What are steel pipe shrinkage and expansion?
The high frequency of pipeline usage in industries such as construction, engineering, and manufacturing is self-evident. One of the important technologies is pipeline diameter reduction. So, what is pipeline diameter reduction? Firstly, diameter change refers to the change in the cross-sectional area of the pipeline, including two forms of pipeline expansion and reduction. However, when conducting pipeline diameter reduction operations, we must know the specific pipeline specifications and models in order to carry out reasonable design and selection.
1、 Pipe diameter reduction specifications
The specification of pipeline diameter change actually refers to the change in pipeline diameter, usually represented by DN. For example, DN150 represents a pipe with an inner diameter of 150mm. When performing pipeline diameter reduction operations, it is necessary to know the DN values before and after the reduction and compare them in order to reasonably select the size of the reduction.
2、 Pipeline reducing model
The model of the pipeline refers to the material and diameter of the pipeline. Usually, commonly used pipeline materials include steel, aluminum, copper, etc. Among various materials, different pipe diameters are also included. For example, the diameters of LSAW pipelines include 416mm, 914mm, 1420mm, etc.
In addition, the model of the pipeline also needs to consider its wall thickness. Under the same diameter, the wall thickness of pipes made of different materials also varies. Therefore, when performing diameter reduction operations, it is also necessary to pay attention to whether the wall thickness of the pipes can meet the requirements of use.
3、 How to choose the appropriate model and specification
When performing pipeline diameter reduction operations, we need to select appropriate models and specifications based on specific usage needs. Firstly, when selecting materials, it is necessary to consider factors such as the purpose of the pipeline and environmental temperature. Secondly, when selecting the pipe diameter, factors such as fluid flow rate and velocity need to be considered.
Finally, it should be noted that pipeline diameter reduction must comply with national standards and relevant regulations to ensure its safety and reliability.