Technical Reports

Review of Proposed Specifications Relating to the Shipment of Ethylene in Tank Cars at Cryogenic Temperatures

  • 01
  • Sep
  • 1974
AUTHOR: F. A. Vassalo, D. E. Adams, W. A. Bullerdiek
OFFICE: RPD
REPORT NUMBER: FRA-OR&D 75-41
SUBJECT: Hazardous Materials
KEYWORDS: Liquefied Petroleum Gases, Cryogenics, Shipping Regulations
ABSTRACT: This report reviews proposed specifications and shipper regulations for 113 series tank cars for transporting liquid ethylene at cryogenic temperatures. The study was limited in scope and was to be directed primarily at the holding time requirements necessary for safe shipment of the commodity. The insulation requirements based on a 30-day holding time capability with a design margin of 15 days are considered responsive to needs and are reasonable and practical within the current state of the art. A further definition of conditions for heat transfer calculations and measurement are suggested to assure consistent design and performance. Apparent deficiencies are noted in the proposed in-transit pressure rise specification; a candidate modification is described.
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