Posts by: Matteo

Period of vibration of items supported by brackets or rings

In a recent NextGen update, we removed the automatic vibration-time calculation for vessels not supported from the bottom. The vibration period continues to be calculated automatically on items with skirts, legs, etc. The calculation of the vibration period is part of the larger seismic calculation and therefore intervenes if the…

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Major fixes available with version 2018.2

Opening reinforcement, ASME VIII Division 1 In version 2018.2 some corrections have been introduced to the calculation of the reinforcement of the openings of Division 1. Some of these corrections can lead to the reduction of the area available for reinforcement, particularly: External corrosion was not considered correctly in previous…

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Run a FEM analysis of a nozzle with NozzlePRO from NextGen

Starting from version 2018.2 of NextGen, thanks to the close collaboration with Paulin Research Group, it is possible to perform an FEM finite element analysis of a nozzle directly from the Sant’Ambrogio software. This analysis is performed by NozzlePRO,¬† a software supplied by PRG, to be installed apart from NextGen;…

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How to design a gas cylinder with NextGen

Gas cylinders are usually designed according to ISO 9809. This code, however, doesn’t cover some rules to design and validate openings or fatigue: in these cases, it is necessary to integrate the calculation with a separate validation using a pressure equipment code like EN 13445 or AD 2000; this is…

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How to design a stiffening ring against external pressure using NextGen

January 2019 update: stiffening rings definition is vastly improved and simplified with NextGen version 2019. The following article¬†applies to versions up to 2018.3. Stiffening rings (or stiffener ring, stiffeners) are components positioned externally or internally to prevent collapse under external pressure load. Rings are considered “effective reinforcements” and contribute reducing…

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