When there is a gap between the casing pipe and the pipe, the gap of the pipe needs to be cleaned first to ensure that the surface is clean and dry. You can use the water ball test to check whether there is dust or impurities and clean it. Then seal it, repair the end face, leave a 20mm deep groove at the casing pipe mouth at both ends of the wall, and fill it with waterproof paste or fireproof mud to ensure that the end face is smooth. The following are four common sealing methods:

Tape caulking method

Using tape to caulk is one of the simplest methods. When using it, you first need to clean the surface of the pipe and casing pipe, and clean all dust, grease and other dirt. Then, post the tape at the junction of the pipe and casing pipe to ensure that the tape is completely attached. This method is simple and easy, but it has poor durability and is not suitable for long-term use.

Foam caulking method

The foam caulking method uses foam to fill the gap, which can provide a better isolation effect. When in use, you need to spray the foam on the surface of the gap until the gap is fully filled. After the foam gels, the excess foam can be trimmed. This method is more durable than the tape caulking method, but it requires the use of a special foam filler.

Silicone caulking method

Silicone is a very elastic material that can be used to caulk. When using it, you need to fill the gap with silicone and fully compact it to ensure that the silicone fully fills the gap. The solidification time of silicone needs to be determined according to factors such as thickness and ambient temperature. Silicone has the characteristics of waterproof, corrosion-resistant, and UV-resistant, and is an ideal caulking material.

Sealant caulking method

Sealants are similar to silicone, both of which are a type of elastic material. When using it, like silicone, you need to fill the gap with sealants to ensure that it is fully filled. Unlike silicone, sealants can be used in environments exposed to water and in environments with higher temperatures. The price of sealants is relatively expensive compared to silicone, but it works better in special environments.

The above four methods are commonly used methods for clogging the gap between pipes and casing pipes. It is necessary to select the appropriate method according to the actual situation to ensure the safe operation of the pipeline system.