MIL-DTL-13444H
NCSL INTERNATIONAL
NCSL Z540-1
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Calibration Laboratories and Measuring and Test Equipment,
General Requirements
(Copies of these documents are available online at https://www.ncsli.org or from NCSL International
2995 Wilderness Place, Suite 107 Boulder, Colorado 80301-5404.)
2.4 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein, (except for related specification sheets), the text of this document takes
precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a
specific exemption has been obtained.
3. REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and in
accordance with the applicable specification sheet. In the event of any conflict between the
requirements of this specification and the specification sheet, the latter shall govern.
3.2 Qualification. The hose and hose assemblies furnished under this specification shall be products
that are manufactured by a manufacturer authorized by the qualifying activity for listing on the applicable
3.3 Materials. Materials shall be as identified herein or as approved by the qualifying activity.
However, when a definite material is not specified, a material shall be used which will enable the hose of
hose assembly to meet the requirements of this specification. Acceptance or approval of any constituent
material shall not be construed as a guarantee of acceptance of the finished product.
3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically
advantageous life cycle cost.
3.4 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection
against electrolysis and corrosion shall be provided. Dissimilar metals such as brass, copper or steel
(except corrosion-resisting steel passivated in accordance with SAE-AMS-2700) shall not be used in
intimate contact with aluminum or aluminum alloy. Protective measures for dissimilar metals shall be in
accordance with MIL-STD-889.
3.5 Construction.
3.5.1 Hose. Hose shall be constructed of a seamless, smooth bore tube of flexible material,
reinforcement, and an outer cover.
3.5.1.1 Hose outer cover.
3.5.1.1.1 Type I hose. The type I hose outer cover shall be compounded from polychloroprene.
3.5.1.1.2 Type III hose. The type III hose outer cover shall consist of oil resistant, rubber impregnated
fabric.
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