Technical Reports

Evaluation of the Thermal Effectiveness of Urethane Foam and Fiberglass as Insulation Systems for Tank Cars

A total of 39 thermal fire tests were conducted using the torch fire facility for the Federal Railroad Administration. These tests were performed in accordance with the procedures presented in Title 49, Code of Federal Regulations, Part 179, 105-4. The insulation tested were urethane foam and...

Puncture Resistance of Scale Mode Aluminum Tank Car Heads

Fire Tests on Insulation for Aluminum Tank Cars : An evaluation of fiber glass, ceramic fiber, and mineral fiber materials in torch-fire and pool-fire environments

Tests were conducted at the Transportation Test Center to determine the vulnerability to fire of aluminum tank cars designed to transport hazardous materials under pressure when the aluminum was protected by three types of insulation. Glass, mineral, and ceramic fiber blankets, each covering a...

Vehicle/Track Interaction Test at Bennington, NH: Revision 1.0

This report describes the results of the Vehicle/Track Interaction tests conducted at Bennington, NH on August 28-31, 1982. The purpose of these tests was to determine the effects of well defined perturbations of track alignment, gage, and crosslevel on rail car response as a function of speed....

Thermal Protection Study of Cryogenic Tank Cars

This study was concerned with the thermal protection capability of insulation systems used on tank cars which are utilized in the transportation of hazardous materials at cryogenic temperatures. The heat sources in question are fires which the tank car may encounter if involved in a railroad...

Ultrasonic Instrumentation to Measure Hoop Stress in Cast-Steel Railroad Wheel Rims

This is Report No. 32 in a series covering research done by hte National Institute of Standards and Technology for the Federal Railroad Administration. We report on a project by the Materials Reliability Division to develop and test an ultrasonic instrument package for measuring residual stress in...

Thermal Insulation Systems Study for the Chlorine Tank Car

A number of therma1 tests were performed on three insulation systems. The purpose was to ascertain if an insulation system consisting of existing materials could prevent the temperature of the shell of a chlorine tank car from exceeding 251°C (483 °F) while the tank car is exposed to...

Determination of Track Lateral Resistance from Lateral Pull Tests

Thermal buckling of railroad tracks in the lateral plane is an important problem in the design and maintenance of continuous welded rail (CWR) track. The severity of the problem is manifested through the number of derailments which are attributable to track buckling, indicating a need for...

An Experimental Investigation of the Discharge of a Flashing Liquid from a Finite Reservoir: A Fundamental Study of the Two-Phase Flow Phenomena Occurring During Venting from Rail Tank Cars

The design of pressure relief valves for railroad tank cars containing pressurized liquid commodities is dependent on knowledge of venting rates during accidents. In turn, development of an appropriate theoretical model requires knowledge of many properties which affect the venting rates of...

Small Scale Impact Simulation Tests

In derailments and switchyard operations, tank cars frequently experience impacts that result in tank car head puncture. From a cost effective viewpoint, it is not practical to conduct many full-scale testing to verify that a particular tank car design will perform satisfactorily in all possible...

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Technical Reports