot endure; its unique metal‑to‑metal sealing design further enhances its impact‑resistance performance.
5. Manhole flanges exhibit excellent corrosion resistance, with material options tailored to specific corrosive substances.
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