What are the welding methods for thick-walled pipes? What are the specifications of thick-walled pipes?

For example, thick-walled pipelines, this material has a wide range of applications, such as industry, construction industry, machinery industry and so on. , and can be used with appropriate specifications. Many people don't know much about the welding method and specifications of thick-walled pipes. In view of these problems, we have a specific understanding of the relevant knowledge. There are many common industrial materials in the modern market, such as thick-walled pipes. This material has a wide range of applications, such as industry, construction industry, machinery industry and so on. You can choose the appropriate specifications to use. Many people don't know much about the welding method and specifications of thick-walled pipes. In view of these problems, we have a specific understanding of the relevant knowledge.

What are the welding methods for thick-walled pipes?

1. Welding method of thick-walled pipeline: 1. There should be no more than two longitudinal welds on the same pipe joint of the rolled pipe. 2. When the pipes are butt welded, the inner walls shall be flush. When the nominal diameter is greater than the nominal diameter, the back welding should be carried out in the pipe. In the process of pipe rolling, the surface damage of plate should be prevented.

Second, the diameter of thick-walled coil is generally above DN450. Large-diameter thick-walled coils sometimes have two welds. Why is this happening? Mainly raw material problems and equipment processing problems. The large-diameter welded pipe required by customers is generally not produced in the steel plate factory, and two plates need to be welded together, so this kind of weld appears. The main problem in manufacturing large-diameter thick-walled coils is welding. As long as it can pass the inspection, it can be delivered. The requirements related to delivery are more extensive than other products.

What are the specifications of thick-walled pipes?

The production technology of 1 thick wall seamless steel pipe can be divided into four basic ways: cold drawing, cold rolling, hot rolling and hot expanding. The materials of steel pipes are 10 #, 20 #, 35 # and 45 #, which are called ordinary steel pipes, and 16Mn between ordinary steel pipes and alloy steel pipes is called low alloy steel pipes.

2. Thick-walled pipes are divided into structural seamless steel pipes according to their uses; Seamless steel pipe for transportation; Seamless steel pipe for boiler; High pressure seamless steel pipe for boiler; High pressure seamless steel pipe for fertilizer equipment; Seamless steel pipe for geological brick finding; Seamless steel pipe for petroleum exploration; Seamless steel pipe for petroleum cracking; Marine seamless steel pipe; Cold-drawn and cold-rolled precision seamless steel pipes; All kinds of alloy tubes.

3. Thick-walled pipe is a popular pipe in the market. Because of its light weight, durability and convenient construction, its flexibility is more suitable for home decoration. Its main disadvantage is that when it is used as a hot water pipe, long-term thermal expansion and cold contraction will cause dislocation of the pipe wall and leakage. The inner and outer layers of aluminum-plastic pipes are made of special polyethylene materials, which are clean, non-toxic and smooth.

There are many brands and types of common thick-walled pipes in the market, which are also very popular materials in the market and can be purchased according to demand. The above is an introduction to the welding methods and specifications of thick-walled tubes, which I hope will be helpful for you to choose suitable thick-walled tubes. Different specifications of materials have different scope of application, and can be purchased as needed.