FAQ

❓ What's the difference between medium and low temperature in pressure vessel steel?

When selecting steel plates for pressure vessels, storage tanks, and petrochemical equipment, medium temperature pressure vessel steel and low temperature pressure vessel steel are often confused.
The key difference is not whether the steel "can be used in cold weather", but the design temperature, applicable standards, and low-temperature impact toughness requirements.

❓ How to Choose the Correct Pressure Vessel Steel?

Steel selection should always be based on design temperature, not ambient temperature:

Design temperature ≥ −20°C → Medium temperature pressure vessel steel
Design temperature < −20°C → Low temperature pressure vessel steel is mandatory

This distinction is critical during engineering design, third-party inspection, class approval, and owner review.

❓ Can Medium Temperature Pressure Vessel Steel Be Used for Low Temperature Service?

Medium temperature pressure vessel steel should never be treated as a substitute for low temperature pressure vessel steel.
The boundary at −20°C exists to prevent brittle fracture and ensure long-term safety.
Correct material selection based on design temperature and applicable standards is essential for compliance, safety, and successful project approval.

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