During home decoration, industrial drainage or municipal maintenance, it is often encountered that the connection between PVC pipes and pipe fittings needs to be disassembled. If the method is inappropriate, it is easy to cause pipe rupture or deformation of pipe fittings, affecting their secondary use. This article will introduce several safe and effective methods for removing PVC pipe connections, helping you complete maintenance work without damaging the pipe fittings.
Understand the connection principle of PVC pipes
PVC pipes and pipe fittings are usually connected by PVC glue (solvent bonding) or threaded joints. Solvent adhesive connection forms an integrated structure of pipe and pipe fitting through chemical dissolution, with strong sealing performance, but it is difficult to remove. However, threaded connections or rubber ring sealed connections can be relatively easily unscrewed or pulled out.
Therefore, before disassembling, it is first necessary to determine the connection method of the pipe fittings to select the appropriate treatment method.
How to remove pvc pipe from fitting
Hot air disassembly method
For PVC pipes bonded with glue, a hot air gun or hair dryer can be used for heating.
Set the hot air gun at approximately 200℃ to evenly heat the connection points of the pipe fittings.
When the PVC material becomes soft, gently rotate the pipe with pliers.
Pull out the pipe slowly after it becomes loose.
This method can effectively soften the adhesive layer and reduce the cracks caused by violent disassembly. It should be noted that the heating time should not be too long to avoid overheating and deformation of the PVC.
Cutting and cleaning method
If the pipes are severely aged or too firmly bonded, the local cutting method can be adopted.
Use a pipe cutter or a fine-toothed saw to cut the PVC pipe at the interface.
Then, use a circular file or a special cleaning knife to gently scrape off the remaining PVC layer and glue along the inner wall of the pipe fitting.
After cleaning is completed, the pipe fittings can be reused for installing new PVC pipes.
Although this method requires certain operational skills, it can preserve the integrity of pipe fittings to the greatest extent and is suitable for high-value or difficult-to-replace components.
Using a PVC-Specific Demolition Agent
Currently, some solvent-based PVC demolding agents are available on the market, which can quickly soften old adhesive layers. Inject the demolding agent along the joint gap, wait 5-10 minutes, and then twist and pull it out. This significantly reduces the difficulty of operation. Ensure good ventilation and wear protective gloves when using this method.
Junrui Brand Professional Advice
As a professional manufacturer of PVC and HDPE Plastic pipe fitting, Junrui Polymer Materials not only provides high-quality PVC pipe fittings, drainage systems and supporting solutions, but also offers technical guidance for installation and maintenance to customers. Our products are widely used in residential water supply and drainage, municipal engineering, agricultural irrigation and industrial pipeline systems, and are renowned for their excellent sealing performance, corrosion resistance and high cost performance.
Summary
When dismantling PVC pipes and fittings, correct operating procedures and tool selection can effectively prevent damage: Hot air heating can soften the joints; Precision cutting can preserve the fittings; Solvent dismantling agents can assist in rapid separation.
Mastering these techniques will make your pipeline maintenance safer and more efficient. Choose Junrui to obtain high-quality PVC pipe fittings and professional after-sales technical support, making every installation and maintenance easier and more reliable.
