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API 5L structural steel pipe: a global standard for energy transmission
Q235B is a carbon structural steel grade in China's GB/T 700 standard, with core characteristics of yield strength of not less than 235MPa and moderate amounts of carbon and manganese elements. Compared with ordinary Q235, Q235B is required to pass the 20°C impact test to ensure the toughness of the material at room temperature. It is suitable for architectural and engineering structures with clear requirements for mechanical properties, and is a general-purpose steel for the industrial sector.
Differences from API 5L PSL1: Basic and Advanced
API 5L is divided into two grades, PSL1 and PSL2. PSL1 steel pipe is suitable for general conveying conditions, with relatively loose requirements, and is mainly used in low-pressure scenarios. PSL2 requires stricter chemical composition control, higher impact toughness, and comprehensive non-destructive testing, and is suitable for high-pressure, high-risk environments, such as deep-sea or polar pipelines.
Differences from API 5L PSL2: The ultimate in high performance
PSL2 steel pipe further enhances the performance from PSL1 by requiring stricter carbon equivalent control, Charpy Impact Test and Drop Weight Tear Test (DWTT) to ensure the pipe's resistance to brittle fracture at low or high temperatures. At the same time, PSL2 steel pipes must undergo comprehensive non-destructive testing to ensure defect-free delivery.
Engineering Applications: Full Scenario Coverage
API 5L steel pipe is widely used in land and ocean oil and gas transmission. PSL1 is mostly used for low pressure and short distance land pipelines, while PSL2 is suitable for high pressure, long distance and deep sea pipelines and other complex environments, providing safe and efficient solutions for global energy transmission.
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