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|  MIL-P-17840C(SH)
Materials. - Continued
TABLE V.
ASTM publication
Specification
Material
Application
B 164, UNS N04400
QQ-N-281, class A
Nickel-copper alloy
Impeller nuts,
or N04405
or B
washers, and
keys
------ ------ ----
HH-P-46
Asbestos, sheet,
Casing gaskets
compressed
---- -- - -- - -- - - - -
w-N-288
Nickel-copper alloy
Seal internals
------ ------ ---
A 744, grade CN-
Highly-alloyed
7M or CN-7MS
corrosion resist-
I
ing steel
W-N-281
Nickel-copper alloy
Cyclone separ-
-- - --- - - -- ------
QQ-N-288
ators
-- ---- - - - -- - - - - -
MIL-T-16420 (70-30)
Copper-nickel alloy
Tubing and
class 700
nipple
B 164, UNS N04400
QQ-N-281, class A
Nickel-copper-alloy
Fittings,
or N04405
or B
silver brazing
O-ring face
-- - -- -- ---- - - --
seal type --/
1
MIL-C-15726 (70-30)
Copper-nickel alloy
(70-30)
-- -- -- - - - - - --- --
MIL-C-15726 (70-30)
Copper-nickel alloy
Flanges (gauge
(70-30)
and vent
connections)
,
Mechanical flareless (bite), compression, or flared type fittings are not
permitted.
Wearing rings and opposing surfaces shall be of dissimlar material or
shall have a difference in hardness of at least 50 Brinell hardness number
(Bhn).
The Ni-Cu-A1 material shall be annealed prior to age hardening.
3.3.9 Part interchangeability. All parts for pumps manufactured to the
same drawings shall be interchangeable.
3.3.9.1 Pumps of a given capacity In gal/rein and total dynamic head in
feet and type of electrical voltage shall be interchangeable in mounting
dimensions, size and location of piping connections, shaft extension, shaft
sleeve, and flinger.
21
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