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|  MIL-P-27431B(USAF)
specified, the supplier may utilize his own or any other inpection facilities and
services acceptable to the Government. Records of inspection and tests shall be
prepared, maintained, and made available to the Government as specified in the
contract or order. The Government reserves the right to perform any of the
inspections set forth in the specification where such inspections are deemed
necessary to assure supplies and services conform to prescribed requirements.
"4.4.1 Responsibility for compliance. All items must meet all requirements of
sections 3 and 5. The inspection set forth in this specification shall become a part
of the contractor's overall inspection system or quality program. The absence of any
inspection requirements in the specification shall not relieve the contractor of the
responsibility of assuring that all products or supplies submitted to the Government
for acceptance comply with all requirements of the contract. Sampling in quality
conformance does not authorize submission of known defective material, either
indicated or actual, nor does it commit the Government to acceptance of defective
material."
4.2 Classification of tests. The inspection and testing of the purging unit
shall be classified as follows:
a. First article tests . . . . . .... . . . . . See 4.4
b. Quality conformance tests . . . . . . ..See 4.5
4.3 Test conditions.
4.3.1 Pressures and temperatures. Test equipment used to measure pressure and
temperatures shall be accurate to within 2 percent of actual values of pressure and
temperature specified.
4.3.2 Flow rates. Test equipment used to measure flow rates shall be accurate
to within 3 percent of actual values based on SLPM.
4.3.3 Other measurements. Any other measurements necessary for indication of
compliance or noncompliance to test provisions specified herein shall be accurate to
within at least 1 percent of the quantity being measured.
4.4 First articles.
4.4.1 First article test sample. The contractor shall subject one complete
purging unit to the first article tests specified in 4.4.4 except the burst pressure
test. An additional heat exchanger assembly shall be subjected to the burst pressure
test specified in 4.6.3.
4.4.2 First article test report. After the contractor completes the first
article test, a first article test report shall be prepared.
4.4.3 First article test sample submission. Along with the first article test
report, the contractor shall supply the sample unit to the contracting activity upon
request in contracting document.
4.4.4 First article tests. The first article tests shall consist of all tests
described under 4.6.
4.5 Quality conformance tests. Quality conformance testing shall consist of the
individual tests described under 4.5.1.
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