The Pressure Equipment Directive (PED) 2014/68/EU establishes the requirements for the design, manufacture, and conformity assessment of pressure equipment and assemblies with a maximum allowable pressure greater than 0.5 bar. Understanding the correct PED category for your equipment is crucial for compliance and safety.
What is PED Categorization?
PED categorization determines the level of conformity assessment required for pressure equipment based on several factors including the type of equipment, fluid group, fluid state, design pressure, and either volume (for vessels) or nominal size (for piping). The categories range from Sound Engineering Practice (SEP) to Category IV, with higher categories requiring more rigorous conformity assessment procedures.
Key Factors in PED Classification
- —Equipment Type: Vessels or Piping systems
- —Fluid Group: Group 1 (dangerous fluids) or Group 2 (other fluids)
- —Fluid State: Gas or Liquid
- —Design Pressure: Maximum pressure for which the equipment is designed (bar)
- —Volume/Nominal Size: Internal volume (L) for vessels or nominal size DN (mm) for piping
Understanding Fluid Groups
Group 1 fluids are considered dangerous and include explosive, highly flammable, flammable, toxic, or oxidizing substances. Group 2 fluids encompass all other fluids not classified as Group 1. The fluid group significantly impacts the PED category determination, with Group 1 fluids generally requiring more stringent conformity assessment.
Use the Calculator Below
Our interactive PED Category Quick Check Calculator helps you quickly determine the appropriate PED category and conformity assessment module for your pressure equipment. Simply enter your equipment specifications and receive instant results based on PED 2014/68/EU Annex II tables.
PED 2014/68/EU — Annex II hazard category determination
Maximum allowable pressure. Equipment with PS ≤ 0.5 bar is outside PED scope.
Conformity Assessment Modules
Once the PED category is determined, the appropriate conformity assessment module must be selected. Different categories allow different module options:
- —SEP: No specific conformity assessment required, but must follow sound engineering practice
- —Category I: Module A (internal production control)
- —Category II: Module A1, D1, or E1
- —Category III: Module B+D, B+F, G, or H1
- —Category IV: Module B+D, B+F, G, or H1 (with additional requirements)
Need Expert Assistance?
While this calculator provides a quick reference for PED categorization, complex equipment or special cases may require expert consultation. GLENT's engineering specialists have extensive experience with pressure equipment design, PED compliance, and certification processes across various industries including nuclear energy production, manufacturing, and process engineering.
Looking for PED Compliance Support?
Our team of qualified engineers can assist with PED categorization, design review, conformity assessment, and certification processes. Contact us to discuss your pressure equipment requirements.
Contact Our Engineering TeamReferences
- —Directive 2014/68/EU of the European Parliament and of the Council
- —PED 2014/68/EU Annex II - Conformity Assessment Procedures
- —PED 2014/68/EU Article 2 - Definitions
- —PED 2014/68/EU Article 13 - Fluid Groups
