SIST EN 12252:2006
(Main)LPG equipment and accessories - Equipping of LPG road tankers
LPG equipment and accessories - Equipping of LPG road tankers
This European Standard specifies equipment and accessories for road tankers used for the transport of Liquefied Petroleum Gas (LPG) and identifies the equipment that is considered necessary to ensure that filling, transportation and discharge operations can be carried out safely. It also specifies the requirements for the assembly of the accessories and the vehicle LPG equipment to the road tanker.
This European Standard also identifies additional equipment and accessories that may be used on road tankers carrying LPG.
NOTE This European Standard does not preclude the use of alternative designs, materials and equipment testing which provide a similar level of safety.
This European Standard does not apply to "tank-containers" and "battery-vehicles" used for the transportation of LPG.
Flüssiggas-Geräte und Ausrüstungsteile - Ausrüstung von Straßentankwagen für Flüssiggas (LPG)
Diese Europäische Norm legt die Ausstattung und das Zubehör von Straßentankwagen fest, die zum Transport von Flüssiggas (LPG) eingesetzt werden, und beschreibt die als notwendig betrachtete Ausrüstung zur sicheren Durchführung von Füll-, Transport- und Entleerungsvorgängen. Sie legt auch die Anforderungen an den Zusammenbau des Zubehörs und die Fahrzeugausrüstung für Flüssiggas (LPG) von Straßentankwagen fest.
Die Europäische Norm beschreibt auch zusätzliche Ausrüstung und Zubehör, die auf mit Flüssiggas beladenen Straßentankwagen verwendet werden können.
ANMERKUNG Diese Europäische Norm sollte nicht die Anwendung alternativer Auslegungen, Werkstoffe und Ausrüstungen ausschließen, um zu überprüfen, welche ein gleichwertiges Sicherheitsniveau haben.
Diese Norm gilt nicht für "Tankcontainer" bzw. "Batterie-Fahrzeuge", die beim Transport von Flüssiggas Verwendung finden.
Equipements pour GPL et leurs accessoires - Equipements des camions citernes pour GPL
La présente Norme européenne spécifie les équipements et accessoires pour camions-citernes destinés au transport de gaz de pétrole liquéfié (GPL) et identifie les équipements considérés comme nécessaires pour que les opérations de remplissage, de transport et de déchargement puissent etre effectuées en toute sécurité. Elle spécifie également les exigences relatives a l’assemblage des accessoires et des équipements GPL du véhicule sur le camion-citerne.
La présente Norme européenne identifie également les équipements et accessoires supplémentaires qui peuvent etre utilisés sur des camions-citernes destinés au transport de GPL.
NOTE La présente Norme européenne n’exclut pas l’utilisation de conceptions, de matériaux et de méthodes d’essais des équipements qui different, a condition qu’ils présentent un niveau de sécurité équivalent.
La présente Norme européenne ne s’applique pas aux "conteneurs-citernes", ni aux "véhicules batteries" utilisés pour le transport du GPL.
Oprema in pribor za utekočinjeni naftni plin (UNP) – Opremljanje cestnih prevoznih cistern za UNP
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 12252:2006
01-marec-2006
1DGRPHãþD
SIST EN 12252:2001
2SUHPDLQSULERU]DXWHNRþLQMHQLQDIWQLSOLQ 813 ±2SUHPOMDQMHFHVWQLKSUHYR]QLK
FLVWHUQ]D813
LPG equipment and accessories - Equipping of LPG road tankers
Flüssiggas-Geräte und Ausrüstungsteile - Ausrüstung von Straßentankwagen für
Flüssiggas (LPG)
Equipements pour GPL et leurs accessoires - Equipements des camions citernes pour
GPL
Ta slovenski standard je istoveten z: EN 12252:2005
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
SIST EN 12252:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 12252:2006
---------------------- Page: 2 ----------------------
SIST EN 12252:2006
EUROPEAN STANDARD
EN 12252
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 43.080.10 Supersedes EN 12252:2000
English Version
LPG equipment and accessories - Equipping of LPG road
tankers
Equipements pour GP et leurs accessoires - Equipements Flüssiggas-Geräte und Ausrüstungsteile - Ausrüstung von
des camions citernes pour GPL Straßentankwagen für Flüssiggas (LPG)
This European Standard was approved by CEN on 26 October 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12252:2005: E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
Contents Page
Foreword .4
1 Scope .5
2 Normative references .5
3 Terms and definitions.6
3.3 Equipment .7
4 Requirements .7
4.1 General .7
4.2 Equipment .7
4.3 Valve access.8
5 Tank .8
5.1 Design, and manufacture .8
5.2 Mounting of tank on road tanker.8
5.2.1 General .8
5.2.2 Mounting.8
6 Tank accessories .9
6.1 Required tank accessories.9
6.1.1 Contents gauge.9
6.1.2 Pressure gauge .9
6.1.3 Primary shut-off system .9
6.2 Optional tank accessories.10
7 Road tanker LPG equipment.10
7.1 Required LPG equipment .10
7.1.1 General .10
7.1.2 Pipework.10
7.1.3 Connecting hoses.10
7.1.4 Thermal expansion valves/hydrostatic relief valves .11
7.1.5 Valves .11
7.2 Optional LPG equipment .11
8 Equipment specifications.11
8.1 Suitable materials .11
8.1.1 General .11
8.1.2 Steel pressure retaining parts.11
8.1.3 Non-pressure retaining parts.11
8.1.4 Welding consumables .12
8.1.5 Non-metallic materials.12
8.1.6 Pipework.12
8.1.7 Certification of materials .12
8.1.8 Control of materials .12
8.2 Contents gauge.13
8.3 Pressure gauge .13
8.4 Temperature gauge.13
8.5 Pump.13
8.6 Hoses .13
8.7 Hose reel.14
8.8 Earth reel .14
8.9 Metering system.14
8.10 Valves .14
8.11 Pressure relief valves (PRVs).14
2
---------------------- Page: 4 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
9 Assembly.14
9.1 General .14
9.2 Welding.15
9.2.1 Welding of the pressure containing parts.15
9.2.2 Welding of the non pressure containing parts .15
9.3 Flanged connections .15
9.4 Screwed connections .15
9.5 Pressure test .15
9.6 Leak test .16
9.7 External corrosion protection.16
10 Safety systems.16
10.1 General .16
10.2 Emergency Shut-Down system (ESD).17
11 General safety requirements.17
Annex A (informative) Discharge rates for pressure relief valves.18
A.1 Setting.18
A.2 Discharge capacity .18
Annex B (informative) Calculation of mountings of tank to the chassis.20
B.1 General .20
B.2 Mounting of tank to the chassis .21
B.2.1 Fixing rods.21
B.2.2 Bolts.22
B.2.3 Bracket welds.22
B.2.4 Allowable stress.22
B.2.5 Typical mounting (example).23
B.3 Calculation of fixing rods .23
B.3.1 In the direction of travel .23
B.3.2 At right angles to the direction of travel .24
B.3.3 Vertically upwards .24
B.4 Calculation of the bracket welds .24
B.4.1 General .24
B.4.2 In the direction of travel .25
B.4.3 At right angles to the direction of travel .25
B.4.4 Vertically upwards .25
B.5 Calculation of fixing bolts .25
B.5.1 In the direction of travel .26
B.5.2 At right angles to the direction of travel .26
B.5.3 Vertically upwards .26
Bibliography.27
3
---------------------- Page: 5 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
Foreword
This European Standard (EN 12252:2005) 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 June 2006, and conflicting national standards shall be withdrawn at
the latest by June 2006.
This document supersedes EN 12252:2000.
The European Standard 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 European Standard are normative only when the standards themselves are referred to in
the technical annexes of the ADR.
The following main changes have been made since the 2000 edition:
alignment with ADR 2005, 6.8.3.2.3 (liquid discharge);
inclusion of references to European Standards for materials, welding, fittings etc.
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.
4
---------------------- Page: 6 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
1 Scope
This European Standard specifies equipment and accessories for road tankers used for the transport of
Liquefied Petroleum Gas (LPG) and identifies the equipment that is considered necessary to ensure that filling,
transportation and discharge operations can be carried out safely. It also specifies the requirements for the
assembly of the accessories and the vehicle LPG equipment to the road tanker.
This European Standard also identifies additional equipment and accessories that may be used on road tankers
carrying LPG.
NOTE This European Standard does not preclude the use of alternative designs, materials and equipment testing
which provide a similar level of safety.
This European Standard does not apply to "tank-containers" and "battery-vehicles" used for the transportation
of LPG.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels
EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 558-1, Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged
pipe systems — Part 1: PN-designated valves
EN 729-2, Quality requirements for welding — Fusion welding of metallic materials — Part 2: Comprehensive
quality requirements
EN 729-3, Quality requirements for welding — Fusion welding of metallic materials — Part 3: Standard quality
requirements
EN 837-2, Pressure gauges — Part 2: Selection and installation recommendations for pressure gauges
EN 1012-1, Compressors and vacuum pumps — Safety requirements — Part 1: Compressors
EN 1418, Welding personnel — Approval testing of welding operators for fusion welding and resistance weld
setters for fully mechanized and automatic welding of metallic materials
EN 1591-1, Flanges and their joints — Design rules for gasketed circular flange connections — Part 1:
Calculation method
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
prEN 1983, Industrial valves — Steel ball valves
EN 1984, Industrial valves — Steel gate valves
EN 10025 (all parts), Hot rolled products of structural steels
EN 10028 (all parts), Flat products made of steels for pressure purposes
5
---------------------- Page: 7 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
EN 10045-1, Metallic materials — Charpy impact test — Part 1: Test method
EN 10204:2004, Metallic products — Types of inspection documents
EN 10216-1, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 1: Non-alloy
steel tubes with specified room temperature properties
EN 10217-1, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 1: Non-alloy
steel tubes with specified room temperature properties
EN 12074, Welding consumables — Quality requirements for manufacture, supply and distribution of con-
sumables for welding and allied processes
EN 12493, Welded steel tanks for liquefied petroleum gas (LPG) — Road tankers — Design and manufacture
EN 12627, Industrial valves — Butt welding ends for steel valves
EN 12760, Valves — Socket welding ends for steel valves
EN 13175, Specification and testing for Liquefied Petroleum Gas (LPG) tank valves and fittings
EN 13709, Industrial valves — Steel globe and globe stop and check valves
EN 13789, Industrial valves – Cast iron globe valves
EN 13799, Contents gauges for LPG tanks
EN 14422, Clamp type coupling assemblies for LPG transfer hoses
EN 14424, Hose fittings with screwed ferrules
EN ISO 10497, Testing of valves — Fire type-testing requirements (ISO 10497:2004)
EN ISO 15609-1:2004, Specification and qualification of welding procedures for metallic materials – Welding
procedure specification – Part 1: Arc welding (ISO 15609-1:2004)
EN ISO 15614-1:2004, Specification and qualification of welding procedures for metallic materials – Welding
procedure test – Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-
1:2004)
3 Terms and definitions
For the purposes of this European Standard, 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
primary shut-off system
valve or a series of valves attached to the tank which provides a method of closing the tank
6
---------------------- Page: 8 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
3.3 Equipment
3.3.1
vehicle LPG equipment
equipment and pipework on the road tanker 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
3.3.2
tank
pressure vessel containing the LPG, connecting nozzles and welded attachments
3.3.3
accessories
fittings connected to the tank
3.4
thermowell
permanently sealed pocket in the tank/pipework for the temperature gauge
3.5
pipework
fabricated tubes and fittings which interconnect the tank, valves and equipment
3.6
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.
4 Requirements
4.1 General
Equipment, when assembled, shall be of such a nature that they withstand the anticipated mechanical,
chemical and thermal stresses and remain tight. In particular they shall be:
manufactured of materials which give the finished equipment the required mechanical properties; in
particular, where equipment is subject to the low temperatures (including low temperatures caused by
filling), suitably ductile material shall be used;
protected against accidental damage where such damage could lead to a dangerous escape of LPG.
4.2 Equipment
This European Standard covers mandatory and optional equipment to be fitted to LPG road-tankers in
accordance with Table 1.
7
---------------------- Page: 9 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
Table 1 — Road-tanker equipment
Description Clauses Mandatory Optional
Tank accessories
Contents gauge 6.1.1 / 8.2 X
Pressure gauge 6.1.2 / 8.3 X
Primary shut-off system 6.1.3 X
Temperature gauge 6.2 / 8.4 X
Pressure relief valve (PRV) 6.2 / 8.11 X
Sun shield 6.2 X
Road tanker LPG equipment
Pipework 7.1.2 / 8.1.6 X
Emergency shut-down system 10.2 X
Hoses 7.1.3 / 8.6 X
Thermal expansion valves/hydrostatic relief valves 7.1.4 X
Valves 7.1.5 /8.10 X
Compressor 7.2 X
Pump 7.2/ 8.5 X
Hose reel 7.2/ 8.7 X
Metering system 7.2/ 8.9 X
Earth reel 7.2/ 8.8 X
4.3 Valve access
Valves required for normal and emergency operation shall be readily accessible or remotely operated.
5 Tank
5.1 Design, and manufacture
The tank shall be designed and manufactured in accordance with EN 12493.
5.2 Mounting of tank on road tanker
5.2.1 General
The tank and fastenings to the structure of the road tanker shall be designed and constructed to absorb safely
the stresses from normal use such as surge, vibration, braking action etc.
5.2.2 Mounting
5.2.2.1 The fixing of the tank to the road tanker shall be designed in accordance with a calculation based
on the forces given in Table 2.
8
---------------------- Page: 10 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
Table 2 — Forces for fixing the tank to the road tanker
Direction of force Force
N
In the driving direction 2 g x total mass of tank
Horizontal, at 90° to the driving direction 1 g x total mass of tank
Vertical, upwards 1 g x total mass of tank
Vertical, downwards 2 g x total mass of tank
The total mass of the tank shall be taken as the tare mass plus the maximum allowable mass of the contents.
g = gravitational acceleration.
5.2.2.2 A sample method of calculation for the mountings of the tank to the chassis is contained in
Annex B.
5.2.2.3 The tank shall be electrically continuous with the chassis. The resistance of this electrical path
shall not exceed 10 Ω.
5.2.2.4 If the tank, while on the chassis, will be subjected to a hydraulic test, during which the tank can
contain twice the normal weight of its normal operating capacity it shall be established that the chassis is
capable of taking this weight.
6 Tank accessories
6.1 Required tank accessories
6.1.1 Contents gauge
6.1.1.1 Tanks shall be equipped with a suitable contents gauge. The requirements of EN 12493 for
maximum fill shall apply.
6.1.1.2 If the contents of the tank are to be measured by volume rather than by weight, then at least two
independent systems of measuring the contents shall be fitted, only one of which can be a fixed liquid level
gauge.
6.1.2 Pressure gauge
Tanks shall be equipped with a pressure gauge in accordance with 8.3.
6.1.3 Primary shut-off system
6.1.3.1 All connections to the tank in excess of 1,5 mm diameter, other than those for pressure relief
valves or those permanently fitted with blank flanges or plugs, shall incorporate a primary shut-off system.
6.1.3.2 The primary shut-off system shall be of a design intended to limit the release of the tank's content
in the event of external damage.
6.1.3.3 The primary shut-off system required depends upon the purpose of the tank connection as
follows:
a) Discharge/filling to liquid phase:
9
---------------------- Page: 11 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
A normally closed internal shut-off valve opened by hydraulic, pneumatic or mechanical power from the
road tanker. The valve shall be designed for rapid closure on command (see 10.2). The system shall
incorporate a thermally sensitive device or other means that will ensure positive closure in the event of a
fire and shall incorporate an excess flow valve facility.
b) Filling to vapour phase:
The road tanker filling connection shall be provided with:
a non return valve or a series of non return valves in combination with a manual shut-off valve, or
a normally closed internal shut-off valve opened by hydraulic, pneumatic or mechanical power from
the road tanker along with an anti-drive-away system/emergency-shut down system.
c) Other liquid or vapour piped connections:
An internal excess flow valve or internal - non-return valve in series combination with a manual shut-off
valve shall be provided.
6.1.3.4 In the liquid discharge line at least one hand operated or remotely operated valve shall be
positioned as close as reasonable to the tank outlet after the internal shut-off valve.
6.1.3.5 The remotely operated shut-off valves shall be in the closed position during transport.
6.2 Optional tank accessories
If any of the these optional accessories are fitted, the following requirements shall apply:
a) temperature gauges shall be in accordance with 8.4;
b) pressure relief valves (PRVs) shall be sized in accordance with 8.11 and Annex A;
c) sun shields shall be designed in accordance with EN 12493.
7 Road tanker LPG equipment
7.1 Required LPG equipment
7.1.1 General
LPG equipment and pipework shall be protected against mechanical damage, by its design or location and/or
by barriers.
7.1.2 Pipework
Mechanical barriers shall not be attached to pipework or valves, which they are intended to protect. The
pipework shall be installed so as to prevent damage due to vibration.
The number of joints shall be kept to a minimum. Joints shall be welded or weld flanged except if permitted by
9.4.
7.1.3 Connecting hoses
Connecting hoses for pipework/equipment shall be in accordance with 8.6.
10
---------------------- Page: 12 ----------------------
SIST EN 12252:2006
EN 12252:2005 (E)
7.1.4 Thermal expansion valves/hydrostatic relief valves
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.