EN 12818:2002
(Main)Inspection and requalification of LPG tanks up to and including 13 m³ underground
Inspection and requalification of LPG tanks up to and including 13 m³ underground
This European Standard specifies requirements for: a) routine inspection, periodic inspection and requalification of underground and mounded pressurised LPG static storage tanks of sizes from 150 l to and including 13 m3. b) marking and certification of tanks and the records to be kept as appropriate as a result of routine inspection, periodic inspection and requalification. This European Standard excludes refrigerated storage.
Prüfung und Nachprüfung von Behältern für Flüssiggas (LPG) mit einem Fassungsraum bis einschliesslich 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 150 l bis einschließlich 13 m3 sowie der zuge-hörigen 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 inférieure ou égale 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 de stockage sous pression statique enterrés et sous talus, équipements associés inclus, d'une capacité allant de 150 l à 13 m3 inclus. b) le marquage et la certification de réservoirs ainsi que les informations à conserver au terme de l'inspection de routine, de l'inspection périodique et de la requalification. La présente norme européenne ne concerne pas les stockages réfrigérés.
Pregledi in periodični preskusi rezervoarjev za utekočinjeni naftni plin (UNP) podzemne izvedbe z notranjo prostornino do vključno 13 m3
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfung und Nachprüfung von Behältern für Flüssiggas (LPG) mit einem Fassungsraum bis einschliesslich 13 m3 in unterirdischer AufstellungInspection et requalification de réservoirs enterrés de capacité inférieure ou égale a 13 m3 pour gaz de pétrole liquéfiés (GPL)Inspection and requalification of LPG tanks up to and including 13 m3 underground23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:EN 12818:2002SIST EN 12818:2002en01-november-2002SIST EN 12818:2002SLOVENSKI
STANDARD
SIST EN 12818:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12818May 2002ICS 23.020.30English versionInspection and requalification of LPG tanks up to and including13 m³ undergroundInspection et requalification de réservoirs enterrés decapacité inférieure ou égale à 13 m³ pour gaz de pétroleliquéfiés (GPL)Prüfung und Nachprüfung von Behältern für Flüssiggas(LPG) mit einem Fassungsraum bis einschliesslich 13 m³ inunterirdischer 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 12818:2002 ESIST EN 12818:2002
EN 12818:2002 (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.96.4Bonding.96.5Pressure relief valve.96.6Pressure gauge.96.7Contents gauges.96.8Shut-off valves.96.9Studs, bolts, nuts, and washers.96.10Corrosion protection system.97Site inspection.107.1Storage site.107.2Warning notices.108Competence.108.1Routine inspection.108.2Periodic inspection.108.3Requalification.109Records.109.1Tank data.109.2Reports.10Annex 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.14C.1General.14C.2Safety precautions.14C.3Acceptance criteria.14Annex D (informative)
Ultrasonic thickness test.16SIST EN 12818:2002
EN 12818:2002 (E)3D.1General.16D.2Apparatus setting.16D.3Control measurement.16D.4Shell thickness measurements.16D.5End thickness.16D.6Interpretation.16D.7Rejection criteria.17Annex E (informative)
External monitoring by camera.18E.1General.18E.2Inspection procedure.18E.3Interpretation of results.18E.4Records.18Annex F (informative)
Monitoring cathodic protection with sacrificial anodes.19F.1General.19F.2Records.19F.3Procedure.19F.4Measurement of the galvanic current.19F.5Measurement of the potential difference of the tank to earth.19F.6Results.20Annex G (informative)
Monitoring cathodic protection by impressed current.21G.1General.21G.2Apparatus.21G.3Conditions.21G.4Isolation resistance of the coating.21G.4.1Procedure.21G.4.2Calculation.22G.5Results.22G.6Checking intervals.22Annex H (informative)
Corrosion monitoring by moisture and condensation detection.23H.1General.23H.2Equipment characteristics.23H.3Monitoring.23H.4Interpretation.23Annex I (informative)
Assessment of tanks by sampling.24I.1General.24I.2Homogeneous batch.24I.3Selection of samples.24I.4Sample selection.25I.5Inspection period.25I.6Presentation of results and decisions.25I.7Pass criteria.25I.8Example calculation of a sample.25Annex J (informative)
Example of a report.27Annex ZA
(informative)
A–deviations.28SIST EN 12818:2002
EN 12818:2002 (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.In this standard the annexes A, B, C, D, E, F, G, H, I, J and ZA are informative.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.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 12818:2002
EN 12818:2002 (E)5IntroductionPeriodic inspection and requalification regimes for underground LPG tanks up to and including 13 m3 havedeveloped in various countries in different ways, that range from defined to variable inspection periods withrequalification regimes achieved by various methods. This standard for periodic inspection and requalification isbased on European countries’ legislation and codes of practice and industries’ codes of practice. In addition, use ofLPG in different applications has encouraged the industry to approach the requirements for routine periodicinspection and requalification 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 from 150 l up to and including 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 12818:2002
EN 12818:2002 (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.3.3LeaksAny 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 fitting 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 12818:2002
EN 12818:2002 (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 the filling and maintenance of the tank.NOTEThe maximum period between requalifications should not normally be greater than 20 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 6.5.1);¾ the name of the competent body preparing the written scheme;¾ the date of 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, 6.7, 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, 6.6, 6.8, and 6.10.5.3 Requalification5.3.1Requalification intervals shall be specified in the written scheme. Requalification shall conform to either a)or b).a) Individual requalification of each tankIndividual requalification shall include at least one test from group 1 and one from group 2 of Table 1.SIST EN 12818:2002
EN 12818:2002 (E)8Table 1 — Requalification testsGroup 1Group 2Internal visual inspection (see annex A)Hydraulic pressure test (see annex B)Acoustic emission test (see annex C)Ultrasonic thickness test (see annex D)Other equivalent methodExternal visual inspection (i.e. excavation)External monitoring by camera etc. (see annex E)Cathodic protection monitoring (see annex F or G)Moisture detection (see annex H)b) Requalification of a production batch by samplingTanks shall be sampled in accordance with annex I. The tanks shall pass an internal inspection (see annex A),and shall be tested as follows before any repair or refurbishment is carried out:¾ a hydraulic pressure test (see annex B); and¾ an ultrasonic thickness test (see annex D); and¾ an X-ray or ultrasonic check on welds, comparable to inspections carried out at the time of manufacture;¾ or¾ an acoustic emission test (see annex C).5.3.2At commissioning, leak checks shall be carried out at connections. Gaskets that have been removed whenbreaking connections shall not be reused.6 Inspection of tank and tank fittings6.1 TankThe visible part of the tank shall be checked for external corrosion or damage.6.2 Tank fittings and immediate pipeworkTank fittings and immediate pipework shall be checked for the following:¾ severe corrosion;¾ damage;¾ inoperative or leaking filler valves;¾ worn or damaged filler valve thread or connection;¾ damaged or lifting relief valve;¾ inoperative fixed liquid level gauge.SIST EN 12818:2002
EN 12818:2002 (E)96.3 Valve coverThere shall be a check that the valve covers are in place, undamaged and able to be locked.6.4 Bonding6.4.1The electrical bonding between the tank and earth point shall be visually checked.6.4.2There shall be a check that the road tanker bonding tag (if applicable) is undamaged.6.5 Pressure relief valve6.5.1Either:a) test the set pressure of the relief valve, and, for an external relief valve, check on the condition of the spring; orb) replace the relief valve with a new or reconditioned valve if required.WARNINGDo not remove a relief valve from a pressure relief valve manifold or check-device while a tank isunder pressure, unless a serviceable replacement is available for immediate fitting. Do not remove a relief valvemounted in a tank under pressure unless the type and construction of the check device can be identified and themanufacturer’s instructions for safe removal are complied with. A check device shall include positive means ofconfirming that the check device has closed before the relief valve is unscrewed to an otherwise dangerous stage.6.5.2The relief valve drain hole shall be checked to ensure it is clear.6.5.3There shall be a check that rain caps are present and in good condition.6.6 Pressure gaugeThe pressure gauge, if fitted, shall be checked against a test gauge or replaced.6.7 Contents gaugesGauging devices or contents gauges that bleed to the atmosphere (e.g. rotary tubes, fixed tubes or slip tubes) shallbe tested when filling the tank. Other types of contents gauges shall be checked as required (e.g. during producttransfer to or from the tank).6.8 Shut-off valvesShut-off valves shall be tested for correct function.WARNINGWhen checking the function of a valve do not shut off the gas supply unless the user has beeninformed. Do not restore a gas supply before checking that appliance valves are closed.Blanked or plugged liquid phase valves shall be checked for external leakage.6.9 Studs, bolts, nuts, and washersStuds, bolts, nuts, and washers shall be checked for damage or severe corrosion and replaced if required.6.10 Corrosion protection systemAny check required for the selected corrosion protection system, as detailed in the written scheme, shall be carriedout.SIST EN 12818:2002
EN 12818:2002 (E)107 Site inspection7.1
Storage siteThe storage site shall be checked to ensure that it is free of:¾ flammable materials within 1 m of the tank;¾ other hazards (e.g. ignition sources closer than the recommended separation distance).The means of protection from mechanical damage shall be visually inspected, if fitted.7.2 Warning noticesWarning notices shall be checked to ensure that they are in place and legible.8 Competence8.1 Routine inspectionPersons shall be deemed competent to carry out routine inspections if they have received the appropriate trainingto carry out 5.1 and to prepare an inspection report.8.2 Periodic inspectionPersons shall be deemed competent to carry out periodic inspections if:¾ they are competent to carry out routine inspections (see 8.1); and¾ they are part of an inspection team with the appropriate background, training and qualification, or have workedwith or within the LPG industry, performing the relevant task, and have a good general knowledge of LPG andits operating environment.The relevant attributes shall be documented.8.3 RequalificationPersons shall be deemed competent to requalify a tank if they possess detailed knowledge of the technique(s)used in requalification, with relevant training and certification.9 Records9.1 Tank dataIf the tank identification plate or tag is illegible, it shall be cleaned, repaired or replaced as appropriate.All information on the tank data plate or tag or documentation shall be updated, as appropriate, after periodicinspection or requalification.9.2 ReportsA system shall be in place to ensure that routine inspections are carried out in accordance with the written scheme.A report shall be produced if a tank passes a periodic inspection or requalification.SIST EN 12818:2002
EN 12818:2002 (E)11If a tank fails a periodic inspection or requalification, a report shall be prepared as part of a formal follow-up system.Decisions whether to exchange a tank or repair a fault on site shall be taken by the person responsible for safeoperation of the tank in consultation with the competent body.NOTEAn example of a report form that can be used for routine inspections or periodic inspections and requalification isgiven in annex J.SIST EN 12818:2002
EN 12818:2002 (E)12Annex A(informative)Internal visual inspectionA.1 GeneralThe aim of internal visual inspections is to detect surface defects on the tank shell, including:¾ co
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