In the modern engineering field where material performance requirements are increasingly stringent, stainless steel pipes have become the core choice of many key projects due to their excellent corrosion resistance, high strength and hygienic properties. The following cases will show in detail the excellent performance of stainless steel pipes in actual projects.
Project Background
A large chemical park needs to build a new acid-base liquid transportation pipeline network system. The system needs to transport highly corrosive liquids such as sulfuric acid and sodium hydroxide with a concentration of up to 30% for a long time, and at the same time face the erosion of complex environments such as industrial dust and humid air. The project party has extremely high requirements for the corrosion resistance, sealing and service life of the pipeline materials. After multiple rounds of technical demonstration and material comparison, stainless steel pipes were finally selected as the core material of the pipeline system.
Stainless steel pipe selection and performance advantages
Model selection
The project uses 316L stainless steel pipe, which is an ultra-low carbon austenitic stainless steel. The addition of molybdenum makes it have extremely strong corrosion resistance, especially suitable for harsh media environments such as strong acids, alkalis, and salts.
Core features
Super corrosion resistance: 316L stainless steel pipes show excellent tolerance to various inorganic acids, organic acids and salt solutions. In the process of conveying strong acid and alkali liquids in the project, they can effectively resist chemical corrosion and prevent pipeline leakage. The service life is more than 3 times that of ordinary carbon steel pipes.
High strength and impact resistance: The yield strength of the pipe is ≥170MPa, and the tensile strength is ≥480MPa. Even under high-pressure transportation inside the pipeline and the impact of complex external environment, the structure can still be stable and avoid deformation and rupture.
Sanitary and environmental protection: The inner wall of the stainless steel pipe is smooth, not easy to scale and breed bacteria, and the material itself does not precipitate harmful substances. It avoids contamination of the medium in the field of chemical transportation, meets the requirements of environmental protection recycling, and can be 100% recycled.
Construction application and technical highlights
Professional connection process: It adopts a combination of argon arc welding and double clamping connection. Argon arc welding ensures that the strength of the pipe joint is consistent with the main body, and the sealing reaches the zero leakage standard; the double clamp connection improves the efficiency of on-site installation, shortens the construction period by 25%, and facilitates later maintenance and repair.
Precise installation design: According to the terrain of the chemical park and the flow direction of the medium, the stainless steel pipe is customized to be bent and cut to ensure a reasonable pipeline layout, reduce liquid transportation resistance, and improve transmission efficiency. At the same time, an insulation layer and an anti-ultraviolet coating are added to the outer wall of the pipeline to further enhance its durability in outdoor environments.
Strict quality inspection: During the construction process, each section of stainless steel pipe is pressure tested (the test pressure is 1.5 times the working pressure) and non-destructive testing is performed to ensure that the quality of the pipe and the joint meets the standard and ensure the safe operation of the entire pipe network system.
Project results and customer feedback
Stable operation: Since the pipe network system was put into use two years ago, it has experienced many tests of highly corrosive liquid transportation and extreme weather, and no leakage, corrosion perforation, etc. have occurred, ensuring the continuity of production in the chemical park.
Significant cost-effectiveness: Although the initial purchase cost of stainless steel pipes is slightly higher than that of ordinary pipes, due to their ultra-long service life and extremely low maintenance frequency, the project's full life cycle cost is reduced by 40%, saving the company a lot of money.
Highly recognized by customers: The person in charge of the chemical park said: "The excellent performance of stainless steel pipes far exceeded expectations. It not only solved the problem of conveying highly corrosive media, but also greatly reduced our operation and maintenance pressure, providing reliable guarantee for safe production in the park."
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