MIL-DTL-26666G
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.5).
b. Conformance inspection (see 4.6).
4.2 Inspection conditions. Unless otherwise specified, all inspections shall be performed in
accordance with the test conditions specified in the applicable test method referenced in the test
procedures.
4.2.1 Temperature and pressure. Unless otherwise specified, tests shall be conducted at local
ambient temperature and barometric pressure. The temperature and barometric pressure shall be
recorded at the time of inspection. This information shall be available for computation of test data, where
required to normal temperature and pressure conditions. Normal temperature and pressure conditions
are 29.92 inches (759.97 mm) of mercury (101.3 kPa) and 70°F (21.1°C). Test instruments shall be
calibrated or adjusted according to their required usage in conducting tests.
4.2.2 Gas. Unless otherwise specified, the gas used for testing, purging or drying the hose
assemblies shall be clean, dry, oil-free air or nitrogen having a dew point at 0 psig of not more than 30°F
(-1.11°C) and contain not more than 3 parts per million (ppm) by volume of total hydrocarbons expressed
as methane equivalent.
4.2.3 Test fluid. Unless otherwise specified, the fluid used for testing, cleaning and flushing the hose
assembly shall be clean, grease free, demineralized water having a specific resistance of not less than
50,000 ohms and shall not have suspended or dissolved impurities exceeding 50 ppm.
4.3 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities
of sufficient accuracy, quality and quantity to permit performance of the required inspection shall be used.
4.3.1 Pressures. Pressures and pressure differentials shall be measured by means of Bourdon-type
gages or other pressure sensing device. The pressure gage shall have an accuracy of one percent of
scale reading.
4.3.2 Temperatures. Temperatures shall be measured by appropriately located thermometers or
thermocouples used with calibrated potentiometers. The thermometers or thermocouples shall have
accuracy within ±2°F (1.11°C).
4.4 Responsibility for compliance. All items shall meet all requirements of sections 3, 4, 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 ensuring that all products or supplies submitted to the Government for
acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing
operations, is an acceptable practice to ascertain conformance to requirements, however, this does not
authorize submission of known defective material, either indicated or actual, nor does it commit the
Government to accept defective material.
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