The butt welding ring loose flange is a movable flange, which is generally matched with water supply and drainage accessories. When the manufacturer leaves the factory, there is a flange at both ends of the expansion joint, which is directly connected with the pipeline and equipment in the project with bolts.
effect:
The purpose of using butt welding ring loose flange is to save materials. Its structure is divided into two parts, one end of the pipe is connected with the pipe, and the other end is made into butt welding ring. The flange plate is made of low-grade material, while the pipe part is made of the same material as the pipe, so as to save materials.
advantage:
Cost savings. When the pipe material is special and expensive, the cost of welding the flange of the same material is high.
It is not easy to weld or process, or needs high strength. Such as plastic pipe, glass fiber reinforced plastic pipe and so on.
It is convenient for construction. For example, it is not easy to align the flange bolt holes during connection, or prevent the flange bolt holes from changing in the future.
Disadvantages:
Low pressure.
Low strength at the welding ring (especially when the thickness is less than 3mm)
In actual use:
This kind of flange can be rotated. It is easy to align bolt holes. It is easy to install on large diameter pipe. Loose flange can also be used where the pipe needs to be disassembled frequently for cleaning or inspection, or where it is necessary to rotate the flange without rotating the pipe when aligning the flange bolt holes.
There is a loose flange flanging general use of stainless steel, flange carbon steel, this can save money.
Meaning of code name
PJ and Se are the form codes of butt welding ring loose flange. PJ stands for butt welding ring loose flange; se represents a structural form of butt welding ring loose sleeve flange, which is different from PR type
