M/601 - PED 2

This document specifies requirements for unfired pressure vessels and their parts made of aluminium and aluminium alloys in addition to the general requirements for unfired pressure vessels under EN 13445:2026 Parts 1 to 5. This document specifies unfired pressure vessels for loads up to 500 full cycles.
NOTE    Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this document.

This Part 10 of this document specifies requirements for unfired pressure vessels and their parts made of nickel and nickel alloys (see 3.1) in addition to the general requirements for unfired pressure vessels under EN 13445-1:2026, EN 13445-2:2026, EN 13445-3:2026, EN 13445-4:2026 and EN 13445-5:2026.
NOTE   Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this document.

This document applies to industrial metallic valves for hydrogen use. It contains recommendations and additional requirements applicable to material selection, design, manufacture, and final assessment.
This document addresses the following four services/damage mechanisms, which might exist in combinations:
—   low temperature applications;
—   hydrogen environmental embrittlement (HEE) or hydrogen-induced cracking (HIC);
—   high temperature hydrogen attack (HTHA);
—   hydrogen service with cyclic loads (fatigue).
This document considers the difference between gaseous hydrogen (GH2) and liquid hydrogen (LH2), where necessary.
The additional provisions set out in this document do not cover corrosion such as electro-chemical corrosion of metals under participation of hydrogen (e.g. sour gas).
This document is based on the requirements contained in the standards specified below:
—   applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment, the applicable provisions of EN 16668 apply;
—   additional requirements for valves in chemical and petrochemical applications are specified in EN 12569;
—   additional requirements for valves in gas distribution systems are specified in EN 13774;
—   additional requirements for valves in gas transportation systems are specified in EN 14141.

This document specifies the requirements for steel products used for unfired pressure vessels.
For some metallic materials other than steel, such as spheroidal graphite cast iron, aluminium, nickel, copper, titanium, requirements are or will be formulated in separate parts of this document.
For metallic materials which are not covered by a harmonized material standard and are not likely to be in near future, specific rules are given in this part or the above cited parts of this document.

This Part of this document specifies requirements for the design of unfired pressure vessels covered by EN 13445-1: 2026 and constructed of steels in accordance with EN 13445-2:2026.
EN 13445-5: 2026, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements.
This Part applies to design of vessels before putting into service. It may be used for in service calculation or analysis subject to appropriate adjustment.

This document defines the terms, definitions, quantities, symbols and units that are used throughout the EN 13445 series and gives general information on the design and manufacturing of vessels under this standard.
It also contains instructions on how to use the standard (Annex A) as well as an index which covers the whole standard (Annex B). This information is aimed to aid users of the EN 13445 series.
This document applies to unfired pressure vessels with a maximum allowable pressure greater than 0,5 bar gauge but may be used for vessels operating at lower pressures, including vacuum.
This document is not applicable to pressure vessels of the following types:
- vessels of riveted construction;
- vessels of lamellar cast iron or any other materials not included in Parts 2, 6, or 8 of the standard;
- multilayered, autofrettaged or pre-stressed vessels.
This document can be applied to the following pressure vessels, provided that account is taken of additional and/or alternative requirements resulting from the hazard analysis and from rules or instructions specific for:
- transportable vessels;
- items specifically designed for nuclear use;
- pressure vessels with a risk of overheating.
NOTE EN 14222 covers electrically fired boilers made from stainless steel and can be used as an example of additional requirements for such vessels.
Other European standards apply to industrial piping (EN 13480 series) and to water tube and shell boilers (EN 12952 series and EN 12953 series).

This document specifies requirements for the manufacture of unfired pressure vessels and their parts, made of steels, including their connections to non-pressure parts. It specifies requirements for material traceability, manufacturing tolerances, welding requirements, requirements for permanent joints other than welding, production tests, forming requirements, heat treatment, repairs and finishing operations.

This document specifies requirements for unfired pressure vessels and their parts made of titanium and titanium alloys in addition to the general requirements for unfired pressure vessels under EN 13445-1:2026 to EN 13445-5:2026.
NOTE 1   Cast materials, HIP and additive manufacturing are not included in this version. Details regarding such materials will be subject to an amendment to or a revision of this European Standard.
NOTE 2   Materials in Groups 51.4 and 54 are not included in this version.

This document specifies requirements for the design, materials, manufacturing and testing of pressure vessels and pressure vessel parts intended for use with a maximum allowable pressure, PS, equal or less than:
-   100 bar when containing gases or liquids in group 1 or 2;
-   1 000 bar when containing liquids in group 2 only
and shell wall thicknesses not exceeding 60 mm, which are constructed of ferritic or austenitic spheroidal graphite cast iron. The thickness limitation of the shell does not apply to thickness of flanges, reinforcements, bosses, etc.
NOTE 1   Austenitic spheroidal graphite cast iron grades are principally used for high and low temperature applications and for their corrosion resistance properties.
NOTE 2   The allowable grades of spheroidal graphite cast iron are listed in Tables 5.1-1 and 5.1-2. Service conditions are given in Clause 4.
This document does not include lamellar graphite cast iron grades for ferritic and austenitic grades, with an elongation after fracture equal or less than 15 % which are explicitly excluded. Requirements for the use of cast irons with an elongation after fracture equal or less than 15 % are given in EN 15776.

This Part of this document specifies the inspection and testing of individual and serially produced pressure vessels made of steels in accordance with EN 13445-2:2021.
Special provisions for cyclic operation are given in Annex G of this Part.
Special provisions for vessels or vessel parts working in the creep range are given in Annex F and Annex I of this Part.
NOTE   The responsibilities of parties involved in the conformity assessment procedures are given in Directive 2014/68/EU. Guidance on this can be found in CR 13445-7.

This document applies to industrial metallic valves for hydrogen use. It contains recommendations and additional requirements applicable to material selection, design, manufacture, and final assessment.
This document addresses the following four services/damage mechanisms, which might exist in combinations:
—   low temperature applications;
—   hydrogen environmental embrittlement (HEE) or hydrogen-induced cracking (HIC);
—   high temperature hydrogen attack (HTHA);
—   hydrogen service with cyclic loads (fatigue).
This document considers the difference between gaseous hydrogen (GH2) and liquid hydrogen (LH2), where necessary.
The additional provisions set out in this document do not cover corrosion such as electro-chemical corrosion of metals under participation of hydrogen (e.g. sour gas).
This document is based on the requirements contained in the standards specified below:
—   applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment, the applicable provisions of EN 16668 apply;
—   additional requirements for valves in chemical and petrochemical applications are specified in EN 12569;
—   additional requirements for valves in gas distribution systems are specified in EN 13774;
—   additional requirements for valves in gas transportation systems are specified in EN 14141.

This document specifies requirements for the design, materials, manufacturing and testing of pressure vessels and pressure vessel parts intended for use with a maximum allowable pressure, PS, equal or less than:
-   100 bar when containing gases or liquids in group 1 or 2;
-   1 000 bar when containing liquids in group 2 only
and shell wall thicknesses not exceeding 60 mm, which are constructed of ferritic or austenitic spheroidal graphite cast iron. The thickness limitation of the shell does not apply to thickness of flanges, reinforcements, bosses, etc.
NOTE 1   Austenitic spheroidal graphite cast iron grades are principally used for high and low temperature applications and for their corrosion resistance properties.
NOTE 2   The allowable grades of spheroidal graphite cast iron are listed in Tables 5.1-1 and 5.1-2. Service conditions are given in Clause 4.
This document does not include lamellar graphite cast iron grades for ferritic and austenitic grades, with an elongation after fracture equal or less than 15 % which are explicitly excluded. Requirements for the use of cast irons with an elongation after fracture equal or less than 15 % are given in EN 15776.

This document specifies requirements for the manufacture of unfired pressure vessels and their parts, made of steels, including their connections to non-pressure parts. It specifies requirements for material traceability, manufacturing tolerances, welding requirements, requirements for permanent joints other than welding, production tests, forming requirements, heat treatment, repairs and finishing operations.

This document specifies requirements for unfired pressure vessels and their parts made of titanium and titanium alloys in addition to the general requirements for unfired pressure vessels under EN 13445-1:2026 to EN 13445-5:2026.
NOTE 1   Cast materials, HIP and additive manufacturing are not included in this version. Details regarding such materials will be subject to an amendment to or a revision of this European Standard.
NOTE 2   Materials in Groups 51.4 and 54 are not included in this version.

This Part of this document specifies requirements for the design of unfired pressure vessels covered by EN 13445-1: 2026 and constructed of steels in accordance with EN 13445-2:2026.
EN 13445-5: 2026, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements.
This Part applies to design of vessels before putting into service. It may be used for in service calculation or analysis subject to appropriate adjustment.

This document defines the terms, definitions, quantities, symbols and units that are used throughout the EN 13445 series and gives general information on the design and manufacturing of vessels under this standard.
It also contains instructions on how to use the standard (Annex A) as well as an index which covers the whole standard (Annex B). This information is aimed to aid users of the EN 13445 series.
This document applies to unfired pressure vessels with a maximum allowable pressure greater than 0,5 bar gauge but may be used for vessels operating at lower pressures, including vacuum.
This document is not applicable to pressure vessels of the following types:
- vessels of riveted construction;
- vessels of lamellar cast iron or any other materials not included in Parts 2, 6, or 8 of the standard;
- multilayered, autofrettaged or pre-stressed vessels.
This document can be applied to the following pressure vessels, provided that account is taken of additional and/or alternative requirements resulting from the hazard analysis and from rules or instructions specific for:
- transportable vessels;
- items specifically designed for nuclear use;
- pressure vessels with a risk of overheating.
NOTE EN 14222 covers electrically fired boilers made from stainless steel and can be used as an example of additional requirements for such vessels.
Other European standards apply to industrial piping (EN 13480 series) and to water tube and shell boilers (EN 12952 series and EN 12953 series).

This Part of this document specifies the inspection and testing of individual and serially produced pressure vessels made of steels in accordance with EN 13445-2:2021.
Special provisions for cyclic operation are given in Annex G of this Part.
Special provisions for vessels or vessel parts working in the creep range are given in Annex F and Annex I of this Part.
NOTE   The responsibilities of parties involved in the conformity assessment procedures are given in Directive 2014/68/EU. Guidance on this can be found in CR 13445-7.

This Part 10 of this document specifies requirements for unfired pressure vessels and their parts made of nickel and nickel alloys (see 3.1) in addition to the general requirements for unfired pressure vessels under EN 13445-1:2026, EN 13445-2:2026, EN 13445-3:2026, EN 13445-4:2026 and EN 13445-5:2026.
NOTE   Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this document.

This document specifies the requirements for steel products used for unfired pressure vessels.
For some metallic materials other than steel, such as spheroidal graphite cast iron, aluminium, nickel, copper, titanium, requirements are or will be formulated in separate parts of this document.
For metallic materials which are not covered by a harmonized material standard and are not likely to be in near future, specific rules are given in this part or the above cited parts of this document.

This document specifies requirements for unfired pressure vessels and their parts made of aluminium and aluminium alloys in addition to the general requirements for unfired pressure vessels under EN 13445:2026 Parts 1 to 5. This document specifies unfired pressure vessels for loads up to 500 full cycles.
NOTE    Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this document.

This Part of this document specifies requirements for the design of unfired pressure vessels covered by EN 13445-1:2021 and constructed of steels in accordance with EN 13445-2:2021+A1:2023.
EN 13445-5:2021, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements.
NOTE   This Part applies to design of vessels before putting into service. It may be used for in service calculation or analysis subject to appropriate adjustment.

This document specifies the requirements for design, manufacture and installation of metal bellows expansion joints with circular cross section for pressure applications with maximum allowable pressure greater than 0,5 bar.

This document specifies the requirements for design, manufacture and installation of metal bellows expansion joints with circular cross section for pressure applications with maximum allowable pressure greater than 0,5 bar.

This document specifies requirements for qualification testing of welding procedure specifications (WPSs) for electron or laser beam welding.
This document applies to metallic materials, irrespective of the shape of the parts, their thicknesses, the manufacturing method (e.g. rolling, forging, casting, sintering) or their heat treatment. It covers both the production of new parts and repair work.

This document specifies the technical delivery requirements for seamless and welded butt welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of carbon and alloy steel in two test categories which are intended for pressure purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission and distribution of fluids and gases.
It specifies:
a)   type of fittings;
type A: Butt-welding fittings with reduced pressure factor;
type B: Butt-welding fittings for use at full service pressure;
b)   steel grades and their chemical compositions;
c)   mechanical properties;
d)   dimensions and tolerances;
e)   requirements for inspection and testing;
f)   inspection documents;
g)   marking;
h)   protection and packaging.
NOTE   The selection of the appropriate fitting (material, thickness) is the ultimate responsibility of the manufacturer of the pressure equipment (see European Legislation for Pressure Equipment). In the case of a harmonized 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 item of equipment. Consequently, it is essential that the technical data stated in the material standard be assessed against the design requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied.

This document specifies the technical delivery requirements for seamless and welded butt welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of carbon and alloy steel in two test categories which are intended for pressure purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission and distribution of fluids and gases.
It specifies:
a)   type of fittings;
type A: Butt-welding fittings with reduced pressure factor;
type B: Butt-welding fittings for use at full service pressure;
b)   steel grades and their chemical compositions;
c)   mechanical properties;
d)   dimensions and tolerances;
e)   requirements for inspection and testing;
f)   inspection documents;
g)   marking;
h)   protection and packaging.
NOTE   The selection of the appropriate fitting (material, thickness) is the ultimate responsibility of the manufacturer of the pressure equipment (see European Legislation for Pressure Equipment). In the case of a harmonized 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 item of equipment. Consequently, it is essential that the technical data stated in the material standard be assessed against the design requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied.

This European Standard specifies the following materials for the pressure bearing parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments (non pressure bearing parts):
—   flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
—   tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
—   forgings and cast products ;
—   bolting materials;
—   welding consumables.

This document specifies ranges, construction, performances, output characteristics and testing of rotary displacement gas meters (hereinafter referred to as RD meters or simply meters) for gas volume measurement.
This document applies to rotary displacement gas meters used to measure the volume of fuel gases of at least the 1st, 2nd and 3rd gas families, the composition of which is specified in EN 437:2021, at a maximum working pressure up to and including 20 bar over an ambient and gas temperature range of at least −10 °C to +40 °C.
This document applies to meters that are installed in locations with vibration and shocks of low significance (class M1) and in
-   closed locations (indoor or outdoor with protection) with condensing or with non-condensing humidity
or,
-   open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity,
and in locations with electromagnetic disturbances (class E1 and E2). The standard applies to mechanical meters with mechanical index, electronic devices are not covered by this standard.
Unless otherwise specified in this standard:
-   all pressures used are gauge;
-   all influence quantities, except the one under test, are kept relatively constant at their reference value.
This document applies to meters with a maximum allowable pressure PS and the volume V of less than 6 000 bar · L or with a product of PS and DN of less than 3 000 bar.
This document is to be used for both pattern approval and individual meter testing. Cross-reference tables are given in:
-   Annex A for the tests that need to be undertaken for pattern approval;
-   Annex B for individual meter testing.
Some parts of this standard cover meters with mechanical index only.
The risk philosophy adopted in this standard is based on the analysis of hazards including pressure. The standard applies principles to eliminate or reduce hazards. Where these hazards cannot be eliminated appropriate protection measures are specified.

This document applies to shell boilers with volumes in excess of 2 l for the generation of steam and/or hot water at a maximum allowable pressure greater than 0,5 bar and with a temperature in excess of 110 °C.
For the purpose of this document the following pressurized parts are included:
—   the shell boiler as one entity of pressure equipment including all the pressure parts from the feedwater/hot water inlet (including the inlet valve) up to and including the steam/hot water outlet (including the outlet valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header);
—   all superheaters, economizers and interconnecting piping;
—   additionally, the piping that is connected to the boiler involved in services such as draining, venting, desuperheating, etc., up to the first isolating valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header/piping.
This document does not apply to the following types of boilers and equipments:
a)   water-tube boilers;
b)   non stationary boilers, e.g. locomotive boilers;
c)   thermal oil boilers;
d)   boilers where the main pressure housing is made of cast material;
e)   pumps, gaskets, etc;
f)   brickwork setting and insulation, etc.
NOTE 1   Further information on shell boilers is given in Annex A.
NOTE 2   Stainless steel boilers are covered by EN 14222:2021.

This document specifies requirements for qualification testing of welding procedure specifications (WPSs) for electron or laser beam welding.
This document applies to metallic materials, irrespective of the shape of the parts, their thicknesses, the manufacturing method (e.g. rolling, forging, casting, sintering) or their heat treatment. It covers both the production of new parts and repair work.

This document applies to shell boilers with volumes in excess of 2 l for the generation of steam and/or hot water at a maximum allowable pressure greater than 0,5 bar and with a temperature in excess of 110 °C.
For the purpose of this document the following pressurized parts are included:
—   the shell boiler as one entity of pressure equipment including all the pressure parts from the feedwater/hot water inlet (including the inlet valve) up to and including the steam/hot water outlet (including the outlet valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header);
—   all superheaters, economizers and interconnecting piping;
—   additionally, the piping that is connected to the boiler involved in services such as draining, venting, desuperheating, etc., up to the first isolating valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header/piping.
This document does not apply to the following types of boilers and equipments:
a)   water-tube boilers;
b)   non stationary boilers, e.g. locomotive boilers;
c)   thermal oil boilers;
d)   boilers where the main pressure housing is made of cast material;
e)   pumps, gaskets, etc;
f)   brickwork setting and insulation, etc.
NOTE 1   Further information on shell boilers is given in Annex A.
NOTE 2   Stainless steel boilers are covered by EN 14222:2021.

This document specifies ranges, construction, performances, output characteristics and testing of rotary displacement gas meters (hereinafter referred to as RD meters or simply meters) for gas volume measurement.
This document applies to rotary displacement gas meters used to measure the volume of fuel gases of at least the 1st, 2nd and 3rd gas families, the composition of which is specified in EN 437:2021, at a maximum working pressure up to and including 20 bar over an ambient and gas temperature range of at least −10 °C to +40 °C.
This document applies to meters that are installed in locations with vibration and shocks of low significance (class M1) and in
-   closed locations (indoor or outdoor with protection) with condensing or with non-condensing humidity
or,
-   open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity,
and in locations with electromagnetic disturbances (class E1 and E2). The standard applies to mechanical meters with mechanical index, electronic devices are not covered by this standard.
Unless otherwise specified in this standard:
-   all pressures used are gauge;
-   all influence quantities, except the one under test, are kept relatively constant at their reference value.
This document applies to meters with a maximum allowable pressure PS and the volume V of less than 6 000 bar · L or with a product of PS and DN of less than 3 000 bar.
This document is to be used for both pattern approval and individual meter testing. Cross-reference tables are given in:
-   Annex A for the tests that need to be undertaken for pattern approval;
-   Annex B for individual meter testing.
Some parts of this standard cover meters with mechanical index only.
The risk philosophy adopted in this standard is based on the analysis of hazards including pressure. The standard applies principles to eliminate or reduce hazards. Where these hazards cannot be eliminated appropriate protection measures are specified.

This European Standard specifies the following materials for the pressure bearing parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments (non pressure bearing parts):
—   flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
—   tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
—   forgings and cast products ;
—   bolting materials;
—   welding consumables.

This document specifies the material requirements and testing procedures applicable to wrought and cast aluminium and aluminium alloys intended for use in the production of pressure equipment.
This document covers:
-   the products forms, grades and tempers of wrought and cast aluminium and aluminium alloys which are used for such applications together with data for wrought and cast alloys over their permissible working temperature ranges;
-   the technical conditions for inspection and delivery, mechanical property limits and tolerances on form and dimensions by reference to the appropriate European standards for the relevant wrought and cast aluminium and aluminium alloys;
-   additional requirements which are specific to pressure equipment applications.
It applies to hot-rolled plate, cold-rolled sheet/strip/circles, extruded or extruded and cold drawn rod/bar, tube, extruded open/hollow profiles, forgings and castings. Considering this, this document is intended to be used in conjunction with the EN 573 series, EN 485 series, EN 941, EN 754 series, EN 755 series, EN 586 series and EN 1706. The materials and application ranges covered by this document are those given in Annex A, Table A.1 for wrought alloys and Table A.2 for castings.
The objective of this document is to only cover the materials used for components of pressure equipment. Fabrication or fabrication methods for pressure equipment are excluded from this document.

This document specifies how a preliminary welding procedure specification (pWPS) is qualified by welding procedure tests.
This document applies to production welding, repair welding and build-up welding.
This document defines the conditions for the execution of welding procedure tests and the range of qualification for welding procedures for all practical welding operations within the qualification of this document.
This document applies to the arc welding of wrought and cast aluminium and its alloys. In this document the term aluminium stands for aluminium and for aluminium alloys.
This document does not apply to finishing welding of aluminium castings, which is addressed in ISO 15614-4.
Arc welding of aluminium is covered by the following welding processes in accordance with ISO 4063:2023:
131 — MIG welding with solid wire electrode;
141 — TIG welding with solid filler material (wire/rod);
142 — Autogenous TIG welding;
15 — plasma arc welding.

This document specifies requirements for the specification and qualification of brazing procedures for brazing of metallic materials.
This document specifies requirements for brazing of the test piece, testing of the test specimen, essential variables and their range of qualification, acceptance criteria, brazing procedure qualification record (BPQR) and brazing procedure specification (BPS).
This document gives general provisions on quality requirements for brazing (see Annex A).
This document does not cover testing of residual stresses, corrosion resistance and impact properties.
This document applies to the following brazing processes according to ISO 857-2 and ISO 4063:2009 with local and global heating:
—    911 Infrared brazing;
—    912 Flame brazing, torch brazing;
—    913 Laser beam brazing;
—    914 Electron beam brazing;
—    916 Induction brazing;
—    918 Resistance brazing;
—    919 Diffusion brazing;
—    921 Furnace brazing;
—    922 Vacuum brazing;
—    923 Dip-bath brazing;
—    924 Salt-bath brazing;
—    925 Flux bath brazing;
—    926 Immersion brazing;
—    972 Arc weld brazing.
The principles of this document can be applied to other brazing processes and brazing of materials not listed.

This document specifies how a preliminary welding procedure specification is qualified based on a pre-production welding test.
This document is applicable to arc welding, gas welding, beam welding, resistance welding, stud welding and friction welding of metallic materials.

This document specifies the material requirements and testing procedures applicable to wrought and cast aluminium and aluminium alloys intended for use in the production of pressure equipment.
This document covers:
-   the products forms, grades and tempers of wrought and cast aluminium and aluminium alloys which are used for such applications together with data for wrought and cast alloys over their permissible working temperature ranges;
-   the technical conditions for inspection and delivery, mechanical property limits and tolerances on form and dimensions by reference to the appropriate European standards for the relevant wrought and cast aluminium and aluminium alloys;
-   additional requirements which are specific to pressure equipment applications.
It applies to hot-rolled plate, cold-rolled sheet/strip/circles, extruded or extruded and cold drawn rod/bar, tube, extruded open/hollow profiles, forgings and castings. Considering this, this document is intended to be used in conjunction with the EN 573 series, EN 485 series, EN 941, EN 754 series, EN 755 series, EN 586 series and EN 1706. The materials and application ranges covered by this document are those given in Annex A, Table A.1 for wrought alloys and Table A.2 for castings.
The objective of this document is to only cover the materials used for components of pressure equipment. Fabrication or fabrication methods for pressure equipment are excluded from this document.

This document specifies how a preliminary welding procedure specification (pWPS) is qualified by welding procedure tests.
This document applies to production welding, repair welding and build-up welding.
This document defines the conditions for the execution of welding procedure tests and the range of qualification for welding procedures for all practical welding operations within the qualification of this document.
This document applies to the arc welding of wrought and cast aluminium and its alloys. In this document the term aluminium stands for aluminium and for aluminium alloys.
This document does not apply to finishing welding of aluminium castings, which is addressed in ISO 15614-4.
Arc welding of aluminium is covered by the following welding processes in accordance with ISO 4063:2023:
131 — MIG welding with solid wire electrode;
141 — TIG welding with solid filler material (wire/rod);
142 — Autogenous TIG welding;
15 — plasma arc welding.

This document specifies how a preliminary welding procedure specification is qualified based on a pre-production welding test.
This document is applicable to arc welding, gas welding, beam welding, resistance welding, stud welding and friction welding of metallic materials.

This document specifies requirements for electrically heated steam boilers manufactured from stainless steel specifically dedicated for generating steam for sterilizers and disinfectors.
This document covers only steam boilers that are heated by immersion heaters and which have a maximum allowable pressure (PS) of not greater than 6 bar, a maximum volume (V) of 1 000 litres and a product of PS ∙ V not greater than 3 000 bar ∙ l.

This document specifies requirements for the specification and qualification of brazing procedures for brazing of metallic materials.
This document specifies requirements for brazing of the test piece, testing of the test specimen, essential variables and their range of qualification, acceptance criteria, brazing procedure qualification record (BPQR) and brazing procedure specification (BPS).
This document gives general provisions on quality requirements for brazing (see Annex A).
This document does not cover testing of residual stresses, corrosion resistance and impact properties.
This document applies to the following brazing processes according to ISO 857-2 and ISO 4063:2009 with local and global heating:
—    911 Infrared brazing;
—    912 Flame brazing, torch brazing;
—    913 Laser beam brazing;
—    914 Electron beam brazing;
—    916 Induction brazing;
—    918 Resistance brazing;
—    919 Diffusion brazing;
—    921 Furnace brazing;
—    922 Vacuum brazing;
—    923 Dip-bath brazing;
—    924 Salt-bath brazing;
—    925 Flux bath brazing;
—    926 Immersion brazing;
—    972 Arc weld brazing.
The principles of this document can be applied to other brazing processes and brazing of materials not listed.

This document specifies requirements for electrically heated steam boilers manufactured from stainless steel specifically dedicated for generating steam for sterilizers and disinfectors.
This document covers only steam boilers that are heated by immersion heaters and which have a maximum allowable pressure (PS) of not greater than 6 bar, a maximum volume (V) of 1 000 litres and a product of PS ∙ V not greater than 3 000 bar ∙ l.

This document specifies requirements for qualification of welding operators and weld setters for mechanized and automatic welding of metallic materials.
This document does not apply to personnel who:
—     do not control or adjust welding parameters;
—     are not involved in the setup of welding equipment.
Qualification of welding operators and weld setters for friction stir welding and friction stir spot welding are covered by ISO 25239-3 and ISO 18785-3, respectively.

This document specifies the technical delivery requirements for seamless and welded butt-welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic-ferritic (duplex) stainless steel in two test-categories which are intended for pressure purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission and distribution of fluids and gases.
It specifies:
a)   type of fittings;
1)   type A: butt-welding fittings with reduced pressure factor;
2)   type B: butt-welding fittings for use at full service pressure;
b)   steel grades and their chemical compositions;
c)   mechanical properties;
d)   dimensions and tolerances;
e)   requirements for inspection and testing;
f)   inspection documents;
g)   marking;
h)   protection and packaging.
NOTE   The selection of the appropriate fitting (material, thickness) is the ultimate responsibility of the manufacturer of the pressure equipment (see European Legislation for Pressure Equipment). In the case of a harmonized 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 item of equipment. Consequently, it is essential that the technical data stated in the material standard be assessed against the design requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied.

This document specifies requirements for qualification of welding operators and weld setters for mechanized and automatic welding of metallic materials.
This document does not apply to personnel who:
—     do not control or adjust welding parameters;
—     are not involved in the setup of welding equipment.
Qualification of welding operators and weld setters for friction stir welding and friction stir spot welding are covered by ISO 25239-3 and ISO 18785-3, respectively.

The existing Annex ZB is still incorrectly referring to the old 97/23/EC Directive. Reference should be made to Directive 2014/68/EU for pressure equipment. To be done via this WI.

The existing Annex ZB is still incorrectly referring to the old 97/23/EC Directive. Reference should be made to Directive 2014/68/EU for pressure equipment. To be done via this WI.

This document specifies the requirements for the design, manufacture and testing of cylinders, tubes and other pressure vessels of steel, stainless steel, aluminium alloys or of non-metallic construction material. These are intended for the stationary storage of gaseous hydrogen of up to a maximum water capacity of 10 000 l and a maximum allowable working pressure not exceeding 1 100 bar, of seamless metallic construction (Type 1) or of composite construction (Types 2, 3 and 4), hereafter referred to as pressure vessels.
NOTE   Additional requirements with regard to assemblies (manifolded cylinders and tubes and other pressure vessels) are not covered by this document.
This document is not applicable to Type 2 and 3 vessels with welded liners.
This document is not applicable to pressure vessels used for solid, liquid hydrogen or hybrid cryogenic-high pressure hydrogen storage applications.
This document is not applicable to external piping which can be designed according to recognized standards.

This document is applicable to metallic valves as pressure accessories for industrial applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment and specifies requirements applicable to design, manufacture, testing, materials and documentation.
All essential safety requirements of the European legislation for pressure equipment applicable to valves have been taken into consideration and are addressed in this document.
This document does not apply to:
-   safety valve and bursting disc (safety accessories),
-   sight glass with its frames (component of a pressure equipment), and
-   measurement chambers.
For other exclusions, refer to the European legislation for pressure equipment [60].