SIST EN 13799:2022

SLOVENSKI STANDARD
oSIST prEN 13799:2020
01-maj-2020
Oprema in pribor za utekočinjeni naftni plin (UNP) - Kazalniki nivoja v posodah za
UNP
LPG equipment and accessories - Contents gauges for Liquefied Petroleum Gas (LPG)
pressure vessels
Flüssiggas-Geräte und Ausrüstungsteile - Füllstandsanzeiger für Druckbehälter für
Flüssiggas (LPG)
Équipements et accessoires GPL - Jauges de niveau pour les réservoirs de gaz de
pétrole liquéfié (GPL)
Ta slovenski standard je istoveten z: prEN 13799
ICS:
23.020.10 Nepremične posode in Stationary containers and
rezervoarji tanks
oSIST prEN 13799:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13799:2020

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oSIST prEN 13799:2020


DRAFT
EUROPEAN STANDARD
prEN 13799
NORME EUROPÉENNE

EUROPÄISCHE NORM

May 2020
ICS 23.020.01 Will supersede EN 13799:2012
English Version

LPG equipment and accessories - Contents gauges for
Liquefied Petroleum Gas (LPG) pressure vessels
Equipements pour GPL et leurs accessoires - Jauges de Füllstandsanzeiger für Druckbehälter für Flüssiggas
niveau pour les réservoirs de gaz de pétrole liquéfié (LPG) - Füllstandsanzeiger für Flüssiggasbehälter
(GPL)
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-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, 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13799:2020 E
worldwide for CEN national Members.

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Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Operating conditions . 8
5 Materials . 9
5.1 General . 9
5.2 Metallic materials . 9
5.3 Non-metallic components . 10
5.4 Lubricants, sealants and adhesives . 10
6 Design – General requirements . 10
6.1 General . 10
6.2 Seals . 11
6.3 Springs . 11
6.4 Threads . 11
6.5 Flanges . 12
7 Design– Specific requirements . 12
7.1 Contents gauge . 12
7.2 Dials for contents gauges . 13
7.3 Telemetry . 14
8 Design type testing . 15
8.1 General . 15
8.2 Over-torquing deformation test . 17
8.3 External tightness test . 18
8.4 Internal tightness test . 19
8.5 Accuracy test . 19
8.6 Endurance test . 20
8.7 Gauge repeatability . 20
8.8 Pressure strength test . 20
8.9 Stress cracking test . 21
8.10 Float pressure test . 21
8.11 Dimensional inspection . 21
8.12 Function test . 21
8.13 Vacuum test . 22
8.14 Float test . 22
8.15 Dial or insert pressure test . 23
9 Production testing and inspection . 23
10 Marking . 23
11 Documentation . 24
Annex A (normative) Float gauge flange and gasket dimensions . 25
Annex B (normative) Special low temperature requirements . 28
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Annex C (normative) Production testing and inspection . 29
Annex D (informative) Vibration Testing . 30
D.1 General . 30
D.2 Test samples . 30
D.3 Test method . 30
D.4 Criteria for passing the test . 31
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive 2014/68/EU aimed to be covered . 32
Bibliography . 34

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European foreword
This document (prEN 13799:2020) has been prepared by Technical Committee CEN/TC 286 “LPG
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 13799:2012.
The major changes to this revision include:
— revision to operational conditions;
— introduction of requirements for rubber material;
— introduction of telemetry requirements;
— introduction of an accuracy test;
— introduction of gauge repeatability requirements.
This document has been submitted for reference in
— the RID and
— the technical annexes of the ADR
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 may lead to temporary non-compliances with the clauses of
this standard.
This document has been prepared under a standardization request 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.
For the purposes of this standard, contents gauges are considered a pressure accessory in accordance
with the Pressure Equipment Directive 2014/68/EU [1] in that they have a function additional to that of
containing pressure.
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Introduction
Protection of the environment is a key political issue in Europe and around the world. It is described
here in its broadest sense. However, the total life cycle aspects of a product on the environment for
example is what is meant. This includes expenditure of energy during all phases: mining of raw
materials, fabrication, packaging, distribution, use, scrapping, recycling of materials, etc.
NOTE Annex E indicates which clauses in this document 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.
Protection of the environment is a key political issue in Europe and elsewhere. For TC 286 this is
covered in CEN/TS 16765 [4] LPG equipment and accessories - Environmental considerations for
CEN/TC 286 standards, and this Technical Specification should be read in conjunction with this
standard.
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1 Scope
This document specifies minimum requirements for design and testing of contents gauges, which are
directly connected to LPG transportable pressure vessels, LPG drums, LPG cylinders and static LPG
pressure vessels above 0,5 l water capacity excluding those used for automotive containers.
This document includes minimum requirements for the safe interchangeability of telemetry equipment,
which is either integral in or additional to the contents gauge.
This document does not apply to refineries or other process plants.
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.
EN 549:2019, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 751-1:1996, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family
gases and hot water - Part 1: Anaerobic jointing compounds
EN 751-2:1996, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family
gases and hot water - Part 2: Non-hardening jointing compounds
EN 751-3:1996, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family
gases and hot water - Part 3: Unsintered PTFE tapes
EN 1092-1:2018, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1503-1:2000, Valves — Materials for bodies, bonnets and covers — Part 1: Steels specified in European
Standards
EN 1503-2:2000, Valves — Materials for bodies, bonnets and covers — Part 2: Steels other than those
specified in European Standards
EN 1503-3:2000, Valves — Materials for bodies, bonnets and covers — Part 3: Cast irons specified in
European Standards
EN 1503-4:2002, Valves — Materials for bodies, bonnets and covers — Part 4: Copper alloys specified in
European Standards
EN 1563:2018, Founding — Spheroidal graphite cast irons
EN 10270-3:2011, Steel wire for mechanical springs — Part 3: Stainless spring steel wire
EN 12164, Copper and copper alloys - Rod for free machining purposes
EN 12165, Copper and copper alloys - Wrought and unwrought forging stock
EN 12420, Copper and copper alloys - Forgings
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EN 13906-1:2013, Cylindrical helical springs made from round wire and bar — Calculation and design —
Part 1: Compression springs
EN 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements
ISO 301:2006, Zinc alloy ingots intended for castings
ISO 1817:2015, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 6957:1988, Copper alloys — Ammonia test for stress corrosion resistance
ISO 7049, Cross-recessed pan head tapping screws
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
Liquefied Petroleum Gas
LPG
low pressure gas composed of one or more light hydrocarbons which are assigned to UN 1011,
UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane,
butane isomers, butene with traces of other hydrocarbon gases
3.2
contents gauge
device to indicate the liquid level or contents in a pressure vessel
3.2.1
float gauge
device to indicate the content of a vessel by means of a float on the liquid surface within the vessel
3.2.2
rotary gauge
device which operates through a rotating action in order to assess the liquid level in a vessel by means
of temporarily venting a limited amount of LPG, whereupon the change from liquid to vapour is
detected
3.2.3
fixed liquid level gauge
control device, such as a dip tube in combination with a vent valve to indicate when a predetermined
liquid level has been reached or surpassed
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3.2.4
slip tube
device which operates through a linear action in order to assess the liquid level in a pressure vessel by
means of temporarily venting a limited amount of LPG, where upon the change from liquid to vapour is
detected
3.3
external tightness
resistance to leakage through the fitting to or from the atmosphere
3.4
internal tightness
resistance to leakage to atmosphere across the valve seat or any other pressure containing component
when the valve is closed
3.5
maximum allowable pressure
maximum pressure for which the equipment is designed
3.6
nominal diameter DN
numerical designation of size, in millimetres, which is common to all components in a piping system
other than components designated by outside diameters or by thread size
Note 1 to entry: It is a convenient round number for reference purposes and is only loosely related to
manufacturing dimensions. The nominal size is designated by DN followed by a number.
3.7
pressure vessel
assembly of the pressure-retaining envelope (including the openings and their closures) and non-
pressure-retaining parts attached directly to it
3.8
type test
test or series of tests conducted to prove that the design meets the requirements of this document
4 Operating conditions
Contents gauges designed in accordance with this document shall be suitable for the following
conditions:
— a minimum operating temperature of −20 °C.;
— a minimum operating temperature of −40 °C for those parts of Europe where contents gauges are
subject to more severe temperature conditions. The material and design shall be shown to be
satisfactory for operations under these conditions and shall meet the requirements of Annex B.;
— the maximum operating temperature is 65 °C;
— the minimum pressure to which a gauge is normally exposed is 0 bar gauge. Vacuum conditions on
the gauge, arising from butane at low temperature or evacuation of the pressure vessel can expose
the device to a vacuum of 0,05 bar absolute.
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The maximum allowable pressure for a contents gauge shall be 30 bar.
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 to be used.
5.1.2 Materials for gauge components shall be selected to give adequate strength in service. Materials
selected shall adequately protect against other modes of failure such as atmospheric corrosion, brass
dezincification, stress corrosion or other 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.
5.1.4 Optional equipment directly connected to the gauge shall not affect the integrity of the gauge
and its function. Dials/inserts shall be sealed to prevent water ingress into the dial/insert. The contents
gauge shall be designed to ensure that water ingress between the dial/insert and gauge body is avoided
or does not interfere with the gauge operation if it freezes.
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 1503-1:2000 or EN 1503-2:2000, cast iron shall comply with EN 1503-3:2000 and copper alloys
shall comply with EN 1503-4:2002.
5.2.3 Materials for steel flanges shall be in accordance with EN 1092-1:2018.
5.2.4 Stainless steel for components shall contain not less than 16 % chromium, and not less than 7 %
nickel.
5.2.5 Springs shall be manufactured from stainless steel in accordance with EN 10270-3:2011 or a
material with an adequate resistance to corrosion.
5.2.6 Hot stamped brass shall be non-porous and suitable for machining or other processing. Leaded
brass shall be CW614N in accordance with EN 12164 or CW617N in accordance with EN 12420 and
EN 12165. Sand-cast brass shall not be used. Cold drawn brass rods shall only be used for machining
after adequate testing for internal cracking, porosity or other inclusions and shall be heat treated if
required. Components produced from stamping brass shall not exhibit cold shuts also known as folds,
or surface defects.
5.2.7 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.
5.2.8 Spheroidal graphite cast iron shall comply with EN 1563:2018 and amendments, with an
elongation at fracture of more than 18 %. Other ductile irons or cast irons shall not be used.
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5.2.9 ZnAl4 and ZnAl4Cu1 shall be in accordance with ISO 301:2006.
5.2.10 Castings shall be free from inclusions and surface defects which could adversely affect the
strength, leak tightness or performance of the contents gauge.
5.2.11 For guidance on the choice of metallic materials, see EN ISO 11114-1:2012
5.3 Non-metallic components
5.3.1 For guidance on the choice of non-metallic materials, see EN ISO 11114-2:2013
5.3.2 Except for floats, all non-metallic materials in contact with LPG shall not distort, harden or
adhere to the body or seat face to such an extent as to impair the function of the gauge.
5.3.3 Rubber materials, with the exception of floats, in contact with LPG, for temperatures of – 20C
(−40C for low temperature applications) to + 65C, shall meet the requirements of EN 549 for resistance
to:
a) gas (n-pentane test);
b) lubricants;
c) ageing;
d) compression;
e) ozone (where the material is exposed to the atmosphere);
f) condensate/liquid phase of combustible gases (liquid B test)
5.3.4 The buoyancy of the float shall not be adversely affected by the LPG. Non-metallic floats shall be
tested in accordance with 8.14 for resistance to gas and shall meet the following requirements:
— change in mass after immersion ± 10 %;
5
— change in mass after drying ( ) %.
−10
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. Sealants shall comply with EN 751-1:1996,
EN 751-2:1996 or EN 751-3:1996.
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 operation.
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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6.1.3 Contents gauges shall be designed to ensure external and internal leak tightness, and their
function shall not be affected, as a result of vibration during transportation.
6.1.4 The design shall take account of the use of dissimilar materials, e.g. electrochemical corrosion or
material expansion.
6.1.5 Electrical equipment, when an integral part of the contents gauge, is required to be ATEX
compliant in accordance with directive 2014/34/EU and shall be either explosion proof or intrinsically
safe, and shall meet the requirements of EN 60079-0 where appropriate.
6.1.6 Contents gauges shall include all of the components necessary for their normal function and
installation on the pressure vessel.
6.1.7 Possible stress corrosion shall be eliminated by either design or heat treatment.
6.1.8 The design of the contents gauge should take account of the following:
— minimizing the use of materials;
— fittings required for the pressure vessel;
— minimizing the environmental impact of in service maintenance and end of life disposal;
— efficient transport of finished product; and
— any packaging and protection used during storage/transport of the finished product should be
selected to have the minimum environmental impact, i.e. use of recyclable or bio-degradable
materials, minimum use of energy.
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 in accordance with EN 13906-1:2013.
6.4 Threads
6.4.1 Taper threaded pressure vessel connections shall comply with ANSI/ASME B1.20.1 - 2013.
Thread sizes shall not exceed DN 50 (2 inches).
6.4.2 Where taper threads are used, the design shall ensure that over-torquing shall not impede the
correct operation of the contents gauge, see 8.2.
6.4.3 Taper threaded sections of a body designed for a pressure vessel connection shall be
constructed with wrenching flats.
6.4.4 All threads other than taper threaded pressure vessel connections shall be in accordance with a
European Standard (EN) or an International Standard (ISO), or shall be in accordance with
ANSI/ASME B1.20.1 - 2013.
6.4.5 To avoid mismatching with ANSI/ASME B1.20.1 - 2013 threads, ISO 7-1:1994 shall not be used.
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6.5 Flanges
Flanges shall comply with Annex A or with EN 1092-1:2018.
7 Design– Specific requirements
7.1 Contents gauge
7.1.1 Float gauge
7.1.1.1 The dial assembly, where applicable, shall be replaceable and the configuration of the gauge
shall only permit the correct orientation of the dial assembly, see 7.3.3 for interchangeability.
7.1.1.2 Stainless Steel socket head mounting screws shall be used with type 1 or type 2 float gauges
(see Annex A). Studs or stainless steel socket head mounting screws shall be used with type 3 or type 4
float gauges. The appropriate sealing gasket for the intended service condition shall be provided.
7.1.1.3 A hollow float or the material for a solid float shall retain buoyancy and shall withstand the
normally expected variation in service conditions such as permanent immersion in liquid/vapour LPG
and changes in relative density of the liquid.
7.1.1.4 Means shall be provided for the float gauge mechanism to operate correctly and
continuously over the full operating range. The operating mechanism shall be such that it cannot be
damaged during the filling of the pressure vessel.
7.1.1.5 The dial or insert shall be assembled to ensure that the internal atmosphere is clean dry air
that does not allow moisture to condense at any temperature between – 40°C and + 65°C.
7.1.1.6 In case of magnetic transmission, the float magnet and the dial magnet shall be such as to
transmit reliably, in all normal operating conditions, the level of liquid during the expected life of the
gauge.
7.1.1.7 Gauge ma
...