In this article, Baowu will show you why seamless steel pipes are called seamless.

Seamless steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same, and is an economical section steel.

However, the seamlessness of seamless steel pipes means that the pipe production is made of steel ingots or solid pipe blanks through perforation to make capillaries, and then hot-rolled, cold-rolled or cold-drawn, and the inner wall of the pipe has no joint gap.

Welded steel pipe refers to a steel pipe with a seam on the surface, which is formed by bending and deforming a steel strip or steel plate into a circular, square or other shape and then welded, and the inner wall of the pipe has a secondary welded seam.

In short, seamless is relative to welded steel pipes, because welded steel pipes are made of butt-welded steel strips, and seamless steel pipes are made of whole round steel hollows without welds.

Seamless steel pipes are widely used. for example:

General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipelines or structural parts for conveying fluids.

Special purpose seamless pipes include seamless pipes for boilers, seamless pipes for chemical power, seamless pipes for geological use and seamless pipes for petroleum. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames and steel scaffolding used in construction. The use of steel pipes to make ring parts can improve material utilization, simplify manufacturing processes, save materials and process Man-hours have been widely used to manufacture steel pipes.

The above are the reasons why seamless steel pipes are called seamless, and some of the main uses.

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