High-frequency straight seam steel pipe is based on the principle of electromagnetic induction and the skin effect, proximity effect and eddy current thermal effect of charges, thereby locally heating the steel at the edge of the weld to a molten state, and realizing butt welding through intergranular bonding extrusion, thereby achieving The purpose of seam welding.

The characteristics of submerged arc welded steel pipes are: the production process of straight seam welded steel pipes is simple, high production efficiency, low cost, and fast development speed. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. Welded pipes with larger diameters can use narrower billets.

Surface pitting of submerged arc welded steel pipe welds refers to weld defects where the surface of the weld is partially lower than the normal surface of the weld. It is a common weld surface defect in submerged arc welding.

In the construction of metal buildings, processing some metal building materials is a necessary process. Only through some welding operations can different metals be firmly connected together, so today I will take the welding operation of steel pipe column group as an example to teach you the relevant knowledge about the processing of metal building materials!

Straight seam steel pipes can be divided into high-frequency straight seam steel pipes and submerged arc welded straight seam steel pipes according to the production process. Let me explain to you the most common forming processes in submerged arc welding steel pipes and straight seam forming processes.

Usually, steel pipes are divided into two types: seamless steel pipes and welded steel pipes according to the production method. This time I will mainly introduce welded steel pipes.

Internal stress will be generated when the steel pipe structure is welded. When the welded rods are welded and cooled, uneven temperatures will affect the thermal stress. The internal stress generated by the metallographic structure in the metal structure is constrained by the structure, resulting in constrained stress. If the internal stress is not well controlled during the welding process, it will cause the shape and size of the welding rod to change.

A tube truss is a lattice structure formed by connecting round rods at both ends. Truss members make the truss structure economical in materials, light in weight, and easy to form into various shapes to adapt to different uses.

Compared with other steel piles, steel pipe piles have their own unique advantages in many aspects such as extension welding, single pile bearing capacity, bending stiffness, and penetration ability.

With the advancement and vigorous development of advanced technology, welded pipe technology has achieved large-scale leap-forward development in the past decade of this century, which directly drives the production efficiency of welded pipes and the quality of the welded pipes themselves. Great progress has been made.