EN 12820:2002
(Main)Inspection and requalification of LPG tanks greater than 13 m³ underground
Inspection and requalification of LPG tanks greater than 13 m³ underground
This European Standard specifies requirements for:
a) routine inspection, periodic inspection and requalification of underground and mounded LPG storage tanks of sizes greater than 13 m³, and associated fittings;
b) marking tanks and/or keeping records, as appropriate, as a result of routine inspection, periodic inspection and requalification.
This European Standard excludes refrigerated storage.
Instandhaltung und wiederkehrende Prüfung von Behältern für Flüssiggas (LPG) mit einem Fassungsraum über 13 m³ in unterirdischer Aufstellung
Diese Europäische Norm legt Anforderungen fest für:
a) die Instandhaltung, regelmäßige Prüfung und wiederkehrende Prüfung von unterirdischen und erdgedeckten Behältern für Flüssiggas (LPG) mit einem Fassungsraum von über 13 m3 sowie der zugehörigen Ausrüstung;
b) die Kennzeichnung von Behältern und/oder Aufbewahrung der Beurkundungen der Resultate aus Instand-haltung, regelmäßiger Prüfung und wiederkehrender Prüfung.
Diese Norm gilt nicht für die Lagerung von tiefkalten Gasen.
Inspection et requalification de réservoirs enterrés de capacité supérieure à 13 m³ pour gaz de pétrole liquéfiés (GPL)
La présente norme européenne spécifie les prescriptions concernant les points suivants :
a) l'inspection de routine, l'inspection périodique et la requalification de réservoirs fixes enterrés et sous talus de stockage de GPL d'une capacité supérieure à 13 m³ et les équipements associés ;
b) le marquage des réservoirs et/ou les informations à conserver en tant que de besoin au terme de l'inspection de routine, de l'inspection périodique et de la requalification.
La présente norme européenne exclut les stockages réfrigérés.
Pregledi in periodični preskusi rezervoarjev za utekočinjeni naftni plin (UNP) podzemne izvedbe z notranjo prostornino nad 13 m3
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Instandhaltung und wiederkehrende Prüfung von Behältern für Flüssiggas (LPG) mit einem Fassungsraum über 13 m3 in unterirdischer AufstellungInspection et requalification de réservoirs enterrés de capacité supérieure a 13 m3 pour gaz de pétrole liquéfiés (GPL)Inspection and requalification of LPG tanks greater than 13 m3 underground23.020.10UH]HUYRDUMLStationary containers and tanksICS:Ta slovenski standard je istoveten z:EN 12820:2002SIST EN 12820:2002en01-november-2002SIST EN 12820:2002SLOVENSKI
STANDARD
SIST EN 12820:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12820May 2002ICS 23.020.30English versionInspection and requalification of LPG tanks greater than 13 m³undergroundInspection et requalification de réservoirs enterrés decapacité supérieure à 13 m³ pour gaz de pétrole liquéfiés(GPL)Instandhaltung und wiederkehrende Prüfung von Behälternfür Flüssiggas (LPG) mit einem Fassungsraum über 13 m³in unterirdischer AufstellungThis European Standard was approved by CEN on 25 October 2001.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 12820:2002 ESIST EN 12820:2002
EN 12820:2002 (E)2ContentspageForeword.4Introduction.51Scope.52Terms and definitions.53Safety.63.1Safety precautions.63.2Unsafe conditions.63.3Leaks.64Written scheme.65Tank inspection and requalification.75.1Routine inspection.75.2Periodic inspection.75.3Requalification.76Inspection of tank and tank fittings.86.1Tank.86.2Tank fittings and immediate pipework.86.3Valve cover.86.4Bonding.86.5Pressure relief valves.86.6Pressure gauge.96.7Contents gauges.96.8Shut-off valves.96.9Studs, bolts, nuts, and washers.96.10Emergency valves.96.11Gaskets.96.12Pressure switch.96.13Temperature gauge.96.14Remotely operated valves.106.15Corrosion protection system.107Site inspection.107.1Storage site.107.2Warning notices.108Competence.108.1Routine inspection.108.2Periodic inspection.108.3Requalification.109Records.119.1Tank data.119.2Reports.11Annex A (informative)
Internal visual inspection.12A.1General.12A.2Inspection techniques.12A.3Records.12A.4Additional inspection.12Annex B (informative)
Hydraulic pressure test.13Annex C (informative)
Acoustic emission testing.14SIST EN 12820:2002
EN 12820:2002 (E)3C.1General.14C.2Safety precautions.14C.3Acceptance criteria.14Annex D (informative)
Ultrasonic thickness test.16D.1General.16D.2Apparatus setting.16D.3Control measurement.16D.4Shell thickness measurements.16D.5End thickness.16D.6Interpretation.16D.7Rejection criteria.17Annex E (informative)
Monitoring cathodic protection with sacrificial anodes.18E.1General.18E.2Records.18E.3Procedure.18E.4Measurement of the galvanic current.18E.5Measurement of the potential difference of the tank to earth.18E.6Results.19Annex F (informative)
Monitoring cathodic protection by impressed current.20F.1General.20F.2Apparatus.20F.3Conditions.20F.4Isolation resistance of the coating.20F.4.1Procedure.20F.4.2Calculation.21F.5Results.21F.6Checking intervals.21Annex G (informative)
Example of a report.22Annex ZA
(informative)
A–deviations.23SIST EN 12820:2002
EN 12820:2002 (E)4ForewordThis document EN 12818:2002 has been prepared by Technical Committee CEN/TC 286 "Liquefied petroleum gasequipment and accessories", the secretariat of which is held by NSAI.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 November 2002, and conflicting national standards shall be withdrawn at the latestby November 2002.Users of this EN, prepared in the field of application of Article 118A of the EC Treaty, should be aware thatstandards have no formal legal relationship with Directives that may have been made under Article 118A of theTreaty. In addition, national legislation in the Member states may contain more stringent requirements than theminimum requirements of a Directive based on Article 118A. Information on the relationship between the nationallegislation implementing Directives based on Article 118A and this EN may be given in a national foreword of thenational standard implementing this EN.In this standard annexes A, B, C, D, E, F, G and ZA are informative.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 12820:2002
EN 12820:2002 (E)5IntroductionPeriodic inspection and requalification regimes for underground LPG tanks greater than 13 m3 have developed invarious countries in different ways, that range from defined to variable inspection periods with requalificationregimes achieved by various methods. This standard for periodic inspection and requalification is based onEuropean countries’ legislation and codes of practice and industries’ codes of practice. In addition, use of LPG indifferent applications has encouraged the industry to approach the requirements for routine periodic inspection andrequalification in different ways for each application.This European Standard calls for the use of substances and procedures that can be injurious to health if adequateprecautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligationsrelating to health and safety at any stage.It has been assumed in the drafting of this European Standard that execution of its provisions is entrusted toappropriately qualified and experienced people.1 ScopeThis European Standard specifies requirements for:a) routine inspection, periodic inspection and requalification of underground and mounded LPG storage tanks ofsizes greater than 13 m3, and associated fittings;b) marking tanks and/or keeping records, as appropriate, as a result of routine inspection, periodic inspection andrequalification.This European Standard excludes refrigerated storage.2 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.2.1periodic inspectionexternal inspection of the visible parts of a tank and its fittings2.2routine inspectionexternal inspection of the visible parts of a tank and its fittings, carried out more frequently than periodic inspections2.3requalificationinspection/test carried out at intervals, typically at the time of a periodic inspection, in order to confirm that a tank isfit for a further period of service2.4competent bodyperson or corporate body, defined by a national competent authority, that, by appropriate qualification, training,experience and resources, is able to make objective judgements related to inspection and testing of pressureequipment in LPG serviceSIST EN 12820:2002
EN 12820:2002 (E)62.5competent personperson who, by qualification, training, experience, and resources, is able to make objective judgements related toinspection and testing of pressure equipment in LPG service2.6national competent authorityorganization, recognised or appointed by a member state, which oversees safe operation of LPG pressureequipment2.7written schemedocument, prepared by a competent body, containing inspection information2.8commissioningpreparation for safe service2.9decommissioningremoving from service and safe preparation for inspection/test3 Safety3.1 Safety precautionsAppropriate safety precautions shall be taken during decommissioning, commissioning andinspection/requalification of a tank and its fittings.3.2 Unsafe conditionsAny unsafe condition observed by a competent person on the site of an LPG storage tank shall be reported to theperson responsible for safe operation of the tank/site, as appropriate, for action to be taken.3.3 LeaksAny leak discovered from the tank or its fittings shall be reported immediately to the person responsible for safeoperation of the tank. Action to make the tank or its fittings safe shall be taken by a competent person.NOTEMethods for detecting leaks include:¾ visual inspection;¾ smell;¾ listening;¾ use of gas detectors.4 Written scheme4.1Each tank and its fittings shall be included in a written scheme taking into account clauses 5 to 7.4.2If duties are shared between different parties the written scheme shall clearly identify the respective areas ofresponsibility.4.3Intervals between inspections shall be determined by consideration of the following:SIST EN 12820:2002
EN 12820:2002 (E)7¾ the design specification of the tank and its equipment;¾ the corrosion protection system on the tank;¾ the system used to ensure that the LPG quality conforms to its specifications/standards, and that it does notcontain components damaging to the material of the tank or its fittings;¾ the level of control over filling and maintenance of the tank.NOTEThe maximum period between requalifications should not normally be greater than 12 years, and if conditions arenot satisfactory the period should be reduced.4.4The written scheme shall contain the following information:¾ the maximum interval between inspections;¾ the parts to be inspected;¾ the nature of the inspection;¾ the critical parts that, if modified or repaired, shall be inspected by a competent person before they can be putback into service;¾ the requirements for relief valves (see 6.5);¾ the name of the competent body preparing the written scheme;¾ the date of the preparation of the written scheme.5 Tank inspection and requalification5.1 Routine inspection5.1.1Each tank and its fittings shall be routinely inspected at intervals defined in the written scheme.5.1.2An inspection or exception report shall be produced if repairs are required.5.1.3Routine inspections shall include visual inspections at the time of filling the tank.5.1.4Routine inspections shall include 6.1, 6.2, 6.3, 6.4, 6.5.2, 6.5.3, 6.7, 6.14, and clause 7.5.2 Periodic inspection5.2.1Each tank and its fittings shall be periodically inspected at intervals defined in the written scheme.5.2.2Periodic inspections shall include 5.1.4, 6.5.4, 6.6, 6.8, 6.12, and 6.13.5.3 Requalification5.3.1Requalification intervals shall be specified in the written scheme. Each tank shall be requalified, with atleast one test from group 1 and one from group 2 of Table 1.SIST EN 12820:2002
EN 1282
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