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  • EN 764-4:2014

    Current The latest, up-to-date edition.

    Pressure equipment - Part 4: Establishment of technical delivery conditions for metallic materials

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    Published date:  17-12-2014

    Publisher:  Comite Europeen de Normalisation

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    Abstract - (Show below) - (Hide below)

    This European Standard specifies the requirements, under the regime of the EU Directive 97/23/EC on Pressure Equipment (PED), for the establishment of the technical delivery conditions in the form of:-harmonized European Standards for material;-European Approval for Materials (EAM);-Particular Material Appraisal (PMA)for metallic materials for pressure equipment in all product forms. Welding consumables are not covered by this standard.This European Standard was developed predominantly on the basis of steel, nickel and nickel-based materials. However, application to other materials is not restricted but should consider specific aspects relevant to the material concerned.

    General Product Information - (Show below) - (Hide below)

    Committee CEN/TC 54
    Development Note Supersedes PREN 764-4. (01/2015)
    Document Type Standard
    Publisher Comite Europeen de Normalisation
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    10/30216705 DC : 0 BS EN 12953-2 - SHELL BOILERS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    99/707159 DC : DRAFT APR 99 BS PREN 13480-2 - METALLIC INDUSTRIAL PIPING - PART 2: MATERIALS
    13/30259076 DC : 0 BS EN 13445-8 - UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    PREN 14276-2 : DRAFT 2017 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    I.S. EN 13445-2:2014 UNFIRED PRESSURE VESSELS - PART 2: MATERIALS
    BS EN 14917 : 2009 METAL BELLOWS EXPANSION JOINTS FOR PRESSURE APPLICATIONS
    EN 14917:2009+A1:2012 Metal bellows expansion joints for pressure applications
    I.S. EN 13480-2:2017 METALLIC INDUSTRIAL PIPING - PART 2: MATERIALS
    BS EN 13480-8:2017 Metallic industrial piping Additional requirements for aluminium and aluminium alloy piping
    BS EN 13480-2:2017 Metallic industrial piping Materials
    BS EN 13480-8:2017+A1:2019 Metallic industrial piping Additional requirements for aluminium and aluminium alloy piping
    BS EN 764-5:2014 Pressure equipment Inspection documentation of metallic materials and compliance with the material specification
    UNE-EN 764-5:2015 Pressure equipment - Part 5: Inspection documentation of metallic materials and compliance with the material specification
    I.S. EN 14276-1:2006 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    EN 12952-2:2011 Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of boilers and accessories
    CEN/TS 764-8:2016 Pressure equipment and assemblies - Part 8: Proof test
    CEN/TR 14549:2004 Guide to the use of ISO 15649 and ANSI/ASME B31.3 for piping in Europe in compliance with the Pressure Equipment Directive
    EN 12178:2016 Refrigerating systems and heat pumps - Liquid level indicating devices - Requirements, testing and marking
    I.S. EN 12284:2003 REFRIGERATING SYSTEMS AND HEAT PUMPS - VALVES - REQUIREMENTS, TESTING AND MARKING
    EN 12693:2008 Refrigerating systems and heat pumps - Safety and environmental requirements - Positive displacement refrigerant compressors
    EN 12953-2:2012 Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
    DIN EN 14917:2012-06 Metal bellows expansion joints for pressure applications (includes Amendment A1:2012)
    DIN EN 12693:2016-10 (Draft) REFRIGERATING SYSTEMS AND HEAT PUMPS - SAFETY AND ENVIRONMENTAL REQUIREMENTS - POSITIVE DISPLACEMENT REFRIGERANT COMPRESSORS
    I.S. CEN TR 14549:2004 GUIDE TO THE USE OF ISO 15649 AND ANSI/ASME B31.3 FOR PIPING IN EUROPE IN COMPLIANCE WITH THE PRESSURE EQUIPMENT DIRECTIVE
    BS EN 12693:2008 Refrigerating systems and heat pumps. Safety and environmental requirements. Positive displacement refrigerant compressors
    17/30365570 DC : 0 BS EN 13445-2 AMD 6 - UNFIRED PRESSURE VESSELS - PART 2: MATERIALS
    BS EN 13445-8 : 2014 UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    PD CEN/TR 14549:2004 Guide to the use of ISO 15649 and ANSI/ASME B31.3 for piping in Europe in compliance with the Pressure Equipment Directive
    UNE-EN 16668:2016 Industrial valves - Requirements and testing for metallic valves as pressure accessories
    I.S. EN 13445-8:2014 UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    DIN EN 12516-4:2015-01 INDUSTRIAL VALVES - SHELL DESIGN STRENGTH - PART 4: CALCULATION METHOD FOR VALVE SHELLS MANUFACTURED IN METALLIC MATERIALS OTHER THAN STEEL
    EN 12516-4:2014 Industrial valves - Shell design strength - Part 4: Calculation method for valve shells manufactured in metallic materials other than steel
    DIN EN 12284:2004-01 Refrigerating systems and heat pumps - Valves - Requirements, testing and marking
    I.S. EN 764-5:2014 PRESSURE EQUIPMENT - PART 5: INSPECTION DOCUMENTATION OF METALLIC MATERIALS AND COMPLIANCE WITH THE MATERIAL SPECIFICATION
    I.S. EN 12953-2:2012 SHELL BOILERS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    I.S. EN 12178:2016 REFRIGERATING SYSTEMS AND HEAT PUMPS - LIQUID LEVEL INDICATING DEVICES - REQUIREMENTS, TESTING AND MARKING
    I.S. EN 12952-2:2011 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    I.S. EN 13480-8:2017&LC:2019 METALLIC INDUSTRIAL PIPING - PART 8: ADDITIONAL REQUIREMENTS FOR ALUMINIUM AND ALUMINIUM ALLOY PIPING
    NF EN 14276-1 : 2006 + A1 2011 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    NF EN 14276-2 : 2007 + A1 2011 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    NF EN 12952-2 : 2011 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    12/30260023 DC : 0 BS EN 13480-8 - METALLIC INDUSTRIAL PIPING - PART 8: ADDITIONAL REQUIREMENTS FOR ALUMINIUM AND ALUMINIUM ALLOYS
    UNI EN 12693 : 2008 REFRIGERATING SYSTEMS AND HEAT PUMPS - SAFETY AND ENVIRONMENTAL REQUIREMENTS - POSITIVE DISPLACEMENT REFRIGERANT COMPRESSORS
    08/30184300 DC : DRAFT SEP 2008 BS EN 12952-2 - WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    05/30114218 DC : DRAFT FEB 2005 EN 13480-8 - METALLIC INDUSTRIAL PIPING - PART 8: ADDITIONAL REQUIREMENTS FOR ALUMINIUM AND ALUMINIUM ALLOY PIPING
    DIN EN 14917 E : 2012 METAL BELLOWS EXPANSION JOINTS FOR PRESSURE APPLICATIONS
    PREN 12178 : DRAFT 2016 REFRIGERATING SYSTEMS AND HEAT PUMPS - LIQUID LEVEL INDICATING DEVICES - REQUIREMENTS, TESTING AND MARKING
    EN 13445-2:2014/A2:2018 UNFIRED PRESSURE VESSELS - PART 2: MATERIALS
    UNE-EN 13480-8:2017 Metallic industrial piping - Part 8: Additional requirements for aluminium and aluminium alloy piping (Endorsed by Asociación Española de Normalización in September of 2019.)
    PREN 13480-8 : DRAFT 2012 METALLIC INDUSTRIAL PIPING - PART 8: ADDITIONAL REQUIREMENTS FOR ALUMINIUM AND ALUMINIUM ALLOYS
    BS EN 16668 : 2016 INDUSTRIAL VALVES - REQUIREMENTS AND TESTING FOR METALLIC VALVES AS PRESSURE ACCESSORIES
    I.S. EN 14917:2009 METAL BELLOWS EXPANSION JOINTS FOR PRESSURE APPLICATIONS
    DIN EN 12178:2016-05 (Draft) REFRIGERATING SYSTEMS AND HEAT PUMPS - LIQUID LEVEL INDICATING DEVICES - REQUIREMENTS, TESTING AND MARKING
    DIN EN 14276-1:2011-05 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    DIN EN 14276-2:2011-05 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    EN 14276-1:2020 Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels - General requirements
    UNI EN 14276-2 : 2011 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    UNI EN 14276-1 : 2011 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    UNI EN 12952-2 : 2011 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    UNI EN 12953-2 : 2012 SHELL BOILERS - PART 2: MATERIALS FOR PRESSURE PARTS OF BOILERS AND ACCESSORIES
    16/30335111 DC : 0 BS EN 12178 - REFRIGERATING SYSTEMS AND HEAT PUMPS - LIQUID LEVEL INDICATING DEVICES - REQUIREMENTS, TESTING AND MARKING
    13/30287824 DC : 0 BS EN 16668 - INDUSTRIAL VALVES - REQUIREMENTS AND TESTING FOR METALLIC VALVES AS PRESSURE ACCESSORIES
    09/30188143 DC : DRAFT OCT 2009 BS EN 13480-2:2002/A2 - METALLIC INDUSTRIAL PIPING - PART 2: MATERIALS
    17/30351224 DC : 0 BS EN 14276-1 - PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    I.S. EN 12516-4:2014 INDUSTRIAL VALVES - SHELL DESIGN STRENGTH - PART 4: CALCULATION METHOD FOR VALVE SHELLS MANUFACTURED IN METALLIC MATERIALS OTHER THAN STEEL
    UNI EN 14917 : 2012 METAL BELLOWS EXPANSION JOINTS FOR PRESSURE APPLICATIONS
    BS EN 12516-4 : 2014 INDUSTRIAL VALVES - SHELL DESIGN STRENGTH - PART 4: CALCULATION METHOD FOR VALVE SHELLS MANUFACTURED IN METALLIC MATERIALS OTHER THAN STEEL
    BS EN 13445-2 : 2014 UNFIRED PRESSURE VESSELS - PART 2: MATERIALS
    UNI EN 12516-4 : 2014 INDUSTRIAL VALVES - SHELL DESIGN STRENGTH - PART 4: CALCULATION METHOD FOR VALVE SHELLS MANUFACTURED IN METALLIC MATERIALS OTHER THAN STEEL
    UNE-EN 12516-4:2016 Industrial valves - Shell design strength - Part 4: Calculation method for valve shells manufactured in metallic materials other than steel
    I.S. EN 12693:2008 REFRIGERATING SYSTEMS AND HEAT PUMPS - SAFETY AND ENVIRONMENTAL REQUIREMENTS - POSITIVE DISPLACEMENT REFRIGERANT COMPRESSORS
    S.R. CEN/TS 764-8:2016 PRESSURE EQUIPMENT AND ASSEMBLIES - PART 8: PROOF TEST
    EN 13445-8 : 2014 COR 2017 UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    17/30351221 DC : 0 BS EN 14276-2 - PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    BS EN 13480-2:2017+A3:2018 Metallic industrial piping Materials
    BS EN 12178:2003 Refrigerating systems and heat pumps. Liquid level indicating devices. Requirements, testing and marking
    BS EN 12284:2003 Refrigerating systems and heat pumps. Valves. Requirements, testing and marking
    UNE-EN 12952-2:2012 Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of boilers and accessories
    UNE-EN 12953-2:2013 Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
    BS EN 14276-2 : 2007 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    I.S. EN 14276-2:2007 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 2: PIPING - GENERAL REQUIREMENTS
    EN 14276-1:2006+A1:2011 Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels - General requirements
    EN 13480-2:2017 Metallic industrial piping - Part 2: Materials
    BS EN 14276-1 : 2006 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    EN 14276-2:2007+A1:2011 Pressure equipment for refrigerating systems and heat pumps - Part 2: Piping - General requirements
    UNE-EN 12178:2017 Refrigerating systems and heat pumps - Liquid level indicating devices - Requirements, testing and marking
    EN 764-5:2014 Pressure equipment - Part 5: Inspection documentation of metallic materials and compliance with the material specification
    EN 13480-8:2017 Metallic industrial piping - Part 8: Additional requirements for aluminium and aluminium alloy piping
    03/119783 DC : DRAFT DEC 2003 BS EN 13445-8 - UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    UNE-EN 14276-2:2008 Pressure equipment for refrigerating systems and heat pumps - Part 2: Piping - General requirements
    PREN 13445-8 : DRAFT 2013 UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    PD CEN/TS 764-8:2016 Pressure equipment and assemblies Proof test
    PREN 14276-1 : DRAFT 2017 PRESSURE EQUIPMENT FOR REFRIGERATING SYSTEMS AND HEAT PUMPS - PART 1: VESSELS - GENERAL REQUIREMENTS
    UNE-EN 13445-2:2015 Unfired pressure vessels - Part 2: Materials
    UNE-EN 13445-8:2015 Unfired pressure vessels - Part 8: Additional requirements for pressure vessels of aluminium and aluminium alloys
    UNI EN 13445-8 : 2015 UNFIRED PRESSURE VESSELS - PART 8: ADDITIONAL REQUIREMENTS FOR PRESSURE VESSELS OF ALUMINIUM AND ALUMINIUM ALLOYS
    UNE-EN 14917:2011 Metal bellows expansion joints for pressure applications
    DIN EN 12953-2:2012-05 Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
    DIN EN 12952-2:2011-10 Water-tube boilers and auxiliary installations - Part 2: Materials for pressure parts of boilers and accessories
    DIN EN 764-5:2015-03 PRESSURE EQUIPMENT - PART 5: INSPECTION DOCUMENTATION OF METALLIC MATERIALS AND COMPLIANCE WITH THE MATERIAL SPECIFICATION
    BS EN 12953-2:2012 Shell boilers Materials for pressure parts of boilers and accessories
    BS EN 12952-2:2011 Water-tube boilers and auxiliary installations Materials for pressure parts of boilers and accessories
    DIN EN 12693:2008-09 REFRIGERATING SYSTEMS AND HEAT PUMPS - SAFETY AND ENVIRONMENTAL REQUIREMENTS - POSITIVE DISPLACEMENT REFRIGERANT COMPRESSORS
    EN 12284 : 2003 REFRIGERATING SYSTEMS AND HEAT PUMPS - VALVES - REQUIREMENTS, TESTING AND MARKING
    UNE-EN 13480-2:2017 Metallic industrial piping - Part 2: Materials (Endorsed by Asociación Española de Normalización in September of 2019.)
    UNE-EN 14276-1:2007 Pressure equipment for refrigerating systems and heat pumps - Part 1: Vessels - General requirements

    Standards Referencing This Book - (Show below) - (Hide below)

    EN 13480-2:2017 Metallic industrial piping - Part 2: Materials
    EN 10213:2007+A1:2016 Steel castings for pressure purposes
    ISO 642:1999 Steel — Hardenability test by end quenching (Jominy test)
    EN ISO 6892-1:2016 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1:2016)
    EN 10273:2016 Hot rolled weldable steel bars for pressure purposes with specified elevated temperature properties
    EN 10164:2004 Steel products with improved deformation properties perpendicular to the surface of the product - Technical delivery conditions
    EN ISO 377:2017 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:2017)
    EN ISO 643:2012 Steels - Micrographic determination of the apparent grain size (ISO 643:2012)
    ISO/TR 15608:2017 Welding Guidelines for a metallic materials grouping system
    CR ISO 15608 : 2000 WELDING - GUIDELINES FOR A METALLIC MATERIAL GROUPING SYSTEM
    EN 10314:2016 Method for the derivation of minimum values of proof strength of steel at elevated temperatures
    EN ISO 3690:2012 Welding and allied processes - Determination of hydrogen content in arc weld metal (ISO 3690:2012)
    EN 764-1:2015+A1:2016 Pressure equipment - Part 1: Vocabulary
    ISO 6892-1:2016 Metallic materials Tensile testing Part 1: Method of test at room temperature
    EN ISO 204:2009 Metallic materials - Uniaxial creep testing in tension - Method of test (ISO 204:2009)
    ISO 17642-3:2005 Destructive tests on welds in metallic materials — Cold cracking tests for weldments — Arc welding processes — Part 3: Externally loaded tests
    EN 764-5:2014 Pressure equipment - Part 5: Inspection documentation of metallic materials and compliance with the material specification
    ISO 10052:2004 Acoustics Field measurements of airborne and impact sound insulation and of service equipment sound Survey method
    ISO 148-1:2016 Metallic materials — Charpy pendulum impact test — Part 1: Test method
    ISO 15614-1:2017 Specification and qualification of welding procedures for metallic materials — Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
    EN 10272:2016 Stainless steel bars for pressure purposes
    ISO 15609-1:2004 Specification and qualification of welding procedures for metallic materials Welding procedure specification Part 1: Arc welding
    ISO 3651-2:1998 Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid
    EN ISO 642:1999 Steel - Hardenability test by end quenching (Jominy test) (ISO 642:1999)
    ISO 3785:2006 Metallic materials — Designation of test specimen axes in relation to product texture
    EN ISO 17642-1:2004 Destructive tests on welds in metallic materials - Cold cracking tests for weldments - Arc welding processes - Part 1: General (ISO 17642-1:2004)
    EN ISO 3785:2006 Metallic materials - Designation of test specimen axes in relation to product texture (ISO 3785:2006)
    EN 10204:2004 Metallic products - Types of inspection documents
    EN ISO 6892-2:2011 Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature (ISO 6892-2:2011)
    EN ISO 3651-2 : 1998 DETERMINATION OF RESISTANCE TO INTERGRANULAR CORROSION OF STAINLESS STEELS - FERRITIC, AUSTENITIC AND FERRITIC-AUSTENITIC (DUPLEX) STAINLESS STEELS - CORROSION TEST IN MEDIA CONTAINING SULFURIC ACID
    EN ISO 15609-1:2004 Specification and qualification of welding procedures for metallic materials - Welding procedure specification - Part 1: Arc welding (ISO 15609-1:2004)
    ISO 643:2012 Steels Micrographic determination of the apparent grain size
    EN 12074:2000 Welding consumables - Quality requirements for manufacture, supply and distribution of consumables for welding and allied processes
    ISO 3690:2012 Welding and allied processes Determination of hydrogen content in arc weld metal
    ISO 17642-1:2004 Destructive tests on welds in metallic materials — Cold cracking tests for weldments — Arc welding processes — Part 1: General
    EN ISO 17642-3:2005 Destructive tests on welds in metallic materials - Cold cracking tests for weldments - Arc welding processes - Part 3: Externally loaded tests (ISO 17642-3:2005)
    ISO 6892-2:2011 Metallic materials Tensile testing Part 2: Method of test at elevated temperature
    EN ISO 4136:2012 Destructive tests on welds in metallic materials - Transverse tensile test (ISO 4136:2012)
    EN 764-2:2012 Pressure equipment - Part 2: Quantities, symbols and units
    ISO 4136:2012 Destructive tests on welds in metallic materials Transverse tensile test
    EN ISO 148-1:2016 Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1:2016)
    EN ISO 17642-2:2005 Destructive tests on welds in metallic materials - Cold cracking tests for weldments - Arc welding processes - Part 2: Self-restraint tests (ISO 17642-2:2005)
    ISO 15607:2003 Specification and qualification of welding procedures for metallic materials General rules
    ISO 377:2017 Steel and steel products — Location and preparation of samples and test pieces for mechanical testing
    ISO 204:2009 Metallic materials Uniaxial creep testing in tension Method of test
    ISO 17642-2:2005 Destructive tests on welds in metallic materials — Cold cracking tests for weldments — Arc welding processes — Part 2: Self-restraint tests
    EN ISO 10052:2004/A1:2010 ACOUSTICS - FIELD MEASUREMENTS OF AIRBORNE AND IMPACT SOUND INSULATION AND OF SERVICE EQUIPMENT SOUND - SURVEY METHOD
    EN ISO 15607:2003 Specification and qualification of welding procedures for metallic materials - General rules (ISO 15607:2003)
    1997/23/EC : 1997 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
    EN 287-1:2011 Qualification test of welders - Fusion welding - Part 1: Steels
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