Production process and precautions of boiler tubes

As an important industrial equipment accessory, boiler tubes have strict requirements and precautions during production and use. This article will introduce in detail the production process of boiler tubes and the matters that need to be paid attention to in the production process.

Production process of boiler tubes:

The production of boiler tubes mainly goes through the following steps: material selection, forming, welding, heat treatment, testing and surface treatment.

1. Material selection

The selection of materials for boiler tubes is the first step in production and a very critical step. High-quality raw materials can ensure the quality and performance of boiler tubes. Usually, boiler tubes are made of seamless pipes or welded pipes, mostly made of carbon steel, alloy steel, etc. When selecting materials, factors such as the working pressure, temperature, and medium of the boiler need to be considered to ensure that the selected materials can meet the use requirements.

2. Forming
Forming is the second step in the production of boiler tubes. The main ways to form seamless boiler tubes are hot rolling, cold drawing, extrusion, etc. Among them, hot rolling is the most commonly used forming method. It heats the steel pipe to a certain temperature and then uses a rolling mill to roll it to make the steel pipe reach the required shape and size.

3. Welding
For welded steel pipes, welding is an important link in the production process. The quality of welding directly affects the use effect and safety of boiler tubes. Common welding methods include manual arc welding, submerged arc welding, TIG welding, etc. In the welding process, it is necessary to select appropriate welding materials and welding processes to ensure the quality of the weld.

4. Heat treatment

Heat treatment is an important link in the production process of boiler tubes. Through heat treatment, the residual stress inside the steel pipe can be eliminated and the mechanical properties and corrosion resistance of the steel pipe can be improved. Common heat treatment methods include normalizing, annealing, quenching, etc.

5. Trimming and adjustment

Trim and adjust the welded boiler tubes to improve their appearance quality and dimensional accuracy. Common processing methods include trimming, grinding, polishing, etc.

6. Inspection and quality control
Testing is a key link to ensure the quality of boiler tubes. During the production process, the steel pipe needs to be strictly tested, including appearance inspection, size inspection, mechanical property inspection, metallographic structure inspection, etc. Only steel pipes that pass the inspection can be shipped.

7. Surface treatment

Surface treatment is the last step in the production of boiler tubes. Through surface treatment, impurities such as oil and rust on the surface of the steel pipe can be removed to improve the corrosion resistance and service life of the steel pipe. Common surface treatment methods include sandblasting, pickling, passivation, etc.

8. Packaging and transportation

Pack the produced boiler tubes to prevent damage during transportation. Common packaging methods include wooden box packaging, woven bag packaging, etc.

Things to note in the boiler tube production project:

1. Strictly control the quality of raw materials
The quality of raw materials directly affects the quality and performance of boiler tubes. Therefore, during the production process, it is necessary to strictly control the quality of raw materials to ensure that the selected materials meet the relevant standards and requirements.

2. Reasonable selection of forming and welding processes
Forming and welding are key links in the production process of boiler tubes. During the production process, it is necessary to reasonably select forming and welding processes based on factors such as the material, specifications and use requirements of the steel pipe to ensure the quality and performance of the steel pipe.

3. Strictly control heat treatment temperature and time
Heat treatment is an important link in the production process of boiler tubes. During the heat treatment process, it is necessary to strictly control the temperature and time to ensure that the residual stress inside the steel pipe is eliminated and the mechanical properties and corrosion resistance of the steel pipe are improved.

4. Strengthen quality inspection and control
Quality inspection and control are key links to ensure the quality of boiler tubes. During the production process, it is necessary to strengthen quality inspection and control to ensure that the various indicators of the steel pipe meet the relevant standards and requirements. At the same time, it is also necessary to establish a complete quality management system to strictly monitor and manage each link in the production process.

5. Pay attention to production safety and environmental protection
During the production process, it is necessary to strictly abide by the relevant regulations and requirements of production safety and environmental protection to ensure the safety and environmental protection of the production process. At the same time, it is also necessary to strengthen the safety education and training of employees and improve their safety awareness and skill level.

In short, there are many things to pay attention to in the production process of boiler tubes. Only by strictly controlling the quality of raw materials, reasonably selecting the forming and welding process, strictly controlling the heat treatment temperature and time, strengthening quality inspection and control, and paying attention to production safety and environmental protection, can the quality and performance of boiler tubes be ensured and the normal operation and safe use of equipment be guaranteed.

Read more: Suggestions for selecting boiler tube materials or ASTM standard for low and medium pressure carbon steel boiler tubes