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PED Professional 6

Pressure Equipment

Guide, Step by Step through the Directive 97/23/EC

Guide through the Directive 97/23/EC
 Step by Step though the Directive 97/23/EC 
Informations to Operation
Preparation of Examination
Flow Chart
Flow Chart

Flow chart pertaining to the Pressure Equipment Directive (PED)

Basic Structure:

Article 1

Scope
Pfeil-rechts

p > 0.5 bar
Paragraph 3.1 - 3.2.1

 

Pfeil      
classification
Pfeil-rechts

Group 1 or Group 2

 
Pfeil      
requirements
Pfeil-rechts

Engineering practice
Article 3, paragraph 3

 
Pfeil      
category
Pfeil-rechts

Diagrams, Annex II

 
Pfeil      

Article 10
Annex II

module
Pfeil-rechts

Depending on
categorie



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Classification
Classification

Classification of Pressure Equipment according to Pressure Equipment Directive ?

Pressure equipment is assigned to categories (I-IV) according to its risk potential as illustrated in the diagrams contained in Annex II. The risk potential is defined by:

     
  • the medium's state of aggregation (gaseous, liquid) and its steam pressure
  •  
  • the medium's type and nature of the risk (e.g. toxic, flammable, explosive)
  •  
  • the stored energy (PS x V; PS x DN)

Example: A pressure vessel containing 100 l of a harmless medium is to be classified for a pressure of PS = 12 bar. The vessel must thus be suitable for media group 2. The medium's state of aggregation is gaseous. The product of pressure and content PS x V is 1200. According to the Pressure Equipment Directive, diagram 2 of Annex II applies.



PS = 12 bar, V = 100 liters, PS x V = 1200

The diagram shows that the vessel must be assigned to category III.

For further assistance re category determination in line with the Pressure Equipment Directive; see:

The modules can be described as self-contained test packages addressing the development and production phases of pressure equipment with the goal of furnishing evidence that the basic requirements of the directive have been satisfied. Since not every module covers the development and production phases, module combinations can also be used.

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Test Module
Test Module

Which test module should be used ? 

There are test modules or test-module combinations for every category. Manufacturers can choose freely from among these modules, e.g. depending on their QA systems.

The modules can be described as self-contained test packages addressing the development and production phases of pressure equipment with the goal of furnishing evidence that the basic requirements of the directive have been satisfied. Since not every module covers the development and production phases, module combinations can also be used.

Cat.
I

A
International production control
Module A

Cat.
II

A1
Internal manufacturing checks with monitoring
Module A 1

E1
Product QA
Module E 1

D1
Production QA
Module D 1

Cat.
III

B+C1
Conformity to type
ModuleB / Module C 1

B1+F
Product verification
Module B 1 / Module F

B1+D
Production QA
Module B 1 / Module D

B+E
Product QA
Module B / Module E

H
Full QA
Module H

Cat.
IV

G
Unit verification
Module G

B+F
Product verification
Module B / Module F

B+D
Production QA
Module B / Module D

H1
Full QA and design examination + surveillance
Module H 1

 

 

 

 

 

 

 

without QA system

 

 

with QA system

 


In terms of content, the modules consist of the following three main points:

  • Description of the procedure by which the manufacturer ensures and declares that the respective pressure equipment conforms with the requirements of the directive
  • Definition of the tests and surveillance measures to be carried out by a notified body
  • Definition of the documents and documentation to be prepared

The modular approach of the Pressure Equipment Directive means the higher the risk potential of pressure equipment, i.e. the higher the category to which it is assigned, the greater the involvement of the notified body specified in the corresponding test module. The notified body is involved in all modules except for module A, "Internal Production Control", which is applied to category I pressure equipment. Test modules assigned to a higher category can be applied to pressure equipment of a lower category (downward compatibility), but not vice versa.



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Requirements
Requirements

Personnel and Operational Requirements

Persönliche und betriebliche Voraussetzungen

Die Zertifizierung einer Schweißaufsichtsperson (SAP) erfolgt nach DIN EN ISO 14731.

Eine Zertifizierung der Schweißaufsichtsperson ist nicht zwingend vorgeschrieben, erleichtert jedoch den Zertifizierungsprozess nach DIN EN ISO 3834.

Schweißarbeiten an Druckgeräten der Kategorien II bis IV dürfen nur von Personen ausgeführt werden, die für die jeweilige Aufgabe geeigent und entsprechend zertifiziert sind (z.B. nach DIN EN 287, DIN EN ISO 9606, DIN EN 1418).

Zerstörungsfreie Prüfungen an dauerhaften Verbindungen an Druckgeräten dürfen nur von qualifiziertem Personal mit angemessener Befähigung gemäß EN ISO 9712-2012 ausgeführt werden. Bei Druckgeräten der Kategorien III und IV muss die Qualifikation des Prüfpersonals durch eine anerkannte unabhängige Prüfstelle zertifiziert werden.

Betriebliche Voraussetzungen

Der Hersteller muss die sachkundige Ausführung von Schweißarbeiten sicherstellen. Dies kann z. B. durch Anwendung der einschlägigen Normen oder des AD 2000-Regelwerkes erfolgen.


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Materials
Materials

What materials can be used ? 

According to former regulations, the use of materials in steam-boiler, pressure-vessel and pipeline manufacturing was governed by the relevant Technical Rules such as TRD, AD codes of practice, TRR. The approved qualities and their scopes of application are described in these documents.

According to the Pressure Equipment Directive, only materials could be used

  • that is conform to a harmonized standard
  • for which a European material approval is available, and
  • which have been individually inspected

With respect to materials use, AD-2000 contains similar regulations to those of previous AD codes of practice of the W (materials) series. The materials listed there are regarded as individually inspected.

An official individual inspection as per Pressure Equipment Directive must be carried out within the scope of document review. In the modules covering the QA system, the materials used by the manufacturer must be subjected to individual inspection and a certificate of such inspection issued by the notified body in addition to its evaluation of the QA system.

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Aids/Tools/Material.



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Technical Rules
Technical Rules

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What Technical Rules have to apply ?

In line with Article 5 of the Pressure Equipment Directive (PED), conformity is assumed when harmonized standards are used, i.e. the requirements outlined in Annex I of the Pressure Equipment Directive are regarded as satisfied.

Since the application of harmonized standards is not mandatory, manufacturers may also opt for other solutions to satisfy the requirements of Annex I of the Pressure Equipment Directive.





For this reason, internationally recognized codes of practice such as the AD codes of practice, BS 5500, CODAP were revised with respect to their application within the scope of the Pressure Equipment Directive.



See also our Service for Regulations for Pressure Equipment