PVC pipes (polyvinyl chloride pipes) are widely used in construction, water supply and drainage, HVAC and other fields because of their lightness, corrosion resistance and low price. However, in actual use, many PVC pipes do not have threaded interfaces, which requires us to take other methods to connect two PVC pipes without threads. This article will introduce in detail How to connect two pvc pipes without threads.
Use special glue for PVC pipes
In the absence of threads, the most common and effective connection method is to use special glue for PVC pipes. This glue is an adhesive that can strongly connect two PVC pipes together to ensure the sealing and durability of the connection.
Steps:
1. Prepare tools and materials: You need special glue for PVC pipes, cleaning cloth, pipe cutting tools (such as pipe scissors) and a pipe connection accessory (such as elbows, straight-through, etc., select according to your needs).
2. Cut the pipe: First, use the pipe cutting tool to cut the two PVC pipes into the required length. Make sure the cut is flat when cutting to facilitate the application and bonding of glue.
3. Clean the pipe and accessories: Use a cleaning cloth or solvent to clean the end of the pipe and the socket of the connecting accessories to remove dust, grease and other debris on the pipe. A clean contact surface helps the glue to bond.
4. Apply glue: Apply the special glue for PVC pipes evenly on the socket part of the pipe and the socket part of the connecting accessories. Be careful not to apply the glue too thickly, but make sure to cover the entire connection area.
5. Insert the connecting accessories: Quickly dock the pipe and the connecting accessories, and rotate or press them hard to make them tightly combined. Keep the position for one or two seconds until the glue is initially cured.
6. Wait for curing: After the connection is completed, wait for the glue to fully cure according to the requirements on the glue manual. Generally, it takes about 24 hours for the glue to cure.
7. Check the connection: After the curing is completed, check whether the connection is stable and ensure that there is no leakage.
Advantages:
1. High strength, the connection is not easy to loosen.
2. Suitable for PVC pipes of various shapes and sizes.
3. No additional mechanical tools are required, simple and convenient.
Disadvantages:
1. Once bonding is completed, it is difficult to remove.
2. The curing time requires a certain amount of patience.
Use pipe clamps
For some situations that require temporary connection or easy disassembly, consider using pipe clamps. Pipe clamps connect two PVC pipes together through the design of a fastening ring, which is suitable for simple connections of straight pipes.
Steps:
1. Prepare tools and materials: You need clamps, gaskets, screwdrivers, pipe cutting tools, etc.
2. Cut the pipes and clean: As with the method of using glue, first cut the two pipes to the appropriate length with a pipe cutting tool, and clean the contact surface with a cleaning cloth.
3. Install gaskets: Install gaskets at both ends of the pipe at the connection to ensure that an effective seal can be formed during the connection to avoid water leakage.
4. Install the clamp: Install the clamp at the pipe connection and tighten the clamp with a screwdriver. The clamp needs to be close to the surface of the pipe, but be careful not to over-tighten it to avoid damaging the pipe.
5. Check the connection: After the connection is completed, you can gently pull the pipe to check whether the clamp is tight and whether there is any water leakage.
Advantages:
1. Easy to connect and easy to disassemble.
2. It can be used in occasions that require adjustment or disassembly.
3. Suitable for pipes of different sizes.
Disadvantages:
1. The connection strength is poorer than the glue method.
2. Not suitable for long-term high-pressure use.
Use hot melt connection
For some special PVC pipes, you may need to use hot melt connection technology. Hot melt connection is a method of connecting two PVC pipes together by heating, which is suitable for most standard PVC pipes.
Steps:
1. Prepare tools and materials: hot melt machine, hot melt connector, PVC pipe and accessories.
2. Heat the pipe: Insert one end of the PVC pipe and accessories into the hot melt machine and heat to the appropriate temperature. Usually, the hot melt machine will indicate the best temperature.
3. Connect the pipe: After heating, quickly insert the pipe and accessories together and maintain a certain pressure until the two are firmly bonded.
4. Cooling and curing: After the connection is completed, keep the pipe still and wait for cooling and curing. The cooling time is usually several minutes.
Advantages:
1. High connection strength, suitable for large pipe diameter and high pressure system.
2. Stable connection, not prone to water leakage.
Disadvantages:
1. Professional hot melt equipment is required, which is more expensive.
2. The operation requires certain technical requirements.
Use compression joints
Compression joints are a mechanical connection method suitable for occasions where disassembly or frequent position adjustment is required. It tightly connects the pipe and the joint part through mechanical pressure, and is suitable for the connection of two non-threaded PVC pipes.
Steps:
1. Prepare tools and materials: compression joints, gaskets, pipe cutting tools.
2. Cut and clean the pipe: First cut the pipe, make sure both ends are flat, and then clean the pipe surface.
3. Install gaskets and compression joints: Install the gasket on one side of the joint, then insert the pipe into the joint, and tighten the joint with appropriate tools.
4. Tighten the joint: Use tools such as wrenches to fix the joint to ensure that the joint is firmly sealed.
Advantages:
1. The connection is firm and suitable for high-pressure applications.
2. Easy to disassemble, suitable for maintenance and adjustment.
Disadvantages:
1. The cost is high.
2. Certain mechanical tools and operating skills are required.
When connecting two non-threaded PVC pipes, the most common method is to use PVC special glue, which is simple, fast, low-cost, and suitable for most household and industrial pipe installations. Pipe clamps and hot melt connections are suitable for different use scenarios, such as temporary connections or when high-strength connections are required. Regardless of which method is used, ensuring a firm connection and good sealing is the most important thing, which can avoid problems such as leaks.
