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What is carbon steel pipe?

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What is the difference between carbon steel pipe and seamless steel pipe?

What is the difference between carbon steel pipe and seamless steel pipe

1. Carbon steel pipe: It is made of steel ingot or solid round steel through perforation, and then made of hot rolled, cold rolled or cold drawn.

2. seamless steel pipe: made of a whole piece of metal, no joints on the surface of the steel pipe.

    1. carbon steel pipe: carbon steel pipe is divided into hot rolled and cold rolled (drawn) steel pipe two categories.

     Hot rolled carbon steel pipe is divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipes.

     2. seamless steel pipe: according to the production method, seamless pipe is divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion pipe, pipe jacking and so on.

     According to the section shape, the seamless steel pipe is divided into two kinds of round and shaped, shaped pipe has square, oval, triangle, hexagonal, melon seed, star, fin tube and many complex shapes.

    The maximum diameter is 650mm and the minimum diameter is 0.3mm.

3. Different applications

    1. carbon steel pipe: carbon steel pipe in China's steel pipe industry has an important position.

     2. seamless steel pipe: seamless steel pipe is mainly used for petroleum geological drilling pipe, petrochemical cracking pipe, boiler furnace pipe, bearing pipe and automobile, tractor, aviation high-precision structural steel pipe.

The use of seamless steel pipe to manufacture ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sleeves, etc., widely used steel pipe to manufacture.

Steel pipe or a variety of conventional weapons indispensable material, pipe, barrel, etc., to be manufactured by steel pipe.

Steel pipes can be divided into round pipes and special-shaped pipes according to the different shapes of the cross-sectional area.

Since the circle area is the largest when the circumference is equal, more fluid can be transported with a circular tube.

In addition, when the annular section is subjected to internal or external radial pressure, the force is more uniform, so the vast majority of steel pipes are round pipes.

However, the round pipe also has certain limitations, such as under the condition of plane bending, the round pipe is not as strong as the square and rectangular pipe bending strength, and some agricultural machinery skeletons, steel and wood furniture are commonly used square and rectangular pipes.

According to the appearance shape, carbon steel pipe; It should be called welded steel pipe, also known as the welded pipe, the material is ordinary carbon steel, the whole pipe has a joint longitudinally, which is heated by the strip steel and drawn once and is called the welded pipe.

Carbon steel coil tube; It is made of ordinary carbon steel plate and connected by a section to form a suitable low temperature and low pressure meson, which is called carbon steel plate coil tube.

Mainly used in cylinder production, billboards, engineering columns, large shaft processing and other industries.

Generally, the wall thickness of sheet steel pipe is between 6-20mm, and the thickest processing is between 20-35mm by cold rolling method.

Steel coil coil spiral tube manufacturing process: raw materials namely strip steel coil, welding wire, flux.

They must pass strict physical and chemical inspection before they are put into operation.

Single wire or double wire submerged arc welding is used for butt butt of strip steel. Active submerged arc welding is used for repair welding after rolling into steel pipe.

Before forming, the strip is levelled, trimmed, planed, transported and treated with curved edges.

The electric contact pressure gauge is used to control the pressure of the cylinder on both sides of the conveyor to ensure the smooth transportation of the strip steel.

Choose external control or internal control roll molding.

The weld gap control equipment is selected to ensure that the weld gap meets the welding requirements, and the pipe diameter, the amount of wrong side and the weld gap are strictly controlled.

Lincoln welding machine is used for both internal and external welding, and single wire or double wire submerged arc welding is carried out to achieve stable welding quality.

The tube where the strip butt weld and the T-joint intersecting the spiral weld are located is all viewed by X-ray television or film.

Each steel pipe is tested by hydrostatic pressure and radial seal is selected for pressure.

The test pressure and time are strictly controlled by steel pipe water pressure microcomputer and testing equipment.

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