8/12/2019 Homework Procedure PT

1/1

02/27/2014

NDTE 1410 VMD SP14 4 WK

Ortiz, Rogelio

PT Procedure

Procedure No:555-5555-4B-SP14 Code Ref: ASME Section 5 Article 6

Product:Field weld on 6 carbon steel pipe

Location:Unit 34, Wastewater to sump line

P&ID: 00246810PT Type:Type 2- Visible Color Dye

PT Method: C Solvent Removable

Prove-up Method:Navy LP prop consisting of a carbon steel plate with (3) welds. Both the plate

material and weld filler material are 300 series carbon steel. One weld is 1/32" reinforcement and is

contoured (ground); the second is 1//16" reinforcement in the as-welded condition; the third is an

as-welded root weld in a 90 V-groove. Plate contains (12) mirco-holes (NSTR-99) and (1) linear

indication (EDM Notch). Micro-holes are .004" to .005" in diameter and .008" to .010" deep. Notch is

typically .010 - .015" deep x .002 - .003" wide x .250" long. Plate is 1/2" thick x 5" x 7".

Materials: Spot Check Dye Penetrant Spray, Spot Check Cleaner, Spot Check Developer(dry), Wire

brush, Clean white, lint free rags. Copy of code Ref.

Step 1- Clean the part to be inspected thoroughly using a degreasing solvent. Force dirt and grime

out of hard-to-reach areas using a stiff-bristled brush that is softer than the part. Use a steel wirebrush on ferrous components and a natural or synthetic fiber brush on aluminum and magnesium

components. Use a clean rag to dry the part as much as possible. Allow the remaining solvent to

evaporate in an open area free from sources of ignition and check for any remaining surface

contamination. Repeat this step if any debris remains. Remove any protective paint or sealer from

the part as this will also affect the results of the test. Ref T- 642/T- 643

Step 2- Use the spray can of penetrant dye to completely cover the surface of the part. Repeat the

cleaning procedure if the dye does not adhere to certain areas of the part that may still have an oil or

grease film. Let the penetrant infiltrate into the surface of the part for 5-10 minutes. If the penetrant

dries completely, an additional light spray coat will be required before proceeding to the next step.

Ref T- 671/ T-672

Step 3- Wipe the penetrant off the surface using another dry clean towel. Spray solvent sparingly

onto the towel to slightly moisten it to help to remove any stubborn dried penetrant. Ensure that thetowel is not too wet, as this can wash penetrant out of any potential cracks or defects. The towel

should not leave any residue or trace of solvent immediately after it has passed over a surface. Ref T-

673/ T-673.3

Step 5- Shake the spray can of developer vigorously for up to 60 seconds. Hold the spray can 8 to 12

inches away from the part and try to cover only small areas at a time. Spray the developer lightly

over the surface of the part until a thin, uniform, pale white film is produced over the entire surface.

Watch the part as the developer dries. Ref- T-675/T-675.1

Step 6- Inspect the developed part surfaces. Defects will appear as bright red lines or dots. Larger

and brighter spots that continue to grow over time indicate more extensive or deep defects below.

Parts without any defects can now be reused. Clean all parts to be reused with solvent and a rag. Ref

T-676/T-676.1/T-676.2/T-680/T-690

Notes: In accordance with ASME Section 5, Article 6 Liquid Penetrant Examination, and discontinuities found shall

meet required specifications.