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Welding, brazing, and soldering |
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|  MIL-P-45051D(AL)
be free from defects which would adversely affect the performance or
maintainability of the individual components or the overall assembly. When
dissimilar metals are used in contact with each other, suitable protection
against galvanic corrosion shall be applied in accordance with MIL-STD-889.
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3.3.2 Reclaimed materials. The contractor is encouraged to use reclaimed
materials for fabricating new parts without jeopardizing the chemical and
physical properties, design integrity, and intent of the materials originally
selected or specified. The reclaimed materials shall have been reprocessed,
remanufactured, or recycled in a manner that shall restore them to the same
chemical composition and physical properties as the materials originally selected
for use. It shall not be permissible to use reclaimed parts as is, or rebuilt
from scrap or other used equipment.
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3.3.3 Interchangeability. Replacement parts shall not require any
modification of the replacement part, other parts or components, higher
assemblies, or the end item for installation. The replacement parts shall provide
the same, or better, form, fit, function and performance as the parts initially
provided in the press. When industry or government standards are applicable,
replacement parts shall conform to those standards.
3.3.4 Castings and forgings. All castings and forgings shall be free from
defects. Strength and other essential physical and chemical properties of the
castings and forgings shall be adequate to meet the performance requirements
specified herein.
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3.3.5 Welding, brazing, and soldering. Welding, brazing, and soldering
shall be of a quality which shall sustain the performance requirements of the
welded, brazed, or soldered part. However, these operations shall not be employed
as repair measures for defective parts.
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3.3.6 Painting. Unless otherwise specified (see 6.2.1), painting and
finishing shall be in accordance with the best commercial practice in the
industry. Before painting, all surfaces shall be clean and be free of all foreign
matter detrimental to painting. At least one coat of primer (or a phosphate or
chromate base) and one coat of enamel, or equivalent (i.e., epoxy enamel), shall
be applied.
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3.3.7 Threads. Threads shall conform to FED-STD-H28 and the applicable
Detailed Standard section referenced therein.
3.4 Performance and product characteristics.
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3.4.1 Hydraulic load. The press shall have a capacity of not less than 12.5
tons. The manually actuated hydraulic pump shall develop sufficient force to
provide a proof load of 16 tons. The hydraulic pump shall be a closed hydraulic
system. The hydraulic system shall require no more than 50 pounds of force, two
inches from the end of the pump handle, applied in the direction of gravity to
develop a force equal to the specified load of 12.5 tons.
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3.4.2 Proof load. The press shall withstand a proof load of 16 tons,
applied for a period of five minutes, without showing visual evidence of leaks,
breaks, creepage, permanent deformation, or loss of pressure.
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