1. Harmonized Standards / Materials Josef L
Harmonized Standards / Materials Josef L. Zeman Vienna University of Technology

2. Harmonized Standards / Definition
Designation used in New Approach Directives
Legal term for European Standards, in the New Approach adopted by CEN, following a mandate by the European Commission after consultation of Member States, prepared in acc. with the General Guidelines

3. Harmonized Standards / Presumption of Conformity
Compliance with harmonized standards, which reference numbers have been published in the Official Journal ... provides presumption of conformity to the corresponding essential requirements of the EC directive(s). (Annex I of PED).

4. Annex ZA. EN13445-3 (informative)
Annex ZA EN (informative) Clauses of this European Standard addressing essential requirements or other provisions of the EU Directives
This European standard has been prepared under a mandate given to CEN by the European Commission and supports essential requirements of the PED with regard to design of unfired pressure vessels
The clauses of this standard given in Table ZA-1 are likely to support requirements of the PED.
Compliance with these clauses of this standard provides one means of conforming with the specific essential safety requirements of the Directive concerned and associated EFTA regulations.
WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard.

5. Table ZA-1-Correspondence between this European Standard and Directive 97/23/EC
Clauses of EN
Contents
Annex I of Directive 97/23/EC
All clauses
Design for adeqate strength
2.2 5
Calculation method – DBF
2.2.3 6
Quantitative requirements 7
7 to 18
Annex A Annex E Annex F Annex G Annex J Annex P Annex Q
Annex B, Annex C
Calculation method – Design by Analysis

6. Harmonized Standards / Usage
Not mandatory – one means of complying with PED requirements Any other technical solution may be used provided that the PED requirements are met (and an at least equal level of safety is achieved)
Guideline 9/5
Partial usage not forbidden, but the essential requirements covered shall be identified. Verification of compatibility and consistency required
Guideline 9/6

7. Harmonized Standards / Annex I
Annex I – Essential requirements
The essential requirements are to be interpreted and applied in such a way as to take account of the state of the art and current practice at the time of design and manufacture as well as technical and economic considerations consistent with a high degree of health and safety protection

8. Usage of other standards
Usage of other solutions does not give presumption of conformity (to the essential requirements of the Directive)
Detailed description in Technical Documentation required
Validation by Notified Body required, if module requires involvement
Only the technical content of used document is relevant (not others related to e. g. conformity assessment)
Guideline 9/5

9. Harmonized Standards / PED
Pressure equipment and assemblies which conform to the national standards … shall be presumed to conform to the essential requirements
Article 5

10. all aspects of the respective product covered
Harmonized Product Standards (~100)
all aspects of the respective product covered
Harmonized Supporting Standards (~150)
working or testing methods for specified areas
Harmonized Material Standards (~ )
listing and describing materials properties

11. Requirements for materials
Three routes stated in EN :
- Relevant European Standards (referred to in equipment standard)
- European Approval for Materials (material shall only be used within range of application and if 4.1 and 4.2 have been taken into consideration)
- Particular Material Appraisals (material accepted by a particular material appraisal and if 4.1 and 4.2 have been taken into consideration)

12. Requirements for materials / continuation
For material acc. to European Standards:
Marking acc. to the relevant product standard
For material acc. to another route:
Marking shall at least contain
- matl spec. (reference, matl designation)
- manufacturer’s name or mark
- stamp of the inspection representative (if applicable)

13. CEN/TCs: Product standards
54 Unfired pressure vessels BSI (UK)
69 Industrial valves AFNOR (F)
182 Refrigerating systems, safety and environmental requirements DIN (DE)
210 GRP tanks and vessels DIN (DE)
267 Industrial piping and pipelines AFNOR (F)
268 Cryogenic vessels AFNOR (F)
269 Shell boilers and water-tube boilers DIN (DE)
286 Liquefied petroleum gas equipment and accessories NSAI (EI)

14. CEN/TCs: Supporting & materialstandards
74 Flanges and their joint DIN (DE)
121 Welding DS (DK)
132 Aluminium and aluminium alloys AFNOR (F)
133 Copper and copper alloys DIN (DE)
138 Non-destructive-testing AFNOR (F)
155 Plastic piping systems and ducting systems NEN (NL)
185 Threaded and non-threaded mechanical fasteners and accessories DIN (DE)
235 Gas pressure regulators UNI (I)

15. ECISS/TCs for material standards
9 Technical conditions of delivery and quality control
10 Structural steels – grades and qualities
13 Flat products for cold working – qualities, dimensions, tolerances and specific tests
15 Wire rod – qualities, dimensions, tolerances and specific tests
22 Steels for pressure purposes - qualities
23 Steels for heat treatment, alloy steels and free-cutting steels – qualities and dimensions
28 Steel forging
29 Steel tubes and fittings for steel tubes
31 Steel castings

16. Example 1: Unfired Pressure Vessels: Flanges
Direct reference:
EN Sub-clauses and
Indirect requirements:
Materials: EN (Fabrication: EN ) Testing: EN

17. Introduction
Circular bolted flanged connections, … shall conform to either:
a) an appropriate European Standard for pipework flanges, and the requirements of ; or
b) the requirements for bolted flanged connections specified in this clause; or
c) the alternative rules in Annex G.

18. 11.4.2 Use of standard flanges without calculation
Flanges that conform to a European Standard for pipework flanges may be used … without any calculation, provided that all the following conditions are fulfilled:
a) Under normal operating conditions, the calculation pressure does not exceed the rating pressure given … in the relevant European Standard, for the calculation temperature

19. b) Under testing or exceptional conditions, the calculation pressure does not exceed 1,5 times the rating pressure … at appropriate temperature.
c) The gasket is one of those permitted by Table for the relevant PN or Class series.

20. d) The bolts are of a strength category at least equal to the minimum required by Table as a function of the gasket type used in the connection.
e) The vessel is subjected to loading of predominently non-cyclic nature.

21. f) The difference between mean temperatures of bolts and flanges does not exceed 50°C in any condition.
g) The bolt and flange material have coefficients of linear thermal expansion at 20°C that differ by more than 10% … but the calculation temperatures are less than 120°C, or the bolt and flange material have coefficients of linear thermal expansion at 20°C which do not differ by more than 10%.

22. Table 11.4-1 – Gaskets for standard flanges
PN designated series 1)
Class designated series 1)
Gasket type
Minimum bolt strength category required (see Table )
2,5 to 16 -
- Non-metallic flat gasket with or without jacket
Low strength 25
150
- Spiral-wound metal with filler
- Corrugated metal jacketed with filler
- Corrugated metal with or without filler
Medium strength 40
- Flat metal jacketed with filler
- Grooved or solid flat metal
High strength

23. 63
300
- Non-metallic flat gasket with or without jacket
Low strength
- Spiral-wound metal with filler
- Corrugated metal jacketed with filler
- Corrugated metal with or without filler
Medium strength
- Flat metal jacketed with filler
- Grooved or solid flat metal
- Metal ring joint
High strength
100
600
1) The PN (or Class) values presented in this table are restricted to those existing in EN Standards on Steel Flanges, up to PN 100 (or Class 600).

24. Example 2: Unfired Pressure Vessels: Tubes
Direct Reference:
EN x: Seamless tubes for pressure purposes – Technical delivery conditions
EN x: Welded steel tubes for pressure purposes – Technical delivery conditions

25. Example 3: Unfired Pressure Vessels: Bolts
Direct references in EN
EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10272: Stainless steel bars for pressure purposes
EN10273: Hot rolled weldable steel bars for pressure purposes with specified elevated temperature properties
Additional requirements in sub-clause 4.2.4

26. Example 4: Usage of ASTM materials in accordance with EN 13445:
For ASTM materials the “direct” route for standards material (acc. to relevant European standards) is not applicable – only the routes via the European Approval for Materials or the Particular Material Appraisal apply.