BS EN 13121-3:2008 + Amendment 1:2010 GRP tanks and vessels for use above ground. Design and workmanship
BS EN 13121-3 is a European standard which gives requirements for the design, fabrication, inspection, testing and verification of glass reinforced plastic (GRP) tanks and vessels. It applies to GRP vessel with or without Thermoplastics lining, for storage or processing of fluids, factory made or site built, non pressurised or pressurised up to 10 bar, for use above ground.
BS EN 13121-3 covers vessels and tanks subject to temperatures between – 40 °C and + 120 °C.
BS EN 13121 Part 3 covers those tanks with a working pressure up to 10 bar for above ground use only. The standard was prepared under the European Commission Mandate 83/139/EEC the Pressure Equipment Directive (PED). In Europe this has been in force since May 2002 and all organizations in the European Union are obliged to comply with it.
The design and manufacture of GRP (glass-reinforced plastic) tanks and vessels involve a number of different materials in a lamina design. As a result there are many possible combinations of reinforcement type that will meet the structural requirement for the application of the tank. This allows the designer to select the laminate construction best suited to the available manufacturing facilities and hence be most cost effective
With the publication of BS EN 13121-3, BS 4994:1987 Specification for design and construction of vessels and tanks in reinforced plastics is declared obsolescent, which will still cover those tanks still in service as tanks made from GRP are generally accepted to have a long working life.
Contents of BS EN 13121-3:
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Information and requirements to be supplied and to be documented
6 Material
7 Mechanical properties
8 Determination of design strain and loadings
9 Design
10 Design analysis
11 Bolted flange connections
12 Supports
13 Structures and fittings
14 Local load analysis
15 Quality control
16 Site built tanks and vessels
17 Marking
Annex A (informative) Product testing for volume or batch production process
Annex B (informative) Derivation of laminate properties from lamina properties
Annex C (normative) Pressure and leak testing
Annex D (normative) Methods of tests
Annex E (normative) Approval testing of laminators
Annex F (normative) Approval testing of welders
Annex G (informative) Loading from local loads - Methods of calculation
Annex H (informative) Design method for filament wound laminates
Annex I (normative) Pre-moulded flanges technical requirements
Annex J (informative) Shells subjected to wind loading value from metallic codes
Annex K (informative) Horizontal vessel design
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC
Bibliography
The other parts of this standard are also available:
BS EN 13121-1:2003 GRP tanks and vessels for use above ground. Raw materials. Specification conditions and acceptance conditions
BS EN 13121-2:2003 GRP tanks and vessels for use above ground. Composite materials. Chemical resistance
BS EN 13121-4:2005 GRP tanks and vessels for use above ground. Delivery, installation and maintenance
For more information: Pressure Equipment Directive (PED)
