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Test Procedures cont'd
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DOE Standard Respiratory Acceptance Program for Supplied
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Test Procedure - doe-std-1167-20030023


DOE-STD-1167-2003
13.0
Test for Crush Resistance of Breathing Air Hose
(Does not apply to hoses that cannot be crushed during use, i.e., hoses within the envelope of the supplied-air suit)
13.1
Test Equipment and Requirements
13.1.1 In a test carried out to determine the crush resistance of the breathing air
hose, the reduction in the flow of air through the hose is measured when a
crushing force is applied to the hose.
13.1.2 The breathing air hose should be connected to a source of air, and a calibrated
airflow-measuring instrument should be used to monitor the rate of flow of
air through the hose. The rate of flow of air through the breathing air hose
should be adjusted to the minimum value specified by the DOE contractor.
13.1.3 The breathing air hose should rest on a horizontal surface. A crushing force
of 250 lb should be applied to the hose along 3 in. of its length for 300 sec (5
min).
13.2
Test Procedure
13.2.1 The airflow rate through the breathing air hose during the application of the
crushing force should be observed. The lowest value of the airflow rate
through the hose should be recorded. The maximum decrease in the rate of
airflow through the hose should be calculated and recorded.
13.2.2 After removal of the crushing force from the breathing air hose, the condition
of the section of the hose where the crushing force had been applied should
be examined, and record should be made of any permanent deformation of
the hose.
13.2.3 The breathing air hose should be acceptable in regard to crush resistance if the
lowest rate of airflow through the hose during the application of the crushing
force is not less than 90 percent of the original rate of airflow through the
hose and if permanent deformation of the hose does not occur because of the
application of the crushing force. In addition, after removal of the crush
force, airflow must return to at least 95 percent of the original rate.
14.0
Test for Kink Resistance of Breathing Air Hose
(Does not apply to hoses that cannot be kinked during use, i.e., hoses within the envelope of the supplied-air suit)
14.1
Test Equipment and Requirements
14.1.1 In tests carried out to determine the resistance to kinking of the breathing air
hose, the reduction in the flow of air through the hose should be measured
and must not be less than 90 percent of the original airflow.
14.1.2 The breathing air hose should be connected to a source of air, and a calibrated
airflow-measuring instrument should be used to monitor the rate of airflow
through the hose.
14.1.3 The rate of airflow through the breathing air hose should be adjusted to the
minimum value specified by the DOE contractor.
16


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