G.M. HI-TECH (UNIT-II)
DOC NO:- FM/QP/27
DYE PENETRATION
Procedure
ISSUE:-01
ISO-3452-1-2021
REV:-00
DATE:-10.10.2021
CERTIFICATE
We hereby certify that repair procedure no FM/QP/27 “Dye Penetration procedure” meets the requirement
ISO-3452-1-2021
THE SIGNATURE BELOW AUTHORISE ALL PAGE OF THIS PROCEDURE FOR USE FROM THE DATE OF APPROVAL
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PREPARED BY
APPROVED BY
G.M. HI-TECH (UNIT-II)
DOC NO:- FM/QP/27
DYE PENETRATION
Procedure
ISSUE:-01
ISO-3452-1-2021
REV:-00
DATE:-10.10.2021
TABLE OF CONTENTS
1. Scope
2. Reference Codes & Standards
3
4
5
6
7
8
Approved Penetrant Materials
Process Sequence
Test Procedure
Acceptance criteria
Post Examination Cleaning
Recording
G.M. HI-TECH (UNIT-II)
DOC NO:- FM/QP/27
DYE PENETRATION
Procedure
ISSUE:-01
ISO-3452-1-2021
REV:-00
DATE:-10.10.2021
DYE PENETRATION PROCEDURE
1. Scope:
This document specifies a method of penetrant testing used to detect discontinuities,
e.g. cracks, laps, folds, porosity and lack of fusion, which are open to the surface of the
material to be tested using white light or UV-A (365 nm) radiation. It is mainly applied to
metallic materials, but can also be performed on other materials, provided that they are
inert to the test media and not excessively porous.
This document also includes requirements for process and control testing, but is not
intended to be used for acceptance criteria. It gives neither information relating to the
suitability of individual test systems for specific applications nor requirements for test
equipment.
2. References Codes & Standards:
ISO 3059, Non-destructive testing — Penetrant testing and magnetic particle testing —
Viewing conditions
ISO 3452-2, Non-destructive testing — Penetrant testing — Part 2: Testing of penetrant
materials
ISO 3452-3, Non-destructive testing — Penetrant testing — Part 3: Reference test blocks
ISO 3452-4, Non-destructive testing — Penetrant testing — Part 4: Equipment
ISO 3452-5, Non-destructive testing — Penetrant testing — Part 5: Penetrant testing at
temperatures higher than 50 degrees C
ISO 3452-6, Non-destructive testing — Penetrant testing — Part 6: Penetrant testing at
temperatures lower than 10 degrees C
ISO 12706, Non-destructive testing — Penetrant testing — Vocabulary
3. Approved Penetrant Materials:
The dye, developer & cleaner (all of same make) used for DP test shall be of reputed
brands like Magna flux, P Met, Flaw guide, Orion & NDT and shall be of spray type
conforming to the specifications given in ASME sec V. Dye need not be spray type. It can
be applied using paint brush. Penetrant material shall be as per ISO-3452-2
4. Process Sequence :
A) Preparation and pre-cleaning (5.1)
B) Application of penetrant (5.3)
C) Excess penetrant removal (5.4)
D) Application of developer (5.5)
E) Inspection
(5.6)
G.M. HI-TECH (UNIT-II)
DOC NO:- FM/QP/27
DYE PENETRATION
Procedure
ISSUE:-01
ISO-3452-1-2021
REV:-00
DATE:-10.10.2021
5. Test Procedure
5.1 PRE CLEANING:
Surface & adjacent areas within 1" to be examined shall be dry & free of all dirt, grease,
lint, scale, welding flux etc. that can obscure surface openings or otherwise interfere
with the examination. Typical cleaning agents that may be used are detergents, organic
solvents, descaling solutions & paint removers.
the parts or areas of parts to be inspected shall be clean & dry before the penetrant is
applied. Area under examination shall be thoroughly cleaned with the cleaner from the
same group of penetrant materials. Cleaning shall be by spraying or brushing and wiping
with a lint free cloth. Any traces of lint shall be removed. Drying shall be accomplished
by exposure to ambient temperature & a drying time of min 30 seconds shall be
provided.
5.2 Temperature Limits:
The temperature of the Penetrant materials & the surface of the part to be examined
shall not be below 10°C or above 50°C throughout the examination period.
Temperature may be measured with 50°C thermal chalk.
5.3 Penetrant Application:
Apply the Penetrant to the weld face side to be examined. During dwell time ( 10 -15
min.), if necessary, the Penetrant may be re-applied in case the first coat gets dried up. If
the surface to be examined is large enough to preclude complete examination within 15
minutes of developer application, the examination shall be performed in increments. If
the Penetrant dwell time exceeds the max. Of 15 mints. Then, testing shall be repeated
from pre cleaning stage.
5.4 Removal Of Excess Penetrant:
After the required Penetrant dwell time, excess Penetrant shall be removed as far as
possible by wiping with a dry, clean cloth ( lint free) repeating the operation until most
traces of Penetrant have been removed. All traces of lint shall be removed. Flushing the
surface with cleaner following the application of Penetrant & prior to developing is
prohibited. The part surface shall be allowed to dry by normal evaporation & a drying
time of minimum 30 seconds shall be allowed prior to application of developer.
G.M. HI-TECH (UNIT-II)
DOC NO:- FM/QP/27
DYE PENETRATION
Procedure
ISSUE:-01
ISO-3452-1-2021
REV:-00
DATE:-10.10.2021
5.5 Application Of Developer:
Application of developer on the face side to check surface defects shall be by spraying
to assure complete coverage with a thin & even film. Developer shall be applied as soon
as possible after removal of excess penetrant but within 10 minutes maximum.
Interpretation & evaluation of the discontinuity indications shall be carried out after
developer time of min. 10 minutes & max. 60 minutes. The level of luminance for
removal of excess penetrant shall be at least 350 lx. For inspection, the luminance at the
test surface shall be 500 lx or greater. In some cases, a minimum of 1000lx may be
required
5.6 INTERPRETATION & EVALUATION OF INDICATIONS:
a) Final interpretation shall be made within 10 to 15 minutes after the application of
developer. b) viewing condition shall confirm to ISO 3059. c) A linear indication is one
having a length greater than three times the width. d) A round indication is one of
circular or elliptical shape with the length equal to or less than three times the width. E)
Any questionable or doubtful indications shall be re-examined to determine whether or
not they are relevant. F) Any adjacent indication separated by less than the major
dimension of the smaller shall be assessed as a single continuous indication.
6 ACCEPTANCE CRITERIA:
The acceptance standards shall apply unless specified is ISO 5817 quality level C.
7 POST EXAMINATION CLEANING:
Post examination cleaning shall be carried out as soon as practical with a cloth soaked
with cleaner.
8 Record
Liquid Penetrant examination report shall be prepared and submit to purchaser for
review.
Prepared By:-
Approved By:-