SIST EN 13799:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssiggas-Geräte und -Ausrüstungsteile - Füllstandsanzeiger für Behälter für Flüssiggas (LPG)Équipements et accessoires GPL - Jauges de niveau pour les réservoirs de GPLPG equipment and accessories - Contents gauges for Liquefied Petroleum Gas (LPG) tanks23.020.10UH]HUYRDUMLStationary containers and tanksICS:Ta slovenski standard je istoveten z:EN 13799:2012SIST EN 13799:2012en,fr,de01-maj-2012SIST EN 13799:2012SLOVENSKI
STANDARDSIST EN 13799:2003/AC:2007SIST EN 13799:20031DGRPHãþD



SIST EN 13799:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13799
March 2012 ICS 23.020.01 Supersedes EN 13799:2002English Version
LPG equipment and accessories - Contents gauges for Liquefied Petroleum Gas (LPG) pressure vessels
Équipements et accessoires GPL - Jauges de niveau pour les réservoirs de GP
Flüssiggas-Geräte und Ausrüstungsteile - Füllstandsanzeiger für Druckbehälter für Flüssiggas (LPG)This European Standard was approved by CEN on 14 January 2012.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13799:2012: ESIST EN 13799:2012



EN 13799:2012 (E) 2 Contents Page Foreword .4Introduction .51 Scope .62 Normative references .63 Terms and definitions .74 Operating conditions .85 Materials .85.1 General .85.2 Metallic materials .85.3 Non-metallic components .95.4 Lubricants, sealants and adhesives .96 Design – General requirements .96.1 General .96.2 Seals . 106.3 Springs . 106.4 Threads . 106.5 Flanges . 117 Design– Specific requirements . 117.1 Contents gauge . 117.1.1 Float gauge . 117.1.2 Rotary gauge . 117.1.3 Fixed liquid level gauge . 117.1.4 Slip tube gauge . 127.2 Dials for contents gauges . 128 Design testing . 128.1 General . 128.2 Over-torquing deformation test . 138.3 External tightness test . 148.4 Internal tightness test . 148.5 Endurance test . 158.6 Pressure strength test . 158.7 Stress cracking test . 158.7.1 General . 158.7.2 Mercurous nitrate immersion test . 168.7.3 Moist ammonia air stress cracking test . 168.8 Float pressure test . 168.9 Dimensional inspection . 168.10 Function test . 168.11 Vacuum test . 168.12 Float Test . 168.13 Accuracy assessment . 179 Production testing and inspection. 1710 Marking . 1711 Documentation . 17Annex A (normative)
Float gauge flange and gasket dimensions . 19SIST EN 13799:2012



EN 13799:2012 (E) 3 Annex B (normative)
Special low temperature requirements . 22Annex C (normative)
Production testing and inspection . 23Annex D (informative)
Vibration Testing . 24D.1 General . 24D.2 Test samples . 24D.3 Test method . 24D.4 Criteria for passing the test . 25Annex E (informative)
Environment checklist . 26Bibliography . 27 SIST EN 13799:2012



EN 13799:2012 (E) 4 Foreword This document (EN 13799:2012) 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 September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13799:2002. 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. For the purposes of this standard, contents gauges are considered a pressure accessory in accordance with the Pressure Equipment Directive 97/23/EC in that they have a function additional to that of containing pressure. However, as they have a volume less than 0,1 l and a maximum allowable pressure (PS) of 25 bar, they are designed and manufactured in accordance with sound engineering practice of a Member State in order to ensure safe use. This document is considered as a supporting European Standard for the Pressure Equipment Directive 97/23/EC. This document has been submitted for reference into the RID and/or in the technical annexes of the ADR. The major changes to this revision include:  scope extended to include transportable equipment;  gauge graduations and precision included;  overfill Protection Device is deleted, now included in EN 13175;  test requirement is included for non-metallic floats;  torque test values have been changed;  vacuum test and float test have been introduced;  Annex C, production testing has been introduced;  Annex D, vibration testing has been introduced;  Annex E, environmental checklist has been introduced.
According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 13799:2012



EN 13799:2012 (E) 5 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 European 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. SIST EN 13799:2012



EN 13799:2012 (E) 6 1 Scope This European Standard 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 European Standard does not apply to refineries or other process plants. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 549:1994, 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 1092-1:2007, 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 1563:1997, Founding — Spheroidal graphite cast irons EN 10270-3:2001, Steel wire for mechanical springs — Part 3: Stainless spring steel wire EN 12165:2011, Copper and copper alloys — Wrought and unwrought forging stock EN 12420:1999, Copper and copper alloys — Forgings EN 13906-1:2000, 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 casting ISO 1817:2011, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids SIST EN 13799:2012



EN 13799:2012 (E) 7 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 ANSI/ASME B1.20.1 – 1983, Pipe threads, general purpose (inch); issued by American National Standards Institute in 1983 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 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 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 SIST EN 13799:2012



EN 13799:2012 (E) 8 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 4 Operating conditions Contents gauges designed in accordance with this standard shall be suitable for the following conditions:  a minimum operating temperature of -20 °C. In service, temperatures below this can be encountered during short periods, for example, when filling;  for some parts of Europe and certain applications, temperatures lower than -20 °C can be encountered, for these conditions the requirements of Annex B shall be met;  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. The maximum allowable pressure for a contents gauge is 25 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. 5.2 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 1092-1:2007. SIST EN 13799:2012



EN 13799:2012 (E) 9 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 10270-3:2001 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 or CW617N in accordance with EN 12420:1999 and EN 12165:2011. 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 1563:1997 and amendments, with an elongation at fracture of more than 18 %. Other ductile irons or cast irons shall not be used. 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 11114-1:1997. 5.3 Non-metallic components 5.3.1 For guidance on the choice of non-metallic materials, see EN ISO 11114-2:2000. 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.
All rubber materials except floats shall also comply with the requirements of EN 549:1994. The resistance to ozone test in EN 549:1994 shall only be carried out where gaskets/seals are exposed to atmosphere. 5.3.3 The buoyancy of the float shall not be adversely affected by the LPG. Non-metallic floats shall be tested in accordance with 8.12 for resistance to gas and shall meet the following requirements:  change in mass after immersion ± 10 %;  change in mass after drying (510−) %. 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. SIST EN 13799:2012



EN 13799:2012 (E) 10 6.1.2 All components necessary for the correct function of the device shall be secured to prevent unintentional disassembly during normal operation. 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 94/9/EC 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:  minimising the use of materials;  fittings required for the pressure vessel;  minimising 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 13906-1:2000. 6.4 Threads 6.4.1 Taper threaded pressure vessel connections shall comply with ANSI/ASME B1.20.1 - 1983. Thread sizes shall not exceed DN 80 (3 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 - 1983. 6.4.5 To avoid mismatching with ANSI/ASME B1.20.1 - 1983 threads, ISO 7-1:1994 shall not be used. SIST EN 13799:2012



EN 13799:2012 (E) 11 6.5 Flanges Flanges shall comply with Annex A or with EN 1092-1:2007. 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. 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 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. 7.1.1.6 Gauge marking shall read in percentage graduations. The graduations shall not be greater than 5 % and the labelling of the graduations shall not be greater than 10 % spacings. For vessels with a diameter below 600 mm the marking can be shown as E, ¼, ½, ¾ and F with graduations every é volume. 7.1.1.7 The overfill gauge readings shall be highlighted on the gauge. 7.1.1.8 Low contents gauge readings shall also be highlighted in a distinct colour. 7.1.1.9 The overall accuracy of the gauge shall be within ± 3 % throughout all scale readings below 30 % and above 70 % of vessel volume. The overall accuracy of the gauge shall be ± 5 % from 31 % to 69 % of vessel volume. 7.1.2 Rotary gauge 7.1.2.1 The cross-section of the passage way through the gauge body shall at some point be limited to 1,8 mm2. 7.1.2.2 The vent screw shall remain captive, or be permanently attached to the body. 7.1.2.3 The direction of the venting shall be away from the operator’s expected position. 7.1.2.4 The tube shall be of sufficient rigidity not to affect the accuracy of the gauge reading, and be capable of being rotated both clockwise and anticlockwise, through 360°. 7.1.3 Fixed liquid level gauge Fixed liquid level gauges that operate by means of temporarily venting a limited quantity of LPG, whereupon the change from vapour to liquid is detected, shall meet the following requirements: SIST EN 13799:2012



EN 13799:2012 (E) 12  the cross-section of the passage way through the gauge body shall at some point be limited to 1,8 mm2;  the orifice shall be controlled by a vent screw;  the vent screw shall remain captive, or be permanently attached to the gauge body;  the direction of venting shall be away from the operator;  the dip tube, where manufactured as an integral part of the gauge, shall be securely fastened;  the length of the dip tube shall be determined according to the requirements of the operating conditions. 7.1.4 Slip tube gauge 7.1.4.1 The cross-section of the passageway through the gauge body shall at some point be limited to 1,8 mm2. 7.1.4.2 The vent screw shall remain captive, or be permanently attached to the bod
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