1. What is the service life of high-specification carbon steel seamless pipes?
Answer: Due to better mechanical properties and more strict production control, the service life is 8-15 years under normal working conditions; even in harsh environments, it can reach 5-10 years (with appropriate anti-corrosion treatment).
2. Can common carbon steel seamless pipes be used to transport oil and gas?
Answer: Yes, but they are only suitable for low-pressure oil and gas transmission (pressure ≤1.6MPa). For high-pressure oil and gas transmission (pressure >1.6MPa), high-specification pipes such as 16Mn/Q345 are required to ensure safety.
3. What is the difference in price between common and high-specification carbon steel seamless pipes?
Answer: The price of high-specification carbon steel seamless pipes is 30%-80% higher than that of common ones. The reasons include higher raw material costs (high-quality steel billets), more complex production processes (precision rolling, heat treatment), and stricter quality control.
4. What is the maximum pressure that common carbon steel seamless pipes can bear?
Answer: The maximum working pressure of common carbon steel pipes (10#, 20#) is 1.6-4.0MPa, which depends on the wall thickness and diameter. The thicker the wall thickness, the higher the pressure-bearing capacity.
5. What is the maximum pressure that high-specification carbon steel seamless pipes can bear?
Answer: High-specification pipes such as 16Mn/Q345 can bear a maximum working pressure of 6.3-16.0MPa, and 45# pipes (after quenching and tempering) can bear a pressure of more than 10.0MPa, which is suitable for high-pressure equipment and pipelines.
