Pt Procedure No Times

8/3/2019 Pt Procedure No Times

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Dye Penetrant (PT) Procedure

By: Associate Professor Stephen Collins

Last revised: March 13, 2005

For informational PT only.

This is not an authorized procedure for

inspection to any code or specification.


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Safety

You must have documented MSDS training

on PT materials before using them.

Wear safety glasses and gloves (illustrationshere do not show gloves, but you must wear

them when handling PT materials)


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1. Degrease the surface to be

inspected. Skip this step if no grease or oil is present.

Coat the area to be inspected with Cleaner

Let grease dissolve, wipe dry with clean cloth Allow Cleaner to evaporate

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2. Clean the surface by sanding

or wire brushing.

Skip this step if surface is clean and smooth.

Grinding leaves deep scratches, making it

difficult to clean. Follow up with sanding.


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3. Apply the penetrant

holding the spray can back about 12 from

the surface using a sweeping motion.

Use only enough penetrant to cover theinspection area.


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4. Let stand for 10 minutes

to allow penetrant to enter flaws open to the

surface.


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5. Wipe the surface

with a clean dry rag to remove penetrant


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6. Clean the surface

using a rag premoistened with

cleaner/solvent.

Do not flush the surface withcleaner/solvent

Repeat until all

traces of penetrantare removed, rag

comes up clean.


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to allow cleaner to evaporate


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8. Apply the developer

Shake the can vigorously, make it rattle

holding can back about 12 from surface,

using a sweeping motion.

Several light coats

will dry more quickly.

Do not allow to sag

or puddle.


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observing indications as they develop to aid

in identification.

Interpret and

evaluate any

flaws by

comparison

to a suitable

standard.


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Examples of PT

Excavations of defects in castings


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Can you find the flaws?


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These are easier to see


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References

Magnaflux Corporation (2005) Spotcheck DyePenetrant Operating Instructions. RetrievedMarch 13, 2005 from

http://www.magnaflux.com/files/library/operating/Spotcheck~reg_Kit_Operating_Instructions.pdf

NDT Resource Center (n.a.)Introduction to DyePenetrant Testing. Retrieved March 13, 2005 from

http://www.ndt-ed.org/EducationResources/CommunityCollege/PenetrantTest/Introduction/history.htm


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Links

http://technology.open.ac.uk/materials/mem/mem-

dye.html The Open University, Faculty of

TechnologyDye Penetrant Testing.

http://www.nde.lanl.gov/default.htm Los Alamos

National Laboratory, Engineering Sciences &

Applications (ESA) Division

http://www.ndt.net/index.htmlNDT Net, the e-Journal of Nondestructive testing

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