1、THE ENGINEERING EQUIPMENT AND MATERIALS USERS ASSOCIATIONLIQUID RING VACUUM PUMPS ANDCOMPRESSORSPUBLICATION 151Released by IHS. NOT FOR RESALETHE ENGINEERING EQUIPMENT AND MATERIALS USERS ASSOCIATIONLIQUID RING VACUUM PUMPS ANDCOMPRESSORSPUBLICATION N 151Copyright 1987 The Engineering Equipment and
2、Materials Users AssociationISBN 0 85931 133 33rd Floor, 20LondonEC1A 9HLTelephone:Fax:e-mail:website:Long Lane020 77961293020 7796 1294sales.eemua.co.ukwww.eemua.co.ukENGINEERING EQUIPMENT AND MATERIALS USERS ASSOCIATIONThe Engineering Equipment and Materials Users Association, more commonlyknown as
3、 EEMUA, is a European non-profit membership Association helpingcompanies that own or operate industrial facilities - the users of engineeringequipment and materials.EEMUA aims to improve the safety, environmental and operating performance ofindustrial facilities in the most cost-effective way, there
4、by demonstrating andpursuing leadership in asset management.EEMUA Members pursue these aims through collaboration for mutual benefit,sharing engineering experiences and expertise and by promoting their distinctinterests as the users of engineering products.Specifically, the aims of EEMUA Member comp
5、anies are achieved by:- providing the organisation within which networking, information sharing andcollaboration on non-competitive technical matters can take place;- influencing the way written regulations are interpreted and applied in practice;- presenting and promoting Members views, and encoura
6、ging the application ofgood, sound engineering practices;- developing user guides, specifications, training and competency schemes;-facilitating Members participation in national and international standards making;- influencing relevant national and European legislation and regulations.Formed in 194
7、9 as the Engineering Equipment Users Association, and re-namedin 1983 (as a result of taking over the materials association, OCMA), EEMUA hasfor more than fifty years given companies that own and operate process plants,power stations and other significant industrial facilities, a collaborative voice
8、 inaddressing technical and engineering related issues that impact on good integritymanagement and asset management practices. The Association is open tocompanies of all sizes that meet its engineering user criteria. Further details ofcurrent Members of EEMUA is available on the Associations website
9、,www.eemua.org.EEMUA activities often lead to the production of publications. These are preparedfor Members use and are often offered for sale as well.A list of EEMUA publications for sale is given at the end of this Publication. Thefull list is also on the Associations website, including details of
10、 on-line shoppingfacilities.To enquire about corporate Membership, write to enquirieseemua.org or call+44 (0)20 7621 0011.ABOUT THIS PUBLICATION: LEGAL ASPECTSIn order to ensure that nothing in this publication can in any manner offend against orbe affected by the provisions of the Restrictive Trade
11、 Practices Act 1976, therecommendations which it contains will not take effect until the day following that onwhich its particulars are furnished to the Office of Fair Trading.As the subject dealt with seems likely to be of wide interest, this publication is alsobeing made available for sale to non-
12、members of the Association. Any person whoencounters an inaccuracy or ambiguity when making use of this publication is asked tonotify EEMUA without delay so that the matter may be investigated and appropriateaction taken.It has been assumed in the preparation of this publication that the user will e
13、nsureselection of those parts of its contents appropriate to the intended application, and thatsuch selection and application are correctly carried out by appropriately qualified andcompetent persons for whose guidance the publication has been prepared. EEMUAdoes not, and indeed cannot, make any rep
14、resentation or give any warranty orguarantee in connection with material contained in its publications, and expresslydisclaims any liability or responsibility for damage or loss resulting from their use. Anyrecommendations contained herein are based on the most authoritative informationavailable at
15、the time of writing and on good engineering practice, but it is essential forthe user to take account of pertinent subsequent developments and/or legislation.All rights are reserved. No part of this publication may be reproduced, stored in aretrieval system, or transmitted in any form or by any mean
16、s: electronic, mechanical,photocopying, recording or other.Infringement of copyright is not only illegal, but also reduces the Associations incomethereby jeopardising its ability to fund the production of future publications.in THE ENGINEERING EQUIPMENT AND MATERIALS USERS ASSOCIATIONLiquid ring vac
17、uum pumps and compressorsEEMUA PUBLICATION No 151:1987Comparison between EEMUA Publication 151 and API Standard 681AMENDMENT DATED MAY 2002Overall commentThe vast majority of the requirements of EEMUA 151 are also required in API 681, inmany cases using identical wording. Specific EEMUA requirements
18、 not required byAPI or only “when specified“ are listed below.Specific requirements of EEMUA 151 not in API 681 (listed in order of the relevantEEMUA paragraph)2.2.8 EEMUA requires hold-down bolt holes to be spot-faced - API does only whenspecified.2.4.2 EEMUA requires ancillary connections to be fl
19、anged or machined and studded,except when otherwise agreed or on cast iron casings. API permits threadedconnections and for flammable or toxic services, requires seal welding. Seal weldingis generally not considered acceptable.2.6.1 EEMUA requires the rotor to be stiff enough to avoid contact at 1.5
20、 times maxdifferential pressure. API just specifies max differential pressure.2.6.10 EEMUA requires rotors to be numbered - API does not.2.7.1.9 EEMUA requires the seal plate gasket to be confined. API only requires thiswhen specified,2.8.2.1/2 EEMUA requires rotating parts and complete rotors to be
21、 dynamicallybalanced. API leaves it to the vendor to decide what is necessary.2.9.6 API permits the use of lip-seals on bearing housings, except when specified -EEMUA does not.2.9.8 EEMUA discusses oil cooling and specifies max temperatures - API does not.2.9.13 EEMUA requires replacement of bearing
22、s without disturbing machine ordriver - API does not.2.10.1 API specifies grease lubrication - EEMUA permits oil or grease.2.10.5 EEMUA imposes requirements on oil flingers and rings - API does not.2.11.3.7 EEMUA invites the purchaser to require to review the ring-liquid separatordesign - API does n
23、ot.2.11.4.5 EEMUA requires air coolers to be in accordance with API 661 - API doesnot.2.11.7.1 EEMUA requires ring liquid pumps to comply with API 610 - API permitsANSI pumps.2.11.9 EEMUA requires the ring-liquid system to be protected by relief valves inaccordance with API 520 and 526. API makes no
24、 mention.2.12.2.5 EEMUA requires nodular iron castings to be in accordance with ASTMA395 - API only when specified.2.12.4.5 and 2.12.4.6 EEMUA specifies requirements relating to fabricated casings -API imposes same requirements but only when specified.3.4.5.3 EEMUA requires valving to enable instrum
25、ents to be removed with system inoperation - API does only when specified3.4.7.1 EEMUA requires vibration instrumentation to comply with API 678. This isincorrect - should be API 670.3.5.1.8 EEMUA imposes requirements for piping systems for flammable or toxicservices. API leaves these to be specifie
26、d by the vendor.3.5.2 EEMUA defines the ring-liquid system as process piping and imposes certainrequirements. API leaves the requirements for the ring-liquid system to be specified.3.5.3.3 EEMUA requires instrument and control-air tubing to be stainless steel andspecifies minimum tubing thickness -
27、API does not.3.5.4 EEMUA imposes requirements for ancillary piping systems - API makes noreference to such systems.4.3.3.5 EEMUA requires spare rotors to subject to a mechanical running test - APIdoes not.4.3.4.3 API requires the casing gas leak test to be carried out with the seals installed- EEMUA
28、 does not.4.3.6.3 EEMUA specifies that the sound-level test be in accordance with EEMUA140.4.3.6.6 EEMUA specifies a post-test inspection - API does not.4.3.6.7 EEMUA requires inspection of the hub/shaft fit for hydraulically fittedcouplings - API does not.5 EEMUA requires the vendor to declare the
29、capacity and power consumption of themachine and specifies acceptance criteria. API no corresponding requirements.6.3.2 EEMUA requires a co-ordination meeting when specified. API makes noreference to a co-ordination meeting.EEMUA May 02CONTENTSSECTION 1 - GENERAL1.1 Scope1.2 Alternative1.3 Conflicti
30、ng Requirements 11.4 Definition of Terms1.5 Referenced Publications . 2SECTION 2 - BASIC DESIGN2.1 General 32.2 Casings 42.3 Casing Appurtenances 52.4 Casing Connections2.5 External Forces and Moments 72.6 Rotating Elements 72.7 Seals 82.7.1 Mechanical Shaft Seals 82.7.2 Stuffing Boxes for Conventio
31、nal Packing 102.8 Dynamics 102.8.1 Critical Speeds 102.8.2 Vibration and Balancing 112.9 Bearings and Bearing Housings 22.10 Lubrication 142.11 Ring Liquid System 42.11.1 General 42.11.2 System Components 142.11.3 Ring Liquid Separator 52.11.4 Ring Liquid Cooler 52.11.5 Ring Liquid Storage Vessel 16
32、2.11.6 Ring Liquid Filter 162.11.7 Ring Liquid Pumps 62.11.8 Ring Liquid Piping 62.11.9 Relief Valves 62.12 Materials 1616171818192.13 Nameplate and Rotation Arrows 20SECTION 3 - ACCESSORIES2.12.12.12.22.12.32.12.42.12.5GeneralCastingsForgingsWeldingLow Temperature3.1 Drivers and Transmissions 213.2
33、 Couplings and Guards 23.3 Mounting Plates 223.3.1 General 23.3.2 Baseplate 33.4 Controls and Instrumentation 243.4.1 General 243.4.2 Control Systems 43.4.3 Instrumentation and Control Panels 253.4.4 Instrumentation 53.4.5 Alarms and Shutdowns 263.4.6 Electrical System 83.4.7 Vibration Detectors 83.
34、5 Piping 283.5.1 General 83.5.2 Process Piping 303.5.3 Instrument Piping 03.5.4 Ancillary Piping 13.6 Special Tools 1SECTION 4 - INSPECTION TESTING AND PREPARATION FOR SHIPMENT4.1 General 334.2 Inspection 34.2.1 General 34.2.2 Material Inspection 344.2.3 Mechanical Inspection 54.3 Testing 354.3.1 Ge
35、neral 54.3.2 Hydrostatic Test 364.3.3 Mechanical Running Test 364.3.4 Gas Leak Test 84.3.5 Performance Test 84.3.6 Optional Tests 84.4 Preparation for Shipment 39SECTION 5 - PERFORMANCE 41SECTION 6 - VENDORS DATA6.1 General 436.2 Proposals 36.3 Contract Data 46.3.1 General 446.3.2 Co-ordination Meet
36、ing 446.3.3 Drawings 46.3.4 Curves 56.3.5 Data 5APPENDIX A - DATA SHEETS 47APPENDIX B - DOCUMENTATION REQUIREMENTS 59APPENDIX C - REFERENCED PUBLICATIONS 61ILLUSTRATIONSFigure 1 Cross-section (typical of a Liquid Ring Vacuum Pump or 63Compressor)SECTION 1 - GENERAL1.1 ScopeThis standard covers the m
37、inimum requirements for liquid ring vacuum pumpsand compressors for general service. These include basic design, materialsand auxiliary equipment.A liquid ring machine, whether vacuum pump or compressor, is a rotarypositive-displacement machine in which gas compression is achieved by theaction of a
38、radially bladed impeller mounted in an eccentric or ellipticalcasing which is partially filled with liquid. (See Figure 1).Note : A bullet (o) at the beginning of a paragraph indicates that adecision by the purchaser is required. These decisions should beindicated on the data sheet (see Appendix A);
39、 otherwise they shouldbe stated in the quotation request or in the order.1.2 Alternative Designs1.2.1 The vendor may offer alternative designs. Equivalent metricdimensions, fasteners and flanges may be substituted as mutually agreedupon by the purchaser and the vendor.1.2.2 When specified or agreed
40、by the purchaser national standards maybe substituted for the codes and standards referenced in this document.1.3 Conflicting RequirementsIn case of conflict between this standard and the enquiry, or order, theinformation included in the order shall govern.1.4 Definition of TermsTerms in this standa
41、rd are defined as follows:1.4.1 The Normal Operating Duty defines the conditions under which themachine is required to operate. This is the duty at which the vendorusually certifies that performance is within the tolerances specified.1.4.2 Normal Speed is the operating speed at which the NormalOpera
42、ting Duty is achieved.1.4.3 Maximum Continuous Speed (in revolutions per minute) is thespeed at least equal to 105 percent of the highest speed required by anyof the specified operating conditions.1.4.4 Maximum Allowable Speed (in revolutions per minute) is thehighest speed at which the manufacturer
43、s design will permit continuousoperation.1.4.5 Minimum Allowable Speed (in revolutions per minute) is thelowest speed at which the manufacturers design will permit continuousoperation.1.4.6 Maximum Allowable Temperature is the maximum continuoustemperature for which the manufacturer has designed the
44、 equipment (or anypart to which the term is referred) when handling the specified fluid atthe specified pressure.1.4.7 Minimum Allowable Temperature is the minimum temperature forwhich the manufacturer has designed the equipment (or any part to whichthe term is referred).1.14.8 Maximum Allowable Wor
45、king Pressure is the maximum continuouspressure for which the manufacturer has designed the equipment (or anypart to which the term is referred) when handling the specified fluid atthe specified temperature.1.14.9 Maximum Sealing Pressure is the highest pressure expected at theseals during any speci
46、fied static or operating condition, and duringstart-up and shut-down.1.4.10 Maximum Allowable Differential Pressure is the maximumdifferential pressure for which the manufacturer has designed theequipment for continuous operation.1.4.11 Maximum Allowable Vacuum is the maximum vacuum (minimum suction
47、pressure) for which the manufacturer has designed the equipment.1.4.12 The capacity of a liquid ring machine is the volume flow of gascompressed and delivered referred to the pressure and temperature at thecompressor inlet.1.4.13 The use of the word design in any term (such as design power,design pr
48、essure, design temperature or design speed) should be avoided inthe purchasers specifications. This terminology should be used only bythe equipment designer and the manufacturer.1.5 Referenced Publications1.5.1 The current editions of the standards, codes and specificationslisted in Appendix C shall
49、, to the extent specified herein, form a part ofthis standard. The applicability of changes in standards, codes andspecifications that occur after the inquiry shall be mutually agreed uponby the purchaser and the vendor.1.5.2 The purchaser and the vendor shall mutually determine themeasures that must be taken to comply with any national codes,regulations, ordinances, or rules that are applicable to the equipment.SECTION 2 - BASIC DESIGN2.1 General2.1.1 The equipment (including auxiliaries) covered by
