Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids

This European Standard specifies requirements for elastomeric materials used in seals for supply pipes and fittings, ancillaries and valves at operating temperatures in general from - 5 °C up to 50 °C and in special cases from - 15 °C up to 50 °C, for the following:
General applications (see Table 4, type G)
a)    gaseous fuel (manufactured, natural and liquefied petroleum gas [LPG] in gaseous phase);
b)    hydrocarbon fluids with aromatic content up to 30 % (V/V), including LPG in liquid phase.
Special applications (see Table 4, type H)
Materials suitable for carrying gaseous fuels containing gas condensates and hydrocarbon fluids of unrestricted aromatic content.
General requirements for finished joint seals are also given; any additional requirements called for by the particular application are specified in the relevant product standards taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry and pipe joint design. This European Standard should be used where appropriate with product standards which specify performance requirements for joints.
This European Standard is applicable to joint seals for all pipeline materials including iron, steel, copper and plastics.
In the case of composite seals requirements in 4.2.8 and 4.2.9 apply only when the materials used for any elastomeric parts come into contact with gaseous fuel or hydrocarbon fluid.
Elongation at break, tensile strength, compression set and stress relaxation requirements for materials of hardness categories 80 and 90 apply only when they constitute that part of the seal which participates directly in the sealing function or in long term stability.
This standard is not applicable to the following:
a)    seals made from cellular materials;
b)    seals with enclosed voids as part of their design;
c)    seals with requirements of resistance to flame or to thermal stress;
d)    seals which contain splices joining pre-vulcanised profile ends.

Elastomer-Dichtungen - Werkstoff-Anforderungen für Dichtungen in Versorgungsleitungen und Bauteilen für Gas und flüssige Kohlenwasserstoffe

Diese Norm spezifiziert die Anforderungen an die Elastomer-Werkstoffe, die in Dichtungen für Versorgungsleitungen und Bauteile für im allgemeinen bei Betriebstemperaturen von -5 °C bis zu 50 °C und in speziellen Fällen von -5 °C bis zu 50 °C verwendet werden wie folgt:
Allgemeine Anwendungen (siehe Tabelle 4, Typ G)
a)   gasförmige Brennstoffe (hergestelltes Gas, Erdgas oder Flüssiggas
   in der gasförmigen Phase),
b)   flüssige Kohlenwasserstoffe mit einem Gehalt an aromatischen
   Kohlenwasserstoffen von bis zu 30 % (V/V) oder Flüssiggas in der
   flüssigen Phase
Besondere Anwendungen (siehe Tabelle 4, Typ H)
Materialien zur Förderung von gasförmigen Brennstoffen, die Gaskondensate
enthalten, und flüssige Kohlenwasserstoffe mit unbegrenztem Aromatengehalt.
Allgemeine Anforderungen an die fertigen Dichtungen werden ebenfalls angegeben. Irgendwelche zusätzlichen Anforderungen, die aufgrund besonderer Anforderungen erforderlich sind, werden in den entsprechenden Produktnormen festgelegt, wobei zu berücksichtigen ist, dass die Funktion von Rohrverbindungen von den Werkstoffeigenschaften der Dichtung, der Geometrie der Dichtung und der Konstruktion der Rohrverbindung abhängt. Diese Norm sollte, wenn geeignet, in Verbindung mit Produktnormen, die die Leistungsanforderungen für Dichtungen spezifizieren, benutzt werden.
Diese Norm ist anwendbar für Dichtungen für alle Rohrleitungs-Werkstoffe einschließlich Eisen, Stahl, Kupfer und Kunststoffen.
Im Fall von zusammengesetzten Dichtungen sind die Anforderungen von 4.2.8 und 4.2.9, nur für diejenigen Elastomer-Teile zu erfüllen, die mit Brenngas oder flüssigen Kohlenwas¬serstoffen in Kontakt kommen.
Für Werkstoffe der Härteklassen 80 und 90 gelten die Anforderungen an den Druckverformungsrest, Reißdehnung, Zugfestigkeit und Spannungsrelaxation nur, wenn dieser Teil der Dichtung direkt an der Dichtfunktion oder der Langzeithaltbarkeit beteiligt ist.

Garnitures d'étanchéité en caoutchouc - Spécification des matériaux pour garnitures d'étanchéité de joints de canalisatisations et des raccords véhiculant du gaz et des fluides hydrocarbures

La présente Norme européenne a pour objet de fixer les exigences relatives aux matériaux élastomeres utilisés dans les garnitures d'étanchéité pour canalisations, raccords, vannes et accessoires, a des températures de service comprises en général entre   5 °C et 50 °C et, dans les cas particuliers, entre - 15 °C et 50 °C, pour les applications suivantes :
Applications générales (voir Tableau 4, type G) :
a)   les combustibles gazeux (gaz manufacturé, gaz naturel et gaz de pétrole liquéfié (GPL) en phase gazeuse) ;
b)   les hydrocarbures liquides ayant une teneur en aromatiques inférieure ou égale a 30 % (V/V) y compris les GPL en phase liquide.
Applications spéciales (voir Tableau 4, type H) :Matériaux applicables au transport de combustibles gazeux contenant des condensats gazeux et d'hydrocarbures liquides ayant une teneur en aromatique non limitée.Des exigences générales relatives aux garnitures d'étanchéité vulcanisées sont également indiquées ; Des exigences supplémentaires imposées par une application particuliere sont spécifiées dans les normes de produit correspondantes, en tenant compte du fait que la performance des joints des canalisations dépend des propriétés des matériaux de la garniture d'étanchéité, de la géométrie de cette garniture d'étanchéité et de la conception du joint. Il convient d'utiliser la présente Norme européenne quand elle est applicable, avec les normes de produits spécifiant les exigences de performance des joints.La présente Norme européenne est applicable aux garnitures d'étanchéité de joints de canalisations en tous matériaux, et notamment, la fonte, l'acier, le cuivre et les plastiques.Dans le cas de bagues d'étanchéité composites, les exigences données en 4.2.8 et 4.2.9 s'appliquent uniquement aux parties des matériaux entrant en contact avec des combustibles gazeux ou des hydrocarbures liquides.Dans le cas de matériaux de classes de dureté 80 et 90, les exigences d'allongement a la rupture, de résistance a la traction, de défor

Elastomerna tesnila – Zahteve za materiale za tesnila za pipe in napeljavo za plin in vodikoogljikove tekočine

General Information

Status
Published
Publication Date
30-Nov-2002
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2002
Due Date
01-Dec-2002
Completion Date
01-Dec-2002

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Elastomer-Dichtungen - Werkstoff-Anforderungen für Dichtungen in Versorgungsleitungen und Bauteilen für Gas und flüssige KohlenwasserstoffeGarnitures d'étanchéité en caoutchouc - Spécification des matériaux pour garnitures d'étanchéité de joints de canalisatisations et des raccords véhiculant du gaz et des fluides hydrocarburesElastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids91.140.40Sistemi za oskrbo s plinomGas supply systems83.140.50TesnilaSealsICS:Ta slovenski standard je istoveten z:EN 682:2002SIST EN 682:2002en01-december-2002SIST EN 682:2002SLOVENSKI

STANDARD
SIST EN 682:2002

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 682February 2002ICS 83.140.50English versionElastomeric Seals - Materials requirements for seals used inpipes and fittings carrying gas and hydrocarbon fluidsGarnitures d'étanchéité en caoutchouc - Spécification desmatériaux pour garnitures d'étanchéité pour joints decanalisations et des raccords véhiculant du gaz et desfluides hydrocarburesElastomer-Dichtungen - Werkstoff-Anforderungen fürDichtungen in Versorgungsleitungen und Bauteilen für Gasund flüssige KohlenwasserstoffeThis European Standard was approved by CEN on 16 November 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 682:2002 ESIST EN 682:2002

EN 682:2002 (E)2ContentspageForeword.................................................................................................................................................31Scope.........................................................................................................................................42Normative references...............................................................................................................53Classification.............................................................................................................................64Requirements............................................................................................................................64.1Materials....................................................................................................................................64.2Finished seal requirements.....................................................................................................64.2.1Dimensional tolerances...........................................................................................................64.2.2Imperfections and defects.......................................................................................................64.2.3Hardness....................................................................................................................................74.2.4Tensile strength and elongation at break..............................................................................74.2.5Compression set in air.............................................................................................................74.2.6Accelerated ageing in air.........................................................................................................74.2.7Stress relaxation in compression...........................................................................................74.2.8Volume change in liquid B.......................................................................................................84.2.9Volume change in oil................................................................................................................84.2.10Ozone resistance......................................................................................................................84.2.11Compression set at - 15 °C......................................................................................................85Test pieces and temperature.................................................................................................105.1Preparation of test pieces......................................................................................................105.2Test temperature.....................................................................................................................106Factory production control....................................................................................................117Factory product control tests................................................................................................117.1Sampling..................................................................................................................................117.2Routine tests...........................................................................................................................117.3Type tests................................................................................................................................118Storage.....................................................................................................................................119Designation.............................................................................................................................1210Marking and labelling.............................................................................................................12Annex A

(informative)

Guidance on storage of seals.....................................................................13Annex ZA

(informative)

Clauses of this European Standard addressing the provisions of theEU Construction Products Directive..................................................................................................14Bibliography.........................................................................................................................................18SIST EN 682:2002

EN 682:2002 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 208 “Elastomeric seals forjoints in pipework and pipelines”, the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of anidentical text or by endorsement, at the latest by August 2002, and conflicting national standards shall bewithdrawn at the latest by November 2003.No existing European Standard is superseded.This European Standard has been prepared under a mandate given to CEN by the EuropeanCommission and the European Free Trade Association, and supports essential requirements of EUDirective(s).For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard.This European Standard is based on ISO 6447 and ISO 6448, bringing together the requirements forseals used in gas and hydrocarbon fluid applications. The major changes from ISO 6447 and ISO 6448have been to introduce additional test requirements e.g. an ozone test and to modify some requirements.Finished joint seals have been classified according to their final application and operating temperatures.According to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing 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.SIST EN 682:2002

EN 682:2002 (E)41 ScopeThis European Standard specifies requirements for elastomeric materials used in seals for supply pipesand fittings, ancillaries and valves at operating temperatures in general from - 5 °C up to 50 °C and inspecial cases from - 15 °C up to 50 °C, for the following:General applications (see Table 4, type G)a) gaseous fuel (manufactured, natural and liquefied petroleum gas [LPG] in gaseous phase);b) hydrocarbon fluids with aromatic content up to 30 % (V/V), including LPG in liquid phase.Special applications (see Table 4, type H)Materials suitable for carrying gaseous fuels containing gas condensates and hydrocarbon fluids ofunrestricted aromatic content.General requirements for finished joint seals are also given; any additional requirements called for by theparticular application are specified in the relevant product standards taking into account that theperformance of pipe joints is a function of the seal material properties, seal geometry and pipe jointdesign. This European Standard should be used where appropriate with product standards which specifyperformance requirements for joints.This European Standard is applicable to joint seals for all pipeline materials including iron, steel, copperand plastics.In the case of composite seals requirements in 4.2.8 and 4.2.9 apply only when the materials used forany elastomeric parts come into contact with gaseous fuel or hydrocarbon fluid.Elongation at break, tensile strength, compression set and stress relaxation requirements for materials ofhardness categories 80 and 90 apply only when they constitute that part of the seal which participatesdirectly in the sealing function or in long term stability.This standard is not applicable to the following:a) seals made from cellular materials;b) seals with enclosed voids as part of their design;c) seals with requirements of resistance to flame or to thermal stress;d) seals which contain splices joining pre-vulcanized profile ends.SIST EN 682:2002

EN 682:2002 (E)52 Normative referencesThis 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 listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this European Standard only when incorporated in it by amendment or revision. For undatedreferences the latest edition of the publication referred to applies (including amendments).ISO 37, Rubber, vulcanized or thermoplastic – Determination of tensile stress – strain properties.ISO 48, Rubber, vulcanized or thermoplastic – Determination of hardness (hardness between 10 IRHDand 100 IRHD).ISO 188:1998, Rubber, vulcanized or thermoplastic – Accelerated ageing and heat resistance tests.ISO 471, Rubber – Temperatures, humidities and times for conditioning and testing.ISO 815, Rubber, vulcanized or thermoplastic – Determination of compression set at ambient, elevated orlow temperatures.ISO 1431–1, Rubber, vulcanized or thermoplastic – Resistance to ozone cracking – Part 1: static straintest.ISO 1817, Rubber, vulcanized – Determination of the effect of liquids.ISO 2859–1, Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed byacceptance quality limit (AQL) for lot-by-lot inspection.ISO 3302–1, Rubber – Tolerances for products – Part 1: Dimensional tolerances.ISO 3384:1999, Rubber, vulcanized or thermoplastic – Determination of stress relaxation in compressionat ambient and at elevated temperatures.ISO 3951, Sampling procedures and charts for inspection by variables for percent nonconforming.ISO 4661–1, Rubber, vulcanized or thermoplastic – Preparation of samples and test pieces – Part 1:Physical tests.ISO 9691:1992, Rubber – Recommendations for the workmanship of pipe joint rings – Description andclassification of imperfections.SIST EN 682:2002

EN 682:2002 (E)63 ClassificationFive categories of material for seals are specified in Tables 2 and 3.A nominal hardness shall be specified within the ranges in Table 1.Table 1 - Hardness categoriesHardness category5060708090Range of hardness, IRHD46 - 5556 -6566 - 7576 - 8586 - 954 Requirements4.1 MaterialsThe materials shall be free of any substances which can have a deleterious effect on the life of the seals,or on the pipe and fittings.4.2 Finished seal requirements4.2.1 Dimensional tolerancesTolerances shall be specified from the appropriate categories in ISO 3302-1.4.2.2 Imperfections and defectsThe seals shall be free of defects or irregularities which could affect their function. Classification ofimperfections shall be according to ISO 9691:1992 as follows:- surface imperfections in zones involved in the sealing function as described in 4.1.1 of ISO9691:1992 shall be considered as defects;- surface imperfections in zones not involved in the sealing function as described in 4.1.2.1 b) ofISO 9691:1992 shall not be considered as defects.NOTE 1Major surface imperfections in zones not involved in the sealing function as described in 4.1.2.1 a) of ISO9691:1992 can be considered as defects. This should be agreed between the interested parties; the acceptancecriteria depends upon the seals’ type or design respectively.NOTE 2Internal imperfections as described in 4.2 of ISO 9691: 1992 can be considered as defects. Thecompressive force can be determined according to ISO 7743. The acceptable limiting values of the compressiveforce should be agreed between the interested parties; they depend upon the seals’ type or design respectively.SIST EN 682:2002

EN 682:2002 (E)74.2.3 HardnessWhen determined by the micro-test method specified in ISO 48, the hardness shall conform to therequirements given in Tables 2 or 3.NOTEIf the dimensions of a seal are appropriate, the normal test method specified in ISO 48 can be used,provided that the micro-test method is used for reference purposes.For the same seal, the difference between the minimum and maximum hardness values shall not bemore than 4 IRHD. Each value shall be within the specified tolerances.4.2.4 Tensile strength and elongation at breakTensile strength and elongation at break shall be determined by the method specified in ISO 37.Dumbbell shaped test pieces of types 1, 2, 3 or 4 shall be used. Type 2 is the preferred type. The testreport shall state the dumb-bell type whenever type 2 is not used.The tensile strength and the elongation at break shall conform to the requirements given in Tables 2 or 3.4.2.5 Compression set in air4.2.5.1 GeneralIf the test piece is taken from a seal, then the measurement shall be carried out as far as possible in thedirection of compression of the seal in service.1.1.1.2 Compression set at 23 °C and 70 °CWhen determined by the method specified in ISO 815, at 23 °C and 70 °C using the small type B testpiece, the compression set shall conform to the requirements given in Tables 2 or 3.4.2.5.3

Low temperature compression set at 5 °CWhen determined by the method specified in ISO 815 using the small type B test piece and a recoverytime of (30 ± 3) min, the compression set after 72 h at -5 °C, when measured at -5 °C, shall conform tothe requirements given in Tables 2 or 3.4.2.6 Accelerated ageing in airTest pieces prepared for the determination of hardness (see 4.2.3) and for the determination of tensilestrength and elongation at break (see 4.2.4) shall be aged in air at 70 °C for 7 days by the normal ovenmethod specified in ISO 188:1998 (Method A).The changes in hardness, tensile strength and elongation at break shall conform to the requirementsgiven in Tables 2 or 3.4.2.7 Stress relaxation in compressionThe stress relaxation shall be determined by Method A of ISO 3384:1999, using a test piece inaccordance with 5.1, after applying mechanical and thermal conditioning. Measurements shall be takenafter 3 h, 1 day, 3 days and 7 days for the 7 days test and after 3 h, 1 day, 3 days, 7 days, 30 days and90 days for the 90 days test. The best fit straight line shall be determined by regression analysis using aSIST EN 682:2002

EN 682:2002 (E)8logarithmic time scale. The 7 days and 90 days requirements in Tables 2 and 3 are those derived fromthese straight lines.The stress relaxation in compression shall conform to the requirements given in Tables 2 or 3.For continuous measurements using an apparatus described in paragraph one of 5.2 of ISO 3384:1999,the 7 days and 90 days requirements in Tables 2 and 3 are those derived from the measurement at 7days and 90 days.The test temperature shall be maintained within the specified tolerance during the whole period of the testand verified by suitabl

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