Annex G
(informative)
Significant technical changes between this European Standard and the
previous edition
|
Clause/paragraph/table/flgure |
Change |
|
General |
Numbering system of tables and drawings has changed. |
|
2 / Normative references |
References updated. |
|
7.3.1 / Forming of tube bends - General |
Clarification: This clause does not apply to fittings |
|
Figure 7.3-1 and -2 / Limits of departure from circularity |
Abbreviations corrected. |
|
8.1.7/ Minimum distances between adjacent seams |
Requirements for attachment welds modified. |
|
8.8 / Welding subsequent to final post-weld heat treatment |
Requirements b) and c) modified. |
|
Figure 8.9-1 a) / Butt welds in plates of unequal thickness with middle lines coincident a) shell to shell joint |
Drawing updated. |
|
8.11.4 / Proximity of butt welds in straight tubes |
Requirements modified. |
|
Table 10.3-1 / Recommended preheat temperatures for thermal cutting |
Steel types added and steel groups updated. |
|
10.4.1.1 / Post weld heat treatment |
EN ISO 17663 referenced as required standard. |
|
Table 10.4-2 / Temperature ranges for post-weld heat treatment for welded joints of similar and dissimilar materials |
Steel types added and steel groups updated. |
|
Table 10.4-3 / Holding time for post-weld heat treatment conditions for welded joints |
Steel types added and steel groups updated. |
|
Clause/paragraph/table/figure |
Change |
|
Annex В / Welded pressure connections and non-pressure containing attachments |
— All figures deleted. — For welded connections and joint preparations reference made to relevant standards |
|
Annex C-4.2.4 / Manufacture of welded tube walls - Site welding |
Requirements modified. |
|
Annex E / Special requirements for composite tubes |
Title modified from “Chemical recovery boiler”. |
|
Table F.1 / Schedule concerning topics for competency declaration of boiler manufacturers |
Referenced standards updated. |
NOTE The technical changes referred include the significant technical changes from the EN revised but is not an exhaustive list of all modifications from the previous version.Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission to provide a means of conforming to Essential Requirements of the New Approach Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment.
Once this standard is cited in the Official Journal of the European Union under that Directive and 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 that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Directive 97/23/EC
|
Clauses of this European Standard |
Content |
Essential Safety Requirements (ESRs) of Directive 97/23/EC, Annex I |
|
6.1, Annex A |
Manufacturing procedures |
3.1 |
|
7.1, 7.2, 7.3, 7.4 |
Preparation of component parts |
3.1.1 |
|
7.1.2, 7.3.11, 8.4.1 |
Joining - Freedom from surface or internal defects |
3.1.2 1st paragraph |
|
8.7 |
Joining - Properties of joints |
3.1.2 2nd paragraph |
|
8.3.1 |
Joining - Qualified personnel and suitable procedures |
3.1.2 3rd paragraph |
|
8.3.2 |
Joining - Approval of welding personnel |
3.1.2 4th paragraph |
|
7.3.8, 7.3.9, 8.6, 8.7, 10 |
Heat treatment |
3.1.4 |
|
6.2, 6.3, 6.4 |
T raceability |
3.1.5 |
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard.Bibliography
EN 1011-1:2009, Welding — Recommendations for welding of metallic materials — Part 1: General guidance for arc welding
EN 1011-2, Welding — Recommendations for welding of metallic materials — Part 2: Arc welding of ferritic steels
EN 1011-3, Welding — Recommendations for welding of metallic materials — Part 3: Arc welding of stainless steels
EN 1708-1, Welding — Basic welded joint details in steel — Part 1: Pressurized components
EN 1708-2, Welding — Basic weld joint details in steel — Part 2: Non internal pressurized components
EN 12952-4, Water-tube boilers and auxiliary installations — Part 4: In-service boiler life expectancy calculations
EN ISO 3834-2:2005, Quality requirements for fusion welding of metallic materials — Part 2: Comprehensive quality requirements (ISO 3834-2:2005)
EN ISO 3834-3, Quality requirements for fusion welding of metallic materials — Part 3: Standard quality requirements (ISO 3834-3:2005)
EN ISO 4063, Welding and allied processes — Nomenclature of processes and reference numbers (ISO 4063: 2009, Corrected version 2010-03-01)
EN ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatingsfISO 8501-1:2007)
EN ISO 9000, Quality management systems — Fundamentals and vocabulary (ISO 9000:2005)
EN ISO 9001:2008, Quality management systems — Requirements (ISO 9001:2008)
EN ISO 9692-1, Welding and allied processes — Recommendations for joint preparation — Part 1: Manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels (ISO 9692-1:2003)
EN ISO 9692-2, Welding and allied processes — Joint preparation — Part 2: Submerged arc welding of steels (ISO 9692-2:1998)
EN ISO 13916:1996, Welding — Guidance for the measurement of preheating temperature, interpass temperature and preheat maintenance temperature (ISO 13916:1996)
EN ISO 14731, Welding coordination— Tasks and responsibilities (ISO 14731:2006)
CEN ISO/TR 20172, Welding — Grouping systems for materials — European materials (ISO/TR 20172:2009)
1 Whilst it is difficult to define minor repairs, an excavation of maximum length of 100 mm and a depth of e/10 (where e is the component nominal thickness) or 6 mm maximum depth may be considered minor, but values greater than this may be exceeded.
2 A production run is a series of tubes of the same size and material being welded to form a panel on a specific machine within the same machine set-up.
