Is there any difference between seamless steel pipe and seamed steel pipe?

Seamless steel pipe can be used to transport fluids (such as natural gas, oil, water, etc.), some solid materials, etc. It is an economical steel material. Steel pipes are used to make grids, supports and mechanical supports of building structures. Using seamless steel pipes as building materials can reduce costs. Today, the editor collects and organizes the differences between seamless steel pipes and seamed steel pipes for your reference.
Why is seamless steel pipe called seamless steel pipe?

Seamless steel pipe Seamless pipe refers to the steel pipe produced by perforating a wool tube made of steel ingots or solid tube billets, and then made by hot rolling, cold rolling or cold drawing, and there is no gap in the pipe wall; welded steel pipe refers to the steel strip or steel plate bent into a round, square and other shapes and then welded into a secondary welding joint on the surface and inner wall of the steel pipe. In a word, seamless steel pipe is relative to welded steel pipe. Welded steel pipe is made of steel strips, and seamless steel pipe is made of hollowed-out round steel without welding.

1. Seamless steel pipes and seamed steel pipes have different processing techniques. Seamless steel pipes are made of high-quality carbon steel or alloy steel; the processing techniques of seamless steel pipes include cold drawing and hot rolling, and seam pipes are generally welded.
2. Seamless steel pipes and seamed steel pipes have different uses. Seamless steel pipes are mainly used for pipelines or structural components for conveying fluids, and are mainly used in the machinery industry; seamed steel pipes are mainly used for the transportation of fluids and gases in the construction industry, such as low-pressure fluids such as water, gas, and compressed air. Pressure pipes generally use seamless steel pipes.
3. Under normal circumstances, the use pressure of seamed steel pipes can be below 20 kilograms, which belongs to the safe use range, and is usually used for low-pressure fluids such as water, gas, and compressed air; seamless pipes can withstand ultra-high pressure, and of course the wall thickness will also increase, which requires design according to the required pressure, and is often used in high-temperature and high-pressure equipment such as high-pressure pipes and boiler pipes. According to the design requirements, there are also seamless pipes in the structure.
At present, there are several types of seamless steel pipes with seams, and the welds are annealed. The pressure range is basically equal to the pressure range of seamless steel pipes, which will be used. There are also some seam steel pipes on the market that are heated as a whole and then pulled or rolled into seamless steel pipes with smaller specifications. This type of steel pipe is only seamless in appearance, and its essence is not very ideal.
4. Different uses of seamless steel pipes and seam steel pipes. Seamless steel pipes are made by cold drawing and hot drawing, and are generally used in occasions where the medium pressure is equal to or greater than 1.6mpa. Welded steel pipes are made by high-frequency welding after steel plates are formed, and are suitable for medium pressures below 1.6mpa.