1、November 2005DEUTSCHE NORM Normenausschuss Erd l- und Erdgasgewinnung (N G) im DINNormenausschuss Maschinenbau (NAM) im DINPreisgruppe 36DIN Deutsches Institut f r Normung e.V. Jede Art der Vervielf ltigung, auch auszugsweise, nur mit Genehmigung des DIN Deutsches Institut f r Normung e. V., Berlin,
2、 gestattet.ICS 21.140; 23.080B 9608704www.din.deXDIN EN ISO 21049Pumpen Wellendichtungssysteme f r Kreiselpumpen und rotierende Verdr ngerpumpen (ISO 21049:2004);Englische Fassung EN ISO 21049:2004Pumps Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004);English version EN ISO 21
3、049:2004Pompes Dispositifs d anchit de l arbre pour pompes centrifuges et rotatives (ISO 21049:2004);Version anglaise EN ISO 21049:2004Alleinverkauf der Normen durch Beuth Verlag GmbH, 10772 Berlin www.beuth.deGesamtumfang 203 SeitenDIN EN ISO 21049:2005-11 2 Nationales Vorwort Diese Europische Norm
4、 wurde vom Technischen Komitee CEN/TC 12 Materialien, Ausrstungen und Offshore-Bauwerke fr die Erdl-, petrochemische und Erdgasindustrie (Sekretariat: Frankreich) erstellt. Die ISO 21049:2004 war erarbeitet worden in einer gemeinsamen Arbeitsgruppe (JWG) des Technischen Komitees ISO/TC 115 Pumps; Su
5、bkomitee SC 3 Installation and special application (Sekretariat: USA) und des Technischen Komitees ISO/TC 67 Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries; Subkomitee SC 6 Processing equipment and systems. Experten des Normenausschusses Maschine
6、nbau (NAM) hatten an der Erstellung dieser ISO-Norm mitgewirkt. Diese Europische Norm enthlt unter Bercksichtigung des DIN-Prsidialbeschlusses 13/1983 nur die englische Originalfassung der ISO-Norm. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 21049December 2004ICS 23.100.60; 23.080; 83.140
7、.50English versionPumps - Shaft sealing systems for centrifugal and rotary pumps(ISO 21049:2004)Pompes - Dispositifs dtanchit de larbre pour pompescentrifuges et rotatives (ISO 21049:2004)Pumpen - Wellendichtungssysteme fr Kreiselpumpen undrotierende Verdrngerpumpen (ISO 21049:2004)This European Sta
8、ndard was approved by CEN on 21 December 2004.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
9、 such nationalstandards may be obtained on application to the Central Secretariat 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
10、 and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, N
11、etherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any f
12、orm and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 21049:2004: EEN ISO 21049:2004 (E)2Contents PageForeword . 5Introduction 51 Scope 72 Normative references . 73 Terms and definitions. 94 Sealing systems 164.1 Seal categories, types and arrangements 164.1.1 General. 164.
13、1.2 Seal categories 164.1.3 Seal types. 174.1.4 Seal arrangements 174.1.5 Seal orientations . 184.2 Objectives 184.3 Specifying and/or purchasing a sealing system 185 General. 255.1 Unit responsibility. 255.2 Dimensions 266 Design requirements 266.1 Common design requirements (all categories) 266.1.
14、1 General information 266.1.2 Seal chamber and gland plate . 296.1.3 Cartridge seal sleeves 366.1.4 Mating rings. 386.1.5 Flexible elements 406.1.6 Materials. 406.2 Design requirements (category-specific) . 446.2.1 Category 1 seals 446.2.2 Category 2 seals 456.2.3 Category 3 seals 467 Specific seal
15、configurations 477.1 Arrangement 1 seals. 477.1.1 Seal sleeves. 477.1.2 Seal chamber and gland plate . 477.2 Arrangement 2 seals. 477.2.1 General. 477.2.2 Seal sleeves. 487.2.3 Seal chamber and gland plates . 487.2.4 Contacting wet seals with a liquid buffer fluid (2CW-CW) 497.2.5 Seal chamber and g
16、land plates for contacting wet inner seal with a dry-runningcontainment seal (2CW-CS) . 497.2.6 Seal chamber and gland plates for non-contacting inner seal with a dry-runningcontainment seal (2NC-CS) 507.3 Arrangement 3 seals. 507.3.1 General. 507.3.2 Seal sleeves. 517.3.3 Seal chamber and gland pla
17、tes . 517.3.4 Contacting wet seal configurations with a liquid barrier fluid (3CW-FB, 3CW-FF, 3CW-BB) . 517.3.5 Standard seal types and arrangements for non-contacting seal configurations with a gasbarrier fluid (3NC-FB, 3NC-FF, 3NC-BB). 52EN ISO 21049:2004 (E)3Page8 Accessories. 528.1 Auxiliary pip
18、ing systems . 528.2 Mechanical seal flush/cooling systems (Group I) . 558.3 Quench systems (Group II) 568.4 Cooling-water systems (Group III) 568.5 Accessories and auxiliary system components 578.5.1 Cyclone separator. 578.5.2 Flow control orifice. 588.5.3 Seal flush coolers . 598.5.4 Barrier/buffer
19、 fluid reservoirs 598.5.5 Barrier/buffer-fluid selection criteria 638.6 Barrier/buffer fluid and seal flush positive-circulating devices. 638.6.1 General. 638.6.2 Internal circulating device . 638.6.3 External circulating pump 638.6.4 External seal flush systems. 638.6.5 Condensate collection reserv
20、oir. 648.6.6 Barrier/buffer-gas supply systems . 649 Instrumentation. 659.1 General. 659.2 Temperature-indicating gauges 659.3 Thermowells 659.4 Pressure gauges. 659.5 Switches 669.5.1 Alarm, trip and control switches. 669.5.2 Pressure switches 669.5.3 Level switches. 679.5.4 Flow switches 679.6 Lev
21、el indicators. 679.7 Flow instruments 679.7.1 Flow indicators 679.7.2 Flow meters. 679.7.3 Flow transmitters 679.8 Relief valves 679.9 Regulators . 689.10 Pressure amplifiers 6810 Inspection, testing and preparation for shipment. 6810.1 General. 6810.2 Inspection 6810.3 Testing . 6910.3.1 Seal quali
22、fication testing . 7010.3.2 Hydrostatic test for pressure-containing mechanical seal parts and accessories . 8310.3.3 Test of job seal by seal manufacturer 8410.3.4 Air test 8410.3.5 Test of job seal by pump manufacturer . 8410.4 Preparation for shipment . 8511 Data transfer 8511.1 General. 8511.2 P
23、roposal data 8611.3 Contract data. 87Annex A (informative) Recommended seal selection procedure. 91Annex B (informative) Typical materials standards for seal chamber and mechanical sealcomponents. 136Annex C (normative) Mechanical seal data sheets 143Annex D (informative) Mechanical seal codes . 152
24、EN ISO 21049:2004 (E)4PageAnnex E (normative) Seal and pump vendor interface responsibilities 154Annex F (informative) Heat generation and heat soak calculations. 156Annex G (normative) Standard flush plans and auxiliary hardware 163Annex H (informative) Inspector checklist for all seals. 194Annex I
25、 (normative) Form for mechanical seal qualification test. 195Annex J (normative) Mechanical seals data requirements form 198Bibliography . 199EN ISO 21049:2004 (E) 5 Foreword The text of ISO 21049:2004 has been prepared by Technical Committee ISO/TC 115 “Pumps“ of the International Organization for
26、Standardization (ISO) and has been taken over as EN ISO 21049:2004 by Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum and natural gas industries“ the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standa
27、rd, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. NOTE Attention is drawn to the fact that Clause 10.2.3 permits the use of alternative standards (e.g. EN 13445-5) for the no
28、n-destructive examination of materials. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hung
29、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 21049:2004 has been approved by CEN as EN ISO 21049:2004 without any modifications. EN ISO
30、21049:2004 (E)6IntroductionThis International Standard is based on the accumulated knowledge and experience of manufacturers andusers of equipment in the petroleum, natural gas and chemical industries, but its use is not restricted to theseindustries.Users of this International Standard should be aw
31、are that further or differing requirements may be needed forindividual applications. This International Standard is not intended to inhibit a vendor from offering, or thepurchaser from accepting, alternative equipment or engineering solutions for the individual application. Thismay be particularly a
32、ppropriate where there is innovative or developing technology. Where an alternative isoffered, the vendor should identify any variations from this International Standard and provide details.The purpose of this International Standard is to assist purchasers with the selection and operation ofmechanic
33、al seals for pumps.This International Standard is a stand-alone seal standard and is referenced normatively in ISO 13709. It isapplicable to both new and retrofitted pumps, and to pumps other than ISO 13709 pumps (e.g. ASME B73.1,ASME B73.2 and API 676 pumps).In this International Standard, where pr
34、actical, US Customary units are included in brackets for information.A bullet (G6c) at the beginning of a clause or subclause indicates that either a decision is required or furtherinformation is to be provided by the purchaser. This information should be indicated on data sheets or statedin the enq
35、uiry or purchase order (see examples in Annex C).EN ISO 21049:2004 (E)71 ScopeThis International Standard specifies requirements and gives recommendations for sealing systems forcentrifugal and rotary pumps used in the petroleum, natural gas and chemical industries. It is applicablemainly for hazard
36、ous, flammable and/or toxic services where a greater degree of reliability is required for theimprovement of equipment availability and the reduction of both emissions to the atmosphere and life-cyclesealing costs. It covers seals for pump shaft diameters from 20 mm (0,75 in) to 110 mm (4,3 in).This
37、 International Standard is also applicable to seal spare parts and can be referred to for the upgrading ofexisting equipment. A classification system for the seal configurations covered by this International Standardinto categories, types, arrangements and orientations is provided.2 Normative refere
38、ncesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.ISO 7 (all parts), Pipe threads where pressure-t
39、ight joints are made on the threadsISO 261, ISO general-purpose metric screw threads General planISO 262, ISO general-purpose metric screw threads Selected sizes for screws, bolts, and nutsISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations forho
40、les and shaftsISO 724, ISO general-purpose metric screw threads Basic dimensionsISO 965 (all parts), ISO general-purpose metric screw threads TolerancesISO 3069, End-suction centrifugal pumps Dimensions of cavities for mechanical seals and for soft packingISO 4200, Plain end steel tubes, welded and
41、seamless General tables of dimensions and masses per unitlengthISO 7005-1, Metallic flanges Part 1: Steel flangesISO 10438 (all parts), Petroleum, petrochemical and natural gas industries Lubrication, haft-sealing andcontrol-oil systems and auxiliariesISO 13709, Centrifugal pumps for petroleum, petr
42、ochemical and natural gas industriesISO 15649, Petroleum and natural gas industries PipingIEC 60079 (all parts), Electrical apparatus for explosive gas atmospheresIEC 60529, Degrees of protection provided by enclosures (IP code)EN ISO 21049:2004 (E)8AISI, Standards, codes and specifications of the A
43、merican Iron and Steel Institute 1)API RP 520 (all parts), Sizing, selection, and installation of pressure-relieving devices in refineries 2)API Std 526, Flanged steel pressure relief valvesASME V, ASME Boiler and pressure vessel code, Section V, Non-destructive examination 3)ASME VIII, ASME Boiler
44、and pressure vessel code, Section VIII, Rules for the construction of pressure vesselsASME IX, ASME Boiler and pressure vessel code, Section IX, Welding and brazing qualificationsASME B1.1, Unified inch screw threads (UN and UNR thread form)ASME B1.20.1, Pipe threads, general purpose, inchASME B16.1
45、1, Forged fittings, socket-welding and threadedASME B16.20, Metallic gaskets for pipe flanges Ring joint, spiral-wound, and jacketedASME B73.1, Specification for horizontal end suction centrifugal pumps for chemical processASME B73.2, Specification for vertical in-line centrifugal pumps for chemical
46、 processASME PTC 8.2, Centrifugal pumps, performance test codesAWS D1.1, Structural welding code Steel 4)EN 287 (all parts), Approval testing of welders Fusion welding 5)EN 288 (all parts), Specification and approval of welding procedures for metallic materialsEN 13445 (all parts), Unfired pressure
47、vesselsEPA Method 21, Appendix A of Title 40, Part 60 of the U.S. Code of Federal Regulations, EnvironmentalProtection Agency, United States 6)NEMA 250, Enclosures for electrical equipment (1 000 volts maximum) 7)NFPA 70, National Electrical Code 8)Title 1, Part A, Section 112, U.S. National Emissio
48、n Standards for Hazardous Air Pollutants (NESHAPs)(Clean Air Act Amendment) 9)1) Available from the American Iron and Steel Institute: 1140 Connecticut Ave., Suite 705, Washington, D.C. 20036, USA.2) Available from the American Petroleum Institute, 1220 L Street, NW, Washington, D.C. 20005-4070, USA
49、.3) Available from the American Society of Mechanical Engineers: Three Park Avenue, New York, NY 10016-5990, USA.4) Available from the American Welding Society, 550 N.W. Le Jeune Rd, Miami, FL 33126, USA.5) Comit Europen de Normalisation, 36, rue de Stassart, B-1050 Brussels, Belgium.6) Available from the National Archives and Records Administration, 700 Pennsylvania Avenue, N.W., Washington, D.C.20408, USA.7) Available from the National Electrical Manufacturers Association, 1300 North 17thStreet, Rosslyn, VA 22209, USA.8) Ava
