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

Équipements pour GPL et leurs accessoires - Bouteilles transportables et rechargeables pour GPL autres que celles en acier soudé et brasé - Contrôle périodique

Oprema in pribor za utekočinjeni naftni plin (UNP) - Premične, ponovno polnljive jeklenke iz jekla za UNP, ki niso varjene ali trdo spajkane - Periodična kontrola - Dopolnilo A2

General Information

Status
Not Published
Public Enquiry End Date
04-May-2019
Technical Committee
Current Stage
98 - Abandoned project (Adopted Project)
Start Date
08-Oct-2020
Due Date
13-Oct-2020
Completion Date
08-Oct-2020

Relations

Overview

SIST EN 16728:2016+A1:2018/kFprA2:2019 is a comprehensive European standard developed by CEN that governs the periodic inspection and testing of transportable refillable LPG cylinders. This standard specifically applies to LPG cylinders that differ from traditional welded and brazed steel cylinders in terms of materials and construction, ensuring safety and reliability over the cylinders’ service life. The scope covers cylinders with a water capacity from 0.5 liters up to and including 150 liters.

This standard is essential for manufacturers, inspection bodies, filling plants, and transporters involved in handling LPG cylinders made from welded steel (alternative designs), aluminium, composite materials, and over-moulded designs. It ensures compliance with European regulations while aligning with relevant safety directives and testing protocols.

Key Topics

  • Scope and Applicability
    EN 16728 applies to various types of refillable LPG cylinders other than traditional welded and brazed steel cylinders, including:

    • Welded steel cylinders (alternative designs per EN 14140 or equivalent)
    • Welded aluminium cylinders (per EN 13110 or equivalent)
    • Composite cylinders (per EN 14427 or equivalent)
    • Over-moulded cylinders manufactured according to EN 1442 or EN 14140
  • Periodic Inspection Procedures
    Detailed requirements for testing the structural integrity and safety of cylinders during periodic inspections, including:

    • Pneumatic proof pressure tests (where safe and authorized)
    • Leak detection and visual examinations for leakage or permanent distortion
    • Burst tests conducted at specified intervals after initial service and at recurring periods
  • Sampling and Statistical Evaluation
    The standard defines procedures for sampling cylinders for testing based on sub-groups managed by an owner, using statistically validated methods such as ISO 2859-1 for adherence and ISO 16269-6 for tolerance intervals.
    This ensures inspection results are statistically significant and that any defective group can be effectively isolated.

  • Supplementary Tests for Over-Moulded Cylinders
    Includes peeling, corrosion, and adhesion tests of the polyurethane material, ensuring the composite layers maintain protective and mechanical properties over time.

  • Handling Non-Conformance
    Procedures for segregation, additional testing, and corrective actions if cylinders or sub-groups fail to meet safety criteria, including removing defective cylinders from service until remediated or confirmed safe.

Applications

EN 16728 is critical for multiple stakeholders in the LPG supply chain to maintain safety, compliance, and functional integrity of LPG cylinders:

  • Manufacturers
    To ensure design conformity and set periodic inspection frequencies aligned with cylinder type and material.

  • Inspection Bodies and Certifiers
    To perform required testing and evaluations, maintain records, and report to authorities on cylinder fitness for service.

  • Filling Plants and Distributors
    To identify cylinders due for inspection or those flagged as defective, ensuring only safe cylinders are filled, transported, and used.

  • Regulatory Authorities
    To enforce safety standards across the lifecycle of LPG cylinders and evaluate compliance with European transport regulations.

  • Owners and Users
    To understand inspection requirements, maintain records, and replace or segregate cylinders when necessary, minimizing risks.

Related Standards

  • EN 14140 – Alternative design and construction requirements for welded steel LPG cylinders
  • EN 13110 – Aluminium LPG cylinders requirements and standards
  • EN 14427 – Specification for composite LPG cylinders
  • EN 1442 – Requirements for over-moulded LPG cylinders
  • ISO 2859-1 – Sampling procedures for inspection by attributes
  • ISO 16269-6:2017 – Statistical interpretation of data, determination of tolerance intervals
  • RID/ADR Regulations – European transport regulations with precedence where applicable

Summary

Adherence to SIST EN 16728:2016+A1:2018/kFprA2:2019 ensures the ongoing safety and reliability of transportable refillable LPG cylinders beyond traditional steel designs. This standard supports rigorous inspection, testing, statistical sampling, and corrective measures that safeguard users, regulators, and operators against risks associated with LPG handling and transport. Its integration with other material-specific standards and transport regulations provides a harmonized legal and safety framework critical to the LPG equipment industry.

Keywords: LPG cylinder periodic inspection, transportable refillable LPG cylinders, composite LPG cylinders, welded aluminium LPG cylinders, over-moulded LPG cylinders, LPG cylinder testing, EN 16728, LPG safety standards, LPG equipment compliance, European LPG cylinder regulations.

Draft
SIST EN 16728:2016+A1:2018/oprA2:2019
English language
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Standards Content (Sample)


SLOVENSKI STANDARD
SIST EN 16728:2016+A1:2018/oprA2:2019
01-april-2019
2SUHPDLQSULERU]DXWHNRþLQMHQLQDIWQLSOLQ 813 3UHPLþQHSRQRYQRSROQOMLYH
MHNOHQNHL]MHNOD]D813NLQLVRYDUMHQHLQWUGRVSDMNDQH3HULRGLþQDNRQWUROD
'RSROQLOR$
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+A1:2018/prA2:2019
ICS:
23.020.35 Plinske jeklenke Gas cylinders
SIST EN en,fr,de
16728:2016+A1:2018/oprA2:2019
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 16728:2016+A1:2018/oprA2:2019

SIST EN 16728:2016+A1:2018/oprA2:2019

DRAFT
EUROPEAN STANDARD
EN 16728:2016+A1:2018
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA2
March 2019
ICS 23.020.35
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 amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 286.

This draft amendment A2, if approved, will modify the European Standard EN 16728:2016+A1:2018. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment 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, 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 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN
worldwide for CEN national Members. 16728:2016+A1:2018/prA2:2019:2019 E

SIST EN 16728:2016+A1:2018/oprA2:2019
EN 16728:2016+A1:2018/prA2:2019 (E)
European foreword
This document (EN 16728:2016+A1:2018/prA2:2019) 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 CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade.
SIST EN 16728:2016+A1:2018/oprA2:2019
EN 16728:2016+A1:2018/prA2:2019 (E)
1 Modification to Clause 3
Modify the following definitions as follows:
3.5
minor repair
activities 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
Add the following definitions:
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.
2 Modification to Clause 5.3.1
Modify the 3rd sentence of the 1rst paragraph as follows:
“The pneumatic proof pressure test and leak test shall only be implemented where such an operation
does not entail any danger. The pneumatic proof pressure test may require the agreement of a competent
authority.”
3 Modification to Clause 5.3.3.2.1
Modify bullet e) and g) as follows:
“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.”
“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. All other cylinders shall be set aside and examined by
a competent person.”
4 Modification to Clause F.1.1
Modify the 1st sentence as follows:
“This annex is applicable to over-moulded cylinders as defined in 3.6 and designed and manufactured in
accordance with EN 1442, EN 14140 or Annex I, parts 1 to 3 to Council Directive 84/527/EEC.
In the 3rd sentence, replace:
OMC's
with
over-moulded cylinders
SIST EN 16728:2016+A1:2018/oprA2:2019
prEN 16728:2016/prA2:2018 (E)
5 Modification to F.1.3
Modify the list as follows:
— identification and/or automatic sampling of cylinders from a sub-group, to perform tests and/or
manage the periodic inspection test date;
— recording of relevant data of periodic inspection in the database (date and place of periodic
inspection) for availability to inspection bodies, filling centres and competent authorities;
— marking which indicates the successful completion of the periodic inspection;
— that in the case of an issue with a part or the whole sub-group, affected cylinder(s) are automatically
withdrawn at filling plant, before filling.
6 Modification to F.2.1
In the 1st paragraph, add at the end of the sentence:
“and supplemented by F.2.4.”
Delete the last sentence:
“When the cylinder return to a filling plant at time of periodic inspection, the inspections described in 5.4,
5.5 and 5.6 shall be fulfilled for each OMC”.
7 Modification to F.2.2
Delete the title F.2.2.1 General
Delete the 3rd paragraph of the subclause:
“Prior to any possible reuse of the inner receptacle for over-moulding, the former over-moulding case
shall be removed and a hydraulic test shall be carried out.”
Delete the subclause F.2.2.2 Sampling and its content
Delete the subclause F.2.2.2.1 General and its content
Delete the subclause F.2.2.2.2 Peeling and corrosion test and its content
Delete the subclause F.2.2.2.3 Adhesion tests of the polyurethane material and its content
Delete the subclause F.2.2.3 Test frequency and its content
8 Modification to Clause F.2.3
Delete the content of subclause F.2.3 and replace it by the following:
“Burst tests, in accordance with EN 1442 or EN 14140, shall be performed on each related sample
according to the Table F.3 and shall be conducted after the first 3 years in service and every 5 years
thereafter”
SIST EN 16728:2016+A1:2018/oprA2:2019
EN 16728:2016+A1:2018/prA2:2019 (E)
9 Modification to Clause F.2.4
Delete the subclause F.2.4 and its content and replace it by the following:
F.2.4 Supplementary tests
F.2.4
...

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Frequently Asked Questions

SIST EN 16728:2016+A1:2018/kFprA2:2019 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "LPG equipment and accessories - Transportable refillable LPG cylinders other than traditional welded and brazed steel cylinders - Periodic inspection". This standard covers: 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.

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.

SIST EN 16728:2016+A1:2018/kFprA2:2019 is classified under the following ICS (International Classification for Standards) categories: 23.020.35 - Gas cylinders. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 16728:2016+A1:2018/kFprA2:2019 has the following relationships with other standards: It is inter standard links to SIST EN 16728:2016+A2:2020, SIST EN 16728:2016, SIST EN 16728:2016+A1:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 16728:2016+A1:2018/kFprA2:2019 is associated with the following European legislation: EU Directives/Regulations: 2008/68/EC; Standardization Mandates: M/086. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

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