1. Before installation, carefully check whether the expansion joint meets the basic pipeline specifications. Whether the three arms of the telescopic device can be used to observe and arrange the support frame at a certain level to make it telescopic. The position, height-width ratio and inclination of the chair are consistent with the layout.
2. During installation, the expansion joint should be pretensioned, and the pretensioning amount is 1/2 thermal elongation. The stretching experiment method can use the telescopic device or hydraulic jack to drive the two arms of the telescopic device.
3. The pretensioned butt weld should be 2-2.5 meters away from the expansion joint fitness exercise point. Don't get too close to the telescopic device. Before drawing, check whether the cold drawn butt weld is consistent with the cold drawn value.
4. Horizontal installation should be consistent with the inclination of the pipeline; When placed directly, the higher part is equipped with an automatic exhaust valve and the lower part is equipped with a drain valve.
5. The first support frame on both sides of the expansion joint should be placed at a distance of 0.5- 1m from the bending point of the elbow. The support frame should be a fitness support frame.