PED Workshop, Bratislava April 2005 PED and Presumption of Conformity Product Standards for pressure vessels, boilers and piping, and “Horizontal” standards including valves and materials PED and Presumption of Conformity Product Standards for pressure vessels, boilers and piping, and “Horizontal” standards including valves and materials Ed Haynes CEN Consultant Pressure Equipment

Scope and Content  Introduction and links of PED to standards  Achievements and developments  Some standards and Technical Committees  More about links of PED to standards  3 questions … answers?  Useful websites then tables of standards by TC Questions welcome any time

Overview: Standardisation under New Approach Mandate Mandate TC drafts standard[I may assist] TC drafts standard[I may assist] Public enquiry[I must comment] Public enquiry[I must comment] TC considers comments [I must approve] TC considers comments [I must approve] National Standards Bodies (NSBs) vote National Standards Bodies (NSBs) vote CEN / CENELEC / ETSI ratify, advise EC CEN / CENELEC / ETSI ratify, advise EC NSBs transpose and publish NSBs transpose and publish EC publishes references in OJEU. EC publishes references in OJEU.

Guide to implementation of New Approach Directives According to the “Blue” Guide, Directive 98/34 states: Compliance with CEN or CENELEC standards is not compulsory Compliance with CEN or CENELEC standards is not compulsory Conflicting national standards must be withdrawn Conflicting national standards must be withdrawn

PED Recital 16 “WHEREAS …to ease the task of demonstrating compliance with ESRs, standards harmonised at European level are useful…” CEN, CENELEC are recognised as competent to adopt harmonised standards that follow general guidelines…”

Achievements Pressure Vessels EN series Pressure Vessels EN series Boilers EN and series Boilers EN and series Industrial piping EN series Industrial piping EN series Help desks for these product standards Help desks for these product standards Materials standards Materials standards

Developments  GRP tanks and vessels  aluminium pressure vessels  aluminium, copper and cast iron materials  equipment for fuels (LPG)  cryogenics, refrigeration systems  assemblies

Pressure Equipment Directive Article 5 (2) “Pressure equipment and assemblies which conform to the national standards transposing the harmonised standards published in the OJ shall be presumed to conform to the essential requirements…”

Differentiators Presumption of Conformity is one major differentiator from use of European standards Presumption of Conformity is one major differentiator from use of European standards Others include Latest technical experience Latest technical experience Breadth of background (EU Expansion) Breadth of background (EU Expansion) Close partnership of material and design codes Close partnership of material and design codes

Standards-making Standards elaborating the PED Essential Safety Requirements are: Precise using known and respected data Precise using known and respected data Allow flexibility but avoid compromise through stating generalities Allow flexibility but avoid compromise through stating generalities Add value Add value Acceptable to the Mandate Acceptable to the Mandate These standards are made for the Directive

Foreword in standards Standards which are candidates for citation in the Official Journal state: “For relationship with EU Directive(s), see informative Annex Z, which is an integral part of this document”

PED Annex Z “Once this standard is cited in the OJ under [the] Directive and [it] has been implemented as a national standard in at least one Member State, compliance with the clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirements [of the] Directive and associated EFTA regulations.”

Shell boilers EN Table ZA.1 (extract) Design & calculation for pressure parts EN clause Content PED Annex I 5.1 to 5.7 Design general Hydrostatic test pressure Wear Operating temps Allowable stresses 7.1.2(etc

Valves prEN Table ZA.1 (extract) Shell design strength – tabulation method prEN clause ESR title ESR number Remarks 12Marking3.3 See also EN 19 5Materials 4.1 a Restriction agreed 6Materials 4.2 a 10.6 Joint coefficients 7.2(etc

Guidelines Guidelines are not legally binding, but are regarded very highly in most Member States Guidelines are not legally binding, but are regarded very highly in most Member States Kept active when drafting standards Kept active when drafting standards Examples Examples 9/20 Generic statement rejecting imposed national requirements affecting design etc. 9/20 Generic statement rejecting imposed national requirements affecting design etc. 8/15 specific requirements to be included at design stage, drawn from national rules regarding operation in some member states 8/15 specific requirements to be included at design stage, drawn from national rules regarding operation in some member states

Question 1 Can we use standards other than EN in pressure equipment? Answer YES as long as the manufacturer meets the essential safety requirements in the PED. [Commercial considerations may apply ie. the overall cost may be greater]

Question 2 How do I know that AD 2000, CODAP, PD5500, ASME or other non-EN standard meets the Essential Safety Requirements? Answer You do not know, unless the manufacturer:  reviews his arrangements for complying with ESRs and  the Notified Body accepts this, where it is involved in Conformity Assessment.

Question 3 Does this mean that the manufacturer takes on additional responsibility by not using EN? Answer YES – other standards do not confer Presumption of Conformity with the ESRs.

Useful websites - Text of Directive, Guidelines and links to standards, notified bodies, JRC, etc “Blue” Guide Directives and related standards

Useful CEN addresses PE Standards Work Programme usinessdomains/mechanicalengineering/pressure /workprogramme.asp usinessdomains/mechanicalengineering/pressure /workprogramme.asp Materials Work Programme usinessdomains/materials/workprogramme.asp usinessdomains/materials/workprogramme.asp

ECISS Work Programme cture+/relations/workprogrammeeciss.asp cture+/relations/workprogrammeeciss.asp

Materials issues: EN/ASME/ASTM PED Annex I clause 4.1 (a) emphasises ductility and toughness, quantified in clause 7.5. European materials have guaranteed properties of strength [room (and elevated) temperature], ductility and toughness (transverse direction). European materials have guaranteed properties of strength [room (and elevated) temperature], ductility and toughness (transverse direction).  American materials standards do not always state these properties and they are not guaranteed. Levels of C, S (and P) are not consistent with good impact properties expected in Europe.

Cautionary preface on some materials standards cited in OJ ( Guideline 7/1) For the following harmonised supporting standard for materials, presumption of conformity to the ESRs is limited to technical data of materials in the standard and does not presume adequacy of the material to a specific equipment. Consequently the technical data stated in the material standard should be assessed against the design requirements of the specific equipment to verify that the ESRs of the PED are satisfied.

Continue on Tables Notes Data in the tables should be checked with published sources or the relevant TC or NSB. It has been condensed for ease of presentation and is subject to update. (*) denotes prEN