Under what circumstances are flanges required in pipeline fabrication?
Thread Content
When the pipeline is very long, are there standard requirements that mandate the use of flange connections?»
No. For the West-to-East Gas Pipeline, submarine pipelines – pipelines that are several kilometers or even dozens of kilometers long – how many flanges are needed? How many additional potential leakage points?
Segmented transportation, segmented connection, segmented control operations, segmented replacement, and convenient segmented maintenance.
In terms of the manufacturing process, for long-distance pipelines, even valves are welded together; in process equipment, flanges are required in many places – for example, detachable splices are needed at the equipment connections. Of course, flanges are all potential leakage points. Those with a diameter of less than 1.5 inches are usually welded, so there’s no need to worry about flanges. For larger diameters, flanges are added as needed; flanges, bolts, and gaskets all cost money.
It’s probably to facilitate maintenance or emergency handling, but adding flanges means there’s an additional point of leakage
1. Those requiring disassembly for maintenance； 2. Joints of different materials ； 3. Customized from special materials ；
Based on the production process and maintenance requirements, flanges can be considered to facilitate maintenance, replacement, and swapping. If there are no special requirements, it is not necessary to add one; after all, adding a flange means creating an additional point of leakage.