1、Date of Issue: November 10,2006 Affected Publication: API Standard 682, Pumps-Shahaft Sealing Systems for Centrifugal and Rotary Pumps, Third Edition, September 2004 ERRATA This errata corrects an editorial error in the third edition of API 682. Page 72, Table 8, Seal qualzjkation test parameters; t
2、he row titled “Mineral oil 150 OC (300 OF) to 400 OC (750 OF) applications“ should read as shown in the last row below. Table 1 - Seal qualifications test parameters Qualification test conditions Test fluids Water Propane 20% NaOH Mineral oil 20 OC (70 OF) to 90 OC (200 OF) applications Mineral oil
3、150 OC (300 OF) to 260 OC (500 OF) applications a The tolerance range for pressure shall be * 2%. The tolerance range for temperature shall be * 2,5 “C (43 OF). Barrierlbuffer test fluids for dual seals glycollwater diesel glycollwater diesel mineral oil Base point Dynamic and static Pressurea MPa 0
4、9 1,8 0,8 0,8 0,8 Cyclic ranges Temperatureb 8OoC(18O0F) 30 OC (90 OF) 20 OC (70 OF) 20 OC (70 OF) 260 OC (500 OF) Pressurea MPa 0,1to0,4 1,l to 1,8 0,l to 0,8 0,l to 1,7 (Type B and C) 0,l to 3,5 (Type A) 0,l to 1,7 (Type B however, the lnstitute makes no representation, warranty, or guarantee in c
5、onnection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict. Suggested revisions are invited and should be submitt
6、ed to API, Standards department, 1220 L Street, NW, Washington, DC 20005, standardsapi.org. This American National Standard is under the jurisdiction of the API Committee on Refinery Equipment, Subcommittee on Mechanical Equipment. This standard is considered identical to the English version of IS0
7、21049. IS0 21 049 was prepared by Technical Committee ISOITC 11 5, Pumps, SC 3, Installation and special applications, in collaboration with Technical Committee, IS0 TC 67, Materials, equipment, and offshore structures for petroleum, petrochemical and natural gas industries, SC 6 Procession equipmen
8、t and systems. Copyright American Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-API Standard 682 1 IS0 21049 Contents Page API Foreword ii Foreword vi Introduction . vii 1 Scope 1 2 Normative references 1
9、 3 Terms and definitions . 3 Sealing systems 10 Seal categories. types and arrangements 10 General . 10 Seal categories 10 Seal types . 11 Seal arrangements 11 Seal orientations 12 Objectives . 12 Specifying andlor purchasing a sealing system 12 . 5 General 19 5.1 Unit responsibility . 19 5.2 Dimens
10、ions 20 Design requirements . 20 Common design requirements (all categories) 20 General information 20 Seal chamber and gland plate 23 Cartridge seal sleeves . 30 Mating rings . 32 Flexible elements . 34 Materials . 34 Design requirements (category-specific) 38 Category 1 seals 38 Category 2 seals 3
11、9 Category 3 seals 40 Specific seal configurations . 41 Arrangement 1 seals . 41 Seal sleeves . 41 Seal chamber and gland plate 41 Arrangement 2 seals . 41 . General 41 Seal sleeves . 42 Seal chamber and gland plates 42 Contacting wet seals with a liquid buffer fluid (2CW-CW) 43 Seal chamber and gla
12、nd plates for contacting wet inner seal with a dry-running containment seal (2CW-CS) 43 Seal chamber and gland plates for non-contacting inner seal with a dry-running containment seal (2NC-CS) 44 Arrangement 3 seals . 44 . General 44 Seal sleeves . 45 Seal chamber and gland plates 45 Contacting wet
13、seal configurations with a liquid barrier fluid (3CW.FB. 3CW.FF. 3CW-BB) 45 Copyright American Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-API Standard 682 1 IS0 21 049 7.3.5 Standard seal types and arr
14、angements for non-contacting seal configurations with a gas barrier fluid (3NC.FB. 3NC.FF. 3NC-BB) . 46 8 Accessories . 46 8.1 Auxiliary piping systems 46 8.2 Mechanical seal flushlcooling systems (Group I) 49 8.3 Quench systems (Group II) 50 8.4 Cooling-water systems (Group Ill) . 50 8.5 Accessorie
15、s and auxiliary system components 51 8.5.1 Cyclone separator . 51 8.5.2 Flow control orifice . 52 8.5.3 Seal flush coolers 53 8.5.4 Barrierlbuffer fluid reservoirs 53 8.5.5 Barrierlbuffer-fluid selection criteria . 57 . 8.6 Barrierlbuffer fluid and seal flush positive-circulating devices 57 8.6.1 Ge
16、neral . 57 8.6.2 Internal circulating device 57 8.6.3 External circulating pump 57 8.6.4 External seal flush systems . 57 8.6.5 Condensate collection reservoir 58 8.6.6 Barrierlbuffer-gas supply systems 58 9 Instrumentation . 59 9.1 General . 59 9.2 Temperature-indicating gauges . 59 9.3 Thermowells
17、 . 59 9.4 Pressure gauges 59 . 9.5 Switches 60 9.5.1 Alarm, trip and control switches 60 . 9.5.2 Pressure switches 60 9.5.3 Level switches . 61 9.5.4 Flow switches 61 9.6 Level indicators . 61 9.7 Flow instruments . 61 9.7.1 Flow indicators 61 9.7.2 Flow meters 61 9.7.3 Flow transmitters . 61 9.8 Re
18、lief valves . 61 9.9 Regulators 62 9.10 Pressure amplifiers . 62 10 Inspection, testing and preparation for shipment . 62 10.1 General . 62 10.2 Inspection . 62 10.3 Testing 63 10.3.1 Seal qualification testing 64 10.3.2 Hydrostatic test for pressure-containing mechanical seal parts and accessories
19、77 10.3.3 Test of job seal by seal manufacturer . 78 10.3.4 Air test 78 10.3.5 Test of job seal by pump manufacturer 78 10.4 Preparation for shipment 79 11 Data transfer 79 1 1 . 1 General . 79 11.2 Proposal data . 80 11.3 Contract data . 81 Annex A (informative) Recommended seal selection procedure
20、 . 85 Annex B (informative) Typical materials standards for seal chamber and mechanical seal components . 130 Annex C (normative) Mechanical seal data sheets 137 Copyright American Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networking permitted withou
21、t license from IHS-,-,-API Standard 682 1 IS0 21 049 Annex D (informative) Mechanical seal codes 146 Annex E (normative) Seal and pump vendor interface responsibilities 148 Annex F (informative) Heat generation and heat soak calculations 150 Annex G (normative) Standard flush plans and auxiliary har
22、dware 157 Annex H (informative) Inspector checklist for all seals . 188 Annex I (normative) Form for mechanical seal qualification test . 189 Annex J (normative) Mechanical seals data requirements form 192 Bibliography . 193 Copyright American Petroleum Institute Provided by IHS under license with A
23、PI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-API Standard 682 1 IS0 21 049 Foreword IS0 (the lnternational Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing lnternational Standa
24、rds is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. lnternational organizations, governmental and non-governmental, in liaison with ISO, also tak
25、e part in the work. IS0 collaborates closely with the lnternational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. lnternational Standards are drafted in accordance with the rules given in the ISOIIEC Directives, Part 2. The main task of technical committees is
26、 to prepare lnternational Standards. Draft lnternational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an lnternational Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibilit
27、y that some of the elements of this document may be the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. IS0 21049 was prepared by Technical Committee ISO/TC 115, Pumps, Subcommittee SC 3, Installation and special applications, in collaborati
28、on with Technical Committee lSO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries, SC 6, Processing equipment and systems. Copyright American Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networki
29、ng permitted without license from IHS-,-,-API Standard 682 1 IS0 21 049 Introduction This lnternational Standard is based on the accumulated knowledge and experience of manufacturers and users of equipment in the petroleum, natural gas and chemical industries, but its use is not restricted to these
30、industries. Users of this lnternational Standard should be aware that further or differing requirements may be needed for individual applications. This lnternational Standard is not intended to inhibit a vendor from offering, or the purchaser from accepting, alternative equipment or engineering solu
31、tions for the individual application. This may be particularly appropriate where there is innovative or developing technology. Where an alternative is offered, the vendor should identify any variations from this lnternational Standard and provide details. The purpose of this lnternational Standard i
32、s to assist purchasers with the selection and operation of mechanical seals for pumps. This lnternational Standard is a stand-alone seal standard and is referenced normatively in IS0 13709. It is applicable to both new and retrofitted pumps, and to pumps other than IS0 13709 pumps (e.g. ASME B73.1,
33、ASME B73.2 and API 676 pumps). In this lnternational Standard, where practical, US Customary units are included in brackets for information. A bullet (0) at the beginning of a clause or subclause indicates that either a decision is required or further information is to be provided by the purchaser.
34、This information should be indicated on data sheets or stated in the enquiry or purchase order (see examples in Annex C). Copyright American Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright America
35、n Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-API Standard 682 1 IS0 21 049 Pumps - Shaft sealing systems for centrifugal and rotary Pumps 1 Scope This lnternational Standard specifies requirements and
36、gives recommendations for sealing systems for centrifugal and rotary pumps used in the petroleum, natural gas and chemical industries. It is applicable mainly for hazardous, flammable andlor toxic services where a greater degree of reliability is required for the improvement of equipment availabilit
37、y and the reduction of both emissions to the atmosphere and life-cycle sealing costs. It covers seals for pump shaft diameters from 20 mm (0,75 in) to 110 mm (4,3 in). This lnternational Standard is also applicable to seal spare parts and can be referred to for the upgrading of existing equipment. A
38、 classification system for the seal configurations covered by this lnternational Standard into categories, types, arrangements and orientations is provided. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only th
39、e edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IS0 7 (all parts), Pipe threads where pressure-tightjoints are made on the threads IS0 261, IS0 general-purpose metric screw threads - General plan IS0 262, IS0 general-
40、purpose metric screw threads - Selected sizes for screws, bolts, and nuts IS0 286-2, IS0 system of limits and fits - Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts IS0 724, IS0 general-purpose metric screw threads - Basic dimensions IS0 965 (all parts), IS0 gen
41、eral-purpose metric screw threads - Tolerances IS0 3069, End-suction centrifugal pumps - Dimensions of cavities for mechanical seals and for soff packing IS0 4200, Plain end steel tubes, welded and seamless - General tables of dimensions and masses per unit length IS0 7005-1, Metallic flanges - Part
42、 1: Steel flanges IS0 10438 (all parts), Petroleum, petrochemical and natural gas industries - Lubrication, haff-sealing and control-oil systems and auxiliaries IS0 1 3709, Centrifugal pumps for petroleum, petrochemical and natural gas industries IS0 1 5649, Petroleum and natural gas industries - Pi
43、ping IEC 60079 (all parts), Electrical apparatus for explosive gas atmospheres IEC 60529, Degrees of protection provided by enclosures (If code) Copyright American Petroleum Institute Provided by IHS under license with API Not for ResaleNo reproduction or networking permitted without license from IH
44、S-,-,-API Standard 682 1 IS0 21 049 AISI, Standards, codes and specifications of the American lron and Steel Institute I) API RP 520 (all parts), Sizing, selection, and installation of pressure-relieving devices in refineries *) API Std 526, Flanged steel pressure relief valves ASME V, ASME Boiler a
45、nd pressure vessel code, Section V, Non-destructive examination 3, ASME VII I, ASME Boiler and pressure vessel code, Section VIII, Rules for the construction of pressure vessels ASME IX, ASME Boiler and pressure vessel code, Section IX, Welding and brazing qualifications ASME B1.l, Unified inch scre
46、w threads (UN and UNR thread form) ASME B1.20.1, Pipe threads, general purpose, inch ASM E B 1 6.1 1, Forged fittings, socket-welding and threaded ASME B16.20, Metallic gaskets for pipe flanges - Ring joint, spiral-wound, and jacketed ASME B73.1, Specification for horizontal end suction centrifugal
47、pumps for chemical process ASME B73.2, Specification for vertical in-line centrifugal pumps for chemical process ASME PTC 8.2, Centrifugal pumps, performance test codes AW S D 1 .I , Structural welding code - Steel 4, EN 287 (all parts), Approval testing of welders - Fusion welding EN 288 (all parts
48、), Specification and approval of welding procedures for metallic materials EN 13445 (all parts), Unfired pressure vessels EPA Method 21, Appendix A of Title 40, Part 60 of the U.S. Code of Federal Regulations, Environmental Protection Agency, United States 6, NEMA 250, Enclosures for electrical equi
49、pment (1 000 volts maximum) 7, NFPA 70, National Electrical Code 8, Title 1, Part A, Section 1 12, U.S. National Emission Standards for Hazardous Air Pollutants (NESHAPs) (Clean Air Act Amendment) 9) 1) Available from the American lron and Steel Institute: 1140 Connecticut Ave., Suite 705, Washington, D.C. 20036, USA. 2) Available from the American Petroleum Instit
