DN400 Stainless Steel Pipe Details

In the steel industry, stainless steel pipes are widely used in various fields such as petroleum, chemical industry, medical treatment, and food due to their corrosion resistance, high strength, and long life. As one of the specifications, DN400 stainless steel pipe is very popular in the market because of its moderate diameter and excellent performance.

1. Basic specifications of DN400 stainless steel pipe
The nominal diameter of DN400 stainless steel pipe is 400 mm, which is a standard parameter used to identify pipe sizes in piping systems. In actual applications, the outer diameter of DN400 stainless steel pipe may vary depending on the wall thickness of the steel pipe and the manufacturing process. Generally speaking, the outer diameter of DN400 stainless steel pipe is between 426 mm and 432 mm. In addition to the nominal diameter and outer diameter, the wall thickness of the stainless steel pipe is also an important specification parameter. The wall thickness of DN400 stainless steel pipe can be selected according to different usage scenarios and needs. Common wall thicknesses are 6 mm, 8 mm, 10 mm, etc. The thicker the wall thickness, the greater the pressure-bearing capacity of the pipe, but correspondingly, the weight and cost of the pipe will also increase.

2. Material of DN400 stainless steel pipe
The choice of stainless steel pipe material directly affects the performance and service life of the pipe. Commonly used materials for DN400 stainless steel pipes include 304, 304L, 316, 316L, etc. These stainless steel materials have good corrosion resistance and mechanical properties and can adapt to various harsh working environments. Among them, 304 stainless steel is the most commonly used material. It has excellent corrosion resistance, especially in general industrial environments. 316 stainless steel has better corrosion resistance, especially in environments containing chloride ions, and its corrosion resistance is better than 304 stainless steel. Therefore, when choosing DN400 stainless steel pipe, you need to choose the appropriate material based on the actual use environment and requirements.

3. Manufacturing process of DN400 stainless steel pipe
The manufacturing process of stainless steel pipes also has an important impact on the quality and performance of the pipes. There are two main manufacturing processes for DN400 stainless steel pipes: welding and seamless. Welded steel pipes are made by rolling stainless steel plates into tube shapes and then welding them. This process has low cost and high production efficiency, but there may be welding defects at the weld, which affects the overall performance of the pipeline. Therefore, when selecting welded steel pipes, you need to pay attention to their weld quality and testing standards. Seamless steel pipes are processed directly from stainless steel billets into tubular shapes through hot-rolling or cold-rolling processes without welds. Seamless steel pipes have higher strength and better-sealing properties and are suitable for occasions that require higher pipeline performance. However, the production cost of seamless steel pipes is high and the price is relatively expensive.

4. Application fields of DN400 stainless steel pipe
DN400 stainless steel pipe is widely used in various fields due to its larger diameter and excellent performance. In oil and natural gas transportation, DN400 stainless steel pipes can withstand high pressure and corrosive media to ensure safe transportation. In the chemical industry, DN400 stainless steel pipes are used to transport various chemical media, and their corrosion resistance can ensure that the media will not cause damage to the pipelines. In addition, in the medical, food, and other fields, DN400 stainless steel pipes are also widely used because of their hygienic and non-toxic characteristics.

5. The future development of DN400 stainless steel pipes
With the continuous advancement of science and technology and people's increasing requirements for environmental protection and energy conservation, DN400 stainless steel pipes will also face new challenges and opportunities in future development. On the one hand, the stainless steel pipe industry needs to continue to improve product quality and technical level to meet more stringent market demand and environmental protection standards. On the other hand, with the continuous emergence of new materials and new technologies, the stainless steel pipe industry also needs to actively explore new application fields and market space.

In general, DN400 stainless steel pipe, as an important steel product, is widely used in various fields. Through an in-depth understanding of its specifications, materials, manufacturing processes, and application fields, we can better select and use DN400 stainless steel pipes to provide strong support for the development of various industries.