Cargo Tanks,Bottom Loading of Flammable Liquids. Volume II. Review and Analysis of Liquid Level Control Systems Used in Bottom Loading of Flammable Liquids into Cargo Tanks.

摘要

Bottom loading systems of flammable liquids into cargo tanks are investigated with two overall objectives: (1) Review the mechanical aspects of bottom loading of cargo tanks with regard to devices or procedures for removing liquid products from loading lines under tanks and protection of loading lines from underride accidents; (2) Review liquid level sensing systems presently available,with special emphasis placed on:safety characteristics,compatibility and adaptability of systems used as they differ from tank vehicle to loading terminal,failsafe features built into the systems,and longevity of these systems with a view to possible retest criteria. The volume summarizes the work performed on the second objective. This includes a review of available design,an analysis of the safety features of each design, a review of existing standards and recommended procedures,and recommended performance criteria.