LPG equipment and accessories - Transportable refillable 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.
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.

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 und Prüfung 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 eine gleichwertige Norm;
-   geschweißte Flaschen aus Aluminium für Flüssiggas (LPG), siehe EN 13110 oder eine gleichwertige Norm;
-   Flüssiggasflaschen aus Verbundwerkstoff, siehe EN 14427 oder eine gleichwertige Norm;
-   umformte Flaschen, gestaltet und hergestellt nach EN 1442 oder EN 14140, siehe Anhang F.
ANMERKUNG   Für Flaschen, die den Vorschriften der/des RID/ADR entsprechen sowie für Flaschen mit der Kennzeichnung "pi", haben die in der/dem RID/ADR angegebenen Anforderungen Vorrang gegenüber den Anforderungen in der vorliegenden Norm.
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

La présente Norme européenne spécifie des modes opératoires pour le contrôle et les essais périodiques des bouteilles transportables et rechargeables pour GPL d'une capacité en eau comprise entre 0,5 l et 150 l.
La présente Norme européenne s'applique aux éléments suivants :
-   bouteilles pour GPL en acier soudé, fabriquées selon une conception et une fabrication différentes ; voir EN 14140 ou une norme équivalente ;
-   bouteilles pour GPL en aluminium soudé ; voir EN 13110 ou une norme équivalente ;
-   bouteilles pour GPL en matériau composite ; voir EN 14427 ou une norme équivalente ;
-   bouteilles surmoulées conçues et fabriquées selon l'EN 1442 ou l'EN 14140 ; voir Annexe F.
NOTE   Les exigences des règlements RID/ADR prévalent sur les dispositions de la présente norme dans le cas de bouteilles conformes à ces règlements, y compris les bouteilles comportant un marquage pi.
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 jeklenke za UNP, ki niso varjene in trdo spajkane - Periodična kontrola (vključno z dopolnilom A2)

General Information

Status
Published
Publication Date
07-Jun-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-May-2020
Due Date
27-Jul-2020
Completion Date
08-Jun-2020

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SLOVENSKI STANDARD
SIST EN 16728:2016+A2:2020
01-julij-2020
Nadomešča:
SIST EN 16728:2016+A1:2018
Oprema in pribor za utekočinjeni naftni plin (UNP) - Premične, ponovno polnljive
jeklenke za UNP, ki niso varjene in trdo spajkane - Periodična kontrola (vključno z
dopolnilom A2)
LPG equipment and accessories - Transportable refillable LPG cylinders other than
traditional welded and brazed steel cylinders - Periodic inspection
Flüssiggas-Geräte und Ausrüstungsteile - Ortsbewegliche, wiederbefüllbare Flaschen für
Flüssiggas (LPG), ausgenommen geschweißte und hartgelötete Stahlflaschen -
Wiederkehrende Inspektion
Équipements pour GPL et leurs accessoires - Bouteilles transportables et rechargeables
pour GPL autres que celles en acier soudé et brasé - Contrôle périodique
Ta slovenski standard je istoveten z: EN 16728:2016+A2:2020
ICS:
23.020.35 Plinske jeklenke Gas cylinders
SIST EN 16728:2016+A2:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 16728:2016+A2:2020

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SIST EN 16728:2016+A2:2020


EN 16728:2016+A2
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2020
EUROPÄISCHE NORM
ICS 23.020.35 Supersedes EN 16728:2016+A1:2018
English Version

LPG equipment and accessories - Transportable refillable
LPG cylinders other than traditional welded and brazed
steel cylinders - Periodic inspection
Équipements pour GPL et leurs accessoires - Bouteilles Flüssiggas-Geräte und Ausrüstungsteile -
transportables et rechargeables pour GPL autres que Ortsbewegliche, wiederbefüllbare Flaschen für
celles en acier soudé et brasé - Contrôle périodique Flüssiggas (LPG), ausgenommen geschweißte und
hartgelötete Stahlflaschen - Wiederkehrende
Inspektion
This European Standard was approved by CEN on 19 April 2018 and includes Amendment 2 approved by CEN on 6 March 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16728:2016+A2:2020 E
worldwide for CEN national Members.

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements for periodic inspection . 9
4.1 General . 9
4.2 Steel and aluminium cylinders . 10
4.3 Over-moulded cylinders . 10
4.4 Composite cylinders . 10
4.5 Rejected cylinders . 10
5 Inspections and tests . 12
5.1 General . 12
5.2 External visual inspection . 12
5.2.1 Preparation for external visual inspection. 12
5.2.2 Inspection procedure . 12
5.2.3 Rejection criteria . 13
5.3 Proof pressure test . 13
5.3.1 General . 13
5.3.2 Hydraulic proof pressure test. 14
5.3.3 Pneumatic proof test and leak test . 15
5.4 Check of the internal condition of the cylinder . 16
5.4.1 Welded aluminium and steel cylinders of alternative design and construction . 16
5.4.2 Check of the internal condition of composite cylinders . 16
5.5 Inspection of cylinder threads . 17
5.5.1 General . 17
5.5.2 Internal threads . 17
5.5.3 External threads . 17
5.5.4 Damaged threads . 17
5.6 Inspection of valves . 17
6 Final operations . 18
6.1 General . 18
6.2 Valving . 18
6.3 Tare mass . 18
6.4 Marking . 18
6.5 Purging . 18
7 Repair of cylinders . 18
8 Records . 19
Annex A (normative) Specific requirements for external visual inspection for welded steel
LPG cylinders in accordance with EN 14140 or equivalent standard . 20
A.1 General . 20
A.2 Procedure for establishing rejection criteria carbon steel cylinders . 20
A.3 Rejection criteria for stainless steel cylinders . 23
2

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
Annex B (normative) Specific requirements for external visual inspection of welded
aluminium LPG cylinders . 25
Annex C (normative) Specific requirements for visual inspection of composite LPG
cylinders . 28
C.1 Establishment of rejection criteria . 28
C.1.1 General . 28
C.1.2 Procedure . 28
C.2 Examples of rejection criteria . 28
C.2.1 Cylinders without a metallic liner . 28
C.2.2 Cylinders with a metallic liner . 33
Annex D (informative) Conditions for 15-year periodic inspection interval of welded steel
st
cylinders manufactured before 1 January 2015 . 37
D.1 General . 37
D.2 Concept of control. 37
D.3 Conditions . 37
Annex E (informative) Guidance on conditions for 10-year periodic inspection interval of
composite cylinders . 39
Annex F (normative) Specific Periodic inspection procedure for over-moulded cylinders
(OMC) . 40
F.1 General . 40
F.1.1 Introduction. 40
F.1.2 Valve . 40
F.1.3 Marking and records . 40
F.2 Periodic inspection . 40
F.2.1 General . 40
F.2.2 External visual inspection . 42
F.2.3 Burst test . 43
F.2.4 Supplementary tests . 43
F.2.5 F.2.5 Statistical evaluation of test results – Method and minimum requirements . 44
F.2.6 F.2.6 Measures if the acceptance criteria are not met . 46
F.2.7 F.2.7 Periodic inspection tests reports and records . 47
Annex G (informative) Example of an Over-Moulded Cylinder . 48
Bibliography . 50

3

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
European foreword
This document (EN 16728:2016+A2:2020) 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 October 2020, and conflicting national standards shall
be withdrawn at the latest by October 2020.
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 includes Amendment 1 approved by CEN on 19 April 2018.
This document includes Amendment 2 approved by CEN on 6 March 2020.
This document !supersedes EN 16728:2016" and deals with the periodic inspection requirements
for transportable refillable LPG cylinders that are not covered by EN 1440.
#This document supersedes EN 16728:2016+A1:2018.$
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
The start and finish of text introduced or altered by amendment is indicated in the text by tags #$.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
4

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
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.
5

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
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
6

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
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
minor repair
operations that include cleaning and replacement of components accessible without any dismantling of
the valve (e.g. outlet seal, excess flow device) and that do not affect the integrity of the pressure
receptacle$
7

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
!
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
#
3.11
basic population of OMC
production of cylinders from only one over-moulding manufacturer using new inner cylinders
manufactured by only one manufacturer within one calendar year, based on the same design type, the
same materials and production processes
3.12
sub-group of OMC
part of a basic population, owned by one single owner
Note 1 to entry: A basic population is split into sub-groups, one per owner. If the whole basic population is owned
by one owner, the sub-group equals the basic population.$
8

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
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.
9

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
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.
st
However for welded LPG steel cylinders in conformance with EN 14140 manufactured before the 1
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.
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.
10

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SIST EN 16728:2016+A2:2020
EN 16728:2016+A2:2020 (E)
Table 1 — Requirements for periodic inspection
Cylinder types Maximum periodic Procedures
inspection interval
— External visual inspection as described in 5.2 and
Welded steel 10 years
Annex A;
cylinders in
conformance with
— Proof pressure test (hydraulic proof pressure test
EN 14140, or
or, with the agreement of the competent
equivalent standard.
authority, a pneumatic proof test and leak test) as
— 10 years; or
Welded steel described in 5.3;
cylinders in
— 15 years with the
— Internal condition check as described in 5.4.1 and
conformance with
agreement of the
Annex A;
EN 14140 or
competent
equivalent standard –
authority and
— Inspection of threads as described in 5.5;
manufactured before
under the
st
1 January 2015.
conditions of — Inspection of valves as described in 5.6.
Annex D.
— External visual inspection as described in 5.2 and
Welded aluminium 10 years
Annex B;
cylinders.
— 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.
— External visual inspection as described in 5.2 and
Composite cylinders As determined by the
Annex C;
competent authority.
Guidance for 10 year
— Proof pressure test (hydraulic proof pressure test
periodic inspection
or, with the agreement of the competent
interval described in
authority, a pneumatic proof test and leak test) as
Annex E.
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.
— External visual inspection as described in F.2.2;
Over-moulded Annex F provides
cylinders specific
...

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