Pressure Equipment Directive
Encyclopedia
The Pressure Equipment Directive 97/23/EC (PED) of the EU sets out the standards
for the design and fabrication
of pressure
equipment ("pressure equipment" means steam boilers, pressure vessel
s, piping
, safety valve
s and other components and assemblies subject to pressure loading) generally over one litre
in volume and having a maximum pressure more than 0.5 bar
gauge. It also sets the administrative procedures requirements for the "conformity assessment" of pressure equipment, for the free placing on the European market without local legislative barriers. It has been mandatory throughout the EU since 30 May 2002. This is enacted in the UK
as the Pressure Equipment Regulations (PER).
Standardization
Standardization is the process of developing and implementing technical standards.The goals of standardization can be to help with independence of single suppliers , compatibility, interoperability, safety, repeatability, or quality....
for the design and fabrication
Fabrication (metal)
Fabrication as an industrial term refers to building metal structures by cutting, bending, and assembling. The cutting part of fabrication is via sawing, shearing, or chiseling ; torching with handheld torches ; and via CNC cutters...
of pressure
Pressure
Pressure is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure.- Definition :...
equipment ("pressure equipment" means steam boilers, pressure vessel
Pressure vessel
A pressure vessel is a closed container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.The pressure differential is dangerous and many fatal accidents have occurred in the history of their development and operation. Consequently, their design,...
s, piping
Piping
Within industry, piping is a system of pipes used to convey fluids from one location to another. The engineering discipline of piping design studies the efficient transport of fluid....
, safety valve
Safety valve
A safety valve is a valve mechanism for the automatic release of a substance from a boiler, pressure vessel, or other system when the pressure or temperature exceeds preset limits....
s and other components and assemblies subject to pressure loading) generally over one litre
Litre
pic|200px|right|thumb|One litre is equivalent to this cubeEach side is 10 cm1 litre water = 1 kilogram water The litre is a metric system unit of volume equal to 1 cubic decimetre , to 1,000 cubic centimetres , and to 1/1,000 cubic metre...
in volume and having a maximum pressure more than 0.5 bar
Bar (unit)
The bar is a unit of pressure equal to 100 kilopascals, and roughly equal to the atmospheric pressure on Earth at sea level. Other units derived from the bar are the megabar , kilobar , decibar , centibar , and millibar...
gauge. It also sets the administrative procedures requirements for the "conformity assessment" of pressure equipment, for the free placing on the European market without local legislative barriers. It has been mandatory throughout the EU since 30 May 2002. This is enacted in the UK
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
as the Pressure Equipment Regulations (PER).
Contents
- Scope and Definitions (including excemptions of its scope)
- Market suveillance
- Technical requirements: classification of pressure equipment according to type and content.
- Free movement
- Presumption of conformity
- Committee on technical standards and regulations
- Committee on Pressure Equipment
- Safeguard clause
- Classification of pressure equipment
- Conformity assessment
- European approval for materials
- Notified bodies
- Recognized third-party organizations
- User inspectorates
- CE marking
- Unduly affixed CE marking
- International cooperation
- Decisions entailing refusal or restriction
- Repeal
- Transposition and transitional provisions
- Addressees of the Directive: the EU member states for implementation in national laws and/or regulations.
- Annex I: Essential safety requirements
- General
- Design
- Manufacturing
- Materials
- Fired or otherwise heated pressure equipment with a risk of overheatinf (article 3.1)
- Piping
- Specifc quantitative requirements for certain pressure equipment
- Appendix II: Conformity assessment tables. Actually diagrams of pressure vs. volume (or diameter for pipes), for classification of equiment in four classes.
- Appendix III: Conformity assessment procedures
- Appendix IV: Minimum criteria to be met when designationg the notified bodies (article 12) and the recognized third party organizations (article 13)
- Appendix V: Criteria to be met when authorizing user inspectorates (article 14)
- Appendix VI: CE marking
- Appendix VII: Declaration of conformity