MIL-C-0052980C(ME)
tabulating all appropriate test data and observations.
Safety and
human factor considerations shall be evaluated throughout testing.
4.5.2.2 Air receiver tank.
The air receiver tank for the
compressor shall be tested in accordance with the ASME Boiler and
Pressure Vessel Code, section VIII.
Failure of any ASME tests shall
constitute failure of this test.
Presence of the ASME official code
U-symbol stamped or marked on the receiver and the furnishing of a
copy of the ASME data sheet (Form U-1) may be accepted as evidence
that the receiver conforms to the ASME Boiler and Pressure Vessel
Code.
For the class 2 compressor (when furnished with an air
receiver tank with an inside diameter of 6 inches or less and which
is not within the jurisdiction of ASME Boiler and Pressure Vessel
Code) expose the air receiver tank, exclusive of pressure gauges
plus safety relief devices, to a hydrostatic pressure of 300 psig,
and hold at that pressure until examined for leaks and distortion.
Any evidence of leakage or permanent distortion shall constitute
failure of this test.
4.5.2.3 Power consumption.
Drive the compressor by a dynamometer
or calibrated motor and determine the brake horsepower and speed
required to deliver minimum capacity at maximum operating pressure
as specified in table I.
The occurrence of one of the following
shall constitute failure of this test:
a.
Size 5 cfm compressor, with Government-furnished engine,
requiring more than 1.5 continuous brake horsepower at an
engine speed of 3600 rpm.
Size 15 cfm compressor, with Government-furnished engine,
b.
requiring more than 6 continuous brake horsepower at an engine
speed of 3600 rpm.
Size 5, 15 and 25 cfm compressors for commercial engines,
c.
horsepower and speed required for operation of compressor in
excess of the continuous brake horsepower rating for
applicable speed as recommended by the engine manufacturer.
4.5.2.4 Capacity and Performance.
The compressor capacity shall
be determined in accordance with the method specified in the ASME
Performance Test Code 9.
This test shall be performed in
conjunction with and simultaneously with the endurance test (see
4.5.2.5).
The air-discharge temperature shall be determined when
the compressor is operating at minimum capacity at maximum discharge
pressure. Any one of the following conditions shall constitute
failure of this test:
Discharge air pressure less than 175 psig.
Discharge air temperature in excess of ambient +100 °F.
Free-air capacity less than that specified in table I.
Operate the compressor for not less than
4.5.2.5 Endurance.
500 hours continually in periods of not less than 8 hours of running
For this test, an auxiliary fuel supply system may be used to
time.
If an auxiliary
permit operation for 8 hours without refueling.
fuel system is not used, periods of non-operation of not more than a
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