A Compilation of Properties, Handling and Testing Procedures, Compatibility with Materials, and Behavior at Low Temperatures

摘要

This report summarizes (1) our experience with and the available technical information on the development of two prototype valves, one for a cryogenic gas service and the other for a cryogenic liquid service these valves are under development by Parker Aircraft Co. for a Government agency; (2) bibliographical information on the physical and mechanical properties of specific construction materials for a temperature range of -420°F to +200°F (these materials include some austenitic stainless steels and Teflon plastics); (3) the thermo¬dynamic properties of helium, hydrogen, and nitrogen fluids with which the valves may be used or tested; (4) the hazards associated with the transportation and storage of hydrogen and with its use for testing the prototype valves for leakage across the seats; and (5) the sources and availability of hydrogen, and the Los Angeles regulations that apply to its transportation and use.