Cookware - Pressure cookers for domestic use

This standard defines terms, establishes manufacturing, safety und functioning requirements and corresponding tests, and specifies data for marking, labelling and notice, for pressure cookers. This standard is applicable to pressure cookers for domestic use, portable, with gross volume up to 25 l , with working pressure over 4 kPa and less than 150 kPa, either with integrated or independant heating.

Dampfdruckkochtöpfe

Diese Europäische Norm definiert Bedingungen, legt Anforderungen an die Herstellung, Sicherheit und Funktion und zugehörige Prüfungen fest und spezifiziert Daten für die Kennzeichnung, Etikettierung und Hinweise für Dampfdruckkochtöpfe.
Diese Norm gilt nicht für ortsfeste Dampfdruckkochtöpfe für den Haushaltsgebrauch mit einem Nennfassungsvermögen bis 25 l, einem Arbeitsdruck über 4 kPa und max. 150 kPa, entweder mit integrierter oder mit externer Beheizung.
ANMERKUNG   Alle Drücke, die in dieser Norm erwähnt sind, beziehen sich auf den atmosphärischen Druck.

Articles culinaires a usage domestique - Autocuiseurs a usage domestique

La présente Norme européenne définit les termes, fixe les prescriptions de construction, de sécurité et de fonctionnement et les essais correspondants et prescrit les données relatives au marquage, a l'étiquetage et a la notice d'emploi, pour les autocuiseurs.
La présente norme est applicable aux autocuiseurs portables a usage domestique de volume brut inférieur ou égal a 25 l, dont la pression de régulation est supérieure a 4 kPa et inférieure a 150 kPa, avec systeme de chauffage indépendant ou intégré.
NOTE   Toutes les pressions indiquées dans le texte sont relatives a la pression atmosphérique.

Posoda za kuhanje – Posoda pod tlakom za domačo uporabo

General Information

Status
Published
Publication Date
30-Jun-2003
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jul-2003
Due Date
01-Jul-2003
Completion Date
01-Jul-2003

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DampfdruckkochtöpfeArticles culinaires a usage domestique - Autocuiseurs a usage domestiqueCookware - Pressure cookers for domestic use97.040.60Kuhinjska posoda, jedilni servisi in jedilni priborCookware, cutlery and flatwareICS:Ta slovenski standard je istoveten z:EN 12778:2002SIST EN 12778:2003en01-julij-2003SIST EN 12778:2003SLOVENSKI
STANDARD



SIST EN 12778:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12778November 2002ICS 97.040.20; 97.040.60English versionCookware - Pressure cookers for domestic useArticles culinaires à usage domestique - Autocuiseurs àusage domestiqueDampfkochtöpfeThis European Standard was approved by CEN on 10 October 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12778:2002 ESIST EN 12778:2003



EN 12778:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Requirements.64.1General.64.2Material.64.3Manufacturing characteristics.64.4Lifting grips.74.5Control and safety devices.74.5.1General.74.5.2Pressure control device.84.5.3Pressure indicator.84.5.4Safety device.94.5.5Decompression device.94.5.6Safety at the opening.94.5.7Mechanical resistance of safe opening systems.104.6Closing of the pressure cooker.104.7Resistance to pressure.104.7.1Resistance to deformation of the body and the lid.104.7.2Resistance to destruction of the body and the lid.114.8Pressure cookers with integral heating device.115Tests.115.1General.115.2Tests and measurements relating to materials and coatings.115.3Tests and measurements relating to manufacturing characteristics.115.3.1Maintenance and surface finish.115.3.2Deviation of the bottom.125.3.3Design of the closing ring.135.3.4Cleaning of the pressure control devices and decompression devices.135.3.5Measurement of capacity.145.4Tests and measurements relating to lifting grips.145.4.1Physical and mechanical tests.145.4.2Temperatures measurement.145.5Tests on control and safety devices.165.5.1General.165.5.2Verification of pressure control device.165.5.3Verification of pressure indicator.175.5.4Verifications of safety device.175.5.5Verification of decompression device.195.5.6Opening tests.195.5.7Mechanical resistance test of safe opening systems.215.6Tests relating to opening and closing devices.215.7Tests relating to resistance to pressure.215.7.1Test of resistance to deformation of the body and the lid.215.7.2Test of resistance to destruction of the body and the lid.216Marking, labelling and handbook.22Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives.25Bibliography.26SIST EN 12778:2003



EN 12778:2002 (E)3ForewordThis document EN 12778:2002 has been prepared by Technical Committee CEN /TC 194 "Utensils in contact withfood", the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by May 2003, and conflicting national standards shall be withdrawn at the latest byMay 2003.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.This document includes a Bibliography.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 12778:2003



EN 12778:2002 (E)41 ScopeThis European Standard defines terms, establishes manufacturing, safety and functional requirements andcorresponding tests and specifies data for marking, labelling and instructions for use, for pressure cookers.This standard is applicable to portable pressure cookers for domestic use, with gross volume up to 25 I, withworking pressure over 4 kPa and less than 150 kPa, with either integrated or independent heating.NOTEAll pressures mentioned in this text are related to atmospheric pressure.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 30-1-1, Domestic cooking appliances burning gas fuel - Part 1-1: Safety - General.EN 60335-1, Safety of household and similar electrical appliances - Part 1: General requirements (IEC 60335-1:1991, modified).EN 60335-2-15, Safety of household and similar electrical appliances - Part 2: Particular requirements forappliances for heating liquids (IEC 60335-2-15:1995).EN 12983-1:2000, Cookware - Domestic cookware for use on top of a stove, cooker or hob — Part 1: Generalrequirements.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1pressure cookercookware equipped with a removable lid being able to be fitted, specifically for the purpose of allowing cooking offoodstuffs by water and/or steam under pressure. It can be used on a stovetop or can be equipped with anintegrated heating source3.2capacityvolume of water held when the pressure cooker, without the lid, is filled to the brim while standing on a level surface3.3gross volumeinternal volume of the pressure cooker limited by the body and the lid3.4usable capacitytwo thirds of the capacity3.5independent heatingheat source not constituting an integral part of the pressure cooker3.6integrated heatingheat source which constitutes an integral part of the pressure cookerSIST EN 12778:2003



EN 12778:2002 (E)53.7working pressureactual pressure(s) at which cooking takes place3.8control pressurepressure(s) declared by the manufacturer or supplier, at which the pressure control device works3.9maximum allowable pressure PSmaximum pressure for which the pressure cooker is designed, specified by the manufacturer3.10pressure control devicedevice which stabilises the pressure inside the pressure cooker during use3.11safety devicedevice which prevents the pressure cooker from exceeding the safety pressure3.12pressure indicatorvisual and/or acoustic device indicating that there is a pressure inside the cookerNOTEIt can be one of the four types specified in 4.5.3.3.13safe opening systemsystem manual or automatic intended to prevent the pressure cooker from opening when it is under pressureNOTEThese systems can be used independently or coupled with the decompression system.3.13.1manual systemsystem actuated manually or automatically during or after the closing operation, intended to prevent the pressurecooker opening until the user unlocks the system with a manual action distinct from the opening operation, orcarries out an operation contained in the sequence of events normally carried out to open the pressure cooker3.13.2automatic systemsystem which automatically prevents the pressure cooker from being opened if the internal pressure is higher thana certain value. This system is automatically unlocked, without any user's action, when the internal pressure isequal to or below this value, and before any opening operation can be effected (see 4.5.6)3.14decompression devicedevice intended to reduce, by its own action, the internal pressure of the pressure cooker, by a substantial emissionof steam accumulated in the cooker. There are two types of decompression device: coupled and uncoupled3.14.1coupled devicedecompression device, coupled to the safe opening system of the pressure cooker. This device, as long as it is notactivated, automatically prevents the opening of the pressure cooker3.14.2uncoupled devicedecompression device independent of the safe opening system of the pressure cooker, activated by a manualaction, distinct from the opening operation3.15closed pressure cookerpressure cooker in which an internal pressure higher than 4 kPa can be reachedSIST EN 12778:2003



EN 12778:2002 (E)63.16opened pressure cookerpressure cooker in which no device prevents the separation of the lid from the body3.17opening and closing deviceall devices which affect the opening and closing of the appliance and its pressure tightness3.18progressive openingsystem of opening where depressurisation of the pressure cooker can be controlled by the user during the openingoperation4
Requirements4.1 GeneralTest and check methods relating to each of the following paragraphs are described in the correspondingparagraphs of clause 5.4.2 MaterialMaterials used for the construction of the pressure cooker:¾ shall have mechanical characteristics suitable for its manufacture and use;¾ shall have adequate chemical resistance. They shall not be damaged under the effect of water, food anddomestic cleaning products, in any way which may adversely affect the pressure cooker's operation or safety;¾ shall not be sensitive to ageing or corrosion during their expected lifetime, to any extent that may adverselyaffect the pressure cooker's operation or safety.The pressure cooker shall be made of materials of a type and purity that, under normal conditions of use, presentno toxic hazards nor in any way affect the organoleptic qualities of food prepared in it.Coatings shall comply with the requirements of EN 12983-1.NOTEAll the requirements for materials to comply with directive 97/23/CE are not addressed in this European Standard.4.3 Manufacturing characteristics4.3.1The pressure cooker and its devices and accessories shall be designed and constructed so that all theyrequire in the way of maintenance in addition to the maintenance specified by the manufacturer or supplier, issimple cleaning carried out without using special instruments.Particular care shall be taken over the finish of inside surfaces so that cleaning can be carried out thoroughly andeasily.Surfaces shall not present any defects like blisters, blowholes, or cracks which could collect dirt.No part of the pressure cooker shall have sharp edges that could injure the user.4.3.2The outside base of the pressure cooker shall not become convex.This requirement is checked:¾ at room temperature (23 °C ±
5 °C);¾ when hot before and after the ageing of the bottom in accordance with 5.3.2.2;SIST EN 12778:2003



EN 12778:2002 (E)7¾ at declared control pressures during test 5.5.2.3.The concavity of the bottom of the pressure cooker at room temperature, before and after ageing of the bottom asdescribed in 5.3.2. shall be maximum 6 ‰ of the diameter of the bottom measured at room temperature.The maximum 6 ‰ concavity requirement is not applicable to pressure cookers which are exclusively for use onexposed flame heat sources and/or exclusively for use on induction heat sources, which shall be marked asindicated in clause 6 nor to pressure cookers with an integrated heat system.The diameter of the bottom of the pressure cooker shall fulfil the requirements of 6.2.3 of EN 12983-1:2000.4.3.3Lids shall be easy to set and safe to use when the pressure cooker is used in accordance with themanufacturer's instructions. The area of the pressure cooker's external closure system, or closing ring, shall beshaped so as to prevent any jets of steam released from directly hitting the user or the handles.4.3.4Pressure control devices and decompression devices shall be easy to clean and they shall be shaped sothat any obstruction is clearly visible after the removal of demountable parts.Steam exhaust devices shall be designed and positioned so as to prevent the obstruction of the steam escapeorifices, in normal cooking use.4.3.5Capacity, measured as described in 5.3.5, shall be not less than the claimed capacity.4.4
Lifting grips4.4.1The body and the lid of the cooker shall be equipped with secure, solid and durable lifting grips.The body of the pressure cooker shall be equipped in such a manner that secure gripping and handling with twohands is possible.The lid shall have at least one lifting grip.The lifting grips, attached to the body of the pressure cooker shall be easy to use and shall be firmly attached sothat they do not come loose. They shall not affect the stability of the pressure cooker, even while it is empty. Theyshall be positioned above the centre of gravity of the pressure cooker with its lid, when filled with water to itscapacity. They shall fulfil the requirements of 7.2 to 7.6 of EN 12983-1:2000.4.4.2Lifting grips shall be designed in such a way that their temperature, when measured in accordance with5.4.2 is not higher that the following values:¾ metal55 °C;¾ plastics70 °C;¾ wood89 °C;¾ ceramic66 °C.If the values exceed these limits, it shall be indicated in the instructions for use that protections are required inorder to ensure a safe handling of the pressure cooker.Using a spherical probe 14 mm in diameter, it shall not be possible to touch any metal part contained within theinsulated portion of the lifting grips which exceeds 55 °C.4.5 Control and safety devices4.5.1 GeneralThe pressure cooker shall be equipped with the following devices:SIST EN 12778:2003



EN 12778:2002 (E)8¾ a pressure control device;¾ a pressure indicator;¾ a safety device;¾ a decompression device;¾ a safe opening system.NOTEThe decompression device can be either independent or integrated in one of the other above devices.The pressure control device shall be separate from safety device.4.5.2 Pressure control device4.5.2.1When the pressure control device has been in operation, there shall be a visual and/or acoustic signal,showing that the working pressure is reached or exceeded (type 2 indicator).4.5.2.2If necessary, the pressure control device shall be able to be easily disassembled for purposes ofcleaning, inspection or replacement.If parts can be removed while the pressure cooker is under pressure, this shall not present any hazard for the user.If an incorrect fitting of the device is possible, so that the safety function is impaired, the pressure cooker shall notbuild up a pressure higher than 4 kPa (0,04 bar).4.5.2.3The pressure control device shall be able to hold the pressure(s) corresponding to the value(s) ofcontrol pressure(s) declared by the manufacturer for this device with a tolerance of ± 20 % (with a maximum of± 20 kPa). However, minimum and maximum pressures obtainable when the device is in operation, shall never beless than 4 kPa (0,04 bar) or greater than 150 kPa (1,5 bar) respectively.4.5.2.4Weight valves shall be secured to the lid so that they cannot fall off when the pressure cooker is upsidedown.4.5.2.5In order to avoid the obstruction of the holes by food, the steam inlet of the pressure control deviceshall be designed either:¾ with one circular hole without any steam inlet tube, the diameter of which is more than or equal to 3 mm or;¾ with at least two holes with steam inlets in differently directed planes.4.5.2.6It shall not be possible for the steam released during operation of the pressure control device todirectly reach the user, in a way that could cause injury when manipulating the appliance.4.5.3 Pressure indicatorThe pressure indicator shall be visual and/or acoustic of one of the following types:1 - indicating the pressure progression from 4 kPa;2 - indicating the control pressure;3 - indicating the presence of pressure starting at a value equal to or below 4 kPa;4 - indicating the pressure progression, functionally separate from the pressure control device.The pressure control device is also a type 2 indicator (see 4.5.2.1).SIST EN 12778:2003



EN 12778:2002 (E)94.5.4 Safety device4.5.4.1 GeneralThe elastic deformation of the body or the lid of pressure cooker shall not be considered as a safely device.The safety device shall be designed so that no direct steam jet can hit the user manipulating the appliance or thelifting grips, nor extinguish the gas burner flame adjusted to its minimum.The safety device can consist of gasket deformation or extrusion, if the gasket complies with the tests according to5.5.4.3.Detachable parts of the safety device shall be designed in such a way that, if a wrong assembly of the device ispossible, the pressure cooker cannot reach a pressure higher than the maximum permissible pressure PSmeasured when the device is normally fitted.Whenever the pressure cooker is equipped with several safety devices, the requirement of non extinction of theflame only applies to the first safety device which has operated.There shall be no movement of the pressure cooker during the operation of the safety device.A self-destructing device shall be replaceable with a new one after each operation.The manufacture of the device shall ensure that it is not possible for the device to throw off fragments.All the above requirements are valid only for the safety device which operated first during test 5.5.4.4.5.4.2 Working pressure of the safety deviceThe working pressure of the safety device shall be greater than the highest measured control pressure (as per5.5.2.3) and shall not be greater than the maximum permissible pressure PS.However, a momentary pressure surge limited to 10 % of PS is acceptable, but the pressure of the safety declareddevice shall not in any case be greater than 300 kPa (3,0 bars).4.5.5 Decompression deviceThe decompression device can be coupled or uncoupled with the safe opening system of the pressure cooker.It shall reduce the internal pressure of the pressure cooker by discharging a substantial part of the steamaccumulated in the cooker while in operation, without any hazard for the user who is actuating the device4.5.6 Safety at the openingIt is compulsory that the manual release of the system precedes any other operation which will allow opening of thepressure cooker.Pressure cookers shall fulfil the specific requirements of the opening tests in Table 1 according to the type ofpressure cooker and its equipment (e.g. decompression device, type of pressure indicator).For pressure cookers with a non progressive opening, the internal pressure at the opening shall be less than orequal to 4 kPa.When the safe opening system is an automatic one, it shall prevent the pressure cooker from being opened if theinternal pressure is higher than 4 kPa.Water projection is tolerated under the conditions defined in 5.5.6.2, but the lid shall not be projected during theopening test.SIST EN 12778:2003



EN 12778:2002 (E)10If parts of the safe opening system which are detachable by the user, have been incorrectly fitted, safety onopening shall be maintained, or it shall not be possible for the pressure cooker to reach a pressure greater than4 kPa.Table 1Tests to be doneaType of pressure indicatorType of pressure cookerDecompression device1,3 and 42Type of openingwith coupled deviceA1A2Bayonetswith uncoupled deviceor without deviceA2A2Non progressivewith coupled deviceC1 or D1bC2 or D2 bInside or outside segmentsor clampswith uncoupled deviceor without deviceC2 or D2 bC2 or D2 bNon progressivewith coupled deviceOutside lidClamp and screwwith uncoupled deviceor without deviceEEProgressivewith coupled deviceClamp, cam and lever orknob, with or without springrigid lidwith uncoupled deviceor without deviceB1B1Non progressivewith coupled deviceB1B2Clamp, cam and with orwithout spring flexible lidwith uncoupled deviceor without deviceB2B2Non progressivewith coupled deviceA2 + B1A2 + B2Non progressiveInside lidLong straight handle withoutclampwith uncoupled deviceor without deviceA2 + B2A2 + B2Non progressiveaLetters from A to E indicate tests described in 5.5.6.bType C when opening requires the application of a torque.Type D when opening requires the application of a force.4.5.7 Mechanical resistance of safe opening systemsSafe opening systems shall not undergo any deformation which adversely affects their function when tested asdescribed in 5.5.7.4.6 Closing of the pressure cookerWhen the pressure cooker is closed, it shall meet the requirements of 4.5.6 and 4.7, in the most unfavourableconditions (for example, with the lid incorrectly fitted).4.7 Resistance to pressure4.7.1 Resistance to deformation of the body and the lidThe body and the lid of the pressure cooker shall not undergo any permanent deformation which may impair theiroperation and safety under the test conditions defined in 5.7.1.After testing, the pressure cooker shall comply with the requirements of 4.5.SIST EN 12778:2003



EN 12778:2002 (E)11A flattening out of the bottom surface is permitted in accordance with the provisions of 4.3.2.4.7.2 Resistance to destruction of the body and the lidWhen applying the pressure under the conditions specified in 5.7.2 and up to the specified pressure limit, thepressure cooker may undergo deformation but shall not show any incipient fracture nor any crack.All connection points between the body and the lid shall be maintained.If there is leakage, it shall occur without fracture.The separation of an added base which may be present to promote heat conduction and distribution is acceptable.4.8 Pressure cookers with integral heating devicePressure cookers with integral heating devices shall conform to the electrical or gas safety requirements of thefollowings standards:¾ EN 60335-1 and EN 60335-2-15 for integrated electrical heating equipment;¾ EN 30-1-1 for integrated gas heating equipment.5 Tests5.1 GeneralThe following tests shall be carried out on three pressure cookers of the same type and model, in the indicatedorder:1 - pressure control device (5.5.2);2 - safety device (5.5.4);3 - safety at the opening (5.5.6);4 - decompression device (5.5.5);5 - safe opening system (5.5.7);6 - resistance to deformation (5.7.1);7 - resistance to destruction (5.7.2).Carry out on the same pressure cooker, ageing of the bottom, ageing of the gasket and temperaturemeasurements of the lifting grips.5.2 Tests and measurements relating to materials and coatingsCheck materials and coating as specified in clauses 4 and 8 of EN 12983-1:2000.5.3 Tests and measurements relating to manufacturing characteristics5.3.1 Maintenance and surface finishCarry out a visual examination.SIST EN 12778:2003



EN 12778:2002 (E)125.3.2 Deviation of the bottom5.3.2.1 GeneralMeasure the concavity of the base of the body, as described in 5.3.2.3 at room temperature; before and after the25 cycles described in 5.3.2.2.Check that there is no convexity:¾ when hot, before and after the 25 cycles described in 5.3.2.2, the body containing 30 mm of a suitable oil (e.g.silicone oil) at temperature of (220 + 5) °C;¾ at declared control pressures, during test 5.5.2.3.5.3.2.2 Ageing of the bottomCentre the empty and dry body of the pressure cooker, without the li
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