SIST EN 13799:2003
(Main)Contents gauges for LPG tanks
Contents gauges for LPG tanks
This European Standard specifies requirements for contents gauges for commercial LPG service and which are directly connected to mobile or static pressure vessels above 0.5 litres water capacity excluding these used for automotive tanks. This European Standard is intended to set minimum requirements for contents gauges for specific use with commercial LPG.
Füllstandsanzeiger für Flüssiggasbehälter
Diese Europäische Norm legt Mindestanforderungen an Füllstandsanzeiger fest, die direkt mit ortsbeweglichen oder ortsfesten Druckbehältern mit einem Rauminhalt von über 0,5 l verbunden sind. Ausgenommen sind Füllstandsanzeiger für Autogastanks.
Überfüllsicherungen mit integrierten Füllstandsanzeigern sind ebenfalls in der Norm erfasst.
Jauges de niveau pour réservoirs de GPL
La présente norme européenne spécifie les prescriptions relatives aux jauges de niveau pour l'utilisation du GPL commercial, directement reliées aux récipients sous pression mobiles ou statiques d'une contenance en eau supérieure a 0,5 litres, a l'exception de ceux utilisés pour les réservoirs d'automobiles. La présente norme européenne a pour but d'établir les prescriptions minimales relatives aux jauges de niveau pour l'utilisation spécifique avec le GPL commercial.
Kazalniki nivoja v rezervoarjih za utekočinjeni naftni plin (UNP)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13799:2003
01-december-2003
.D]DOQLNLQLYRMDYUH]HUYRDUMLK]DXWHNRþLQMHQLQDIWQLSOLQ 813
Contents gauges for LPG tanks
Füllstandsanzeiger für Flüssiggasbehälter
Jauges de niveau pour réservoirs de GPL
Ta slovenski standard je istoveten z: EN 13799:2002
ICS:
23.020.10 1HSUHPLþQHSRVRGHLQ Stationary containers and
UH]HUYRDUML tanks
SIST EN 13799:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 13799:2003
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SIST EN 13799:2003
EUROPEAN STANDARD
EN 13799
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2002
ICS 00.230; 23.020.30
English version
Contents gauges for LPG tanks
Jauges de niveau pour les réservoirs de GPL Füllstandsanzeiger für Flüssiggasbehälter
This European Standard was approved by CEN on 9 September 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, 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
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13799:2002 E
worldwide for CEN national Members.
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SIST EN 13799:2003
EN 13799:2002 (E)
Contents
page
Foreword.4
1 Scope .5
2 Normative references .5
3 Terms and definitions.6
4 Operating conditions.7
5 Materials.7
5.1 General.7
5.2 Metallic materials .7
5.3 Non-metallic components.8
5.4 Lubricants, sealants and adhesives .8
6 Design – General requirements.8
6.1 General.8
6.2 Seals.9
6.3 Springs.9
6.4 Threads .9
6.5 Flanges.9
7 Design– Specific requirements .9
7.1 Contents gauge.9
7.1.1 Float gauge.9
7.1.2 Rotary gauge .10
7.1.3 Fixed level gauge .10
7.1.4 Slip tube gauge .10
7.1.5 Other contents gauges.10
7.2 Dials for contents gauges.11
7.3 Overfill protection device.11
8 Design testing .11
8.1 General.11
8.2 Over-torquing deformation test.12
8.3 External tightness test .13
8.4 Internal tightness test.14
8.5 Endurance test .14
8.6 Hydrostatic strength test .14
8.7 Stress cracking test.15
8.7.1 General.15
8.7.2 Mercurous nitrate immersion test.15
8.7.3 Moist ammonia air stress cracking test .15
8.8 Float pressure test.15
8.9 Dimensional inspection.15
8.10 Function test.15
8.11 Accuracy assessment .15
9 Production testing and inspection.16
10 Marking .16
11 Documentation.16
Annex A (normative) Float gauge flange and gasket dimensions .17
Annex B (normative) Special low temperature requirements for gauges .20
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SIST EN 13799:2003
EN 13799:2002 (E)
Annex C (normative) Taper thread dimensions .21
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives.25
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SIST EN 13799:2003
EN 13799:2002 (E)
Foreword
This document EN 13799:2002 has been prepared by Technical Committee CEN/TC 286 "LPG 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 April 2003, and conflicting national standards shall be withdrawn at the latest by
April 2003.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
In this European Standard the annexes A, B and C are normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
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SIST EN 13799:2003
EN 13799:2002 (E)
1 Scope
This European Standard specifies minimum requirements for design and testing of contents gauges, which are
directly connected to transportable or static LPG tanks above 0,5 l water capacity excluding those used for
automotive containers.
Overfill protection devices that incorporate contents gauges are also included.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment.
EN 1092-1, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated -
Part 1: – Steel flanges.
EN 1503-1, Valves – Materials for bodies, bonnets and covers – Part 1: Steels specified in European Standards.
EN 1503-2, Valves – Materials for bodies, bonnets and covers – Part 2: Steels other than those specified in
European Standards.
EN 1503-3, Valves – Materials for bodies, bonnets and covers – Part 3: Cast Irons specified in European
Standards.
prEN 1503-4 Valves – Materials for bodies, bonnets and covers – Part 4: Copper alloys specified in European
Standards.
EN 1563, Founding – Spheroidal graphite cast irons.
EN 10270-3, Steel wire for mechanical springs – Part 3: Stainless spring steel wire.
EN 12164, Copper and copper alloys – Rod for free machining purposes.
EN 12420, Copper and copper alloys – Forgings.
EN 13906 (all Parts), Cylindrical helical springs made from round wire and bar – Calculation and design.
EN 50014, Electrical apparatus for potentially explosive atmospheres – General requirements.
EN 50015, Electrical apparatus for potentially explosive atmospheres – Oil immersion “o”.
EN 50016, Electrical apparatus for potentially explosive atmospheres – Pressurised apparatus “p”.
EN 50017, Electrical apparatus for potentially explosive atmospheres – Powder filling “q”.
EN 50018, Electrical apparatus for potentially explosive atmospheres – Flameproof enclosure “d”.
EN 50019, Electrical apparatus for potentially explosive atmospheres – Increased safety “e”.
EN 50020, Electrical apparatus for potentially explosive atmospheres – Intrinsic safety “i”.
EN 50028, Electrical apparatus for potentially explosive atmospheres – Encapsulation “m”.
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SIST EN 13799:2003
EN 13799:2002 (E)
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads – Part1: Dimensions and tolerances and
designation.
ISO 301, Zinc alloy ingots intended for casting.
ISO 6957, Copper alloys – Ammonia test for stress corrosion resistance.
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
LPG
mixture of light hydrocarbons, gaseous under standard atmospheric conditions, which can be liquefied by increased
pressure or decreased temperature. The main components are propane, propene, butane and butene isomers
3.2
contents gauge
device to indicate the liquid level or contents in a tank
NOTE This can be incorporated into an overfill protection device.
3.2.1
float gauge
device to indicate the content of a tank by means of a float on the liquid surface within the tank
3.2.2
rotary gauge
device which operates through a rotating action in order to assess the liquid level in a tank by means of temporarily
venting a limited amount of LPG, whereupon the change from liquid to vapour is detected
3.2.3
fixed level gauge
device to indicate when a predetermined liquid level in a tank has been reached or surpassed
3.2.4
slip tube
device which operates through a linear action in order to assess the liquid level in a tank by means of temporarily
venting a limited amount of LPG, where upon the change from liquid to vapour is detected
3.3
overfill protection device
device that automatically stops the filling of liquid into the tank when a predetermined level has been reached
3.4
external tightness
resistance to leakage through the gauge body to or from the atmosphere
3.5
internal tightness
resistance to leakage across the gauge seat or other internal sealing components when the gauge is closed
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SIST EN 13799:2003
EN 13799:2002 (E)
4 Operating conditions
Contents gauges designed in accordance with this standard shall be suitable for the following conditions:
the minimum operating temperature to which the device is expected to be exposed during normal use is minus
20 °C. In service temperatures below this may be encountered during short periods, for example, when filling;
in some parts of Europe and for certain applications, lower minimum operating temperatures are necessary.
Where the device is subject to more severe temperature conditions, the design temperature range shall be
extended to minus 40 °C. When gauges are designed for a temperature lower than minus 20 °C, they shall
meet the requirements of annex B;
the maximum operating temperature to which the gauge is expected to be exposed during normal operation is
60 °C. In service, this temperature may be exceeded for short periods;
the maximum allowable pressure is 25 bar;
the minimum pressure to which a gauge is normally exposed is zero bar gauge. Vacuum conditions on the
gauge, arising from butane at low temperature or evacuation of the tank can expose the device to a vacuum of
50 mbar absolute.
5 Materials
5.1 General
5.1.1 All materials in contact with LPG shall be physically and chemically compatible with LPG under all the
normal operating conditions for which the contents gauge is intended.
5.1.2 Materials for gauge components shall be selected to give adequate strength in service. Consideration shall
also be given to other modes of failure such as atmospheric corrosion, brass dezincification, stress corrosion,
impact or material failure.
5.1.3 Alternative materials to those listed in 5.2 are not precluded, providing they comply with a standard or
specification that ensures control of chemical and physical properties, and quality appropriate to the end use.
5.2 Metallic materials
5.2.1 Metallic materials for gauges shall be steel, stainless steel, copper alloys, aluminium alloys, zinc alloys, or
other suitable materials.
5.2.2 For pressure containing components:
steel and stainless steels shall comply with EN 1503-1 or EN 1503-2;
cast iron shall comply with EN 1503-3; and
copper alloys shall comply with prEN 1503-4.
5.2.3 Stainless steel for components shall contain not less than 17 % chromium, and not less than 7 % nickel.
Springs shall be manufactured from stainless steel in accordance with EN 10270-3 or a material with an equivalent
resistance to corrosion.
5.2.4 Components made from hot stamped brass shall be non-porous and suitable for machining or other
processing.
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SIST EN 13799:2003
EN 13799:2002 (E)
Sandcast brass shall not be used.
Leaded brass shall be CW614N or CW617N in accordance with EN 12420 and EN 12164.
Cold drawn brass rods up to 45 mm wide in cross section may be used after heat treatment and adequate testing
for internal cracking. Cold drawn brass rods greater than 45 mm wide in cross-section shall not be used.
Components produced from stamping brass shall not exhibit cold shuts also known as folds, or surface defects.
Components manufactured from hot stamped brass or contents gauge bodies made of drawn brass or machined
from brass rod shall be capable of withstanding, without cracking, the stress-cracking test.
5.2.5 Spheroidal graphite cast iron in accordance with EN 1563, with an elongation at fracture of more than
18 %, may be used. Other ductile irons or cast irons shall not be used.
5.2.6 ZnAl4 and ZnAl4Cu1 shall be in accordance with ISO 301.
5.2.7 Castings shall be free from inclusions and surface defects which could adversely affect the strength, leak
tightness or performance of the contents gauge.
5.3 Non-metallic components
All non-metallic materials in contact with LPG shall be compatible with LPG and shall not distort, harden or adhere
to the body or seat face to such an extent that they impair the function of the gauge and shall also comply with the
appropriate requirements of EN 549.
All elastomeric materials in contact with LPG shall meet the specific requirements of EN 549 for resistance to the
following:
gas (pentane test);
lubricants;
ageing;
low temperature;
high temperature;
compression;
ozone (where gasket/seal is exposed to atmosphere).
5.4 Lubricants, sealants and adhesives
Where used on threads and seals; lubricants, sealants, and adhesives shall be compatible with LPG and not
interfere with the operation of the contents gauge.
6 Design – General requirements
6.1 General
6.1.1 Moving parts shall have sufficient clearance to ensure freedom of movement under all normal conditions of
service. Means of guidance shall be provided to ensure correct seating/sealing.
6.1.2 All components necessary for the correct function of the device shall be secured to prevent unintentional
disassembly during normal operation.
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SIST EN 13799:2003
EN 13799:2002 (E)
6.1.3 The design of contents gauges shall be such that they will not be damaged or leak due to normal transport
operations, e.g. as a result of vibration or acceleration.
6.1.4 The design of contents gauges shall take account of the possible consequences of the use of dissimilar
materials including electrochemical corrosion and material expansion.
6.1.5 Electrical equipment, when an integral part of the contents gauge shall be either explosion proof or
intrinsically safe, and shall meet the appropriate requirements of EN 50014, and of EN 50015, EN 50016,
EN 50017, EN 50018, EN 50019, EN 50020, or EN 50028.
6.1.6 Contents gauges shall include all of the components necessary for their normal function and installation on
the tank.
6.2 Seals
Seals shall be attached or otherwise assembled such that they will not become dislocated under service conditions.
Dynamic seals shall not be secured solely by the application of adhesive.
6.3 Springs
Springs shall be designed
...
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