Fluid pipes are pipes specially used for conveying media with fluid properties.Medium with fluid properties, in addition to liquid media such as water, oil, and solution, solid media such as cement, grain, and coal powder can also flow under certain conditions.The fluid tube can be made of steel, copper, titanium and other non-ferrous metals, or even plastic and other non-metallic materials.The fluid pipe must have a hollow cross-section, and it can also be square, triangular or any other shape.
For example, under flat bending conditions, round pipes are not as strong as square and rectangular pipes.
Among them, welded pipes are divided into high frequency straight seam welded pipes (ERW pipe), spiral welded pipes (SSAW pipe), submerged arc welded pipes (UOE/LSAW), etc.
With the development and progress of material science, forming technology, and unit equipment, welded pipes have been greatly developed.
Welded pipes have the advantages of better wall thickness uniformity, higher precision, less energy consumption, and higher production efficiency than seamless pipes.
Today, in the United States, More than 95% of developed countries in Japan and Europe have been replaced by welded pipes.When welded pipe is used as a fluid pipe, it has different requirements from ordinary steel pipe:1.