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Ped guide A PROCESS ENGINEER ? S GUIDE TO THE PRESSURE EQUIPMENT DIRECTIVE Simon Learman Blackmonk Engineering Ltd www blackmonk co uk nd April Copyright ? Blackmonk Engineering Ltd CBlackmonk Engineering Ltd www blackmonk co uk Contents Contents Preface

A PROCESS ENGINEER ? S GUIDE TO THE PRESSURE EQUIPMENT DIRECTIVE Simon Learman Blackmonk Engineering Ltd www blackmonk co uk nd April Copyright ? Blackmonk Engineering Ltd CBlackmonk Engineering Ltd www blackmonk co uk Contents Contents Preface Introduction Process Engineers the PED Determining the Hazard Category Equipment Excluded From the PED Types of Pressure Equipment Fluid State Fluid Group Classi ?cation Charts Determine the Maximum Allowable Pressure De ?ning Dimension Determine the PED Hazard Category Conformity Assessment Examples References PED Classi ?cation Flowchart CBlackmonk Engineering Ltd www blackmonk co uk Preface Thank you for reading this guide I hope that it will give you a clear introduction to the Pressure Equipment Directive and be of help to you in your work I would appreciate any feedback you have ?? good or bad Let me know what you ?nd useful what could be improved and what else you would ?nd helpful in future Email info blackmonk co uk Best regards Simon Learman Blackmonk Engineering Ltd www blackmonk co uk CBlackmonk Engineering Ltd www blackmonk co uk Introduction The Pressure Equipment Directive PED is a European Union Directive applicable to the design manufacture and conformity assessment of pressure equipment and assemblies of pressure equipment with a maximum allowable pressure greater than barg The basic purpose of the PED is to ensure that pressure equipment used in the European Economic Area EEA is safe Additionally because the requirements of the Directive are common to all states within the EEA all equipment complying with the PED may be sold and used anywhere within the EEA This promotes the free movement of goods within the EEA Within the UK the Pressure Equipment Regulations PER and subsequent amendments implement the European Union Pressure Equipment Directive Failure to comply with the Pressure Equipment Regulations is illegal and can result in prosecution and penalties on conviction of a ?ne imprisonment or both Process Engineers the PED Design of pressure equipment and pressure systems in the process industries inevitably involves process engineers Given that all relevant equipment plant and systems in the EEA must comply with the PED it is essential that process engineers have at least a basic understanding of the requirements of the Directive Essentially the PED requires the level of hazard of pressure equipment to be assessed and classi ?ed into of categories The categories are SEP Sound engineering practice Category I Category II Category III Category IV Increasing level of hazard The higher the level of hazard the more extensive the level of quality assurance required during the design manufacture and testing of the equipment It is generally the process engineer ? s responsibility to determine the hazard category of each particular equipment item and system The European Economic Area consists of the member states of the European Union plus Iceland Norway and Liechtenstein CBlackmonk Engineering Ltd www blackmonk co uk Determining the Hazard Category In order to classify pressure equipment correctly the process engineer must follow the methodology stated in the PED This methodology