1. Q: What is the maximum recommended service temperature for A106B?
A: A106 Grade B is suitable for service up to approximately 425°C (800°F). For higher temperatures, Grade C or alloy steels are used.
2. Q: Is Q235B suitable for high-temperature service?
A: No. Q235B is not designed for sustained elevated temperature service. Its strength decreases significantly at temperatures above 350°C, and it is not covered by pressure vessel or high-temperature piping codes.
3. Q: In which industries is A106B predominantly used?
A: Power generation (boiler tubes, steam lines), oil & gas refineries, chemical plants, and any process industry requiring high-temperature/pressure piping.
4. Q: Where is Q235B pipe commonly used?
A: Building structures, fences, scaffolding, low-pressure water and gas pipelines, agricultural equipment, and general machinery where high strength is not critical.
5. Q: Can A106B be used for low-temperature service?
A: Standard A106B is not intended for low-temperature service. For sub-zero temperatures, materials with guaranteed impact toughness (like ASTM A333 Grade 6) are required.
