Dye Penetrant Inspection
Capillary dye highlights surface-breaking defects on non-porous materials.
Dye Penetrant Inspection is one of the most versatile surface‑breaking inspection methods we offer, suitable for a wide range of materials and component types. At Charlton Metal Testing, our DPI technicians carry out both visible and fluorescent penetrant testing, selecting the most appropriate system to suit the environment, material, and sensitivity requirements of each job.
Our teams are used to working in fabrication shops, construction sites, shutdown environments, and in‑service plant, and we mobilise quickly across the UK and beyond. For fluorescent DPI, we bring full dark‑tent capability to site, allowing us to create controlled lighting conditions anywhere — from open yards to confined spaces — ensuring high‑contrast, high‑sensitivity results even in challenging environments.
Whether inspecting welds, machined surfaces, castings, or critical components, we deliver clean, well‑defined indications supported by accurate interpretation and clear reporting.
Why dye penetrant inspection?
- Highly effective for detecting surface‑breaking defects on both ferrous and non‑ferrous materials
- Suitable for a wide range of components including welds, castings, forgings, and machined parts
- Fluorescent and visible systems available, depending on sensitivity and site conditions
- Portable and adaptable, ideal for both workshop and field environments
- Minimal equipment footprint, allowing access to tight or restricted areas
- Immediate results with clear, easy‑to‑interpret indications
- A trusted method across fabrication, engineering, and maintenance sectors
Get in touch
Our offices are open Monday to Friday, 8:00–16:30, with technicians and support staff available to assist with bookings, enquiries, and project planning.
While our office hours are fixed, emails are monitored throughout the weekend, ensuring urgent requests are picked up quickly and responded to without delay.
