How is seamless steel pipe produced, and what is the progress of seamless steel pipe technology in C

With the continuous development of China, the continuous improvement of comprehensive national strength, and the continuous increase of the state's investment in science and technology, China is also in a leading position in the world in some fields. The steel industry is the foundation of modern manufacturing and is regarded as the cornerstone of the country's industrialization. Since the founding of the People's Republic of China, from the birth of the first seamless steel pipe to the world's largest steel-producing country, it can be seen that the success of China's seamless steel pipe technology can be seen.

Through independent innovation, the iron and steel industry of New China has created a number of firsts and completely realized China's leap to a large steel country. China's seamless steel pipe technical standards are strict, witnessing the ups and downs of New China's development from a poor and white country to a large steel country. <>

Seamless steel pipe is made of perforated whole round steel, and there is no weld on the surface, which is called seamless steel pipe. Seamless steel pipes are very versatile. Seamless steel pipes for general purpose 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 transporting fluids.

It has a hollow section and is widely used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round bar, steel pipe has the same bending and torsional strength, and is lighter in weight, which is an economical cross-section steel. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle racks and steel scaffolding used in building construction, etc., which can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing man-hours, and have been widely used in steel pipe manufacturing.

It can be seen that the importance of seamless steel pipes.

The production process of general seamless steel pipe can be divided into two types: cold drawing and hot rolling.

The main production process of hot-rolled seamless steel pipe (main inspection process):

Preparation and inspection of pipe blanks, heating of pipe blanks, perforation, rolling of pipes, reheating of steel pipes, calibration (reduction), heat treatment, straightening of finished pipes, finishing inspection, inspection (non-destructive, physicochemical, and bench inspection) Warehousing.

The main production process of cold-rolled (drawn) seamless steel pipe:

Blank preparation, pickling and lubrication, cold rolling (drawing), heat treatment, straightening, finishing, inspection.

China's seamless steel pipe technology has made a great breakthrough development, and this seamless steel pipe is mass-produced through a high-tech means.

When the seamless steel pipe is produced, the whole round steel is made by punching a hole in the middle of it, and then it is produced. This technology has made great progress, and it is also in a relatively leading position, and these seamless steel pipes have been put into a lot of work.

Liaocheng Kuanda steel pipe****.

At present, it has reached the world's advanced level and has been put into specific applications.

Production process of large-diameter alloy seamless steel pipe. It includes the following steps: step one, material preparation; Step two, tube blank heating and oblique rolling perforation; Step three, capillary trimming; Step 4, thermal expansion deformation sizing; Step 5, heat treatment; Step six, straightening; Step 7, internal grinding; Step eight, deviation correction; Step 9, external grinding; Step 10, flaw detection; Step 11, then finishing, final inspection and packaging.

The present invention can not only produce high-grade alloy seamless steel pipe within the range of large group distance, but also the investment is relatively small, and the product quality is high, the production efficiency is higher, and the production cost is lower.

The main production process of seamless steel pipes Tube blank and billet heating, tube blank perforation, steel pipe extension, steel pipe rolling, steel pipe sizing and reducing, steel pipe cooling and finishing, or it can be said that the heating of steel billet, perforation, hot pickling, cold drawing, charcoal burning, cutting head, spraying, packaging, finished products.

The manufacturing method of seamless steel pipe, wherein: arranging a rolling mill base with a plurality of rolls, a plurality of mandrel type seamless tube rolling mills are continuously arranged in different rolling directions, after rolling the seamless steel pipe on such a manufacturing production line, the wall thickness in the circumferential direction of the rolled steel pipe is measured at multiple points, and according to the measurement result, at least the two end positions of each shaft of the roll on the final rolling base of the mandrel type seamless tube rolling mill are controlled separately, so that the uneven wall thickness reaches a minimum.

A seamless steel pipe is a long strip of steel with a hollow section and no joints around the perimeter. Steel pipes have a hollow cross-section, and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe is lighter in weight when the bending and torsional strength is the same, and it is an economic cross-section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle racks, and steel scaffolding used in building construction.

The manufacture of annular parts with steel pipes can improve the utilization rate of materials, simplify the manufacturing process, and save materials and processing man-hours, such as rolling bearing rings, jack sleeves, etc., which have been widely manufactured with steel pipes. Steel pipes are also indispensable materials for all kinds of conventional, gun barrels, gun barrels, etc. are made of steel pipes. Steel pipes can be divided into round pipes and special-shaped pipes according to the different cross-sectional area shapes.

Since the circular area is the largest under the condition of equal circumference, more fluid can be conveyed with a circular tube. In addition, the toroidal section is more evenly stressed when subjected to internal or external radial pressure, so the vast majority of steel pipes are round pipes.

However, the round pipe also has certain limitations, such as under the condition of being bent by the plane, the round pipe is not as strong as the square and rectangular pipe, and some agricultural machinery skeletons, steel and wood furniture, etc. are commonly used in square and rectangular pipes. Depending on the application, there are also other cross-sectional shapes of special-shaped steel pipes.

A seamless steel pipe is a steel pipe without welds. The advantage is that it can withstand more pressure and has a wide range of uses. The disadvantage is that it is relatively high.

Compared with ordinary steel pipes, the cost is high and it is easy to rust!

Seamless steel pipes are suitable for distinguishing from seamed steel pipes.

Seams are welded, seamless, and rolled directly.

In terms of quality, the quality of the seams is better, and most of the problems are at the welding place, and it is easy to check the fault through the equipment. Seamless tube on the contrary.

But the advantage of seamless pipe is that it has high pressure bearing capacity and high strength.

Rolling, drawing, drawing and other processes are produced, and the advantage is pressure resistance.

Hot or cold drawn. The so-called cold is to use oil to lubricate the billet from the thick-walled pipe without heating, and use the steel ball sleeve to gradually elongate. Hot drawing is to simmer the billet pipe red to do such a job, and the general application of thick walls.

Seamless steel pipes are formed by cold drawing and hot rolling.

Overview of the two steel pipe processes:

1. Cold-drawn (rolled) seamless steel pipe: round tube blank heating, perforation, heading, annealing, pickling, oiling (copper plating), multi-pass cold drawing (cold rolling) billet tube, heat treatment, straightening, hydrostatic test (flaw detection), marking and warehousing.

2. Hot rolling (extruded seamless steel pipe): round tube billet heating perforation three-high oblique rolling, continuous rolling or extrusion pipe removal sizing (or reducing diameter) cooling billet pipe straightening hydrostatic test (or flaw detection) marking warehousing.

Heating - perforating machine perforation - rolling mill rolling - correction - cooling bed - straightening - saw head - baling.

Tube Blank Factory Round Tube Blank Heating Perforation Three-high oblique rolling, continuous rolling or extrusion Tube removal Sizing (or reducing diameter) Cooling Straightening Hydrostatic test (or flaw detection) Marking Warehousing, divided into cold rolling and hot rolling. Generally, there are many cold rolls because of high precision.

Yes, it is produced by seamless steel pipe factory.

A solid steel pipe (embryo tube) is heated and then perforated, and then through a series of processing methods, the hollow steel pipe without gaps on the pipe wall is called seamless steel pipe, and vice versa, it is called seamed steel pipe. There are many ways to classify seamless pipes. According to the classification of manufacturing process, there are:

Hot-rolled seamless pipes and cold-rolled seamless pipes. According to the use, there are seamless steel pipes for general structures, seamless steel pipes for conveying fluids, seamless steel pipes for medium and low pressure boilers, seamless steel pipes for high-pressure boilers, ,.. for high-pressure boilers

According to the material: high-quality carbon structural steel seamless steel pipe, low-alloy structural steel seamless steel pipe, alloy steel seamless steel pipe. Seamless steel pipes are widely used, they can be processed into mechanical parts, used to transport liquids or gases, used as drive bearings, and built rigid buildings.

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There are two types of seamless steel pipe processes: hot rolling and cold drawing;

1.Hot Rolling (Extruded Seamless Steel Pipe): Round Tube Blank Heating Perforation Three-high skew rolling, continuous rolling or extrusion Pipe removal Sizing (or reducing diameter) Cooling Straightening Hydrostatic test (or flaw detection) Marking Shandong Pilot Steel Pipe.

2.Cold-drawn (rolled) seamless steel pipe: round tube blank, heating, perforation, heading, annealing, pickling, oiling (copper plating), multi-pass cold drawing (cold rolling), billet tube, heat treatment, straightening, hydrostatic test (flaw detection), marking, warehousing (Shandong Pilot Steel Pipe).

The production process of seamless steel pipe, you can go to Huayang steel pipe to see if it is good. phone：。

Steel pipes can be divided into two categories according to the production method: seamless steel pipes and seamed steel pipes.

1. Seamless steel pipes are made of high-quality carbon steel or alloy steel, and are divided into hot-rolled and cold-rolled (drawn).

2. Welded steel pipe is made of coiled tubular steel plate welded by butt seam or spiral seam, and in terms of manufacturing method, it is divided into welded steel pipe for low-pressure fluid transportation, spiral seam welded steel pipe, direct coil welded steel pipe, welded pipe, etc. Seamless steel pipes can be used in various industries such as liquid pneumatic pipes and gas pipelines. Welded pipes can be used for water pipelines, gas pipelines, heating pipelines, electrical pipes, etc.

Welded steel pipes are divided into furnace welded pipes, electric welded (resistance welded) pipes and automatic arc welded pipes because of their different welding processes, and are divided into two kinds of longitudinal welded pipes and spiral welded pipes because of their different welding forms, and round welded pipes and special-shaped (square, flat, etc.) welded pipes because of their end shapes.

The billet is perforated to make seamless steel pipes, and the steel plates are welded pipes.

Good morning, dear<>

It is our honor that the new technology used for seamless steel pipes in your question is: the combined operation technology of rolling pipes, the main role of which is to improve the production efficiency and quality of pure sheds. This technology adopts a combined rolling mill, which consists of a plurality of rolling mills to form a production line, which does not need to be cut after each rolling section of the pipe like the traditional production method, but directly starts continuous rolling from the ingot to the length of the finished pipe, which greatly improves the production efficiency of the front.

The results achieved are:1High production efficiency:

The continuous production method does not require frequent cutting and rerolling, which reduces the downtime in the production process and improves the production efficiency. 2.The finished product has high dimensional accuracy

Due to the continuous production method, there is no need to cut and reroll the cement, and there are no gaps between the tubes, so the finished product has higher dimensional accuracy. 3.The material is uniform:

The combined operation technology of pipe rolling can make the deformation of the pipe uniform, eliminate the internal stress of the pipe, and make the material of the pipe more uniform. 4.Smooth surface:

With the combined operation technology of pipe rolling, the burr and oxide scale on the surface of the pipe are effectively controlled, the surface is smoother, and the quality of seamless steel pipe is improved. To sum up, seamless steel pipe is produced by the combined operation technology of rolling pipe, which can effectively improve the production efficiency and quality, and is a more advanced production technology. I hope my answers can help you and I wish you a happy <>