How Are Large Flanges Operated and Processed

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Home » News » How Are Large Flanges Operated and Processed

How Are Large Flanges Operated and Processed

author: Jeawin time: 2014-07-31 15:29 hits: 1379

As sealing and fastening fittings, large flanges have been widely used in large containers in aerospace, petroleum, chemical industry, etc. Under normal circumstances, large flanges always can be divided into several segments for processing.

In spite of taking no account of the processing ability of large flanges, it is impossible to process the wholistic large flanges due to its too big size and transportation. Thus, large flanges must be processed section by section. Under normal circumstances, big flanges always can be divided into several segments for processing. First of all, forge the semi-finished product into square billet, then bend coldly into arc segments, and conduct heat treatment. Secondly, make up a full circle from processing to the design of shapes and sizes in the erect car. Finally transport them to the construction site, then install and weld several arc segments into a complete flange and compound with pressure vessels.

For some larges which are connected to the end socket on some large-scale pressure vessels, the noumena of flanges should be processed completely and flanges also need to be welded together with the end socket.Flanges should be processed finely for the sealing surface on the large vertical lathe after being taken the above process technology of flanges.

Followed are four tips for large flanges processing:

1. It has great application value in practical engineering if we adopt the way of precise bending to complete the rough machining of large flanges. This process can remove off the process of large vertical lathe so as to shorten the processing cycle, greatly reducing the manufacturing cost. And flange diameters are not restricted by vertical lathe processing ability, thus it can be processed super-large diameter flanges.

2. The flange cross section will be dissymmetric if bending flanges precisely. In order to prevent it distort during the process of bending, it is necessary to process to bend two flanges section in pairs.

3. It is necessary to adopt reasonable welding process measures to control the welding deformation during the process of installing and welding flanges.

4. Flanges can be gained higher machining precision if being adopted multi-functional machine tool on site. Machine tool can be processed precisely not only by milling but also by grinding, honing, polishing and other finishing technology.

How Are Large Flanges Operated and Processed

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