1. Different processes

Seamless pipe is made of steel billets or solid tube blanks through piercing, hot rolling or cold rolling. Welded pipe is formed by bending and welding steel plate or strip.

2. Different appearance

There is no joint on the surface of seamless steel pipe. Generally, there are welding seams on the surface of welded pipe.

3. Different wall thickness

Seamless steel pipe has low accuracy and relatively thick wall thickness. The steel pipe of welded pipe has high precision and the wall thickness is usually relatively thin.

4. Different raw materials

Seamless steel tubes use steel billets or solid tube blanks. Welded pipe is made of steel plate or strip.

5. Different performance

In terms of corrosion resistance, pressure resistance and high temperature resistance, seamless steel pipe will be better than welded pipe.

6. Different prices

Seamless steel pipe is more expensive than welded pipe because its production process is more complex and its cost is higher.

7. Different functions

The seamless steel pipe is generally used as the fluid transmission pipeline required to withstand high pressure, high temperature and other special environments. Welded pipe is usually used as low pressure fluid transmission pipeline