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Pressure Test

A controlled test performed to verify the integrity, strength and leak-tightness of pressure-retaining equipment.

Definition

A Pressure Test is a controlled procedure used to verify the structural integrity, pressure-retaining capability and leak-tightness of pressure vessels, piping or other pressure equipment by applying a specified test pressure under controlled conditions. Pressure testing is commonly performed during fabrication, installation, repair or recertification to demonstrate compliance with applicable engineering codes and specifications.

Why It Matters

Pressure Tests verify that pressure-retaining equipment can safely withstand specified test conditions before being placed into or returned to service.

In Practice

Pressure Tests may be hydrostatic or pneumatic depending on equipment design, service requirements, applicable codes and safety considerations.

Common Misuse

A Pressure Test verifies the integrity of pressure equipment under controlled test conditions, whereas in-service inspection evaluates equipment condition during its operational life.

Term Details
Synonyms:
Pressure Test; Hydrostatic Test; Pneumatic Test; Pressure Integrity Test
Classification:
Inspection & NDT
Methodology
Intermediate
Applications

Inspection; Pressure Equipment; Quality Assurance.

Where It's Used

Pressure vessels.; Piping.; Petrochemical.; Oil and gas.; Power generation.

References

ASME B31.3; ASME BPVC Section VIII Division 1; API 570

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