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Davor Sdn Bhd
32-G, Jalan Puteri 5/16,
Bandar Puteri Puchong,
47100 Puchong,
Selangor, Malaysia.
+6011-26139527 (Office)
+6012-2919166 (Sales)
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13A, Jalan Kencana 1A/24,
Taman Pura Kencana,
83300 Batu Pahat,
Johor, Malaysia.

Dye Penetrant (dye pent)

Dye Penetrant Inspection

Dye penetrant inspection, also called dye pent testing or flaw and crack detector is widely applied as a non destructive inspection method. It is used to detect casting, forging and welding surface defects such as hairline fractures, crack and flaws. it is also used to check potential fatigue cracks or flaws during maintenance where parts are subjected to heavy stress. 
The Dye Penetrant Testing Principles
Dye Penetrant Testing is based upon capillary action, where low surface tension fluid (penetrant) penetrates into defected areas. Penetrant may be applied to the test piece by spraying or brushing. After adequate penetration time also called dwell time, the excess penetrant is cleaned carefully and a developer is applied. The developer helps to draw penetrant out of the flaw to reveal surface breaking flaws by bleed out of a colored dye. 

a penetrant penetrate to test piece flaws or cracka developer draw out penetrant from crack and flaws (blood out colored dye)

Dye Penetrant Inspection Steps
Remove all surface contamination such as oil, grease and dust. Spray surface with cleaner and clean thoroughly with absorbent cloth until no further contamination is evident on the cloth/tissue. 
Parts must be at ambient temperature before spraying. Liberally spray the area with Penetrant and allow 5 minutes contact time. Allow up to 20 minutes for very fine cracks. 
Spray Cleaner onto an absorbent lint-free cloth and wipe off excess from surface until no further Penetrant is evident on the cloth. This step is vital to ensure cracks and flaws are detected. 
Shake container before use. Spray on a thin, even film of Developer and leave on for at least 10 minutes before inspecting for the fine flaws. 
Good daylight or artificial illumination will show up any flaws as continuous red lines for cracks or pin points for porous parts. 

Non Defect Vs Defect Test Piece
Picture below shows a test piece without defects (left) and test piece with defects (right). 

dye penetrant testing shows a test piece without defects  dye penetrant testing shows a test piece with defects

Advantages and Disadvantages of Dye Penetrant Testing 
- It can be used in almost all non porous material. 
- It is simple and low cost for a single inspection. 
- It is only suitable for surface detection. 
- There is no informaiton about the depth of flaws can be gained. 
- Rough surfaces are difficult to test. 

Lube Tips - The Correct Dye Penetrant Steps

Lube Tips - All ABout Penetrant and Dwell Time (Dye Penetrant Liquid)

Lube Tips - All ABout Developer (Dye Penetrant Liquid)

Contact our Dye Penetrant Spray Consultant in area Malaysia (Selangor( Klang, Shah Alam, Subang), Kuala Lumpur (Sungai Buloh), Sepang, Negeri Sembilan, Melaka, Johor(Johor Bharu,Muar,Batu Pahat), Pahang (Temerloh, Kuantan), Kelantan, Terengganu, Perak (Ipoh), Kedah, Perlis, Penang, Sabah, Sarawak), Indonesia, Singapore, Thailand, Philippines, Vietnam, Laos, Myanmar, Cambodia, Brunei at sales@davor.com.my.


Spanjaard Dye Penetrant Spray Flaw and Crack Detector


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