Asme — Section V Article 9

ASME Section V, Article 9, provides the mandatory requirements for Visual Examination (VT) within the Boiler and Pressure Vessel Code (BPVC)

Conclusion

• In-process inspection during pressure vessel fabrication
• Weld visual inspection after welding (VT-1, VT-2, VT-3)
• Final assembly examination prior to hydrotest
• In-service visual inspection under API or NBIC

• Minimum light intensity at the part surface: 100 foot-candles (1076 lux) for direct visual examination.
• For remote visual aids (borescopes, cameras), lighting must allow detection of relevant discontinuities.

Referenced Standards

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3. Procedure Requirements

Based on the requirements of ASME Section V Article 9, the following recommendations are made: asme section v article 9

: Used when the area is inaccessible for direct viewing. It employs tools like mirrors, borescopes, telescopes, or cameras that must have resolution at least equivalent to direct observation. Translucent Visual Examination ASME Section V, Article 9, provides the mandatory

Article 9 categorizes visual testing into two primary techniques: Minimum light intensity at the part surface: 100