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MIL-T-425J
Contractors who only make horizontal welds need not qualify welders or welding operators for
"all position welding". The contractor shall be responsible for determining that automatic
welding equipment operators are capable of producing quality welds in accordance with AWS and
ASME codes. The certification shall be made available for review by the contracting officer or
contracting officer's representative.
3.6 Dimensions. The dimensions of the pipeline sections shall be as shown in figure 1.
3.7 Identification marking. Each pipeline section shall be identified and marked in accordance
with MIL-STD-130 and shall include the part or identifying number (see 6.4).
3.8 Treatment and exterior coating. All exterior surfaces of pipeline sections shall be cleaned,
treated and painted in accordance with MIL-T-704, type F. Unless otherwise specified (see 6.2)
the top coat color shall be camouflage green 383 conforming to MIL-C-46168.
3.8.1 Asphalt varnish. If asphalt varnish coating is specified (see 6.2), the exterior surfaces of
pipeline sections shall then be coated with black asphalt varnish conforming to TT-V-51.
3.9 Coating, interior surface. The interior surfaces of each pipeline section shall be
thoroughly cleaned of all harmful dirt, rust, scale and foreign matter. Unless otherwise specified
(see 6.2), the inside surfaces of all pipeline sections shall be given mill coating with a film of oil
for protection against rusting in transit.
3.10 Workmanship. The land-sealing surface of the nipples shall have all indentations,
projections, and imperfections removed to the extent that the resulting surface shall have a
roughness height rating of not more than 500 microinches as specified in ANSI B46.1. The
nipples shall not be out of round by more than 1 percent of the outside diameter. The pipeline
sections shall have no circumferential welds other than those required for joining the nipples to the
tube.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase
order, the contractor is responsible for the performance of all inspection requirements as specified
herein. Except as otherwise specified in the contract or purchase order, and unless disapproved
by the Government, the contractor's own or any other facilities suitable for the performance of the
inspection requirements specified herein, may be used. The Government reserves the right to
perform any of the inspections set forth in the specification where such inspections are deemed
necessary to assure supplies and services conform to prescribed requirements.
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