MIL-DTL-26521L
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. First article inspection (see 4.4.).
b. Conformance inspection (see 4.5).
4.2 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
established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment shall be in accordance with
ISO/EIC 17025 and NCSL Z540.3 as applicable.
4.3 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.
4.3.1 Lot records. Manufacturers shall keep lot records for 3 years minimum. Manufacturers shall
monitor for compliance to the prescribed procedures, and observe that satisfactory manufacturing
conditions and records on lots are maintained for these hose assemblies. The records, including as a
minimum an attributes summary of all quality conformance inspections conducted on each lot, shall be
available to review by customers at all times.
4.4 First article inspection. The first article inspection shall be performed at a laboratory acceptable
to the acquiring activity on sample units produced with equipment and procedures used in production.
4.4.1 First article samples. The first article samples shall be representative of the products proposed
to be furnished to the Government. The samples shall consist of the following hose lengths for each hose
size.
a. All samples shall be prepared as specified in ASTM D3182 and ASTM D3183.
b. 12 inch (305 mm) length uncoupled - For adhesion tests (see 4.6.3.8).
c. 36 inch (914 mm) length with couplings - For working pressure test (see 4.6.3.3), proof
d. 50 foot (1270 mm) length with couplings - For collapsibility test (see 4.6.3.9) and durability test
(see 4.6.3.10).
4.4.2 Inspection routine. First article inspection shall consist of the inspections specified in table IV,
except where otherwise noted (see 6.4). The test sequence shall be determined by the manufacturer
unless otherwise specified.
4.4.2.1 Waivers or deviations to specification requirements. Waivers or deviations to specification
requirements shall be coordinated through the preparing activity; DLA Land Maritime, Attn: VAI, P.O. Box
3990, Columbus, OH 43218-3990, or emailed to Fluidflow@dscc.dla.mil.
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