prEN 16728
(Main)LPG equipment and accessories - Transportable refillable LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection
LPG equipment and accessories - Transportable refillable LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection
This document 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 document 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 LPG cylinders designed and manufactured according to EN 1442 or EN 14140;
see Annex F.
This document can also be applied to stainless steel LPG cylinders designed according to national codes, see Annex A.3. This document can also be applied to composite LPG cylinders designed according to EN 12245.
This document 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
Dieses Dokument legt Verfahren für die wiederkehrende Inspektion und Prüfung von ortsbeweglichen, wiederbefüllbaren Flaschen für Flüssiggas (LPG) mit einem Fassungsraum von 0,5 l bis einschließlich 150 l fest.
Dieses Dokument 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 Flüssiggasflaschen, gestaltet und hergestellt nach EN 1442 oder EN 14140;
siehe Anhang F.
Dieses Dokument kann auch für Flüssiggasflaschen aus nichtrostendem Stahl angewendet werden, die nach nationalen Vorschriften ausgelegt sind, siehe Abschnitt A.3. Dieses Dokument kann auch für Flüssiggasflaschen aus Verbundwerkstoff angewendet werden, die nach EN 12245 ausgelegt sind.
Dieses Dokument 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
No Scope available
Oprema in pribor za utekočinjeni naftni plin (UNP) - Premične, ponovno polnljive jeklenke za UNP iz jekla, ki niso varjene in trdo spajkane - Periodična kontrola
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Oprema in pribor za utekočinjeni naftni plin (UNP) - Premične, ponovno polnljive
jeklenke za UNP iz jekla, ki niso varjene in trdo spajkane - Periodična kontrola
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: prEN 16728
ICS:
23.020.35 Plinske jeklenke Gas cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2025
ICS 23.020.35 Will supersede EN 16728:2016+A2:2020
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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 286.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16728:2025 E
worldwide for CEN national Members.
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 Over-moulded cylinders . 9
4.3 Composite cylinders . 9
4.4 Rejected cylinders . 9
5 Inspection 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 . 11
5.2.3 Rejection criteria . 11
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 . 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 . 14
5.5 Inspection of cylinder threads . 15
5.5.1 General. 15
5.5.2 Internal threads . 15
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 . 16
6.4 Marking . 16
6.5 Purging . 16
6.6 Coating . 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 . 18
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
Annex D (informative) Condition for 15-year periodic inspection interval of welded steel
cylinders . 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
Annex G (informative) Example of an Over-Moulded Cylinder . 47
Bibliography . 49
European foreword
This document (prEN 16728:2025) 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 supersedes EN 16728:2016+A2:2020/AC:2024 and deals with the periodic inspection
requirements for transportable refillable LPG cylinders that are not covered by EN 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.
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 can 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 document has been prepared to reflect the current methodology for periodic inspection of LPG
cylinders, and is based on extensive operating experience.
This document 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 document should be read in conjunction with that.
It has been assumed in the drafting of this document 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.
1 Scope
This document 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 document 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 LPG cylinders designed and manufactured according to EN 1442 or EN 14140;
see Annex F.
This document can also be applied to stainless steel LPG cylinders designed according to national codes,
see Annex A.3. This document can also be applied to composite LPG cylinders designed according to
EN 12245.
This document does not apply to cylinders permanently installed in vehicles.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. 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 8
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.