As an important building material, steel pipe is widely used in various fields. The wall thickness of the steel pipe is one of its important parameters, which is directly related to the strength, bearing capacity, and service life of the steel pipe. So, what are the specified values for the wall thickness of the steel pipe?
1. The specified value of steel pipe wall thickness in relevant standards and specifications is mainly based on relevant national standards and specifications, the most important of which is “Technical Specifications for Steel Pipe Engineering” (GB 50017-2017). This standard gives the corresponding wall thickness regulations for different types of steel pipes to ensure that the steel pipes can meet the safety performance requirements during use.
2. Classification of wall thickness According to the use and material characteristics of the steel pipe, the wall thickness can be divided into three types: regular wall thickness, thickened wall thickness, and extra thick wall thickness.
Conventional wall thickness: Conventional wall thickness steel pipe refers to the wall thickness that can meet the load and use requirements under normal use conditions. The common wall thickness specified value of this type of steel pipe is generally between 1.5mm and 4.5mm, and the specific value needs to be determined according to actual engineering requirements and standard specifications.
Thickened wall thickness: Thickened wall thickness steel pipes are used to carry greater pressure or be used in special environments, such as industrial pipelines, high-pressure vessels, etc. The wall thickness of this type of steel pipe is generally larger than the conventional wall thickness, and the specific value is generally between 4.5mm and 10mm.
Extra-thick wall thickness: Extra-thick wall steel pipes are used for special engineering requirements, such as offshore platforms, nuclear power plants, etc. The wall thickness of this type of steel pipe is generally greater than 10mm, and the specific value needs to be determined according to actual engineering requirements and design calculations.
3. The principle of wall thickness selection When selecting the wall thickness of the steel pipe, it needs to be determined according to the specific engineering requirements and the use environment. Generally speaking, the selection of wall thickness should follow the following principles:
Bearing capacity: The wall thickness of the steel pipe must be able to meet the load-bearing requirements, be able to withstand the working load and external force, and ensure the stability and safety of the structure.
Service life: Steel pipes with proper wall thickness can increase service life, reduce maintenance and replacement frequency, and reduce use costs.
Economy: Under the premise of satisfying safety and service life, choosing a reasonable wall thickness can reduce the amount of materials used and reduce costs.
Engineering requirements: The selection of steel pipe wall thickness should also consider the requirements of specific projects, such as the nature of the medium in the pipeline, fluid pressure, temperature changes, and other factors.
4. Determination of the specified value of the wall thickness of the steel pipe is generally obtained through experiments and calculations, and it is corrected in combination with engineering practice and experience. The range and allowable deviation of the steel pipe wall thickness are given in the national standards and specifications to ensure the quality and safety of the steel pipe. To sum up, the specified value of steel pipe wall thickness is determined according to national standards and specifications and is generally divided into three types: conventional wall thickness, thickened wall thickness, and extra thick wall thickness. When selecting the wall thickness of the steel pipe, factors such as bearing capacity, service life, economy, and specific engineering requirements need to be considered, and the requirements of relevant standards and specifications should be followed. Reasonable selection of wall thickness can ensure that the steel pipe meets the safety performance requirements during use while reducing costs and prolonging the service life.
Post time: Aug-08-2023