Q: What is the typical wall thickness for API 5L X70 in offshore pipelines?
A: Wall thickness varies by design, but common ranges are 0.5 to 1.5 inches (12.7 to 38.1 mm) for offshore pipelines.
Q: What is the chromium content in ASTM A335 P11?
A: ASTM A335 P11 contains 1.00-1.50% chromium.
Q: How does ASTM A335 P91 compare to P22 in high-temperature strength?
A: P91 has higher creep strength due to 9% chromium and molybdenum, while P22 (2.25% chromium) is used for lower temperatures; P91 is suitable up to 1200°F (649°C).
Q: What heat treatment is required for ASTM A335 P5?
A: ASTM A335 P5 (5% chromium) is typically normalized and tempered to achieve desired mechanical properties.
Q: What is the corrosion resistance of ASTM A312 TP316 in chloride environments?
A: TP316 has better chloride resistance than TP304 due to 2-3% molybdenum addition, making it suitable for marine and chemical exposures.
