FPI inspection procedurewwwwwwwwww9 .pdf

FPI

1. POOYA EGERGY ARSHAM CO. (PEA)


Fluorescent Penetrant Inspection (FPI)
Procedure
Document Number: PEA-FPI-LGT-002
Revision: 01
Date: [2025-05]
Prepared by: [A. Soltanpour]
Approved by: [H.ghorbani]
1. Scope
This procedure establishes the requirements and guidelines for performing Fluorescent
Penetrant Inspection (FPI) on Nozzle gas turbine during maintenance and repair to detect
surface discontinuities.
2. References
- ASTM E1417 – Standard Practice for Liquid Penetrant Testing
- ASTM E165 – Standard Practice for Liquid Penetrant Examination
- OEM Component Repair Manual
3. Equipment and Materials
 Penetrant System: Type I (Fluorescent), Method A (Water Washable, W. Temp.: 35-
38° C): MAGNAFLAX- ZL-60C
 Cleaner/remover: Approved cleaner compatible with penetrant system (water
washable): MAGNAFLAX- SKC-S
 Developer: Non-aqueous, dry powder: MAGNAFLAX -SKD-S2
 Ultraviolet (UV-A) light source: Minimum 1500 µW/cm² at 15 in (38 cm)
 Inspection booth: Darkroom conditions with light intensity <2 fc.
4. Surface Preparation
Ensure the component surface is clean, dry, and free from oil, grease, dirt, rust, paint, or
other contaminants.
Cleaning methods: Solvent cleaning, alkaline cleaning, or vapor degreasing.
Abrasive methods (e.g., grit blasting) only if allowed by OEM repair instructions.

2. POOYA EGERGY ARSHAM CO. (PEA)


5. Procedure Steps
5.1 Pre-Cleaning
Use approved solvents or degreasers. Dry thoroughly before applying penetrant.
5.2 Application of Penetrant
Apply the fluorescent penetrant by imme rsion, brushing, or spraying.
Dwell time: As per penetrant manufacturer’s instructions and component material
(typically 15–25 minutes).
5.3 Excess Penetrant Removal
For Method A: Gently rinse the component using water spray (<40 psi) at ambient
temperature (60–100°F / 16–25°C).
Avoid over-washing to prevent removing penetrant from defects.
5.4 Drying
Use clean, filtered air or drying oven. (at the moment: not available)
Temperature must not exceed 120°F (49°C).
Dry until no visible water remains.
5.5 Application of Developer
Apply evenly by aerosol spray, dusting, or immersion.
Ensure a uniform, thin layer.
Allow adequate development time (minimum 10 minutes, maximum 20 minutes before
inspection).
5.6 Inspection
Perform under UV-A light with ambient white light not exceeding 2 fc.
Examine all surfaces for indications using 10x magnification as needed.
Record and classify all discontinuities per the applicable standard or OEM limits.
6. Acceptance Criteria
As per component OEM repair manual or customer specification.
Typical indications: Cracks, linear discontinuities, porosity, etc.
Reject if indications exceed acceptable limits or are in critical areas.

3. POOYA EGERGY ARSHAM CO. (PEA)


7. Post-Cleaning
Remove all inspection materials from the component.
Use solvent cleaning or water rinse followed by drying.
8. Safety and Environmental Considerations
Use personal protective equipment (PPE): gloves, goggles, and lab coats.
9. Records and Documentation
Maintain inspection records including:
Inspector name
Date and time
Component serial number
Penetrant batch number
Results and disposition: based on the inspection, the FPI report should be fill and approve.
10. Qualifications
- Inspectors must be certified to ASNT or equivalent (Level I, II, or III).