Service life of welded pipe

Service life of welded pipe

Welded pipe

Welded steel pipe refers to a steel pipe with seams on the surface that is formed by bending steel strips or steel plates into round, square and other shapes and then welding them. 

Welded pipe is a pipe material commonly used to transport liquids, gases and solid particles. It has good pressure resistance, corrosion resistance, sealing and other characteristics, so it is widely used in various fields such as industry and construction. However, the service life of welded pipes is limited, which is roughly about 10-20 years. It can be evaluated based on welding process, environmental conditions and product quality.

Factors affecting the service life of welded pipes

1.Welding process: 

Welding process is one of the key factors affecting the service life of welded pipes. Different welding methods and processes have different effects on weld quality, strength and corrosion resistance. Therefore, choosing a suitable welding process can increase the service life of welded pipes.

2. Environmental conditions: 

Environmental conditions are also an important factor affecting the service life of welded pipes. The environment in which the welded pipe is located will affect its corrosion resistance. For example, salt spray in the marine environment will greatly reduce the life of the welded pipe, while a dry and pollution-free environment is conducive to the maintenance and maintenance of the welded pipe.

3. Product quality: 

The quality of the welded pipe itself will also affect its service life. If the quality of the product cannot meet the design requirements, the service life of the welded pipe will be shortened. Therefore, when purchasing welded pipes, you should choose high-quality products and pay attention to check whether their quality and materials meet the standards.

4. Material quality

The material quality of welded steel pipes is an important factor affecting their service life. If the material quality is poor, it may cause the welded steel pipe to be inclined, shrink, crack, etc., thereby shortening its service life.

5. Welding quality

Welding quality is also one of the factors affecting the service life of welded steel pipes. Poor welding quality may cause defects such as cracks and pores in the weld, thereby shortening its service life.

6. Pipeline use environment

The environment in which the welded steel pipe is used will also affect its service life. If the pipeline is used in a humid, corrosive environment, it may cause the steel pipe to corrode and rust, thereby shortening its service life.

7. Pipeline operation mode and cycle

Under different operation modes and cycles, the fatigue degree of steel pipes is different, which affects the service life. 

How to extend the service life of welded steel pipes? 

1. Control material quality

Ensuring material quality is one of the important measures to extend the service life of welded steel pipes. When selecting materials, materials with good quality, uniform materials and no obvious defects should be selected.

2. Strengthen pipeline anti-corrosion measures

After installation, the welded pipe should be treated with anti-corrosion and protective measures to prevent mechanical damage, such as applying anti-corrosion paint on the surface of the pipe and using anti-corrosion sleeves. 

3. Do a good job in welding quality control

For the weld part, check whether there are quality problems such as cracks and pores, and repair or replace them in time. To improve the welding quality, measures such as adopting professional welding technology, using high-quality electric welding materials, and equipping good electric welding equipment can be adopted. 

4. Pipeline use and maintenance

During the use of the pipeline, the welded pipe should be maintained regularly, such as cleaning off the attached corrosion and debris, timely detecting whether the pipeline has deformation, rust, wear and other problems, and taking corresponding measures to repair it to extend the service life. 

5. Pipeline use environment

Avoid the welded pipe from being affected by mechanical, chemical and other external factors or being subjected to excessive loads, pay attention to the use temperature and pressure of the pipeline, and do not exceed the designed working range of the pipeline. 

Conclusion

In summary, the service life of the welded pipe depends on factors such as welding process, environmental conditions, product quality, material quality, welding quality, use environment, operation mode and cycle. Therefore, when using welded pipes, we should choose appropriate products and welding processes, and strengthen the maintenance and maintenance of the pipeline in order to extend the service life of the pipeline and ensure the safety and stability of the project operation.