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After welding, the corrugated compensator should be tested for its shape and geometry

Time: 03-24 󰃯 698 times of reading 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: 1. When the nominal pipe diameter is less than 500mm, and the pressure is less than 500mm, when the pressure is less than 500mm, when the pressure is less than 500mm, the pressure is less than 5mm. The dimension tolerance of both sides of corrugated compensator and flatness is nominal

1. Ripple Compensator Dimension tolerance of parallelism on both sides: when the nominal pressure pipe diameter is not greater than 500mm, it is 5mm; when the nominal pressure pipe diameter is more than 500mm, it is 1 of the nominal pressure pipe diameter and no more than 10mm. Corrugated compensator The dimensional tolerance of both sides and flatness is 1% of the nominal pressure pipe diameter, and is not more than 3 mm. If the corrugated compensator is pre stretched before the original factory, the long and short dimensional tolerance of the original factory after pre drawing shall also meet the requirements. The length of the free state of the corrugated compensator and the length of the original factory after pre stretching shall be tested respectively.
2. The specifications and technical standards of the flange and end pipe of the corrugated compensator and the pipeline shall meet the corresponding specifications. When the end pipe is connected, the welding seam of 30 degrees + / - 2.5 degrees shall be opened on both sides of the branch pipe.
3. The circumferential weld between the bellows and the end pipe shall be welded by TIG or MIG. When the wall thickness of one side of bellows exceeds 2mm, arc welding can be used.
4. When the end pipe of corrugated compensator is thick steel plate, the diameter tolerance and roundness tolerance of external port number of end pipe shall meet relevant requirements.
The closed effect of pipeline compensator is relatively strict, and the operation time can be very good separated from other components, which is not easy to cause merging, and its working efficiency will also be improved. However, some problems must be avoided. For example, if the prestressed steel strand is placed at high temperature for a long time, it will cause rust. Therefore, in order to ensure the installation quality of the pipeline compensator, it is necessary to master all the problems and minimize them.
1. The length of each horizontal and vertical bending datum point of the pipeline compensator shall be calculated to ensure its accuracy.
2. Then, according to the project construction scheme, the cutting is carried out, and the required length is measured with a scale, and the color is marked with different colors, which is very easy to distinguish and is more conducive to installation.
3. Carry out fixed fixation for the parallel plane and vertical curve graph, only drag out a datum point of the parallel plane. After the fixed point is fixed, mark well. When marking, the horizontal and vertical datum points must be classified by different colors, which is convenient for comparison and installation.
4. After installing the pipeline compensator, pay attention to the position of each datum point, and make sure that it is accurate, which is conducive to the installation.
5. After the horizontal and vertical datum points are carried out, the data encryption shall be carried out for the building reinforcement and fixed. In order to deal with the performance of prestressed reinforcement, it is necessary to ensure the compactness of prestressed reinforcement hole grouting.