Skin replacement of non-metallic expansion joints is a professional and meticulous job designed to restore the performance of the expansion joints and extend their service life. The following are the main steps and requirements of the technical specification for non-metallic expansion joint skin replacement summarized based on the available information:
Preparation
Confirm size and parameters: Check and confirm that the outer diameter size, skin width, technical parameters and installation position of the non-metallic expansion joint meet the construction requirements.
Inspection materials: Check whether the skin, pressure plate (if the original pressure plate can be reused, its quality should be confirmed), bolt assemblies, etc. that need to be replaced meet the construction requirements.
Safety measures: Clean up the surrounding flammable items, prepare fire extinguishing tools, and prepare fire and electricity prevention equipment.
Removal of old skin
Loosen bolt assembly: Use a wrench or other device to loosen the bolt assembly that holds the skin.
Removing platen and old skin: Carefully remove the platen and the old skin, store them in designated locations respectively, and mark the platen that can be reused for subsequent installation.
Install new skin
Clean Surface: Remove any residue or dirt from the expansion joint frame.
Placing a new skin: The new skin should be placed flat on the flange surface of the non-metallic expansion joint frame, take care to prevent wrinkles and ensure that the skin is tensioned.
Install strips and bolts: Use a bead and bolt assembly to secure the skin to the expansion joint frame, ensuring that the bead holds the skin firmly tight.
Interface handling: For horizontally mounted expansion joints, the upper interface at the outer skin interface should press down the interface to prevent water seepage.
Special Requirements
Thermal insulation cotton treatment: For the expansion joint of the original thermal insulation cotton, if the thermal insulation cotton can be reused, it should be stored separately; Check deflectors, counter flanges and metal frames for deformation or damage, and correct or replace if necessary.
Frame inspection: Ensure the quality of the non-metallic compensator frame to withstand the installation of a new skin.
Considerations
Throughout the entire process, all operations should be carried out in accordance with safety production procedures.
When replacing the skin, ensure that all fasteners are properly installed and adequately tightened to avoid leaks or failures in future operations.
Site cleanup before and after construction to keep the work area safe and tidy.
Follow-up maintenance
Once the replacement is complete, carry out appropriate Check the skin tightness and the function of the expansion joint.
The above steps and requirements should be adjusted according to the specific non-metallic expansion joint model and the manufacturer's recommendations. Always consult the relevant technical manual or contact the manufacturer for the most accurate operation guide before performing the replacement operation.