Metal Finishings Ltd offers fluorescent penetrant inspection. We offer this as a standalone service or in combination with treatments that we provide. Our dedicated NDT facility is AS9100 certified and Nadcap accredited. All inspection is performed on our site in Ferndown.
The standard turnaround time for NDT is 4 working days. We also offer a 48 hour or next day express turnaround is available for a premium. If a surface treatment is required as well as NDT, the treatment turnaround is additional. It may be necessary to allow a further 2 working days for new (non-repeat) parts.
Fluorescent Penetrant Inspection
Fluorescent penetrants are usually used when the maximum flaw sensitivity is required. A liquid penetrant is applied to the specimen and will be drawn into surface breaking flaws by capillary action. After penetrant that has been left on the surface has been removed, a developer is applied to the surface and this draws out penetrant that has been left in any cracks and allows the inspector to see an indication on the surface when examined under UV light. The indication produced on the surface by the penetrant is larger and much easier to see than the crack itself. Cracks as narrow as 150 nanometres can be detected.
Liquid penetrant testing can be used on non-porous material, whether metallic or non-metallic, as long as it can be suitably cleaned before inspection. It is is unsuitable for very dirty, rough or porous materials.
Various names are used for this NDT technique, including Fluorescent Penetrant Inspection (FPI) and Dye Penetrant Inspection ("dye pen" for short).
Specifications
- BS EN ISO 3452-1
- ASTM E1417
- ADS.E.0379
- DS 18.52
- TS-104
- VS 1-3-5-289
- WVC-ASME-PT
