TM 1-1520-253-23
Task
Description
a. Preparation of Part:
b. Precleaning Procedure:
Refer to TM 1-1500-344-23.
c. Penetrant Application:
The penetrant may be applied by brushing, spraying, or dipping.
d. Penetrant Dwell:
Allow a minimum of 30 minutes dwell time to a maximum of
240 minutes. Extended dwell times may require rewetting of parts.
e. Penetrant Prerinse
Prerinse part with a water spray at a temperature of 16 to
C
38 (60 to 100 ) and a spray pressure of 40 PSIG max-
C
F
F
imum. Do not overrinse.
f. Remover Application:
Apply a solution as recommended by manufacturer of the spe-
cific hydrophilic remover in water to surface of the part.
Dwell time shall be kept to an absolute minimum consistent
with complete removal of excess penetrant.
g. Postrinse Operation:
Postrinse part with a water spray at a temperature of 16 to
C
38 (60 to 100 ) and a spray pressure of 40 PSIG max-
C
F
F
imum. Do not overrinse. Rinse effectiveness should be
checked with a black light to ensure complete removal of
penetrant remover.
h. Drying/Developer Operation:
If a dry nonaqueous developer is to be used, first dry the part in
a drying oven at a temperature not to exceed 60 (140 )
C
F
until dry. Then apply the developer. If an aqueous developer
is to be used, then submerge the part in the developer solu-
tion immediately after washing. Follow by drying the part in
a drying oven as mentioned above. In either case, parts
shall be removed from the drying oven as soon as they are dry.
i. Inspect:
Perform inspection under black light.
j. Materials:
Type I, Method D, Level 3 or 4 (hydrophilic remover) Penetrant