Dear Colleagues, Two items regarding this.....
====================================== In reading through the PED (97/23/EC) I notice the following, apparent contradiction... The text of say Article 3, section 1.1(a) first indent says "for fluids in Group 1 with a volume greater than 1 L and a product of PS and V greater than 25 bar 7L, or with a pressure PS greater than 200 bar (Annex II, table 1)," The confusing bit is the '7L' in '25 bar 7L'. When I look at the graph of table 1 it looks like the limit is the product of pressure and volume exceeding 25 bar * 1L. What is that 7 (seven) all about? It looks like it could be a typo that has crept in. I appears consistently in the text. It shows up in the directive posted in the Commission web site and at a site maintained by Finland. If the seven is taken as written then the limit in my example is 25*7 or 175. But this conflicts with the table 1 graph indicating a limit line of PS * V = 25. Any ideas??? ========================= I have studied the Pressure Equipment Directive tables in Annex II and created a matrix to guide me in the analysis of our equipment. This matrix may be useful to others, so I have attached it. It seems that the only elements of our equipment that cause us to fall within the "constrained" scope of the directive are the gas bottles that are installed by the user and not supplied by us. Removing these bottles from consideration, our equipment would not fall into even the first Category of any of the 9 tables, and so we would be obligated by only Article 3, section 3. It seems to me that since we do not supply the gas bottles with our equipment, we may take this approach, and avoid all of the conformity assessment procedures called out in article 10 section 1.3. I look forward to any comments on this opinion. <<PED analysis.doc>> Best Regards, Lauren Crane Senior Safety and Compliance Engineer Eaton Corporation
PED analysis.doc
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