SIST EN 14334:2023

LPG equipment and accessories - Inspection and testing of LPG road tankers

This document specifies minimum requirements for the inspection and testing of the LPG road tanker, which includes its pressure vessel, accessories and vehicle LPG equipment.
This document does not apply to compartmented road tankers.
NOTE 1   There is no upper size limit for the pressure vessel as this will be determined by the gross vehicle weight limitation.
NOTE 2   For further information on inspection and testing requirements of equipment other than the pressure vessel, accessories and vehicle LPG equipment, see applicable regulations.

Flüssiggas-Geräte und Ausrüstungsteile - Inspektion und Prüfung von Straßentankwagen für Flüssiggas (LPG)

Dieses Dokument legt Mindestanforderungen an die Inspektion und Prüfung von Straßentankwagen für Flüssiggas (LPG), einschließlich des Druckbehälters, der Ausrüstungsteile und der Flüssiggas-Fahrzeugausrüstung fest.
Dieses Dokument gilt nicht für Straßentankwagen, die in mehrere Abschnitte unterteilt sind.
ANMERKUNG 1   Es besteht keine obere Begrenzung für die Größe der Druckbehälter, da diese durch die maximale Bruttomasse des Fahrzeugs begrenzt wird.
ANMERKUNG 2   Für weitere Informationen zu den Inspektions- und Prüfanforderungen von anderer Ausrüstung als Druckbehälter, Ausrüstungsteile und Flüssiggas-Fahrzeugausrüstung siehe die jeweiligen anwendbaren Rechtsvorschriften.

Équipements pour GPL et leurs accessoires - Inspection et essais des véhicules citernes routiers pour GPL

Le présent document spécifie les exigences minimales relatives à l'inspection et aux essais des véhicules citernes routiers pour GPL qui incluent les réservoirs sous pression, leurs accessoires et les équipements pour véhicules GPL.
Le présent document ne s'applique pas aux véhicules-citernes routiers compartimentés.
NOTE 1   Il n'y a pas de limite supérieure de taille pour le réservoir sous pression dans la mesure où elle est déterminée par la limitation de masse brute du véhicule.
NOTE 2   Pour des informations supplémentaires concernant les exigences d'inspection et d'essais des équipements autres que le réservoir sous pression, ses accessoires et les équipements pour véhicules GPL, voir les réglementations en vigueur.

Oprema in pribor za utekočinjeni naftni plin (UNP) - Pregledi in preskušanje cestnih cistern za UNP

Ta dokument določa minimalne zahteve za preglede in preskušanje cestnih cistern za utekočinjeni naftni plin (LPG), kar zajema njihove tlačne posode, pribor in opremo za vozilo za LPG.
Ta dokument ne določa zahtev za začetni pregled (po izdelavi) tlačne posode, glej standard EN 12493, ali za obratovalno opremo cestne cisterne, glej standard EN 12252.
Ta dokument se ne uporablja za cestne cisterne z več predelki.
OPOMBA 1:   Zgornje omejitve velikosti tlačne posode ni, ker je ta določena z omejitvijo bruto teže vozila.
OPOMBA 2:   Za zahteve glede pregledov in preskušanja opreme, ki ni tlačna posoda, pribor in oprema za vozilo za utekočinjen naftni plin, glej veljavne predpise.

General Information

• Status: Published
• Public Enquiry End Date: 02-Apr-2022
• Publication Date: 17-Aug-2023
• ICS: 23.020.20 - Vessels and containers mounted on vehicles
• ICS: 43.080.10 - Trucks and trailers
• Technical Committee: TLP - Pressure vessels
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Jul-2023
• Due Date: 22-Sep-2023
• Completion Date: 18-Aug-2023
• Directive: 2008/68/EC - Directve 2008/68/EC of the European Parliament and of the council of 24 September 2008 on the inland transport of the dangerous goods
• Mandate: M/TDG - Standards for referencing in the RID-ADR
• Mandate: M/XXX - COMMISSION IMPLEMENTING DECISION of XXX on a standardisation request to the European Committee for Standardization, to the European Committee for Electrotechnical Standardization and to the European Telecommunications Standards Institute as regards certain measuring instruments in support of Directive 2014/32/EU of the European Parliament and of the Council
• Ref Project: EN 14334:2023 - LPG equipment and accessories - Inspection and testing of LPG road tankers

Relations

• Replaces: SIST EN 14334:2015 - LPG equipment and accessories - Inspection and testing of LPG road tankers
• Effective Date: 01-Sep-2023

Overview

EN 14334:2023 is the CEN European standard that sets minimum requirements for the inspection and testing of LPG road tankers, covering the pressure vessel, its accessories and vehicle LPG equipment. The standard applies to non-compartmented road tankers (no upper size limit for the pressure vessel except by gross vehicle weight) and defines procedures for initial and in‑service inspection, testing, certification and marking.

Key topics and technical requirements

• Scope and definitions: Clarifies terms (referencing CEN/TS 16769) and the limit of application to non-compartmented LPG road tankers.
• Initial inspection and testing (Clause 4): Pre‑service checks for conformity, design verification, internal/external examinations, hydraulic pressure test and leakproofness test, plus functional checks of equipment.
• In‑service inspection and testing (Clause 5 & 6): Periodic inspections of pressure vessels made to EN 12493 or EN 14025, with documented frequencies and re‑inspection rules.
• Pressure vessel inspection:
  • Interior and exterior visual examinations (6.3, 6.4)
  • Earthing/grounding checks and structural inspection procedures
  • Acceptance and rejection criteria for observed defects
• Testing methods:
  • Hydraulic pressure testing (6.6) and leakproofness testing (6.7) requirements and evaluation
  • Non‑destructive testing (NDT) options: radiographic, ultrasonic, magnetic particle, penetrant, eddy‑current and acoustic emission testing (newly referenced)
  • Measurement uncertainty considerations and calibrated instrumentation
• Vehicle LPG equipment and accessories (6.5, 6.8):
  • Examination and testing of PRVs (pressure relief valves), Emergency Shut‑Down (ESD) systems, hose assemblies, couplings, sun shields, metering systems and hose transfer connections
  • Recommendations for gas detectors and testing after repairs
• Certification and marking (Clause 7): Inspection certificates, periodic/intermediate inspection records and marking requirements for road tankers.

Practical applications

• Ensures safe operation and legal compliance for transport of LPG in road tankers.
• Guides workshops and NDT providers performing initial, periodic and post‑repair inspections.
• Supports fleet operators, LPG distributors and transport safety managers in maintenance planning and regulatory compliance.
• Used by competent authorities and inspection bodies to verify conformity with European transport safety obligations (RID/ADR take precedence where applicable).

Who should use this standard

• Inspection bodies and NDT technicians
• Road tanker manufacturers and OEMs
• Fleet maintenance teams and LPG transport operators
• Regulators, certification bodies and safety auditors

Related standards (selection)

• EN 12493 (welded steel pressure vessels for LPG road tankers)
• EN 12252 (equipping of LPG road tankers)
• CEN/TS 16769 (terminology)
• EN 14129 (pressure relief valves)
• Relevant NDT standards: EN ISO 3452‑1, EN ISO 17640, EN ISO 17636‑2, EN ISO 17638

Keywords: EN 14334:2023, LPG road tankers, inspection and testing, pressure vessel inspection, leakproofness test, hydraulic pressure test, non‑destructive testing, PRV, ESD, inspection certificate.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2023
Nadomešča:
SIST EN 14334:2015
Oprema in pribor za utekočinjeni naftni plin (UNP) - Pregledi in preskušanje
cestnih cistern za UNP
LPG equipment and accessories - Inspection and testing of LPG road tankers
Flüssiggas-Geräte und Ausrüstungsteile - Inspektion und Prüfung von
Straßentankwagen für Flüssiggas (LPG)
Équipements pour GPL et leurs accessoires - Inspection et essais des véhicules citernes
routiers pour GPL
Ta slovenski standard je istoveten z: EN 14334:2023
ICS:
23.020.20 Posode in vsebniki, montirani Vessels and containers
na vozila mounted on vehicles
43.080.10 Tovornjaki in priklopniki Trucks and trailers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14334
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 43.080.10 Supersedes EN 14334:2014
English Version
LPG equipment and accessories - Inspection and testing of
LPG road tankers
Équipements pour GPL et leurs accessoires - Inspection Flüssiggas-Geräte und Ausrüstungsteile - Inspektion
et essais des véhicules citernes routiers pour GPL und Prüfung von Straßentankwagen für Flüssiggas
(LPG)
This European Standard was approved by CEN on 28 May 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14334:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Initial inspection and testing . 8
5 In-service inspection and testing . 9
6 Inspection and testing requirements . 11
6.1 General. 11
6.2 Inspection of the necessary documents . 11
6.3 Inspection of the interior of the pressure vessel. 11
6.4 Inspection of the exterior of the pressure vessel . 11
6.4.1 External visual inspection . 11
6.4.2 Inspection of earthing . 12
6.4.3 Pressure vessel inspection procedures . 12
6.4.4 Inspection criteria . 12
6.5 Inspection of the vehicle LPG equipment and accessories . 12
6.5.1 Inspection . 12
6.5.2 Satisfactory operation . 13
6.5.3 Hose end couplings and transfer couplings . 13
6.5.4 Emergency Shut-Down system (ESD) . 13
6.5.5 Sun shields . 13
6.5.6 Metering systems . 13
6.6 Hydraulic pressure testing . 14
6.6.1 General. 14
6.6.2 Hydraulic test pressure . 14
6.6.3 Hydraulic pressure test liquid . 14
6.6.4 Pressurization . 14
6.6.5 Test duration . 14
6.6.6 Measurement . 14
6.6.7 Evaluation of the test . 15
6.6.8 Alternatives to the periodic hydraulic test . 15
6.7 Leakproofness test . 16
6.7.1 General. 16
6.7.2 Leakproofness test pressure . 16
6.7.3 Extent of test . 17
6.7.4 Evaluation of the test . 17
6.8 Testing of the vehicle LPG equipment and accessories. 17
6.8.1 Testing of PRVs . 17
6.8.2 Testing of the Emergency Shut-Down system (ESD) . 17
6.8.3 Testing of hose assemblies . 17
6.9 Inspection and testing of pressure vessel or structural equipment after repair . 17
6.10 Re-inspection . 18
7 Inspection certificate and marking . 18
7.1 Certification of periodic, intermediate inspection and exceptional check . 18
7.2 Marking . 18
Annex A (informative) Road tanker inspection/check certificate . 19
Bibliography . 20

European foreword
This document (EN 14334:2023) 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 January 2024, and conflicting national standards shall
be withdrawn at the latest by January 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14334:2014.
In comparison with the previous edition, the following technical modifications have been made:
— Removal of the Annex on the Environmental checklist, addition of a reference to CEN/TS 16765;
— where possible, the terms in Clause 3 were substituted with a reference to CEN/TS 16769;
— the definitions for test and inspection from EN ISO 10286 “Gas cylinders — Terminology” were
adopted and included to Clause 3;
— the clause on initial inspection and testing was taken from EN 12252 and the document is re-
structured; with the new Clause 4 “Initial inspection and testing” and Clause 5 “In-service inspection
and testing”;
— Table 1 on the frequency of required inspections and tests was updated;
 a footnote regarding road tankers was added to Table 1;
— introduction of new Clause 6.5 “Inspection of the vehicle LPG equipment and accessories”;
 a note and a test regarding PRVs was added to 6.5.1
— 6.7.2 “Leakproofness test pressure” was updated;
— 6.8 “Testing of the vehicle LPG equipment and accessories” was thoroughly revised;
— the term “inspectors” was substituted with “inspection body”, where appropriate;
— requirements on the inspection of necessary documents were simplified;
— a recommendation for the use of gas detectors was added;
— the test of earthing connections was clarified;
— acoustic emission testing was added as possible method.
This document will be submitted for reference in
— the RID and/or
— the technical annexes of the ADR [5].
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 can lead to temporary non-compliances with the clauses of
this standard.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
Introduction
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.
The frequencies of the different types of pressure vessel inspection are given by the relevant international
regulations concerning the transport of dangerous goods.
Protection of the environment is a key political issue in Europe and elsewhere, for CEN/TC 286 this is
covered in CEN/TS 16765 [1] and this Technical Specification should be read in conjunction with this
document. This Technical Specification provides guidance on the environmental aspects to be considered
regarding equipment and accessories produced for the LPG industry and the following is addressed:
a) design;
b) manufacture;
c) packaging;
d) use and operation; and
e) disposal.
It is recommended that companies using this document develop an environmental management policy.
For guidance, see EN ISO 14001 [3].
It has been assumed in the drafting of this document that the execution of its provisions is entrusted to
appropriately qualified and experienced people.
All pressures are gauge pressures unless otherwise stated.
NOTE This document requires measurement of material properties, dimensions and pressures. All such
measurements are subject to a degree of uncertainty due to tolerances in measuring equipment etc. It might be
beneficial to refer to the leaflet “measurement uncertainty leaflet” SP INFO 2000 27 [4].
1 Scope
This document specifies minimum requirements for the inspection and testing of the LPG road tanker,
which includes its pressure vessel, accessories and vehicle LPG equipment.
This document does not apply to compartmented road tankers.
NOTE 1 There is no upper size limit for the pressure vessel as this will be determined by the gross vehicle weight
limitation.
NOTE 2 For further information on inspection and testing requirements of equipment other than the pressure
vessel, accessories and vehicle LPG equipment, see applicable regulations.
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.
CEN/TS 16769, LPG equipment and accessories - Terminology
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 1762, Rubber hoses and hose assemblies for liquefied petroleum gas, LPG (liquid or gaseous phase), and
natural gas up to 25 bar (2,5 MPa) - Specification
EN 12252:2022, LPG equipment and accessories - Equipping of LPG road tankers
EN 12493, LPG equipment and accessories - Welded steel pressure vessels for LPG road tankers - Design and
manufacture
EN 13109, LPG equipment and accessories - LPG tanks and drums - Disposal
EN 13554, Non-destructive testing - Acoustic emission testing - General principles
EN 14025, Tanks for the transport of dangerous goods - Metallic pressure tanks - Design and construction
EN 14129, LPG Equipment and accessories - Pressure relief valves for LPG pressure vessels
EN ISO 3452-1, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-1:2021)
EN ISO 5579, Non-destructive testing - Radiographic testing of metallic materials using film and X- or
gamma rays - Basic rules (ISO 5579:2013)
EN ISO 9712, Non-destructive testing - Qualification and certification of NDT personnel (ISO 9712:2021)
EN ISO 17636-2, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray
techniques with digital detectors (ISO 17636-2)
EN ISO 17638, Non-destructive testing of welds - Magnetic particle testing (ISO 17638)
EN ISO 17640, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and
assessment (ISO 17640)
EN ISO 17643, Non-destructive testing of welds - Eddy current examination of welds by complex plane
analysis (ISO 17643)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CEN/TS 16769 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1
test
technical operation(s) for determining one or more characteristics according to a specified procedure to
identify differences between specified, expected and actual results
[SOURCE: EN ISO 10286:2021]
3.2
inspection
evaluation of conformity by observation and judgment accompanied as appropriate by measurement,
examination, testing or gauging
[SOURCE: EN ISO 10286:2021]
4 Initial inspection and testing
Pressure vessels of road tankers and their equipment shall undergo, either together or separately, an
initial inspection and testing before being put into service by inspection bodies approved by the
competent authority. These inspections and tests shall include:
— a check of conformity to the approved type in accordance with 6.2;
— a check of the design characteristics;
— an examination of the internal and external conditions in accordance with 6.3 and 6.4;
— a hydraulic pressure test in accordance with 6.6;
— a leakproofness test in accordance with 6.7;
— a check of satisfactory operation of the equipment.
NOTE For the pressure vessels of road tankers and their equipment, the inspections and the tests in 6.6 and
6.7 conforming to the requirements of ADR see 6.8.2.4 of ADR.
5 In-service inspection and testing
The requirements for in-service inspection and testing, as detailed below, shall apply to pressure vessels
designed and manufactured in accordance with EN 12493 or EN 14025 and equipped in accordance with
EN 12252, but can also be used for existing pressure vessel designs.
All service equipment including every permanently attached hoses shall be inspected in the mounted
position for correct functioning and satisfactory condition (e.g. regarding wear).
The following inspections/tests/checks shall be carried out, under the supervision of the inspector, in
accordance with Table 1.
NOTE According to ADR testing, inspection and certification duties are allocated to either the competent
authority or to inspection bodies. ADR includes detailed requirements on the qualification, obligations,
accreditation and approval of these inspection bodies as well as the frequency for inspections and tests.
Table 1 — Frequency of required inspections/tests
Intermediate
Description Clauses Periodic Inspection
Inspection
Necessary documents 6.2 Inspection Inspection
Interior of the pressure vessel 6.3 — Inspection
Exterior of the pressure vessel 6.4 Inspection Inspection
Hydraulic pressure 6.6 — Test
Leakproofness 6.7 Test Test
Contents gauge 6.5 Inspection Inspection
Pressure gauge 6.5 Inspection Inspection
Foot valve 6.5 Inspection Inspection
External stop-valve 6.5 Inspection Inspection
Blanking flange or cap 6.5.1 Inspection Inspection
Drain valves 6.5 Inspection Inspection
a
6.5 Inspection Inspection
Temperature gauge
c
Test /Inspection
and check of
b
6.5.1, 6.8.1 Test
Pressure relief valve (PRV)
satisfactory
operation
a
6.5.5 Inspection Inspection
Sun shield
d
Pipework Test Test
6.6.4 , 6.7
Emergency shut-down system 6.8.2 Test Test
Hose assemblies 6.8.3 Inspection Test
Thermal expansion valves 6.5.1, 6.5.2 Inspection Inspection
Valves 6.5 Inspection Inspection
a
6.5.1, 6.5.2 Inspection Inspection
Compressor
a
6.5.1, 6.5.2 Inspection Inspection
Pump
a
6.5.1, 6.5.2 Inspection Inspection
Hose reel
a
6.5.6 Inspection Inspection
Metering system
Earth connection 6.4.2 Inspection Inspection
a
6.5 Inspection Inspection
Earth reel
a
6.5.2 Inspection Inspection
Filters and strainers
a
Optional equipment according to EN 12252:2022, Table 1.
b
Optional equipment for road tankers constructed prior to 2023, but mandatory for road tankers constructed after
2023.
c
For the requirement to inspect or test PRV
...