MIL-DTL-13531J
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
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 17025 and NCSL Z540.3 as applicable.
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.
4.4.1 Assembly distributor. All manufacturing and/or assembling locations must be qualified for listing
on, or approved for listing on, the applicable qualified products list by the qualifying activity. This includes
manufacturing sites for the bulk hose and sites for assembling hose and fittings, regardless of whether
the site is operated by the original manufacturer or an authorized distributor producing hose assemblies.
4.5 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to
the qualifying activity on sample units produced with equipment and procedures used in production.
Qualification inspection shall be performed on type I, type II, and type III hose and hose assemblies.
Each nominal hose size (ID) shall be qualified individually.
4.5.1 Samples for qualification. Samples for qualification shall be representative of the products
proposed to be furnished to the Government. Samples shall be of one type and nominal size of hose
and shall be of the quantity and length specified in the applicable test method.
4.5.1.1 Test specimen aging. Impulse pressure and low temperature flexibility test specimens to be
aged shall consist of four untested hose assemblies. Each test specimen shall be filled with hydraulic
fluid in accordance with MIL-PRF-5606, MIL-PRF-6083 or MIL-PRF-83282 and plugged at one end. The
specimens shall be hung in an ambient air temperature of +250°F ±5°F (121.11°C ±2.77°C) for 24 hours
±1/2 hour. Following this heating, the specimens shall be allowed to cool to room temperature and the
oil shall be drained.
4.5.2 Qualification inspection routine. All samples shall be subjected to qualification testing in table V
the sequence is at the manufacturer's discretion.
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