Editorials

Requirements of Clause 7-Annex I of Directive 2014/68/EU

This clause contains specific requirements for pressure equipment that have been considered on all harmonized standards of Directive 2014/68/EU, generally known as the Pressure Equipment Directive. It comes from a compromise solution found during the preparation of the first Pressure Equipment Directive 97/23/EC, of which the subject directive 2014/68/EU is…

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The world of Pressure Equipment – The novelties of 2019

This year it was particularly rich in news for anyone working with European, American and also Italian standards: there is a lot of movement, we will try to explain why and analyze the consequences. The harmonized Unfired Pressure Vessel standard EN 13445. During 2018 several amendments of part 3 (Design…

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Working for the European standards: is it worth while doing it?

I started working as a pressure vessel designer about 50 years ago. As all the young engineers, at that time I had no ideas about the work needed for the preparation and maintenance of Pressure Vessel safety standards: I simply knew that different standards, laws and regulations existed in the…

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What will be the future of the new flange calculation methods?

About 50 years ago, when the main pressure vessel standards were composed only by a few pages, and the sliding rule was the only available tool for the pressure vessel designer, the Taylor Forge method for the calculation of flanges was regarded as a very advanced and sophisticated procedure for…

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The calculation of fixed tubesheet exchangers according to ASME Section VIII division1, Clause UHX

Clause UHX of ASME Section VIII division 1 defines the rules for the calculation of tubesheets in shell and tube heat exchangers. This calculation is based on the Gardner’s theory (1948-1952), also considered in Appendix A of the TEMA standards (previously generally used in tubesheet calculations): however Clause UHX of…

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