1. Pressure test of insulation joint and pipeline instrument.

2. The central wheelbase of the joint should be installed on a straight line with the central wheelbase of the pipeline, and the two centers

The wheelbase shall not be greater than 0.2mm when installed.

3. When the insulation joint is installed on the ground, it should be installed on the straight pipe section 20 meters away from the elbow and a support should be provided.

4. The insulation joint can be installed on the underground straight pipe section.

5. After the insulation flange is connected with the pipeline, do not lift the pipeline within 5 meters of the connector.

6. After the insulation joint is connected with the pipeline, the surface temperature of the insulation joint should not be higher than 120℃ during the repair and anti-corrosion work as required.

7. Avoid burying the installation in a place where there is perennial water. Installation requirements: 1. The insulation joint shall be installed within 50 meters to avoid a dead welding hole.