UNM Union de Normalisation de la Mecanigue EN 13445 "Unfired pressure vessels" Background to the rules in Part 3 Design Editors: Guy BAYLAC Consultant and Technical Advisor to EPERC 114 avenue Felix Faure F-75015 PARIS guy.baylac@wanadoo.fr Danielle KOPLEWICZ Technical Director Union de Normalisation de la Mecanique F-92038 PARIS LA DEFENSE d.koplewicz@unm.fr Issue 2-20 August 2004 AF AQ 1509001 VEIS ON 2900 ☒92038 Paris La Defense cedex 45,rue Louis Blanc 92400 Courbevoie France Site internet .unm.fr Tel.:+33147176767 Fax:+33147176799 Introduction The European standard EN 13445 "Unfired pressure vessels"provides a precedent in that after 10 years of discussion between experts,a European consensus was achieved in the field of pressure equipment.Part 3 which was prepared by a group of leading European experts under the guidance of Dr.Fernando LIDONNICI,Sant'Ambrogio,(Milano,Italy), represents a major advance in European technical convergence.The adoption of the first issue of EN 13445 in May 2002 was the first step of a continuous process for development improvement. This new standard benefits from the contribution of all the European expertise;as such,it includes innovative capa...