1. Question: What is the application of 20# carbon steel pipe in the petrochemical industry?
Answer: 20# carbon steel pipe is widely used in the petrochemical industry, such as transporting crude oil, natural gas, and chemical reagents. It has good toughness and weldability, and can adapt to the general working conditions of the petrochemical industry.
2. Question: What is the difference between 10# and 20# carbon steel pipes?
Answer: The main difference is the carbon content. 10# pipe has a lower carbon content (0.07-0.14%) than 20# pipe (0.17-0.24%), so 10# pipe has better plasticity and weldability, while 20# pipe has higher strength and hardness, suitable for scenarios with higher load requirements.
3. Question: Can 20# carbon steel pipe be used for high-temperature boiler pipelines?
Answer: 20# carbon steel pipe can be used for low-temperature and low-pressure boiler pipelines (operating temperature ≤ 450°C). For high-temperature and high-pressure boiler pipelines, it is necessary to use special boiler steel pipes such as 15CrMoG.
4. Question: What is the standard for Q235B carbon steel pipe in China?
Answer: Q235B carbon steel pipe complies with the Chinese standard GB/T 3091-2015 (Welded steel pipes for low pressure fluid transport) and GB/T 8163-2018 (Seamless steel pipes for fluid transport), which specifies its size, performance, and quality requirements.
5. Question: What is the wall thickness tolerance of A106 Grade B carbon steel pipe?
Answer: According to ASTM A106 standard, the wall thickness tolerance of A106 Grade B carbon steel pipe is ±12.5% of the nominal wall thickness, ensuring the uniformity and pressure-bearing capacity of the pipe wall.
