SIST EN 16728:2016
(Main)LPG equipment and accessories - Transportable refillable traditional LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection
LPG equipment and accessories - Transportable refillable traditional LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection
This European Standard specifies procedures for periodic inspection and testing, for transportable refillable LPG cylinders with a water capacity from 0,5 l up to and including 150 l.
This European Standard is applicable to the following:
- welded steel LPG cylinders manufactured to an alternative design and construction, see EN 14140 or equivalent standard;
- welded aluminium LPG cylinders, see EN 13110 or equivalent standard;
- composite LPG cylinders, see EN 14427 or equivalent standard;
- over-moulded cylinders designed and manufactured according to EN 1442 or EN 14140, see Annex F.
This European Standard does not apply to cylinders permanently installed in vehicles.
Flüssiggas-Geräte und Ausrüstungsteile - Ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG), ausgenommen geschweißte und hartgelötete Stahlflaschen - Wiederkehrende Inspektion
Diese Europäische Norm legt Verfahren für die wiederkehrende Inspektion von ortsbeweglichen, wiederbefüll-baren Flaschen für Flüssiggas (LPG) mit einem Fassungsraum von 0,5 l bis einschließlich 150 l fest.
Diese Europäische Norm gilt für:
- geschweißte Flaschen aus Stahl für Flüssiggas (LPG), die mit alternativer Gestaltung und Konstruktion hergestellt wurden, siehe EN 14140 oder gleichwertige Norm;
- geschweißte Flaschen aus Aluminium für Flüssiggas (LPG), siehe EN 13110 oder gleichwertige Norm;
- Flüssiggasflaschen aus Verbundwerkstoff, siehe EN 14427 oder gleichwertige Norm;
- umformte Flaschen, gestaltet und hergestellt nach EN 1442 oder EN 14140, siehe Anhang F.
Diese Europäische Norm gilt nicht für Flaschen, die dauerhaft in Fahrzeugen eingebaut sind.
Équipements pour GPL et leurs accessoires - Bouteilles transportables et rechargeables pour GPL autres que celles en acier soudé et brasé - Contrôle périodique
Cette Norme européenne spécifie des modes opératoires pour des contrôles et des essais périodiques pour des bouteilles pour GPL transportables et rechargeables d’une capacité en eau comprise entre 0,5 et 150 l.
Cette Norme s’applique aux éléments suivants :
- bouteilles pour GPL, en acier soudé, fabriquées selon une conception et fabrication différentes, voir l'EN 14140 ou une Norme équivalente ;
- bouteilles pour GPL, en aluminium soudé, voir l'EN 13110 ou une Norme équivalente ;
- bouteilles pour GPL, en matériau composite, voir l'EN 14427 ou une Norme équivalente ;
- bouteilles surmoulées conçues et fabriquées conformément à l'EN 1442 ou l'EN 14140, voir l'Annexe F.
La présente Norme européenne ne s’applique pas aux bouteilles installées en permanence dans des véhicules.
Oprema in pribor za utekočinjeni naftni plin (UNP) - Premične, ponovno polnljive plinske jeklenke za UNP, ki niso varjene in trdo spajkane - Periodična kontrola
Ta evropski standard določa postopke za periodične preglede in preskušanje premičnih, ponovno polnljivih jeklenk za utekočinjeni naftni plin (LPG) z vodno kapaciteto od 0,5 l do vključno 150 l.
Ta evropski standard se uporablja za:
– varjene jeklenke za LPG z alternativno zasnovo in konstrukcijo (glej EN 14140 ali enakovreden standard);
– varjene aluminijaste jeklenke za LPG (glej EN 13110 ali enakovredni standard);
– kompozitne jeklenke za LPG (glej EN 14427 ali enakovredni standard);
– prelite jeklenke, zasnovane in izdelane v skladu s standardom EN 1442 ali EN 14140 (glej dodatek F).
Ta evropski standard se ne uporablja za jeklenke, trajno nameščene v vozila.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssiggas-Geräte und Ausrüstungsteile - Ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG), ausgenommen geschweißte und hartgelötete Stahlflaschen - Wiederkehrende InspektionÉquipements pour GPL et leurs accessoires - Bouteilles transportables et rechargeables pour GPL autres que celles en acier soudé et brasé - Contrôle périodiqueLPG equipment and accessories - Transportable refillable traditional LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection23.020.35Plinske jeklenkeGas cylindersICS:Ta slovenski standard je istoveten z:EN 16728:2016SIST EN 16728:2016en,fr,de01-junij-2016SIST EN 16728:2016SLOVENSKI
STANDARDSIST EN 1440:2008+A1:20121DGRPHãþD
SIST EN 16728:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16728
March
t r s x ICS
t uä r t rä u r Supersedes EN
s v v rã t r r z ªA sã t r s tEnglish Version
LPG equipment and accessories æ Transportable refillable LPG cylinders other than traditional welded and brazed steel cylinders æ Periodic inspection Équipements pour GPL et leurs accessoires æ Bouteilles transportables et rechargeables pour GPL autres que celles en acier soudß et brasß æ Contrôle pßriodique
FlüssiggasæGeräte und Ausrüstungsteile æ Ortsbeweglicheá wiederbefüllbare Flaschen für hartgelötete Stahlflaschen æ Wiederkehrende Inspektion This European Standard was approved by CEN on
t January
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x y t zã t r s x ESIST EN 16728:2016
EN 16728:2016 (E) 2 Contents
Page European foreword . 4 Introduction . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 7 4 Requirements for periodic inspection . 8 4.1 General . 8 4.2 Steel and aluminium cylinders . 8 4.3 Over-moulded cylinders . 8 4.4 Composite cylinders . 8 4.5 Rejected cylinders . 9 5 Inspections and tests . 10 5.1 General . 10 5.2 External visual inspection . 10 5.2.1 Preparation for external visual inspection. 10 5.2.2 Inspection procedure . 10 5.2.3 Rejection criteria . 11 5.3 Proof pressure test . 11 5.3.1 General . 11 5.3.2 Hydraulic proof pressure test. 11 5.3.3 Pneumatic proof test and leak test . 12 5.4 Check of the internal condition of the cylinder . 13 5.4.1 Welded aluminium and steel cylinders of alternative design and construction . 13 5.4.2 Check of the internal condition of composite cylinders . 14 5.5 Inspection of cylinder threads . 14 5.5.1 General . 14 5.5.2 Internal threads . 14 5.5.3 External threads . 15 5.5.4 Damaged threads . 15 5.6 Inspection of valves . 15 6 Final operations . 15 6.1 General . 15 6.2 Valving . 15 6.3 Tare mass . 15 6.4 Marking . 15 6.5 Purging . 16 7 Repair of cylinders . 16 8 Records . 16 Annex A (normative)
Specific requirements for external visual inspection for welded steel LPG cylinders in accordance with EN 14140 or equivalent standard . 17 A.1 General . 17 A.2 Procedure for establishing rejection criteria carbon steel cylinders . 17 A.3 Rejection criteria for stainless steel cylinders . 19 SIST EN 16728:2016
EN 16728:2016 (E) 3 Annex B (normative)
Specific requirements for external visual inspection of welded aluminium LPG cylinders . 22 Annex C (normative)
Specific requirements for visual inspection of composite LPG cylinders . 25 C.1 Establishment of rejection criteria . 25 C.1.1 General . 25 C.1.2 Procedure . 25 C.2 Examples of rejection criteria . 25 C.2.1 Cylinders without a metallic liner . 25 C.2.2 Cylinders with a metallic liner . 30 Annex D (informative)
Conditions for 15-year periodic inspection interval of welded steel cylinders manufactured before 1st January 2015 . 33 D.1 General . 33 D.2 Concept of control. 33 D.3 Conditions . 33 Annex E (informative)
Guidance on conditions for 10-year periodic inspection interval of composite cylinders . 35 Annex F (normative)
Specific Periodic inspection procedure for over-moulded cylinders (OMC) . 36 F.1 General . 36 F.1.1 Introduction. 36 F.1.2 Valve . 36 F.1.3 Marking and records . 36 F.2 Periodic inspection . 36 F.2.1 General . 36 F.2.2 External visual inspection . 37 F.2.2.1 General . 37 F.2.2.2 Sampling . 37 F.2.2.2.1 General . 37 F.2.2.2.2 Peeling and corrosion test . 37 F.2.2.2.3 Adhesion tests of the polyurethane material . 38 F.2.2.3 Test frequency . 38 F.2.3 Burst test . 38 F.2.4 Rejection criteria and annual production sampling . 38 F.2.5 Periodic inspection tests reports and records . 40 F.3 Lifetime . 40 Annex G (informative)
Example of an Over-Moulded Cylinder . 42 Bibliography . 44 SIST EN 16728:2016
EN 16728:2016 (E) 4
European foreword This document (EN 16728:2016) has been prepared by Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment 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 or by endorsement, at the latest by September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document in conjunction with EN 1440:2016 supersedes EN 1440:2008+A1:2012 and deals with the periodic inspection requirements for transportable refillable LPG cylinders that are not covered by EN 1440. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard has been submitted for reference into the RID [1] and the technical annexes of the ADR [2]. NOTE These regulations take precedence over any clause of this standard. It is emphasized that RID/ADR are being revised regularly at intervals of two years which may lead to temporary non- compliances with the clauses of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16728:2016
EN 16728:2016 (E) 5 Introduction The primary objective of the periodic inspection of transportable refillable liquefied petroleum gas (LPG) cylinders is that, on the completion of the tests, the cylinders may be re-introduced into service for a further period of time. The new designs of LPG cylinders have led to the development of alternative methods of inspection. This European Standard has been prepared to reflect the current methodology for periodic inspection of LPG cylinders, and is based on extensive operating experience. This European Standard calls for the use of substances and procedures that can be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Protection of the environment is a key political issue in Europe and elsewhere, for CEN/TC 286 this is covered in CEN/TS 16765 [3], and this Technical Specification should be read in conjunction with this standard. It has been assumed in the drafting of this European Standard that the execution of its provisions is entrusted to appropriately qualified and experienced people. Where judgements are called for, it has been assumed that they are made by competent persons who have been specifically trained for the tasks. SIST EN 16728:2016
EN 16728:2016 (E) 6 1 Scope This European Standard specifies procedures for periodic inspection and testing, for transportable refillable LPG cylinders with a water capacity from 0,5 l up to and including 150 l. This European Standard is applicable to the following: — welded steel LPG cylinders manufactured to an alternative design and construction, see EN 14140 or equivalent standard; — welded aluminium LPG cylinders, see EN 13110 or equivalent standard; — composite LPG cylinders, see EN 14427 or equivalent standard; — over-moulded cylinders designed and manufactured according to EN 1442 or EN 14140, see Annex F. NOTE The requirements of RID/ADR take precedence over those of this standard in the case of cylinders complying with that regulation, including pi marked cylinders. This European Standard does not apply to cylinders permanently installed in vehicles. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 837-1:1996, Pressure gauges — Part 1: Bourdon tube pressure gauges — Dimensions, metrology, requirements and testing EN 837-3:1996, Pressure gauges — Part 3: Diaphragm and capsule pressure gauges — Dimensions, metrology, requirements and testing EN 1442, LPG equipment and accessories — Transportable refillable welded steel cylinders for LPG — Design and construction EN 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels EN 12816, LPG equipment and accessories — Transportable refillable LPG cylinders — Disposal EN 13110, LPG equipment and accessories — Transportable refillable welded aluminium cylinders for liquefied petroleum gas (LPG) — Design and construction EN 14140:2014, LPG equipment and accessories — Transportable refillable welded steel cylinders for LPG — Alternative design and construction EN 14427:2014, LPG equipment and accessories — Transportable refillable fully wrapped composite cylinders for LPG — Design and construction EN 14894, LPG equipment and accessories — Cylinder and drum marking EN 14912, LPG equipment and accessories — Inspection and maintenance of LPG cylinder valves at time of periodic inspection of cylinders SIST EN 16728:2016
EN 16728:2016 (E) 7 EN ISO 4628-3:2003, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting (ISO 4628-3:2003) EN ISO 14245, Gas cylinders — Specifications and testing of LPG cylinder valves — Self-closing (ISO 14245) EN ISO 15995, Gas cylinders — Specifications and testing of LPG cylinder valves — Manually operated (ISO 15995) ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 16269-6:2014, Statistical interpretation of data — Part 6: Determination of statistical tolerance intervals 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 competent authority authority or authorities or any other body or bodies designated as such in each State and in each specific case in accordance with domestic law 3.2 competent person person which by combination of appropriate qualification, training, experience, and resources, is able to make objective judgments on the subject 3.3 inspection body independent inspection and testing body approved by the competent authority 3.4 liquefied petroleum gas LPG low pressure gas composed of one or more light hydrocarbons which are assigned to UN 1011, UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases 3.5 over-moulded cylinder OMC coated steel or stainless steel cylinder with a non removable over-moulded protective case in polyurethane or material which provides equivalent protection. 3.6 over-moulded cylinders inspection lot production of cylinders from a single over-moulding company, using inner cylinders manufactured by one manufacturer, within one calendar year SIST EN 16728:2016
EN 16728:2016 (E) 8 3.7 periodic inspection activities carried out at defined intervals, such as examining, measuring, testing or gauging the characteristics of a pressure vessel and comparing these with specified requirements 3.8 protective casing layer of protective material which gives mechanical protection which, either cannot be removed without destroying it or is only removable with special tools or is bonded to the cylinder wall Note 1 to entry: This definition can be applied to cylinders with over-moulded layers or with separate casings. 3.9 tare mass sum of the mass of the empty cylinder, the mass of the valve including a dip tube where fitted, and the mass of all other parts that are permanently attached to the cylinder when it is being filled, e.g. fixed valve guard 4 Requirements for periodic inspection 4.1 General The interval between periodic inspections shall be dependent on the content of a written scheme. Periodic inspections/tests shall be carried out by a competent person under the control of an inspection body based on a written scheme and in accordance with the procedures specified in Table 1. NOTE 1 A written scheme describes work procedures, criteria, responsibilities and other minimum requirements. NOTE 2 With the agreement of the competent authority an alternative to the proof pressure test of cylinders is acoustic emission testing, ultrasonic examination or a combination of both. EN ISO 16148 [4] can be used as a guide for acoustic emission testing procedures. NOTE 3 Tests can be performed in any order as determined by the written scheme. 4.2 Steel and aluminium cylinders The maximum interval between periodic inspections for welded steel cylinders in conformance with EN 14140 or an equivalent standard and, welded aluminium LPG cylinders in conformance with EN 13110, or equivalent standard, shall be 10 years. However for welded LPG steel cylinders in conformance with EN 14140 manufactured before the 1st January 2015, this maximum interval can be extended to 15 years, provided the conditions of Annex D are fully met and approval from the relevant competent authority(ies) has been given. 4.3 Over-moulded cylinders For over-moulded cylinders the interval is determined in accordance with Table 1. 4.4 Composite cylinders For composite cylinders, the determination of the interval between periodic inspections shall depend on the content of a written scheme that shall be approved by a competent authority, or body designated by this authority, which issued the type approval. Annex E provides guidance on the requirements for 10-year periodic inspection interval for composite cylinders. SIST EN 16728:2016
EN 16728:2016 (E) 9 4.5 Rejected cylinders Rejected cylinders shall be segregated and be either reconditioned, re-tested or rendered unserviceable. The decision to render a cylinder unserviceable may be taken at any stage during the periodic inspection procedure. With agreement by the owner, a cylinder shall be rendered unserviceable in accordance with EN 12816 such that it cannot be re-issued into service as a pressure vessel. NOTE In some countries, render unserviceable means scrapping. Table 1 — Requirements for periodic inspection Cylinder types Maximum periodic inspection interval Procedures Welded steel cylinders in conformance with EN 14140, or equivalent standard. 10 years
— External visual inspection as described in 5.2 and Annex A; — Proof pressure test (hydraulic proof pressure test or, with the agreement of the competent authority, a pneumatic proof test and leak test) as described in 5.3; — Internal condition check as described in 5.4.1 and Annex A; — Inspection of threads as described in 5.5; — Inspection of valves as described in 5.6. Welded steel cylinders in conformance with EN 14140 or equivalent standard – manufactured before 1st January 2015. — 10 years; or — 15 years with the agreement of the competent authority and under the conditions of Annex D. Welded aluminium cylinders. 10 years — External visual inspection as described in 5.2 and Annex B; — Proof pressure tests (hydraulic proof pressure test or, with the agreement of the competent authority, a pneumatic proof test and leak test) as described in 5.3; — Internal condition check as described in 5.4.1; — Inspection of threads as described in 5.5; — Inspection of valves as described in 5.6. Composite cylinders As determined by the competent authority. Guidance for 10 year periodic inspection interval described in Annex E. — External visual inspection as described in 5.2 and Annex C; — Proof pressure test (hydraulic proof pressure test or, with the agreement of the competent authority, a pneumatic proof test and leak test) as described in 5.3; — Internal condition check as described in 5.4.2; — Inspection of threads as described in 5.5; — Inspection of valves as described in 5.6. Over-moulded cylinders Annex F provides specific additional inspection requirements with destructive tests with an interval of maximum 3 years after putting in service and thereafter every 5 years. — External visual inspection as described in F.2.2; — Burst Tests as described in F.2.3; — Internal condition check as described in 5.4; — Inspection of threads as described in 5.5 — Inspection of valves as described in 5.6. SIST EN 16728:2016
EN 16728:2016 (E) 10 5 Inspections and tests 5.1 General Relevant cylinder data shall be identified before any inspections or tests are carried out. Cylinders which cannot be safely emptied of gas shall be set aside for special handling. Cylinders with inoperative or blocked valves shall be set aside for safe valve removal. Before preparing for inspection, manufacturer's guidelines shall be taken into account to avoid any damage to the cylinders. Any chemical solutions and/or cleaning methods used shall be selected to ensure that they do not adversely affect the cylinder material. 5.2 External visual inspection 5.2.1 Preparation for external visual inspection a) If necessary, the cylinder shall be cleaned and have all loose coatings or labels, corrosion products, tar, oil or other foreign matter removed from its external surface. b) Care shall be taken to avoid damaging the cylinder. c) When cylinders are treated by a process that might remove cylinder material, the inspection body shall decide whether a thickness test is required, e.g. ultrasonic thickness check. NOTE Cleaning methods include wire brushing, shot blasting (in accordance with EN ISO 8501-1 [5] and the EN ISO 8504 [6] series), water jet cleaning, chemical cleaning or other suitable methods, that do not adversely affect any part of the cylinders. 5.2.2 Inspection procedure 5.2.2.1 Welded steel and welded aluminium LPG cylinders: Cylinders shall be inspected for: a) dents, cuts, gouges, bulges, cracks, laminations or punctures, while applying the criteria for rejection in Annex A and Annex B, as appropriate; b) corrosion while applying the criteria for rejection in A.2 and Table B.2 as appropriate, giving special attention to areas where water can be trapped; Example
at the base of
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssiggas-Geräte und Ausrüstungsteile - Ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG), ausgenommen geschweißte und hartgelötete Stahlflaschen - Wiederkehrende InspektionÉquipements pour GPL et leurs accessoires - Bouteilles transportables et rechargeables pour GPL autres que celles en acier soudé et brasé - Contrôle périodiqueLPG equipment and accessories - Transportable refillable traditional LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:FprEN 16728kSIST FprEN 16728:2015en,fr,de01-december-2015kSIST FprEN 16728:2015SLOVENSKI
STANDARD
kSIST FprEN 16728:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 16728
October
t r s w ICS
t uä r t rä u r Will supersede EN
s v v rã t r r z ªA sã t r s tEnglish Version
LPG equipment and accessories æ Transportable refillable LPG cylinders other than traditional welded and brazed steel cylinders æ Periodic inspection Équipements pour GPL et leurs accessoires æ Bouteilles transportables et rechargeables pour GPL autres que celles en acier soudß et brasß æ Contrôle pßriodique
FlüssiggasæGeräte und Ausrüstungsteile æ Ortsbeweglicheá wiederbefüllbare Flaschen für hartgelötete Stahlflaschen æ Wiederkehrende Inspektion This draft European Standard is submitted to CEN members for formal voteä It has been drawn up by the Technical Committee
If this draft becomes a European Standardá CEN members are bounwhich stipulate the conditions for giving this European Standard the status of a national standard without any alterationä
This draft European Standard was established by CEN in three ofer language made by translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä
Recipients of this draft are invited to submitá with their commentsá notification of any relevant patent rights of which they are aware and to provide supporting documentationä
Warning ã This document is not a European Standardä It is distributed for review and commentsä It is subject to change without notice and shall not be referred to as a European Standardä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä FprEN
s x y t zã t r s w EkSIST FprEN 16728:2015
FprEN 16728:2015 (E) 2 Contents
Page European foreword . 5 Introduction . 6 1 Scope . 7 2 Normative references . 7 3 Terms and definitions . 8 4 Requirements for periodic inspection . 9 4.1 General . 9 4.2 Steel and aluminium cylinders . 9 4.3 Over-moulded cylinders . 9 4.4 Composite cylinders . 9 4.5 Rejected cylinders . 10 5 Inspections and tests . 11 5.1 General . 11 5.2 External visual inspection . 11 5.2.1 Preparation for external visual inspection. 11 5.2.2 Inspection procedure . 11 5.2.3 Rejection criteria . 12 5.3 Proof pressure test . 12 5.3.1 General . 12 5.3.2 Hydraulic proof pressure test. 12 5.3.3 Pneumatic proof test and leak test . 13 5.4 Check of the internal condition of the cylinder . 14 5.4.1 Welded aluminium and steel cylinders of alternative design and construction . 14 5.4.2 Check of the internal condition of composite cylinders . 15 5.5 Inspection of cylinder threads . 15 5.5.1 General . 15 5.5.2 Internal threads . 15 5.5.3 External threads . 16 5.5.4 Damaged threads . 16 5.6 Inspection of valves . 16 6 Final operations . 16 6.1 General . 16 6.2 Valving . 16 6.3 Tare mass . 16 6.4 Marking . 16 6.5 Purging . 17 7 Repair of cylinders . 17 8 Records . 17 Annex A (normative)
Specific requirements for external visual inspection for welded steel LPG cylinders in accordance with EN 14140 or equivalent standard . 18 A.1 General . 18 A.2 Procedure for establishing rejection criteria carbon steel cylinders . 18 kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 3 A.3 Rejection criteria for stainless steel cylinders. 20 Annex B (normative)
Specific requirements for external visual inspection of welded aluminium LPG cylinders . 23 Annex C (normative)
Specific requirements for visual inspection of composite LPG cylinders . 26 C.1 Establishment of rejection criteria . 26 C.1.1 General . 26 C.1.2 Procedure . 26 C.2 Examples of rejection criteria . 26 C.2.1 Cylinders without a metallic liner . 26 C.2.2 Cylinders with a metallic liner . 31 Annex D (informative)
Conditions for 15-year periodic inspection interval of welded steel cylinders manufactured before 1st January 2015 . 35 D.1 General . 35 D.2 Concept of control. 35 D.3 Conditions . 35 Annex E (informative)
Guidance on conditions for 10-year periodic inspection interval of composite cylinders . 37 Annex F (normative)
Specific Periodic inspection procedure for over-moulded cylinders (OMC) . 38 F.1 General . 38 F.1.1 Introduction. 38 F.1.2 Valve . 38 F.1.3 Marking and records . 38 F.2 Periodic inspection . 38 F.2.1 General . 38 F.2.2 External visual inspection . 39 F.2.2.1 General . 39 F.2.2.2 Sampling . 39 F.2.2.2.1 General . 39 F.2.2.2.2 Peeling and corrosion test . 39 F.2.2.2.3 Adhesion tests of the polyurethane material . 40 F.2.2.3 Test frequency . 40 F.2.3 Burst test . 40 F.2.4 Rejection criteria and annual production sampling . 40 Table F.3 — Sampling and criteria. 41 F.2.5 Periodic inspection tests reports and records . 42 F.3 Lifetime . 42 kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 4 Annex G (informative)
Example of an Over-Moulded Cylinder . 44 Bibliography . 46
kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 5 European foreword This document (FprEN 16728:2015) has been prepared by Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment and accessories”, the secretariat of which is held by NSAI. This document is currently submitted to the Formal Vote. This document in conjunction with prEN 1440 supersedes EN 1440:2008+A1:2012 and deals with the periodic inspection requirements for transportable refillable LPG cylinders that are not covered by prEN 1440. This European Standard has been submitted for reference into the RID [1] and the technical annexes of the ADR [2]. NOTE These regulations take precedence over any clause of this standard. It is emphasized that RID/ADR are being revised regularly at intervals of two years which may lead to temporary non- compliances with the clauses of this standard. kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 6 Introduction The primary objective of the periodic inspection of transportable refillable liquefied petroleum gas (LPG) cylinders is that, on the completion of the tests, the cylinders may be re-introduced into service for a further period of time. The new designs of LPG cylinders have led to the development of alternative methods of inspection. This European Standard has been prepared to reflect the current methodology for periodic inspection of LPG cylinders, and is based on extensive operating experience. This European Standard calls for the use of substances and procedures that can be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Protection of the environment is a key political issue in Europe and elsewhere, for CEN/TC 286 this is covered in CEN/TS 16765 [3], and this Technical Specification should be read in conjunction with this standard. It has been assumed in the drafting of this European Standard that the execution of its provisions is entrusted to appropriately qualified and experienced people. Where judgements are called for, it has been assumed that they are made by competent persons who have been specifically trained for the tasks. kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 7 1 Scope This European Standard specifies procedures for periodic inspection and testing, for transportable refillable LPG cylinders with a water capacity from 0,5 l up to and including 150 l. This European Standard is applicable to the following: — welded steel LPG cylinders manufactured to an alternative design and construction, see EN 14140 or equivalent standard; — welded aluminium LPG cylinders, see EN 13110 or equivalent standard; — composite LPG cylinders, see EN 14427 or equivalent standard; — over-moulded cylinders designed and manufactured according to EN 1442 or EN 14140, see Annex F. NOTE The requirements of RID/ADR take precedence over those of this standard in the case of cylinders complying with that regulation, including pi marked cylinders. This European Standard does not apply to cylinders permanently installed in vehicles. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 837-1:1996, Pressure gauges — Part 1: Bourdon tube pressure gauges — Dimensions, metrology, requirements and testing EN 837-3:1996, Pressure gauges — Part 3: Diaphragm and capsule pressure gauges — Dimensions, metrology, requirements and testing EN 1442, LPG equipment and accessories — Transportable refillable welded steel cylinders for LPG — Design and construction EN 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels EN 12816, LPG equipment and accessories — Transportable refillable LPG cylinders — Disposal EN 13110, LPG equipment and accessories — Transportable refillable welded aluminium cylinders for liquefied petroleum gas (LPG) — Design and construction EN 14140:2014, LPG equipment and accessories — Transportable refillable welded steel cylinders for LPG — Alternative design and construction EN 14427:2014, LPG equipment and accessories — Transportable refillable fully wrapped composite cylinders for LPG — Design and construction EN 14894, LPG equipment and accessories — Cylinder and drum marking EN 14912, LPG equipment and accessories — Inspection and maintenance of LPG cylinder valves at time of periodic inspection of cylinders kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 8 EN ISO 4628-3:2003, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting (ISO 4628-3:2003) EN ISO 14245, Gas cylinders — Specifications and testing of LPG cylinder valves — Self-closing (ISO 14245) EN ISO 15995, Gas cylinders — Specifications and testing of LPG cylinder valves — Manually operated (ISO 15995) ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 16269-6:2014, Statistical interpretation of data — Part 6: Determination of statistical tolerance intervals 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 competent authority authority or authorities or any other body or bodies designated as such in each State and in each specific case in accordance with domestic law 3.2 competent person person which by combination of appropriate qualification, training, experience, and resources, is able to make objective judgments on the subject 3.3 inspection body independent inspection and testing body approved by the competent authority 3.4 liquefied petroleum gas LPG low pressure gas composed of one or more light hydrocarbons which are assigned to UN 1011, UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases 3.5 over-moulded cylinder OMC coated steel or stainless steel cylinder with a non removable over-moulded protective case in polyurethane or material which provides equivalent protection. Note 1 to entry: See also ADR definition. 3.6 over-moulded cylinders inspection lot production of cylinders from a single over-moulding company, using inner cylinders manufactured by one manufacturer, within one calendar year kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 9 3.7 periodic inspection activities carried out at defined intervals, such as examining, measuring, testing or gauging the characteristics of a pressure vessel and comparing these with specified requirements 3.8 protective casing layer of protective material which gives mechanical protection which, either cannot be removed without destroying it or is only removable with special tools or is bonded to the cylinder wall Note 1 to entry: This definition can be applied to cylinders with over-moulded layers or with separate casings. 3.9 tare mass sum of the mass of the empty cylinder, the mass of the valve including a dip tube where fitted, and the mass of all other parts that are permanently attached to the cylinder when it is being filled, e.g. fixed valve guard 4 Requirements for periodic inspection 4.1 General The interval between periodic inspections shall be dependent on the content of a written scheme. Periodic inspections/tests shall be carried out by a competent person under the control of an inspection body based on a written scheme and in accordance with the procedures specified in Table 1. NOTE 1 A written scheme describes work procedures, criteria, responsibilities and other minimum requirements. NOTE 2 With the agreement of the competent authority an alternative to the proof pressure test of cylinders is acoustic emission testing, ultrasonic examination or a combination of both. EN ISO 16148 [4] can be used as a guide for acoustic emission testing procedures. NOTE 3 Tests can be performed in any order as determined by the written scheme. 4.2 Steel and aluminium cylinders The maximum interval between periodic inspections for welded steel cylinders in conformance with EN 14140 or an equivalent standard and, welded aluminium LPG cylinders in conformance with EN 13110, or equivalent standard, shall be 10 years. However for welded LPG steel cylinders in conformance with EN 14140 manufactured before the 1st January 2015, this maximum interval can be extended to 15 years, provided the conditions of Annex D are fully met and approval from the relevant competent authority(ies) has been given. 4.3 Over-moulded cylinders For over-moulded cylinders the interval is determined in accordance with Table 1. 4.4 Composite cylinders For composite cylinders, the determination of the interval between periodic inspections shall depend on the content of a written scheme that shall be approved by a competent authority, or body designated by this authority, which issued the type approval. Annex E provides guidance on the requirements for 10-year periodic inspection interval for composite cylinders. kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 10 4.5 Rejected cylinders Rejected cylinders shall be segregated and be either reconditioned, re-tested or rendered unserviceable. The decision to render a cylinder unserviceable may be taken at any stage during the periodic inspection procedure. With agreement by the owner, a cylinder shall be rendered unserviceable in accordance with EN 12816 such that it cannot be re-issued into service as a pressure vessel. NOTE In some countries, render unserviceable means scrapping. Table 1 — Requirements for periodic inspection Cylinder types Maximum periodic inspection interval Procedures Welded steel cylinders in conformance with EN 14140, or equivalent standard. 10 years
— External visual inspection as described in 5.2 and Annex A; — Proof pressure test (hydraulic proof pressure test or, with the agreement of the competent authority, a pneumatic proof test and leak test) as described in 5.3; — Internal condition check as described in 5.4.1 and Annex A; — Inspection of threads as described in 5.5; — Inspection of valves as described in 5.6. Welded steel cylinders in conformance with EN 14140 or equivalent standard – manufactured before 1st January 2015. — 10 years; or — 15 years with the agreement of the competent authority and under the conditions of Annex D. Welded aluminium cylinders. 10 years — External visual inspection as described in 5.2 and Annex B; — Proof pressure tests (hydraulic proof pressure test or, with the agreement of the competent authority, a pneumatic proof test and leak test) as described in 5.3; — Internal condition check as described in 5.4.2; — Inspection of threads as described in 5.5; — Inspection of valves as described in 5.6. Composite cylinders As determined by the competent authority. Guidance for 10 year periodic inspection interval described in Annex E. — External visual inspection as described in 5.2 and Annex C; — Proof pressure test (hydraulic proof pressure test or, with the agreement of the competent authority, a pneumatic proof test and leak test) as described in 5.3; — Internal condition check as described in 5.4.2; — Inspection of threads as described in 5.5; — Inspection of valves as described in 5.6. Over-moulded cylinders Annex F provides specific additional inspection requirements with destructive tests with an interval of maximum 3 years after putting in service and thereafter every 5 years. — External visual inspection as described in F.2.2; — Burst Tests as described in F.2.3; — Internal condition check as described in 5.4; — Inspection of threads as described in 5.5 — Inspection of valves as described in 5.6. kSIST FprEN 16728:2015
FprEN 16728:2015 (E) 11 5 Inspections and tests 5.1 General Relevant cylinder data shall be identified before any inspections or tests are carried out. Cylinders which cannot be safely emptied of gas shall be set aside for special handling. Cylinders with inoperative or blocked valves shall be set aside for safe valve removal. Before preparing for inspection, manufacturer's guidelines shall be taken into account to avoid any damage to the cylinders. Any chemical solutions and/or cleaning methods used shall be selected to ensure that they do not adversely affect the cylinder material. 5.2 External visual inspection 5.2.1 Preparation for external visual inspection a) If necessary, the cylinder shall be cleaned and have all loose coatings or labels, corrosion products, tar, oil or other foreign matter removed from its external surface. b) Care shall be taken to avoid damaging the cylinder. c) When cylinders are treated by a process that might remove cylinder material, the inspection body shall decide whether a thickness test is required, e.g. ultrasonic thickness check. NOTE Cleaning methods include wire brushing, shot blasting (in accordance with EN ISO 8501-1 [5] and the EN ISO 8504 [6] series), water jet cleaning, chemical cleaning or other suitable methods, that do not adversely affect any part of the cylinders. 5.2.2 Inspection procedure 5.2.2.1 Welded steel and welded aluminium LPG cylinders: Cylinders shall be inspected for: a) dents, cuts, gouges, bulges, cracks, laminations or punctures, while applying the criteria for rejection in Annex A and Annex B, as appropriate; b) corrosion while applying the criteria for rejection in A.2 and Table B.2 as appropriate, giving special attention to areas where water can be trapped; Example
at the base of the cylinder;
the junction between the cylindrical shell and the foot-ring;
the junction between the cylindrical shell and the valve guard or shroud;
the cylindrical shell and the valve guard or shroud; and
hidden corrosion e.g. under handles, applying the criteria for rejection given in Annex A and
Annex B as appropriate. c) other defects (e.g.
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