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## Lifting Lug – WRC Calculation

Introduction: All directly welded parts to the pressure vessel like lifting lugs, support lug, trunnion etc. need to be checked for WRC 107/537. All related calculations are carried out in PV Elite once given proper inputs. In some cases, it is not possible to build such directly welded parts in PV Elite due to software constrain. For example, adding lifting…

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## Flange Evaluation as per ASME B16.5 Pressure-Temperature Rating

Standard flanges for the nozzles is having strength identification by a dimensionless number which we called as a class. Class, followed by a dimensionless number, is the designated icon for pressure-temperature ratings: For Example:  Class   150   300   400   600   900   1500   2500 Pressure-temperature ratings are maximum allowable working pressures in bar units at the temperatures in degrees Celsius shown in…

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## Agitator Design

Introduction: Mixing of fluids is necessary for many chemical processes. It may include mixing of liquid with liquid, gas with a liquid, or solids with liquid. Mixing is accomplished by the rotating action of an impeller in the continuous fluid. Type of fluid and its physical state, the degree of agitation and geometry of vessel makes an important role for…

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## Pressure vessel hydrostatic test requirements and implications on design

For hydro test as per ASME code manufacturer of the equipment must follow ASME Boiler and Pressure Vessel Code Section VIII DIV.1 (Rules for Construction of Pressure Vessels), UG-99. We will discuss hydro test requirement in this discussion. Requirements as per ASME Boiler and Pressure Vessel Code Section VIII DIV.1 (Rules for Construction of Pressure Vessels), UG-99 - Before hydro test…

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## Perfecting Expansion Bellow Design for your Heat Exchanger

Spring Rate Calculation for Expansion Bellow Expansion bellows are applicable to fixed tube sheet heat exchanger which help in reducing the longitudinal stresses or tube to tube sheet joint loads by allowing the axial displacement between shell and tubes. RCB-8 flexible Shell Elements (FSE) of TEMA standards deals with the calculation of spring rate and stresses induced in the FSE…