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Material deterioration prevention and control |
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|  MIL-T-425J
specification, however, shall supersede applicable laws and regulations unless a specific exemption
has been obtained.
3. REQUIREMENTS
3.1 Description. The steel pipeline section (hereinafter called "pipeline section") shall consist
of a thin wall pipe with a grooved nipple welded at each end as shown in figure 1.
3.2 First article. Unless otherwise specified (see 6.2), a sample shall be subjected to first
article inspection (see 4.3 and 6.3). Any changes or deviations of pipeline sections from the
approved first article during production will be subject to the approval of the contracting officer.
Approval of the first article will not relieve the contractor's obligation to furnish pipeline sections
conforming to this specification.
3.3 Material. Material shall be as specified herein. Materials not specified shall be selected
by the contractor and shall be subject to all provisions of this specification.
3.3.1 Thin wall pipe. Steel used for pipeline section shall be as specified in API-SPEC 5L,
grade B, except that the wall thickness shall be as shown in figure 1.
3.3.2 Nipples. Steel used for fabricating nipples shall be standard weight, plain end line pipe
as specified in API-SPEC 5L, grade B. The wall thickness the nipple shall be as shown in
figure 1.
3.3.3 Welding electrodes. Welding electrode shall be as specified in AWS A5.1, type, class,
and size to suit the application.
3.3.4 Material deterioration prevention and control. The pipeline sections shall be fabricated
from compatible materials, inherently corrosion resistant or treated to provide protection against
the various forms of corrosion and deterioration that may be encountered in any of the applicable
operation and storage environments to which the item may be exposed.
3.3.5 Dissimilar metals. Dissimilar metals in contact with each other shall be protected
against galvanic corrosion. Dissimilar metals and methods of protection are defined and detailed
in MIL-STD-889.
3.3.6 Recovered materials. For the purpose of this requirement, recovered materials are
those materials which have been collected from solid waste and reprocessed to become a source
of raw materials, as distinguished from virgin raw materials. The components, pieces and parts
incorporated in the pipeline section may be newly fabricated from recovered materials to the
maximum extent practicable, provided the pipeline section produced meets all other requirements
4
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