What is Dye Penetrant Inspection (DPI)?
Dye Penetrant Inspection (DPI) is a surface examination method that uses visible or fluorescent dye to identify surface‑breaking defects in non‑porous materials.
Method of Inspection | Applications
DPI is used to detect cracks, porosity, seams, laps, and surface discontinuities in welds, castings, forgings, and machined components.
Materials Suitable
- Carbon steel and stainless steel
- Aluminium and non‑ferrous alloys
- Welded and fabricated components
(Non‑porous materials only)
Inspection Capabilities
- Visible (colour contrast) penetrant testing
- Fluorescent penetrant testing
- On‑site and workshop inspections
- Fabrication and in‑service inspections
Process Overview
- Surface cleaning and preparation
- Application of penetrant
- Specified dwell time
- Removal of excess penetrant
- Application of developer
- Inspection and evaluation
Industries We Serve
Oil & Gas, Petrochemical & Chemical Plants, Power Generation, Manufacturing, Mining
Key Benefits
- High sensitivity to surface defects
- Cost‑effective inspection method
- Quick and reliable results
- Portable and versatile application
- Supports quality assurance programmes
Reporting & Deliverables
- Inspection reports with defect descriptions
- Photographic evidence (where applicable)
- Acceptance evaluation to applicable standards
- Repair and re‑inspection recommendations
An online reporting system is available to our customers, allowing 24/7 access to reports
Why Choose Us?
- Certified and experienced DPI technicians
- Strict process control and surface preparation
- Consistent and repeatable results
- Trusted inspection support