Operating temperature range:
High temperature performance: L360 steel pipe can maintain stable performance at a certain high temperature and can generally adapt to conventional ambient temperatures. However, for higher temperature applications, it is necessary to consider the changes in its mechanical properties when it is close to 300°C, and pay attention to the highest and lowest operating temperatures in the application.
Thermal cycle: Evaluate the frequency and amplitude of temperature fluctuations. Repeated changes in temperature will cause thermal stress in the steel pipe, affecting its fatigue life and thermal expansion characteristics, which may cause loosening of the connection or deformation of the steel pipe.
Creep resistance: For applications that are at high temperatures for a long time and are subject to certain pressures, it is necessary to examine the creep resistance of L360 steel pipe at this temperature to prevent pipeline failure caused by slow deformation of the material.
Corrosive environment:
Chemical composition: Analyze the specific chemicals, concentrations, and pH values that the pipeline will be exposed to in the conveying medium and the external environment. For example, if it is exposed to a medium with a large amount of sulfur compounds, its corrosive effect on the steel pipe should be considered.
The effect of temperature on corrosion: Consider whether the increase in temperature will accelerate the corrosion process, and whether high temperature will change the effectiveness of the passivation layer (if any) on the surface of the steel pipe, resulting in a decrease in corrosion resistance.
Localized corrosion: Evaluate the risk of pitting, crevice corrosion or stress corrosion cracking according to specific environmental conditions. For example, in a humid environment with chlorides, the possibility of pitting of L360 steel pipes will increase.
Mechanical stress requirements:
Internal pressure: Calculate the required wall thickness according to the maximum working pressure and safety factor specified in the relevant design specifications to ensure that the L360 steel pipe can safely withstand the pressure of the internal medium and prevent the pipe wall from rupture.
External loads: Consider any other stresses from the outside, such as wind loads acting on overhead pipelines, impact forces generated by seismic activities, or additional forces exerted on the pipeline by supporting structures to ensure that the steel pipe is not damaged under the combined stress.
Cyclic loads: If the application involves frequent pressure or temperature cycles, evaluate the fatigue resistance of the L360 steel pipe to avoid fatigue damage such as cracks caused by repeated stress.
Manufacturing and installation considerations:
Welding requirements: Evaluate the weldability of the L360 steel pipe to determine whether special welding procedures or post-weld heat treatment are required to obtain high-quality welded joints and ensure that the weld strength and sealing are equivalent to the steel pipe body.
Forming and bending: If complex shapes or bends are required in the piping system, consider the formability of the material to ensure that the steel pipe will not have defects such as cracks and wrinkles during processing.
