1、BRITISH STANDARDBS EN ISO 4126-2:2003Incorporating corrigendaSeptember 2004,July 2006 andJuly 2009Safety devices for protection against excessive pressure Part 2: Bursting disc safety devicesICS 13.240BS EN ISO 4126-2:2003This British Standard was published under the authority of the Standards Polic
2、y and Strategy Committee on 10 February 2003 BSI 2009ISBN 978 0 580 67726 7National forewordThis British Standard is the UK implementation of EN ISO 4126-2:2003,incorporating corrigenda September 2004 and July 2006. It is identical with ISO 4126-2:2003. It supersedes BS 2915:1990, which is withdrawn
3、. The UK participation in its preparation was entrusted to Technical Committee PVE/12, Safety devices.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are r
4、esponsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationAmd. No. Date Comments15405Corrigendum No. 14 November 2004 Revision to Annex ZA page16820Corrigendum No. 229 December 2006 Repl9 Supe
5、rsession details updated in National forewordacement of Annex ZA31 July 200EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 4126-2January 2003ICS 13.240 Incorporating coEnglish versionSafety devices for protection against excessive pressure - Part2: Bursting disc safety devices (ISO 4126-2:2003
6、)Dispositifs de scurit pour la protection contre lespressions excessives - Partie 2: Dispositifs de sret disque de rupture (ISO 4126-2:2003)Sicherheitseinrichtungen gegen unzulssigen berdruck -Teil 2: Berstscheibeneinrichtungen (ISO 4126-2:2003)This European Standard was approved by CEN on 9 Septemb
7、er 2002.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 obtaine
8、d 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 h
9、as the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedK
10、ingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 4126-2:2003 Erri
11、genda September 2004 and July 20062ContentspageForeword4Introduction.51Scope52Normative references53Terms and definitions74Materials94.1 Selection of materials94.2 Material specifications104.3 Protection from corrosion.105Types of bursting discs.105.1 Conventional domed bursting discs (forward actin
12、g).105.2 Reverse domed bursting discs (reverse acting).115.3 Flat bursting discs.115.4 Other types and designs.136Bursting disc holders136.1 Design.136.2 Types.136.3 Connections.157Back pressure supports167.1 General167.2 Opening back pressure supports.167.3 Non-opening back pressuresupports.168Temp
13、erature shields169Stiffening rings.1610 Gaskets/seals.1611 Assembly of bursting disc safety devices1611.1General1611.2Bursting disc safety devices with replaceable bursting disc assemblies.1711.3Bursting disc safety devices with non-replaceable bursting disc assemblies.1712 Specified bursting pressu
14、re requirements.1713 Inspection by the manufacturer.1914 Test procedures.1914.1 General1914.2 Pressure testing.1914.3 Burst testing.1914.4 Leak testing2114.5 Non-destructive examination2115 Certification2116 Product designation2217 Marking.2217.1 General2217.2Bursting discs/bursting disc assemblies2
15、3317.3 Bursting disc holders2317.4 Bursting disc safety devices with non-replaceable bursting disc assemblies.2417.5 Ancillary components.2417.6 Omission of markings.2418 Preparation for storage and transportation2518.1 General2518.2 Marking of packages.2518.3 Provision of assembly and installation
16、instructions.2518.4 Provision of documents, loose identification plates etc.25Annex A (normative) Materials.26Annex B (informative) Materials28AnnexZA (informative) Relationship between this European Standard and the Essential Requirementso f EU Directive 97/23/EC (PED) 33Bibliography344ForewordThis
17、document (EN ISO 4126-2:2003) has been prepared by Technical Committee CEN/TC69 “Industrial valves“,the secretariat ofwhich isheld by AFNO R, in collaboration with ISO/TC185 “Safety devices for protection againstexcessive pressure“.This European Standard EN ISO4126-2:2003 shall be given the status o
18、fa national s tandard,eitherbypublicationof an identical textor by endorsement, at the latest by July 2003, and conflicting national standards shall bewithdrawn at the latest byJuly2 003.Thisdocument hasbeen prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade
19、Association, and supports essential requirements of EU Directive(s).For relationshipwith EU Directive(s), see informative Annex ZA, which is an integral part of thisdocument.This standard for safety devices for protection againstexcessive pressure consists of seven parts of which this isPart 2. The
20、various parts are:null Part 1: Safety valves.null Part 2: Burstingdisc safety devices.null Part 3: Safety valvesand bursting disc safety devices in combination.null Part 4: Pilot operated safety valves.null Part 5: Controlled safety pressure relief systems (CSPRS).null Part 6: Application, selection
21、 and installation of bursting disc safety devices.null Part 7: Common data.Part 7 contains data that is common to more than one of the parts of this standard to avoid unnecessary repetition.Annex A is normative. AnnexB isinformative.According to the CEN/CENELEC Internal Regulations, the national sta
22、ndards organizations of the followingcountriesare bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain,Sweden, Switzerland and the Unit
23、ed Kingdom.5IntroductionA bursting discsafety device isa non-reclosingpressure relief device used to protect pressure equipment such aspressure vessels, piping, gas cylinders or otherenclosures from exces sive pressure and/orexcessive vacu um.A bursting discsafety device typicallycomprise san assemb
24、ly of components including a bursting disc, a burstingdisc holderand,where necessary, other components such as back pressure supports, stiffening rings etc.The bursting discisa pressure-containing and pressure-sensitive part of the bursting disc safety device and isdesigned to openbybursting at apre
25、-determined pressure. There are many different types of bursting disc safetydevices manufactured in corrosion resistant materials, both metallic and non-metallic, to cover a wide range ofnominal sizes,burst pressures and temperatures.1 ScopeThis part of this European Standard specifies the requireme
26、nts for bursting disc s afety devices.It includes the requirements for the design, manufacture, inspection, testing, certification, marking, and packaging.The requirements for the application, selection and installation of bursting disc safety devices are given in Part 6 ofthis European Standard.2 N
27、ormative referencesThis European Standardincorporates by dated or undated reference, provisions from other publications. Thesenormative references arecited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions ofa
28、ny of thesepublications applyto this EuropeanStandard onlywhen incorporated in it byamendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 485-1, Aluminiumand aluminium alloys Sheet, strip and plate Part 1: Technical condition
29、s for inspectionand delivery .EN 485-2, Aluminium and aluminium alloys Sheet, strip and plate Part 2: Mechanical Properties.EN 485-3, Aluminium and aluminium alloys Sheet, strip and plate Part 3: Tolerances on shape and dimensionsfor hot-rolled products.EN 485-4, Aluminium and aluminium alloys Sheet
30、, strip and plate Part 4: Tolerances on shape and dimensionsfor cold-rolled products.EN 573-3, Aluminium and aluminium alloys Chemical composition and form of wrought products Part3:Chemical composition.EN 573-4, Aluminium and aluminium alloys Chemical composition and form of wrought products Part4:
31、 Formsof products.EN 1092-1 , Flanges and their joints - Circular flanges forpipes,valves, fittingsand accessories, PN designated Part 1: Steel flanges.EN 1333,Pipework components - Definition and selection of PN.6EN 1652,Copper and copperalloys Plate, sheet, strip and circles for generalpurposes.EN
32、 1653,Copper and copperalloys Plate, sheet and circles forboilers, pressure vess els and hot water storageunits.EN 10028-1, Flat products made of steels for pressure purposes Part1: General requirements.EN 10028-7, Flat products made of steels for press ure purposes Part7: Stainless s teels.EN 10088
33、-1, Stainless steels Part 1: Listof stainless steels.EN 10095, Heat resisting steels and nickel alloys.EN 10222-1, Steel forgings forpressure purposes Part1: General requirements foropen die forgings.EN ISO 6708, Pipework components - Definition and selection of DN (nominal size) (ISO 6708:1995).DIN
34、 17740, Wrought nickel Chemical composition.DIN 17742, Wrought nickel alloy with chromium Chemical composition.DIN 17743, Wrought nickel alloys with copperChemical composition.DIN 17744, Wrought nickel alloys with molybdenum and chromium Chemical composition.DIN 17850, Titanium Chemical composition.
35、SEW 400, Rolled and forged stainless steels.BS 3072, Specification for nickel and nickel alloys Sheet and plate.BS 3073, Specification for nickel and nickel alloys Strip.ASTM A240/A240M, Standard specification for chromium and chromium-nickel stainlesssteel plate, sheet and stripfor pressure vessels
36、 and for general applications.ASTM B127,Standard specification fornickel-copper alloy (UNS N04400)plate, sheet, and strip .ASTM B162, Standard specification fornickel plate, sheet and strip .ASTM B168, Standard specification for nickel-chromium-iron alloys (UNS N06600, N06601, N06603, N06690,N06025,
37、 and N06045)and nickel-chromium-cobalt-molybdenum alloy (UNS N06617) plate, sheet and strip.ASTM B209, Standard specification foraluminium and aluminium-alloy sheet and plate.ASTM B265, Standard specification for titanium and titanium alloy strip, sheet and plate.ASTM B333, Standard specification fo
38、rnickel-molybdenum alloy plate, sheet and strip.ASTM B424, Standard specification for Ni-Fe-Cr-Mo-Cu alloy (UNS N08825 and UNS N08221), plate, sheet andstrip.ASTM B443, Standard specification for nickel-chromium-molybdenum-columbium alloy (UNS N06625) and nickel-chromium-molybdenum-silicon alloy (UN
39、S N06219), plate, sheet and strip.ASTM B569, Standard specification forbrass strip in narrow widths and light gauge for heat-exchanger tubing.ASTM B575, Specification for low-carbon nickel-molybdenum-chromium, low-carbon nickel-chromium-molybdenum, low-carbon nickel-chromium-molybdenum-copper, low-c
40、arbon nickel-chromium-molybdenum-tantalum, low-carbon nickel-chromium-molybdenum-tungsten alloy plate, sheet and strip.7ASTM B708,Standard specification for tantalum and tantalum a lloy, plate, sheet and strip.3 Terms and definitionsFor the purposesof this European Standard, the following terms and
41、definitions apply.3.1bursting disc safety devicenon-reclosing pressure relief device actuated by differential pressure and designed to function by the bursting ofthe burstingdisc(s), and which isthe complete assemblyof installed components including,where appropriate, thebursting disc holder3.2burst
42、ing disc assemblycomplete assemblyof components which are installed in the bursting disc holder to perform the desired function3.3bursting discpressure-containing and pressure-sensitive component of a bursting disc safety device3.4bursting disc holderpart of a bursting disc safetydevice which retain
43、s the bursting disc assemblyin position3.5conventional domed bursting disc (also referred to as: forward-acting)burstingdisc which is domed in the direction of the bursting pressure (i.e.where the bursting pressure is applied tothe concave side of the bursting disc, see Figure 1)3.6slotted lined bur
44、sting discburstingdiscmade up of two or more layers, at least one ofwhich is s lit or slotted to control the bursting pressureof the bursting disc3.7reverse domed bursting disc (alsoreferred to as: reverse-acting)bursting disc which is domed against the direction of the bursting pressure (i.e. where
45、 the bursting pressure isapplied to the convex side of the bursting disc, see Figure 2)3.8flat bursting discbursting disc having one or more layerswhich is flatwhen installed. It may be made of a ductile or brittle material3.9graphite bursting discbursting disc manufactured from graphite, impregnate
46、d graphite, flexible graphite or graphite composite anddesigned to burst due to bending or shearing forcesNOTE The following definitions apply:a) graphite. A crystalline form of the element carbon;b) impregnated graphite. Graphite in which the open porosity isimpregnated with a filler material;c) fl
47、exible graphite. A graphite structure formed by the compression of thermally exfoliated graphite intercalationcompounds;8d) graphite composite. Made up of two or more distinct materials and having different propertiesto those of theseparate materials and in which the proportion of graphite is over50
48、 per cent byweight.3.10bursting pressurevalue ofthe differential pressure between the upstreamside and the downstream side of the bursting discwhen itbursts3.11specified bursting pressurebursting pressure quoted with a coincident temperature when defining the bursting disc requirements (used inconju
49、nction with a performance tolerance, see 3.15)3.12specifiedmaximum bursting pressuremaximum bursting pressure quoted with a coincident temperature when defining the bursting discrequirements(used in conjunction with specified minimum bursting pressure, see 3.13)3.13specifiedminimum bursting pressureminimumbursting pressure quoted with a coincident temperature when defining the bursting disc requirements(used in conjunction with specified maximum bursting pressure, see 3.12)3.14co
