What you need to know about the application of stainless steel flanges

Flanges belong to a type of disc-shaped parts and are used in pairs. The surface brightness of the stainless steel flange is close to that of a mirror, and it feels hard and cold to the touch. It is a connecting part that uses bolts to connect and seal the periphery of two planes at the same time. It is mostly used in pipeline engineering, and its main function is to connect pipelines.
Low-pressure pipelines can use wire flanges, and welding flanges can be used if the pressure is higher than 4 kg. Add a sealing point between the two flanges and tighten them with bolts. Flanges of different pressures will use different thicknesses and different bolts. When water pumps and valves are connected to pipelines, parts of such equipment will also be made into corresponding flange shapes, which can also be called flange connections.
Usually the flange has three main functions. The first is to connect the pipeline and ensure that the pipeline remains sealed; the second is to facilitate the replacement of a certain section of pipeline; the third is to facilitate the disassembly and inspection of the pipeline at any time.
What should we pay attention to when installing stainless steel flange gate valve? The first is to check the valve cavity and sealing surface before installation to ensure that there is no dirt or sand attached; the second is to check the bolts at each connection to ensure they are tightened evenly; the third is to check the packing parts to ensure they are tight. , not only to ensure the sealing of the packing, but also to ensure that the gate can be opened flexibly; fourth, the user needs to check the valve model, connection size and pay attention to the medium flow direction before installing the valve to ensure that it is consistent with the valve requirements; fifth The first is that when installing the valve, the user must reserve the necessary space for the valve drive; the sixth is that the wiring of the driving device must be carried out according to the circuit diagram; the last is that the stainless steel flange gate valve must be maintained regularly and cannot be collided or squeezed at will. pressure to avoid affecting the seal.
In order to ensure that it can fully play its role and value in production and use, stainless steel flanges need to undergo ultrasonic flaw detection before use. Steel plates cannot be directly machined into stainless steel flange rings with necks. Butt welds should use full penetration welds. ; The butt welds of the rings should undergo post-weld heat treatment. There is no delamination defect; it should be cut into strips along the rolling direction of the steel, bent and butt welded into a ring, and the surface of the steel should form the cylinder of the ring. And 100% radiographic or ultrasonic flaw detection is carried out, and radiographic flaw detection meets the requirements of JB4730II level, and ultrasonic flaw detection meets the requirements of JB4730I level. Technical parameters must be strictly controlled when producing and welding stainless steel flanges.