The main differences between seamless pipes and welded pipes include production technology, production capacity, price, etc. The specific differences are as follows:
1. Different processes: Seamless pipes are made by perforating steel billets or solid tube embryos through hot rolling or cold rolling. Welded pipe is made by bending and welding steel plates or strips.
2. Different appearance: There are no seams on the surface of seamless pipes. There are generally welding seams on the surface of welded pipes.
3. Different wall thicknesses: The precision of seamless pipes is low and the wall thickness is relatively thick. The steel pipe of welded pipe has high precision and the wall thickness is usually thin.
4. Different performance: Seamless pipes are better than welded pipes in terms of corrosion resistance, pressure bearing, high temperature resistance and other properties.
5. Different prices: Seamless pipes are more expensive than welded pipes because the production process of seamless steel pipes is more complex and their costs are higher.
Seamless pipe is a long strip of steel with a hollow section and no seams around it. Its main feature is seamless welding. It is made by hot rolling, cold rolling or cold drawing. Its advantages are high temperature resistance, good toughness, and durability. It is long and has few interfaces. It is generally used as a fluid pipeline that requires resistance to high pressure, high temperature and other special environments. The disadvantages are high price, easy corrosion and short service life.
Welded pipe refers to a steel pipe that is made by bending and deforming a steel strip or steel plate into a round, square, etc. shape and then welding it, with seams on the surface. The main feature is that there are seams. The blank used is a steel plate or steel strip. Its advantages are: It has strong corrosion resistance, high temperature resistance, long service life and is cheap. It is usually used as a low-pressure fluid transportation pipeline. The disadvantage is that it cannot weld thicker iron plates and cannot weld continuously, and the welding strength is low. It is difficult to weld workpieces with sealing and pressure requirements.
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