Showing papers on "Volume of fluid method published in 1969"

Non-destructive testing method

Abstract: A METHOD FOR TESTING PRESSURE VESSELS BY THE "DIRECT EXPANSION" METHOD IS PROVIDED. IN THIS METHOD A GRAPHIC RECORD OF PRESSURE AND VOLUME IS MADE DURING THE INTRODUCTION OF THE PRESSURIZING FLUID. THE RISE IN PRESSURE IS A FUNCTION OF THE VOLUME OF FLUID INTRODUCED. IN TURN, THE STRESS TO STRAIN RELATIONSHIP OF VESSEL MATERIAL IS PROPORTIONAL RESPECTIVELY TO THE PRESSURE AND VOLUME INJECTED UP TO THE ELASTIC LIMIT. THE INTRODUCTION OF THE FLUID IS TERMINATED TEMPORARILY BEFORE THE PROPORTIONAL (LINEAR ELASTIC) LIMIT OF THE MATERIAL COMPRISING THE VESSEL IS REACHED. A REFERENCE LINE IS THEN DRAWN ON THE GRAPH PARAL- LEL TO THE LINEAR PORTION OF THE PREVIOUS GRAPHIC RECORD EXTENDING BEYOND THE TEMPORARY TERMINATION POINT, AND OFFSET A DISTANCE CALCULABLE TO THE PERMISSIBLE PERMANENT EXPANSION SPECIFIED FOR THE TEST. SUBSEQUENTLY, THE INTRODUCTION OF THE FLUID IS STARTED AGAIN AND THE TEST TERMINATED WHEN THE GRAPHIC PLOT OF PRESSURE VERSUS VOLUME INTERSECTS THE REFERENCE LINE OR WHEN INTERSECTION APPEARS IMMINENT. ACCORDING TO THIS METHOD, THE VESSEL TESTING IS NON-DESTRUCTIVE AND SAFER.

High-pressure sampling valve

Abstract: A high-pressure sampling valve for use in transferring a precise volume of sample fluid into a carrier stream of fluid without interrupting the flow of either stream and includes a housing and a rod movably mounted in a circular channel passing through the housing. Three seals forming leaktight seals between the rod and the housing are provided, one located at each end of the housing and one located between the two fluid channels. The rod has at least two passages passing through it, aligned with two fluid channels in the housing, and a diameter such as to provide clearance between the rod and the housing in the region of the fluid channels so that fluid will leak around the rod and dead heading the valve will be avoided. An actuator is provided to move the rod so that the passage in the rod aligned with one of the fluid channels can be aligned with the other fluid channel. By moving the rod, the volume of fluid contained in that passage of the rod aligned with the first fluid channel can be transferred to the stream of fluid passing through the second fluid channel.