MIL-F-21527B(Wep)
4.5.4.2
Leakage Test - To meet the requirements of
paragraph 3.3.2, each air flask shall be subjected to an
internal air pressure of 4400-4600 psig to test for leak-
age around the neck and belled section. Any evidence of
leakage shall be cause for rejection.
4.5.4.3
Magnetic Particle Test - Each air flask,
before being coated, shall be magnetic particle inspected
in accordance with Standard MIL-STD-271.
4.6
Preproduction Tests
4.6.1
Chemical Analysis Test - To meet the require-
ments of 3.2.2. drillings shall be taken out of pipe from
each heat of steel and submitted to a Government labora-
tory for chemical analysis. The pipe shall be stamped by
the Government Inspector for identification.
4.6,2
Bend Test - To-meet the requirements of 3,3,4,
a transverse test specimen, of suitable length and from
1 to 2 inches in width, shall be cut from the wall of the
sample flask. The corners of' the cross section of the
specimen may be broken with a smooth file, but no appre-
ciable rounding of the corners will be permitted. The
specimen shall be bent inwardly until the greatest dimen-
sion between the outside surface does not exceed six times
the thickness of the specimen, The specimern shall not
fracture or show other defects.
4.6.3
Tension Test - Four tension-test specimens
shall be cut longitudinally from the sample flask selected
by the Government Inspectorj at points approximately 90
degrees from one another. The tension tests shall be con-
ducted in accordance with Appendix II, Part A of General
Specifications for Inspection of Materials; the specimens
shall be Type 4 as specified therein and shall meet the
requirements of 3.3.5.
4.6.4
Corrosive Atmosphere Test - The air flask
shall be subjected to a simulated sea atmosphere in accord-
ance with Specification MIL-E-5272 to meet the requirements
of 3.4.1.
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