Firstly, weld polygonal ring shells with polygonal cross-sections or polygonal sector shells with closed ends. After filling the interior with pressure medium, apply internal pressure. Under the action of internal pressure, the cross-section changes from a polygon to a circle, forming an a-shaped annular shell; Then, according to the customer's needs, the annular shell can be cut into 4 90 elbows, 6 60 elbows, or other specifications of elbows. Let's learn about the process of making carbon steel elbows together!The production of this carbon steel elbow has the following two advantages

1) When making carbon steel elbows, it is not necessary to use pipe blanks as raw materials. It can save the cost of pipe making equipment and molds, and obtain carbon steel elbows with large diameter and relatively thin thickness.

2) When making carbon steel elbows, the blank is a flat or expandable curved surface. Therefore, cutting is simple, easy to assemble and weld.

These two advantages can shorten the manufacturing cycle, thereby greatly reducing production costs. This process is suitable for manufacturing large bend pipes of various specifications with a ratio of bend diameter to bend inner diameter greater than 1.5. Currently, it is most suitable for manufacturing large carbon steel elbows. method.

After manufacturing carbon steel elbows, it does not mean that the work is over, but that the surface needs to be treated. The surface treatment of carbon steel elbows is as follows.

1 Caliber issue. At present, when carbon steel elbow manufacturers press seamless elbows for processing, there may be a slight error in the diameter. We cannot guarantee whether the caliber error is within the national benchmark range. Therefore, it is necessary to handle the diameter of carbon steel elbows to meet the standards and customer requirements.

2 Internal and external wounds and polishing. Processing seamless elbows may inadvertently leave scars. Therefore, in this case, it is necessary to level or repair the scratches on the carbon steel elbow. This can be done in a pipeline manufacturing factory. Regarding polishing treatment, welding can also be used for repair to ensure there are no issues.

3 Processing anti rust coatings. Anti rust coating should be a good anti rust coating with good performance and quality. The method of drawing is not to paint, soak the paint in a pool to ensure that everything is flat.

Carbon steel elbows are used in pipeline systems for industries such as petroleum, natural gas, chemical, hydropower, real estate, and boilers. The forming process of elbows is complex and requires welding according to different materials and applications, gradually forming under certain pressure.

The design and manufacturing of carbon steel elbows must consider the hardness of carbon steel elbows. Research has been conducted on how to improve the hardness of carbon steel elbows, and the results show that carbon steel elbows require a heat treatment process. Below are some knowledge about heat treatment of carbon steel elbows. Carbon steel elbows are heated to a certain temperature and kept warm for a period of time, then slowly cooled, which is called annealing. Hot press bending tube annealing is a heat treatment method that heats steel to a temperature that does not undergo phase transformation or partial phase transformation, and slowly cools it after insulation. The purpose of annealing is to eliminate structural defects, improve the structure to homogenize the composition, refine the grains, enhance the mechanical properties of hot embossing, and reduce residual stress.

The above introduction is about the process of making carbon steel elbows. If you need to know more, please feel free to contact us at any time!