EN 16728:2016+A1:2018

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 LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection23.020.35Plinske jeklenkeGas cylindersICS:Ta slovenski standard je istoveten z:EN 16728:2016+A1:2018SIST EN 16728:2016+A1:2018en,fr,de01-november-2018SIST EN 16728:2016+A1:2018SLOVENSKI
STANDARDSIST EN 16728:20161DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16728:2016+A1
June
t r s z ICS
t uä r t rä u w Supersedes EN
s x y t zã t r s xEnglish 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 x and includes Amendment
s approved by CEN on
s { April
t r s zä 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
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t r s z 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 ªA sã t r s z ESIST EN 16728:2016+A1:2018

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 . 9 4.3 Over-moulded cylinders . 9 4.4 Composite cylinders . 9 4.5 Rejected cylinders . 9 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. 13 5.3.3 Pneumatic proof test and leak test . 14 5.4 Check of the internal condition of the cylinder . 15 5.4.1 Welded aluminium and steel cylinders of alternative design and construction . 15 5.4.2 Check of the internal condition of composite cylinders . 15 5.5 Inspection of cylinder threads . 16 5.5.1 General . 16 5.5.2 Internal threads . 16 5.5.3 External threads . 16 5.5.4 Damaged threads . 16 5.6 Inspection of valves . 16 6 Final operations . 17 6.1 General . 17 6.2 Valving . 17 6.3 Tare mass . 17 6.4 Marking . 17 6.5 Purging . 17 7 Repair of cylinders . 17 8 Records . 18 Annex A (normative)
Specific requirements for external visual inspection for welded steel LPG cylinders in accordance with EN 14140 or equivalent standard . 19 A.1 General . 19 A.2 Procedure for establishing rejection criteria carbon steel cylinders . 19 A.3 Rejection criteria for stainless steel cylinders . 22 SIST EN 16728:2016+A1:2018

Specific requirements for external visual inspection of welded aluminium LPG cylinders . 24 Annex C (normative)
Specific requirements for visual inspection of composite LPG cylinders . 27 C.1 Establishment of rejection criteria . 27 C.1.1 General . 27 C.1.2 Procedure . 27 C.2 Examples of rejection criteria . 27 C.2.1 Cylinders without a metallic liner . 27 C.2.2 Cylinders with a metallic liner . 32 Annex D (informative)
Conditions for 15-year periodic inspection interval of welded steel cylinders manufactured before 1st January 2015 . 36 D.1 General . 36 D.2 Concept of control. 36 D.3 Conditions . 36 Annex E (informative)
Guidance on conditions for 10-year periodic inspection interval of composite cylinders . 38 Annex F (normative)
Specific Periodic inspection procedure for over-moulded cylinders (OMC) . 39 F.1 General . 39 F.1.1 Introduction. 39 F.1.2 Valve . 39 F.1.3 Marking and records . 39 F.2 Periodic inspection . 39 F.2.1 General . 39 F.2.2 External visual inspection . 40 F.2.3 Burst test . 41 F.2.4 Rejection criteria and annual production sampling . 42 F.2.5 Periodic inspection tests reports and records . 43 F.3 Lifetime . 44 Annex G (informative)
Example of an Over-Moulded Cylinder . 45 Bibliography . 47
3.5 minor repair operations that include cleaning and replacement of components accessible without any dismantling of the valve (e.g. outlet seal, excess flow device)" SIST EN 16728:2016+A1:2018

3.6 over-moulded cylinder OMC pressure receptacle intended for the carriage of LPG of a water capacity not exceeding 13 l made of a coated steel inner cylinder with an over-moulded protective case made from cellular plastic, which is non removable and bonded to the outer surface of the steel cylinder wall" 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 reconditioning major repairs to cylinders, which can include hot work, welding or de-denting carried out by specialists away from potential sources of flammable air/gas mixture" !
3.10" 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. !deleted text" NOTE 3 Tests can be performed in any order as determined by the written scheme. SIST EN 16728:2016+A1:2018

e) The test pressure shall be held for the time necessary to inspect the cylinder and examine it for any leak and/or other defects, but not less than 5 s. f) If there is leakage in the pressure system, it shall be corrected and the cylinders re-tested. g) Cylinders that do not leak or show any permanent visible distortion after the pressure has been released shall be deemed to have passed this test. Cylinders showing visible defects shall be examined by a competent person." NOTE Care needs to be taken to avoid corrosion if full water immersion is used. !
h) Cylinders that fail this test shall be rejected. i) Records of rejected cylinders shall be maintained for a minimum of 10 years." 5.3.3.2.2 Leak test a) The pressure shall be reduced to not less than 6 bar. The pressure drop shall be monitored in a safe and controlled manner. b) The reduced pressure shall be held for as long as it is necessary to inspect the cylinder and check for any leaks. SIST EN 16728:2016+A1:2018

NOTE This leak tightness test can be performed at the test station or at the filling plant." 6.3 Tare mass The tare mass or indication of tare mass of the cylinder shall be re-established if any modification or re-valving has been made that affects the tare mass of the cylinder. The scale used to confirm or determine the tare mass shall be calibrated according to national regulations. The scale shall be checked at regular intervals using an appropriate and calibrated set of weights to ensure its compliance. Records of such measurements shall be maintained according to Clause 8. If the new tare indication is different from the old tare indication, steps shall be taken to ensure that the former tare is unreadable. 6.4 Marking After successful completion of the periodic inspection, each cylinder shall be legibly and durably marked in accordance with EN 14894. NOTE 1 For over-moulded cylinders, see Annex F. NOTE 2 RID/ADR regulations on marking take precedence over this clause. 6.5 Purging Air shall be removed from the cylinder, e.g. by displacement with LPG. NOTE This can be performed at the test station or at the filling station. 7 Repair of cylinders !Reconditioning" and minor repairs of cylinders shall only be carried out with the agreement of the cylinder manufacturer and according to a written scheme approved by !an inspection body". SIST EN 16728:2016+A1:2018

Specific requirements for external visual inspection for welded steel LPG cylinders in accordance with EN 14140 or equivalent standard A.1 General Where applicable, the protective casing shall be removed prior to inspection. The owner of the cylinder (or their authorized representative) shall provide a written scheme to the periodic inspection station, which contains acceptance/rejection criteria for the physical and material defects and heat damage to the cylinder. !If a written scheme is not pr
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