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MIL-K-687E
4.5.2.7.1 Failure criteria. Weld failure or permanent deformation caused by
lifting or failure to meet the requirements of MIL-STD-209, shall constitute
failure of this test.
4.5.2.8 Test procedures of tiedown provisions. With the kettle anchored by
the tiedown attachments, apply static loads as specified (see 3.11.2) to each
attachment. Hold each applied force for a minimum of 90 seconds.
4.5.2.8.1 Failure criteria. Weld failure or permanent deformation of the
kettle or its tiedown attachments or damage to any tiedown cable shall
constitute failure of this test.
4.5.2.9 Railroad humping. When the rail hump test is specified (see 6.2)
anchor the empty kettle on a domestic service standard railway flat car.
Blocking shall be as specified by the kettle manufacturer. Hump the car, with
the kettle tied down, at a speed of not less than 8 mph against two standing
rail road cars with their brakes set. The kettle shall face in the direction of
the two cars. Repeat the procedure with the rear of the kettle in the direction
of the two cars. The kettle may be reversed by either reloading it in the proper
direction on the flat car or by reversing the direction of the flat car. Once
the test has begun, there will be no readjustment of load, or any reconditioning
of the blocks, chocking material or tiedowns except to reverse direction of the
kettle. After each impact, the kettle and tiedown shall be inspected to
determine permanent deformation to components of the kettle, or other evidence
of possible failure. After completion of the railroad impact test, an
of the kettle will be conducted.
The operational checkout
shall include heating, circulating and spraying asphalt cement.
4.5.2.9.1 Failure criteria. Weld failure, or permanent deformation to the
components of the kettle or its tiedown attachments or damage to any tiedown
cable or stopping of a test due to impending failure and possible damage to the
kettle, or failure of the kettle to operate after the test shall constitute
failure of the test.
4.5.2.10 Road. Fill the melting tank to capacity with asphalt cement and
fill the burner fuel tank to capacity with fuel. Couple the kettle to the
towing vehicle specified herein and perform the road test specified in table IV.
TABLE IV. Road test.
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Mileage and Speed
Course
100 miles at variable speeds up to
Primary highway
45 mph.
100 miles at variable speeds up to
Secondary road
25 mph.
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