TM 1-1520-265-23
Table 1-6. Penetrant Procedure (Type I, Method D)
Task
Description
a. Preparation of Part:
Refer to Preparation of Part or Area for NDI, paragraph
1.4.4.
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 rewet-
ting of parts.
e. Penetrant Prerinse:
Prerinse part with a water spray at a temperature of 16°C to
38°C (60°F to 100°F) and a spray pressure of 40 PSIG
maximum. Do not overrinse.
f. Remover Application:
Apply a solution as recommended by manufacturer of the
specific 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°C to
38°C (60°F to 100°F) and a spray pressure of 40 PSIG
maximum. 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°C
(140°F) until dry. Then apply the developer. If an
aqueous developer is to be used, then submerge the part
in the developer solution immediately after washing. Fol-
low 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) Pene-
trant (Refer to Table 1-8).
1-25
