Uses of the loop flange
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Where are loop flanges applicable?
Loose flanges are used to provide flexibility in assembly. For example, when connecting to a welded pipe, if both connection flanges are fixed, it is difficult to align the bolt holes. With loose flanges, even if the flanges of the pipes to be connected are not aligned, it is still possible to adjust the loose flanges to ensure smooth assembly.
Loose flanges are generally used for medium and low-pressure stainless steel pipe flanges, and their main purpose is to save stainless steel material and reduce costs. Additionally, the lengths at some device outlets or intermediate adjustment points are short
In engineering, welded joints are commonly referred to as live joints and dead joints. It is difficult to achieve 100% accuracy during the prefabrication process; therefore, the final joint is used for adjustment. The same principle applies to flanges – live flanges are used so that the bolt holes of the movable flange can be flexibly matched with those of the fixed flange
I agree with the comments above. There is another scenario: for example, in cases where mobile equipment needs to be disassembled and reassembled frequently (as is required for normal operation), using swivel flanges offers significant advantages, as it reduces the requirements for getting the equipment into place and makes the operation easier
When connecting to welded flanges such as plate-type flanges, it is possible to rotate the pipe to align with the bolt holes.
Since the medium has no contact with the flange itself, the flange can be made of a material different from that of the pipe; in other words, this allows for savings in the use of precious metals in certain situations