Design of Inspection Method for Control of Gap Dimension Between Reinforcing Ring and Vessel’s Surface

Abstract

Discrepancy between real connecting pipe’s unit’s characteristics and unit’s quality rating on base vessel’s nozzle’s reinforcing method analysis is shown. The most common misfit is the dimension of gap between reinforcing ring and vessel’s surface. Nowadays gap’s inspection methods, which are based on taking measurement of gap in one point via signal’s nozzle does not allow to estimate the quality of producing by all the contact surface. For reasoning the currency of new connecting pipe’s gap’s inspection method development finite-element method’s modeling of unit’s stress mode was done. Authors suggested as an alternating inspection method to produce reinforcing rings with two signal nozzles, which allows to estimate gap’s dimension in several points and to increase the objectivity of inspection. Stress mode modeling of reinforcing ring with two nozzles was done. Analysis of modeling results showed, that for inspection gap’s dimension between connecting pipe and vessel inspection method with two nozzles could be used. That allows to take measurement of gap’s dimension in the most loaded areas of vessel.