MIL-PRF-20042E
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
ASTM B61
- Standard Specification for Steam or Valve
Bronze Castings. (DoD adopted)
ASTM B271
- Standard Specification for Copper-Base Alloy
Centrifugal Castings.
ASTM B505
- Standard Specification for Copper-Base Alloy
Continuous Castings.
ASTM B584
- Standard Specification for Copper Alloy Sand
Castings for General Applications.
ASTM E172
- Standard Practice for Describing and
Specifying the Excitation Source in Emission
Spectrochemical Analysis.
ASTM E1282 - Standard Guide for Specifying the Chemical
Compositions and Selecting Sampling Practices
and Quantitative Analysis Methods for Metals
and Alloys.
(Application for copies should be addressed to the American Society for
Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-
2959.)
MANUFACTURERS STANDARDIZATION SOCIETY (MSS)
MSS SP-9 - Spot Facing for Bronze, Iron and Steel Flanges.
(Application for copies should be addressed to the Manufacturers
Standardization Society, 127 Park Street, NE, Vienna, VA 22180-4602.)
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
associated specifications or 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 Chemical composition. Unless otherwise specified (see 6.2), the
chemical composition of flanges shall be as specified in ASTM B61, or alloys
C92200 or C90300 in accordance with ASTM B271, B505, or
B584.
3.2 Recycled/recovered materials. Unless otherwise specified herein,
all equipment, material, and articles incorporated in the products covered by
this specification shall be new and shall be fabricated using materials
produced from recycled/recovered materials to the maximum extent practicable
without jeopardizing the intended use. The term "recycled/recovered
materials" means materials which have been collected or recovered from solid
waste and reprocessed to become a source of raw materials, as opposed to
virgin raw materials. None of the above shall be interpreted to mean that the
use of used or rebuilt products is allowed under this specification unless
otherwise specifically specified.
3.3
Type PR, with groove for preinserted rings of silver brazing alloy.
3.3.1 Type PR flanges are grooved for preinsert rings of silver brazing
alloy. The insert rings shall not be installed in the flange groove by the
contractor. These flanges may be supplied without the silver brazing rings,
in which case they shall be ordered separately, or with the rings separately
packaged and furnished with the parent component for installation in the
groove prior to brazing (see 6.2). The preinserted silver brazing rings shall
be of a design to fill the groove shown on figure 1, the minimum internal
3
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