oSIST prEN 14334:2010
(Main)LPG equipment and accessories - Inspection and testing of LPG road tankers
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 tank, tank accessories and vehicle LPG equipment.
This document does not specify requirements for the initial inspection (after manufacture) of a tank, see
EN 12493 or the road tanker, see EN 12252.
NOTE 1 There is no upper size limit for the tank as this will be determined by the gross vehicle weight limitation.
NOTE 2 For inspection and testing requirements of equipment other than the tank, tank 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 der Tanks, dem Tankzubehör und der Flüssiggas-Fahrzeugausrüstung
(LPG) fest.
Dieses Dokument enthält keine Anforderungen an die erstmalige Prüfung (nach der Herstellung) des Tanks,
siehe EN 12493 oder des Straßentankwagens, siehe EN 12252.
ANMERKUNG 1 Es besteht keine obere Begrenzung für die Größe der Tanks, da diese durch die Bruttomasse des
Fahrzeugs begrenzt wird.
ANMERKUNG 2 Für die Inspektions- und Prüfanforderungen von anderen Ausrüstungsteilen als Tanks und Flüssiggas-
Ausrüstung, siehe die jeweiligen internationalen/nationalen Bestimmungen.
Oprema in pribor za utekočinjeni naftni plin (UNP) - Pregledi in preskušanje cestnih cistern za utekočinjeni naftni plin (UNP)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 14334:2010
01-september-2010
2SUHPDLQSULERU]DXWHNRþLQMHQLQDIWQLSOLQ 813 3UHJOHGLLQSUHVNXãDQMH
UH]HUYRDUMHY]DXWHNRþLQMHQLQDIWQLSOLQ 813 ]DSUHYR]SRFHVWL
LPG equipment and accessories - Inspection and testing of LPG road tankers
Flüssiggas-Geräte und Ausrüstungsteile - Inspektion und Prüfung von
Straßentankwagen für Flüssiggas (LPG)
Ta slovenski standard je istoveten z: prEN 14334 rev
ICS:
43.080.10 Tovornjaki in priklopniki Trucks and trailers
oSIST prEN 14334:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 14334:2010
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oSIST prEN 14334:2010
EUROPEAN STANDARD
DRAFT
prEN 14334
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2010
ICS 43.080.10 Will supersede EN 14334:2005
English Version
LPG equipment and accessories - Inspection and testing of LPG
road tankers
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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14334:2010: E
worldwide for CEN national Members.
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Contents Page
Foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .7
4 Inspection and testing .8
5 Inspection and testing requirements .9
5.1 General .9
5.2 Inspection of the necessary documents .9
5.3 Inspection of the tank interior .9
5.4 Inspection of the tank exterior .9
5.4.1 External visual inspection .9
5.4.2 Inspection of earth . 10
5.4.3 Inspection procedure - Inspection of the tank . 10
5.4.4 Inspection criteria . 10
5.5 Hydraulic pressure test of tank . 11
5.5.1 General . 11
5.5.2 Hydraulic test pressure . 11
5.5.3 Hydraulic pressure test liquid . 11
5.5.4 Pressurisation . 11
5.5.5 Test duration . 11
5.5.6 Measurement . 11
5.5.7 Evaluation of the test . 12
5.5.8 Alternatives to the periodic hydraulic test . 12
5.6 Inspection of the vehicle LPG equipment and tank accessories . 13
5.6.1 Inspection . 13
5.6.2 Satisfactory operation . 13
5.6.3 Hose end couplings . 13
5.6.4 Emergency Shut-Down system (ESD) . 14
5.7 Leakproofness test . 14
5.7.1 General . 14
5.7.2 Leakproofness test pressure . 14
5.7.3 Extent of test . 14
5.7.4 Evaluation of the test . 14
5.8 Inspection of tank or structural equipment after repair. 14
5.9 Re-inspection . 15
6 Inspection certificate and marking . 15
6.1 Certification of periodic, intermediate inspection and exceptional check . 15
6.2 Marking . 15
Annex A (informative) Road tanker inspection/check certificate . 16
Annex B (normative) Minimum requirements for acoustic emission testing (AT) of road tankers . 17
B.1 Scope . 17
B.2 Test procedures . 17
B.3 Instrumentation . 17
B.3.1 Sensors . 17
B.3.2 Acquisition and evaluation system. 17
B.4 Testing . 18
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B.4.1 Test instruction . 18
B.4.2 Safety precautions . 18
B.4.3 Sensor location . 18
B.4.4 Pressurisation . 18
B.5 Data evaluation and analysis . 18
B.5.1 Evaluation criteria . 18
B.5.2 Real time control . 19
B.5.3 AE source severity grading . 19
B.6 Test result, data storage and reporting . 19
Annex C (informative) Methods of gas freeing . 21
C.1 Preparation for gas freeing. 21
C.2 Methods of gas freeing . 21
C.2.1 By water . 21
C.2.2 By inert gas . 21
C.2.3 By steam . 22
C.2.4 By vacuum pump or compressor . 22
Annex D (informative) Environmental Checklist . 23
Bibliography . 24
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Foreword
This document (prEN 14334:2010) 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 will supersede EN 14334:2005.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports the objectives of the framework Directives on Transport of
Dangerous Goods.
This document has been submitted for reference into the technical annexes of the ADR.
Therefore the standards listed in the normative references and covering basic requirements of the ADR not
addressed within the present standard are normative only when the standards themselves are referred to in
the technical annexes of the ADR.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
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Introduction
This document calls for the use of substances and procedures that may 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 tank 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. Protection of the environment
is taken in a very broad sense. What is meant is the total life cycle aspects of, e.g. a product on the
environment, including expenditure of energy and during all phases from mining of raw materials, fabrication,
packaging, distribution, use, scrapping, recycling of materials, etc.
NOTE Annex D indicates which clauses in this standard address environmental issues.
Provisions have to be restricted to a general guidance. Limit values are specified in national laws.
It is recommended that companies using this standard develop an environmental management policy. For
guidance see ISO 14000 series
It has been assumed in the drafting of this document that the execution of its provisions is entrusted to
appropriately qualified and experienced people.
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1 Scope
This document specifies minimum requirements for the inspection and testing of the LPG road tanker, which
includes its tank, tank accessories and vehicle LPG equipment.
This document does not specify requirements for the initial inspection (after manufacture) of a tank, see
EN 12493 or the road tanker, see EN 12252.
NOTE 1 There is no upper size limit for the tank as this will be determined by the gross vehicle weight limitation.
NOTE 2 For inspection and testing requirements of equipment other than the tank, tank accessories and vehicle LPG
equipment, see applicable regulations.
2 Normative references
The following referenced documents are indispensable for the application 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 444, Non-destructive testing — General principles for radiographic examination of metallic materials by
X- and gamma-rays.
EN 473, Non destructive testing — Qualification and certification of NDT personnel — General principles
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 1290, Non-destructive examination of welds — Magnetic particle examination of welds.
EN 1435, Non-destructive examination of welds — Radiographic examination of welded joints.
EN 1711, Non-destructive examination of welds — Eddy current examination of welds by complex plane
analysis
EN 1714, Non destructive examination of welds — Ultrasonic examination of welded joints.
EN 12252, Equipping of Liquefied Petroleum Gas (LPG) road tankers.
EN 12493, Welded steel tanks for liquefied petroleum gas (LPG) — Road tankers — Design and manufacture.
EN 13109, LPG tanks – Disposal
EN 13175, LPG equipment and accessories – Specification and testing for Liquefied Petroleum Gas (LPG)
tank valves and fittings
EN 13477-1, Non-destructive testing — Acoustic emission — Equipment characterisation — Part 1:
Equipment description
EN 13477-2, Non-destructive testing — Acoustic emission — Equipment characterisation — Part 2:
Verification of operating characteristic
EN 13554:2002, Non-destructive testing — Acoustic emission — General principles
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EN 14584:2005, Non-destructive testing — Acoustic emission — Examination of metallic pressure equipment
during proof testing — Planar location of AE sources
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
LPG (liquefied petroleum gas)
mixture of predominantly butane or propane with traces of other hydrocarbon gases classified in accordance
with UN number 1965, hydrocarbon gases mixture, liquefied, NOS or UN number 1075, petroleum gases,
liquefied
NOTE In some countries, UN numbers 1011 and 1978 may also be designated LPG.
3.2
periodic inspection
inspection / test to be carried out at specified intervals in order to confirm that the tank is fit for a further period
of service
3.3
intermediate inspection
inspection to be carried out between the initial and first periodic inspection, or between two periodic
inspections, the results of which are recorded
3.4
vehicle LPG equipment
equipment and pipework on the vehicle which is in contact with LPG and forms part of the LPG operating
system, shut-down system or safety system, but which is not directly connected to the tank and is not part of
the LPG fuel system
3.5
tank accessories
equipment directly connected to the tank used for filling, discharge, venting, measuring, insulating or pressure
relief
3.6
repair
correction of a defect which has impaired the safety of the tank or its structural equipment, not including
normal service and maintenance operations and/or replacements of gaskets, vehicle LPG and tank
accessories
3.7
road tanker
rigid vehicle, semi-trailer or trailer comprising of one or more fixed tanks
NOTE Referred to as fixed tanks (tank-vehicles) and demountable tanks in the ADR.
3.8
exceptional check
inspection/test outside the frequency of intermediate and periodic inspections/tests
3.9
gas-free
without a concentration of LPG in the tank that can affect the health and safety of the inspecting personnel
NOTE See national regulations.
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3.10
inspector
individual or a body approved by the competent authority to perform designated inspections and tests
3.11
competent person
person who by a combination of training, experience and supervision is able to make objective judgments on
the subject
3.12
structural equipment
external reinforcing, fastening or stabilizing member of the shell, being an integral part of and directly welded
to the shell, or to a backing plate on the shell
4 Inspection and testing
The requirements for inspection and testing, as detailed below, shall apply to tanks designed and
manufactured in accordance with EN 12493 and equipped in accordance with EN 12252, but can also be
used for existing tank designs.
The following inspections/tests/checks shall be carried out in accordance with Table 1.
NOTE The frequency of the inspections/tests is being given by ADR.
Table 1 — Required inspections/tests
a
Inspections/Tests Clause Intermediate Periodic Exceptional checks
Necessary documents 5.2 X X X
Tank interior 5.3 - X X
Tank exterior 5.4 X X X
Hydraulic pressure 5.5 - X X
Tank accessories 5.6 - X X
Vehicle LPG equipment 5.6 - X X
Leakproofness 5.7 X X X
Structural equipment – after repair 5.8 - - X
a
As appropriate to the repair. If the tank is being remounted then all inspections shall be as for the original construction, as appropriate
to the repair.
An exceptional check may be required when the safety of the tank accessories, vehicle LPG equipment, the
tank, or structural equipment may have been impaired as a result of repairs, alterations or accidents.
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5 Inspection and testing requirements
5.1 General
Additional inspections/tests/checks can be required, subject to the results of the inspections/tests/checks
required by 5.
Precautions shall be taken for the safety of the inspecting personnel, and any other personnel in the vicinity of
the road tanker, when inspections/tests are carried out.
5.2 Inspection of the necessary documents
The following documents shall be provided for the inspection:
certificate of initial inspection, or
certificate of last periodic inspection,
certificate of intermediate inspection/ exceptional check, if applicable.
The documents shall be inspected to ensure that they are relevant to the tank and vehicle LPG equipment,
and that they are satisfactory. Additional requirements and remarks in these documents shall be taken into
account.
5.3 Inspection of the tank interior
The tank shall be empty, clean, certified gas-free and safe to enter at the time of inspection. Suitable methods
for gas freeing are given in Annex C.
A complete visual internal inspection shall be performed.
The entire surface of the tank shall be inspected for:
surface defects such as dents, cuts, gouges, bulges, cracks;
other defects indicating possible abnormal operating conditions.
NOTE The inspector may request that this inspection is supplemented by NDT-techniques, see 5.5.1.
Surface defects deemed to impair the integrity of the tank shall be repaired or the tank shall be rejected from
service and disposed of safely in accordance with EN 13109.
If the tank is to be scrapped, as much material as possible shall be recycled.
5.4 Inspection of the tank exterior
5.4.1 External visual inspection
A complete visual inspection shall be performed.
The visual inspection of the tank exterior shall include:
the identification of any surface defect. In case of doubt, appropriate non-destructive methods can be
used;
the condition of the protective coating;
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the fastenings of the tank and its structural equipment;
the marking of the tank, which shall be verified against the requirements of 6.2.
5.4.2 Inspection of earth
Road tankers with an earth connection shall be inspected for conformity of the connection with the design
requirements. The electrical resistance between the earth connection and the metallic parts of the tank /
vehicle chassis, shall not exceed 10 Ω.
5.4.3 Inspection procedure - Inspection of the tank
The entire surface of the tank shall be inspected for:
surface defects such as dents, cuts, gouges, bulges, cracks;
corrosion, giving special attention to areas where water can be trapped, to the base of the tank, to the
connection between the tank and the support structure and around the tank connections;
other defects indicating possible abnormal operating conditions, external forces, signs of fire
impingement.
5.4.4 Inspection criteria
5.4.4.1 Surface defects
If surface defects are identified, the inspector shall determine the appropriate actions for repair, or disposed of
safely in accordance with EN 13109.
If the tank is to be scrapped, as much material as possible shall be recycled.
5.4.4.2 Surface corrosion
Where corrosion is detected rejection criteria are set out in Table 2.
Table 2 — Corrosion limits
Defect Description Rejection criteria
Isolated corrosion pits Pitting of metal occurring in Depth of discrete pits exceeds 0,6 mm. A greater depth
isolated areas can be accepted providing that the depth of penetration
does not reduce the wall thickness below the minimum
required thickness.
Area corrosion Reduction in wall thickness over Depth of penetration of any pit is more than 0,4 mm. A
an area not exceeding 20 % of greater depth can be accepted providing that the depth of
the tank surface. penetration does not reduce the wall thickness below the
minimum required thickness.
General corrosion Reduction in the wall thickness Depth of penetration of any pit is more than 0,2 mm. A
over an area exceeding 20 % of greater depth can be accepted providing that the depth of
the tank surface. penetration does not reduce the wall thickness below the
minimum required thickness.
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If surface corrosion is not the cause for rejection, then a suitable corrosion protection system shall be applied
to the road tanker. If the tank has been rejected due to corrosion, it may be either disposed of safely in
accordance with EN 13109 or undergo a detailed special investigation in consultation with the inspector in
order to determine a suitable method for repair.
If the tank is to be scrapped, as much material as possible shall be recycled.
5.4.4.3 Abnormal surface conditions
If abnormal surface conditions are detected, the inspector shall review the design documents and the initial
inspection report and / or other previous inspection reports, if any, and decide what further action is required.
5.5 Hydraulic pressure test of tank
5.5.1 General
Before the beginning of the test, the outside surface of the tank shall be sufficiently dry and clean so that any
leakage can be detected on the tank shell. If the ambient temperature is below 5 °C a hydraulic pressure test
with water is only allowed if precautions are taken to prevent the water from freezing.
5.5.2 Hydraulic test pressure
The test pressure shall be as shown on the tank nameplate, this is normally 1,3 times the design pressure.
5.5.3 Hydraulic pressure test liquid
The liquid normally used for hydraulic pressure testing is water.
Care shall be taken with the disposal of the liquid to avoid environmental contamination.
5.5.4 Pressurisation
The tank shall be totally filled with the test liquid; taking care that no gas pockets remain before pressure is
gradually applied.
A safety device shall be included in the hydraulic pressure system. The device shall be set so that the
pressure in the tank does not exceed 105 % of the required test pressure.
5.5.5 Test duration
The test pressure shall be held for the time necessary for the inspection to be carried out but not less than
15 min.
5.5.6 Measurement
The test pressure shall be measured by a pressure gauge. Pressure gauges shall be in accordance with
EN 837-1:1996 and EN 837-3:1996 (class 1,6 or better). Pressure gauges shall have an accuracy at least
equal to 4 % of the reading. The test pressure of the tank shall give a reading on the gauge between 50 %
and 90 % of full scale deflection.
NOTE Alternative methods of pressure measurement (e.g. by transducer) may be used if they achieve equivalent
accuracy.
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5.5.7 Evaluation of the test
The tank fails the hydraulic pressure test if there is any visible permanent deformation caused by the test
pressure or if a leak is detected on the tank shell. In the event of failure the tank may be repaired with the
agreement of the inspector and retested or disposed of safely in accordance with EN 13109.
If the tank is to be scrapped, as much material as possible shall be recycled.
5.5.8 Alternatives to the periodic hydraulic test
5.5.8.1 General
With the agreement of the inspector, the periodic hydraulic test can be replaced by non-destructive testing
(NDT) that verifies the integrity of the parent metal and the construction welding along with a leakproofness
test and gives at least the same level of safety as that afforded by the hydraulic test. The following two
clauses identify two alternatives to periodic hydraulic test, ultrasonic test in combination with magnetic particle
test and acoustic emission in combination
...
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