1, Different processing technology:
Seamless pipe is made of high-quality carbon steel or alloy steel. Seamless pipe processing technology is divided into two kinds of cold drawn and hot rolled, while the seam is generally welded.
2, Different uses:
Seamless pipe is mainly used for transporting fluid pipes or structural parts, mainly for the mechanical industry, while the seam steel pipe is mainly used in the construction industry, such as water, gas, compressed air and other low pressure fluid. However, the pressure pipes are used seamless steel pipe.
3, Different prices:
Because the production process of seamless steel pipe is more complicated, the price is more expensive than that of seamed steel pipe, while the seamed steel pipe is mainly made of secondary welded steel plate (steel strip), the price is cheap, the use is also relatively wide.
4, To withstand different pressures
The seam pipe is generally able to withstand the maximum pressure of 20 kg, which is the safest use. It is generally used for water, gas, compressed air and other low-pressure fluids; seamless pipe can withstand ultra-high pressure, of course, its wall thickness will increase, which need to be designed according to the pressure requirements. It is generally used for high pressure tubing, boiler tubes and other high temperature and pressure equipment. There are also structural seamless pipes, which look at the design requirements.
5, Heat treatment changes
At present, there are also some pipes with seamless steel pipe seams that anneal the weld seam and eliminate the residual stress of the weld seam, making the weld seam equal to the base metal. The bearing pressure range is basically equivalent to that of the seamless pipe. Also consider using. Of course, there are also some on the market using seamless steel pipe with drawn steel pipe after overall heating or drawing with core head rolling, which is mainly dominated by small sizes. Such pipes are only in the shape of seamless pipe, and its essence is not very it is good.
