X52 pipeline steel is a kind of high-quality low carbon steel, widely used in oil, natural gas and other pipeline transportation fields. The following is a detailed analysis of X52 pipeline steel:
1, Definition and use
Definition: X52 pipeline steel is a low carbon steel produced according to specific standards (such as API5L, GB/T21237, etc.) for pipeline construction. The “X” in its grade represents pipeline steel, and the “52” represents the small yield strength value of the steel plate is 52ksi(1ksi=6.895Mpa), that is, about 360Mpa.
Uses: Mainly used in oil, natural gas and other pipeline transportation fields, but also suitable for other fluid transportation fields such as chemical raw materials, water and so on. Its high strength, high toughness, good weldability and corrosion resistance make it an ideal material for these fields.
2, the main characteristics
High strength: X52 pipeline steel has high tensile strength and yield strength, and can withstand high pressure and tensile force.
High toughness: while under high pressure, cracks or fractures can be avoided to ensure the safe operation of the pipeline.
Corrosion resistance: In the process of conveying medium, it can resist the erosion of various corrosive substances and extend the service life of the pipeline.
Good weldability: The use of various welding methods can obtain good welding results to ensure the tightness and reliability of the pipeline.
Good economy: Compared with other high-grade steel, the price of X52 pipeline steel is relatively low, which is conducive to reducing the cost of pipeline construction.
3，Chemical composition and mechanical properties
Chemical composition: C content ≤0.26%(welded) or ≤0.28%(seamless), Mn content ≤1.40%, P, S content ≤0.030%, Cu, Ni, Cr content ≤0.5%, Mo content ≤0.15%. In addition, the total content of V, Nb and Ti should not be greater than 0.15%.
Mechanical properties: yield strength ≥360Mpa, tensile strength ≥460Mpa, elongation ≥ a certain value (the specific value is related to the cross-sectional area of the tensile sample).
4，Production and inspection
Production process: The production of X52 pipeline steel needs to go through steel making, rolling, heat treatment and other links. Among them, the rolling process includes perforation, tube rolling, sizing, straightening and other steps to ensure the dimensional accuracy and surface quality of the steel pipe.
Inspection standard: X52 pipeline steel should meet the relevant standards, such as API5L, GB/T21237 and so on. In the inspection process, the chemical composition, mechanical properties, dimensional deviation, surface quality, etc. of the steel pipe need to be comprehensively tested to ensure that its quality meets the standard requirements.
5，Market and Application
Market situation: X52 pipeline steel is widely used in domestic and foreign markets, with the continuous development of oil, natural gas and other energy industries, its market demand is also continuing to grow.
Application fields: In addition to oil and gas pipeline transportation, X52 pipeline steel can also be used in chemical, water conservancy, construction and other fields of structural parts manufacturing and fluid transportation pipeline construction.
