The main causes of water leakage in double flange force transmission joints include the following
      1. Sealing ring problem: Sealing ring pressure deviation or damage, aging, wear and loss of elasticity, or insufficient load will lead to the reduction of sealing effect, resulting in water leakage.
      2. Improper bolt fixing: The bolt is not tightened according to the specified torque, or loosened during transportation and installation, resulting in uneven force on the connection and causing leakage.
      3. Flange connection gap: There is a gap in the connection between the power transmission joint and the pipeline, or the connection is misaligned due to foundation settlement and other reasons, so that the sealing surface can not be completely fitted, and eventually leads to leakage.
      4. Material defects or damage: The material of the force transmission joint itself is defective, or it is damaged during construction and transportation, which may also lead to the degradation of sealing performance and then water leakage.
      5. Welding problems: Uneven welds, welding slag and dust inclusions during the welding process will also lead to water leakage.
      6. Installation problems: Failure to operate in accordance with the prescribed methods during the installation process, such as the middle bolt is not tightened, the rubber ring is not placed in place, etc., will also lead to water leakage.

Methods to solve the leakage of double flange force transmission joints include:
1. Check and clean the sealing surface: If there is dirt between the double flange power transmission joint and the sealing surface of the pipeline, you can use a lifting wrench to open the joint several times to flush away the dirt.
2. Replace the sealing ring: If the sealing ring is damaged or aged, the force transmission rod should be reassembled or the sealing rubber ring should be replaced.
3. Adjust the bolts: Make sure the bolts are tightened according to the specified torque to avoid loosening or uneven force.
4. Adjust the position of the flange: Ensure that the connection between the force transmission joint and the pipeline is tight, and there is no misalignment or gap.
5. Check the welding quality: If the welding problem is found, it is necessary to re-weld or repair the weld.