Unfired pressure vessels General
BS EN 13445-1:2021 pdf free.Unfired pressure vessels General.
main pressure bearing parts parts which constitute the envelope under pressure, essential for the integrity of the equipment.
manufacturer individual or organization responsible for the design, fabrication, testing, installation where relevant, and compliance with the requirements of the relevant product standard, whether executed by him or a subcontractor.
Note 1 to entry: The manufacturer can subcontract one or more of the above mentioned tasks under its responsibility.
material manufacturer individual or organization that produces material in the basic product form used in the manufacture of pressure components.
maximum allowable pressure PS maximum pressure for which the pressure vessel is designed as specified by the manufacturer.
maximum allowable temperature maximum temperature for which the pressure vessel is designed as specified by the manufacturer.
minimum allowable temperature TSmEn minimum temperature for which the pressure vessel is designed as specified by the manufacturer.
pipelines piping or system of piping designed for the conveyance of any fluid or substance to or from an installation (onshore or offshore) starting from and including the first isolation device located within the installation and including all the annexed equipment designed specifically for pipelines.
piping tubing, fittings, expansion joints, hoses or other pressurebearing components, intended for the transport of fluid, connected together and integrated into a pressure system.
pressure vessel housing and its direct attachments up to the coupling point connecting it to other equipment, designed and built to contain fluids under pressure.
required thickness
thickness excluding corrosion or any other allowances specified in the EN 13445 series
Note ito entry: The minimum thickness that the component can have in service to fulfil the standard.
risk combination of the probability of occurrence of harm and the severity of that harm.
significant hazard hazard which has been identified as associated with the pressure vessel and which requires specific action by the designer to eliminate or to reduce the risk according to the risk assessment.
testing factor reduction factor taking into account the amount of NDT testing in castings, applied on the nominal design stress to take account of possible manufacturing deficiencies.
testing group grouping which determines the appropriate level of non-destructive testing (NDT) on a welded joint.
Note 1 to entry: The testing group of a vessel is not linked to the hazard category.
weldment weld metal, heat affected zone and adjacent base material(s)
4 Interdependency of the parts of the series
Parts 2 to 6 and pact4parts 8 and 10 of EN 13445, together with Part 1. form a consistent set of specifications which shall be followed for compliance to the standard.
NOTE Parts 7 and 9 of this series are published as a CEN Report and a CEN Technical Report respectively. They are not European Standards.
5 Quantities, symbols and units
Quantities, symbols and units to be used for pressure equipment shall be in accordance with Tables and 5-2 and EN 764-2:2012.
Pressure vessels according to this European Standarddocu.ment shall be designed, constructed, installed and equipped under consideration of all significant hazards and risks that may arise when the vessel is erected, tested and operated in accordance with the manufacturer’s instructions or else are reasonably foreseeable.
Such hazards shall be analysed by the manufacturer prior to designing the vessel. Apart from normal hazards connected to the operation of the vessel (see EN 13445-3:2014[N 13445-3:2021, 5.3), the following hazards shall be considered (as applicable):
— COITOSIOfl and chemical attack;
— wear;
— external fire;
— reasonably foreseeable misuse of the vessel.
6.2 Hazard removal and risk reduction
6.2.1 General
As far as practically feasible, the vessel shall be designed as to remove or reduce the respective risk. If removal of a certain hazard is not feasible, the vessel shall be designed and equipped to protect against the respective risk or (as a final measure) information be given on the hazard and what measures are to be taken to reduce the risks from the hazard. Such information shall be given through warning signs and in the operating instructions.
NOTE The procedure to follow is outlined in Figure 6.2-1.
6.2.2 Design considerations
If it is envisaged that safety accessories will have to be fitted to the vessel, the vessel shall be equipped with the necessary connections for such accessories.
NOTE The selection, application and installation of safety related accessories intended to protect pressure vessels during operation are covered in EN 764-7:2002.BS EN 13445-1 pdf free download.Unfired pressure vessels General