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Minimum Required Thickness

The minimum wall thickness required for equipment to safely withstand its design or operating conditions.

Definition

Minimum Required Thickness is the minimum wall thickness necessary for a pressure-retaining component to safely resist the specified pressure, mechanical loads and applicable design conditions in accordance with the governing engineering code. It is commonly used during inspection and fitness-for-service assessments to determine whether equipment remains suitable for continued operation.

Why It Matters

Minimum Required Thickness defines the lowest acceptable wall thickness for the safe operation of pressure equipment.

In Practice

Remaining wall thickness is routinely compared with the Minimum Required Thickness during inspections to evaluate corrosion, erosion, remaining life and continued fitness for service.

Common Misuse

Minimum Required Thickness defines the minimum acceptable wall thickness for safe operation, whereas actual measured thickness reflects the current physical condition of the equipment.

Term Details
Synonyms:
Minimum Required Thickness; MRT; Required Thickness; Remaining Thickness
Classification:
Mechanical Integrity
Concept
Advanced
Applications

Mechanical Engineering; Inspection; Pressure Equipment.

Where It's Used

Pressure vessels.; Piping.; Refineries.; Petrochemical.; Oil and gas.

References

API 579-1/ASME FFS-1

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