Dye Penetrant Inspection

By choosing Alliance Marine Surveyors and Consultancy for your dye penetrant inspection, we can offer you a fast reaction test. We can provide the inspection service that will ensure your products or equipment is fit for purpose and meets the requirements of the applicable standard.

Alliance Marine Surveyors and Consultancy offers crack testing and inspection services for propellor shafts and other materials, and components using Liquid Dye Penetrant Testing. This testing may be completed during a survey to ensure the integrity of your propellor, rudder shaft chain plates and fixed rigging systems.

Dye Penetrant Inspection (DPI), also called liquid penetrate inspection or penetrant testing, is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials. Read More…

Penetrant inspection is a non-destructive method of inspection that can detect defects that manifest at the surface of a part, such as cracks or porosity to a shaft. Penetrant is applied to test a component such as a shaft, and after adequate penetration time has been allowed, the excess penetrant is removed and a developer is applied. A very small defect, that may be completely invisible to the naked eye, produces a dye indication in the developer that is much larger, and therefore much easier for the Surveyor to see.

All forgings shall be free of cracks, crack-like indications, laps, seams, folds, or other injurious indications. At the request of the Surveyor, additional magnetic particle, liquid penetrant and ultrasonic testing may be required for a more detailed evaluation of surface irregularities.