Installation Manual for Dismantling Joints
Detailed manual for installing Klamflex Dismantling Joints. Covers installation, storage, troubleshooting, and important practices to avoid incorrect use.
Installation Manual for Dismantling Joints
Detailed manual for installing Klamflex Dismantling Joints. Covers installation, storage, troubleshooting, and important practices to avoid incorrect use.
Installation
- Position the spigot inside the flange adaptor until the front edge of the spigot is flush with the face of the flange adaptor.
- Position the dismantling joint between the two flanges. Withdraw the spigot until all free play is taken up, ensuring that the maximum flange-to-flange dimension is not exceeded.
- Assemble the flange connecting bolts.
- Insert the tie rods from one side in their appropriate positions. Thread the nuts and washers back onto the tie rod in sequence as they are installed.
- Tighten the tie rods and flange connecting bolts to the Klamflex recommended torque. Tighten the tie rods and bolts in pairs at diametrically opposite positions in a circular sequence. Tighten evenly, giving the nuts one or two turns at a time, to the prescribed torque of 65–80 Nm for sizes up to 300 NB and 80–120 Nm for sizes over 300 NB.
- Tighten the flange adaptor studs evenly. To ensure correct end-ring seating and gasket compression, tighten the studs in pairs at diametrically opposite positions in a circular sequence. Tighten evenly, giving the nuts one or two turns at a time, to the prescribed torque of 65–80 Nm for sizes up to 300 NB and 80–120 Nm for sizes over 300 NB.
- After pressure testing the line and before backfilling, Klamflex recommends checking the bolt torques again, as pipe movement may have occurred during the pressurisation and depressurisation process.
- If a gasket needs to be renewed and it is not possible to remove the Klamflex flange adaptor from the pipe, cut a length of the correct-profile gasket extrusion, available from Klamflex, approximately 5 mm longer than the pipe circumference. Wrap the gasket around the pipe and glue the ends together using quick-setting super glue (cyanoacrylate).
- Keep the joint at the top of the pipe and reassemble the coupling as normal.
- Do not forget to lubricate the gasket.
Storage
- Store in a cool, dark place and, where possible, at temperatures below 65°C.
- Store away from direct sunlight, electrical discharges and sparking electric motors.
- Always store sealing rings in an unstressed condition; never hang them, even for a short period.
Trouble Shooting
- Check if the fitting is correct for the application. If not, replace it with the correct fitting.
- Check that the gasket is uniformly compressed and the end ring is evenly tightened. If not, loosen and retighten the bolts as specified in the installation instructions. In some cases, the fitting may need to be strapped or restrained, as excessive movement could also dislodge the gasket.
- Check the bolt torques. If they are not within the specified torque range, retighten them to the installation specifications. Ensure that the pipeline is depressurised before retightening.
- Check that the rubber seal was installed correctly. If not, replace the rubber seal and follow the installation instructions.
- Check the setting gaps, if possible. If they are incorrect, reinstall the fitting using the correct setting gaps.
- Check whether lubrication was used on the rubber seal. If not, remove the fitting, apply lubricant to the outside of the rubber seal and reinstall it according to the installation instructions.
Don't
- Do not over-torque the bolts.
- Do not modify or alter any components of the flange adaptor.
- Do not exceed the design or test pressure.
- Do not overstretch the sealing rubbers or expose them to open flames.