1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Code of practice for instrumentation in process control systems: installation design and practiceBS 6739:2009Lice
2、nsed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBS 6739:2009 BritiSh StandardPublishing and copyright informationthe BSi copyright notice displayed in this document indicates when the document was last issued. BSi 2008iSBn 978 0 580 55607 4iCS 17.020; 2
3、5.040.40; 29.130.01the following BSi references relate to the work on this standard: Committee reference GEL/65 draft for comment 08/30136724 dCPublication historyFirst published 1986 Second (present) edition, december 2008Amendments issued since publicationAmd. No. Date Text affected Licensed Copy:
4、 Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 iBS 6739:2009ContentsForeword vi1 Scope 12 normative references 13 terms, definitions and abbreviations 63.1 terms and definitions 63.2 abbreviations 84 Personnel safety 104.1 General 104.2
5、 responsibilities 104.3 Permittowork 114.4 Work equipment 124.5 Personal protective equipment 154.6 Lifting and handling operations 164.7 Working at height 174.8 Safe access and egress 174.9 Safety signs and signals 184.10 Materials, dust and escaping fumes, gases and process fluids giving rise to f
6、ire, asphyxiation, toxic or explosion hazard 184.11 Physical agents 194.12 Work in confined spaces 214.13 Pressure equipment 224.14 Work on or with electrical systems and equipment 234.15 Potentially explosive atmospheres 234.16 ionizing radiation and radioactive substances 234.17 Working with displ
7、ay screens 254.18 Work on construction sites 265 instrumentation in hazardous areas 265.1 Classification of hazardous areas and selection of instrumentation 265.2 Electrical apparatus 285.3 Batteries, power packs and portable electrical equipment 295.4 nonelectrical equipment 296 documentation 307 P
8、rocess sensors and measuring devices 307.1 Flow 317.2 Pressure 577.3 temperature 647.4 Level 717.5 Mechanical measurements 807.6 Weighing machines 837.7 density measurement 867.8 Multivariable transmitters/controllers 907.9 Quality measuring instruments 907.10 Fibre optic instrumentation 988 Communi
9、cation 1018.1 SMart instrumentation 1018.2 Security of communications 1088.3 Wireless instruments 1098.4 Fibre optic device communication 1128.5 Modems 1129 Pollution prevention and control 1129.1 General 1139.2 Stack emissions to air 1149.3 Monitoring discharges to water and sewer 1179.4 Energy eff
10、iciency 118Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBS 6739:2009ii BSI 2008BritiSh Standard9.5 Electromagnetic compatibility (EMC) 1199.6 Waste from electrical and electronic equipment (WEEE) 1209.7 restricted substances 1219.8 Batteries (inc
11、luding battery packs, button cells and accumulators) 12210 regulating devices 12210.1 Mechanical protection 12310.2 Preinstallation checks 12310.3 Control valve installations 12510.4 access for testing and maintenance 12510.5 Environmental protection 12610.6 Piping 12610.7 Control valve bodies 12710
12、.8 Control valve actuators 12810.9 auxiliary equipment 12910.10 Variable speed drive (VSd) systems 13111 Pneumatic and hydraulic supply systems 13611.1 General 13611.2 Pneumatic supply systems 13611.3 hydraulic supply systems 14012 Safetyrelated instrumentation 14212.1 General safety compliance 1431
13、2.2 installation and commissioning planning 14412.3 Safety function proof testing 14412.4 redundancy 14512.5 Cabling and piping 14512.6 identification 14513 Control room, associated equipment rooms and electronic systems 14513.1 General 14513.2 Location and environment 14613.3 Earthing 14913.4 Elect
14、rical power supplies 14913.5 Protection 15013.6 data transmission systems 15313.7 Field equipment 15313.8 testing and commissioning 15314 instrument piping and tubing 15414.1 General 15414.2 air supply piping 15514.3 transmission/signal tubing 15614.4 Process impulse piping 16014.5 Piping and tubing
15、 supports 16115 instrument cabling 16315.1 General 16315.2 Cable classification 16315.3 Signal cables 16415.4 temperature signal cables 16615.5 Coaxial cables 16615.6 Fibre optic cables 16615.7 Fieldbus cabling 16715.8 information technology cabling 16715.9 Fire and gas detection equipment cabling 1
16、6715.10 Safetyrelated system cabling 16815.11 Mineral insulated copper cables (MiCC) 16815.12 Cable routing 16815.13 Cable separation 169Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 iiiBS 6739:200915.14 instrument cable
17、installation 17015.15 Junctions and terminations 17215.16 Cable tray and supports 17315.17 Cable trenches 17515.18 Cable marking 17615.19 Panel wiring 17616 Earthing 17716.1 General 17716.2 design considerations 17816.3 Control room and associated rooms 17816.4 Control centre earthing 17916.5 Cable
18、earthing 18016.6 Fieldmounted instrument enclosures 18016.7 instrument cable racks, trays and conduit 18016.8 installation guidance 18016.9 Conformity to design 18117 Electrical power supply systems 18117.1 General 18117.2 Power supply categories 18317.3 design considerations 18417.4 Power supply si
19、zing 18417.5 Supply protection and isolation 18417.6 intrinsically safe power supplies 18518 installation 18518.1 installation and documentation 18518.2 installation drawings 18618.3 instrument protection and storage 18718.4 instrument mounting and accessibility 18719 testing and verification 18819.
20、1 responsibility for testing and approval 18819.2 testing before commissioning 18919.3 Software 18919.4 inspection upon receipt 19019.5 Preinstallation testing 19019.6 Pressure testing of instrument piping and tubing 20119.7 testing of instrument cables 20319.8 Precommissioning (including loop testi
21、ng) 20319.9 Check sheets 20620 Commissioning and acceptance 20620.1 Commissioning 20720.2 acceptance 209Annexesannex a (informative) Guidance on legislation 211annex B (informative) List of test and calibration equipment 238annex C (informative) Guidance on information to be included on calibration
22、and commissioning documentation 240Bibliography 248List of figuresFigure 1 typical inline flowmeter installations 32Figure 2 typical tapping point location on a Venturi tube 33Figure 3 typical pipe tapping point location on an orifice plate carrier ring 34Figure 4 typical tapping point locations for
23、 flangemounted orifice plate 34Figure 5 typical radial location for tappings on a horizontal or sloping pipe 35Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBS 6739:2009iv BSI 2008BritiSh StandardFigure 6 typical impulse pipework connections for m
24、easurement of flow of liquid 36Figure 7 typical impulse pipework connections for measurement of flow of steam or condensing vapour 37Figure 8 typical impulse pipework connections for measurement of flow of gas 38Figure 9 typical impulse pipework connections for measurement of flow of liquid with sus
25、pended material 39Figure 10 typical impulse pipework connections for measurement of flow where seal pots are used (orifice plate) 41Figure 11 typical arrangement of differential pressure pitot tube installation for measurement of liquid flow 43Figure 12 typical cathodic protection 51Figure 13 Exampl
26、e of ultrasonic doppler flow measurement 53Figure 14 Example of ultrasonic transit time flow measurement 53Figure 15 Example of pressure indicator or transducer hookups for liquid measurement 58Figure 16 Example of pressure indicator or transducer with condensate seals for hot vapour or steam servic
27、e 59Figure 17 typical arrangement of pressure gauge with chemical seal 60Figure 18 typical pressure gauge with seal pots 61Figure 19 Example of independent support for pressure gauges up to 150 mm (6 in) in diameter 63Figure 20 Example of level measurement on a vessel using a standpipe 73Figure 21 E
28、xample of level measurement using purged dip tube 74Figure 22 Example of level measurement using differential pressure transmitter on vented tank 75Figure 23 Example of differential pressure level measurement on a pressurized vessel 75Figure 24 Example of differential pressure level measurement on a
29、 vessel containing a liquid near saturation conditions 76Figure 25 Example of nucleonic level measurement 78Figure 26 Example of optical time domain reflectometry 99Figure 27 typical raman and Brillouin bands 100Figure 28 typical cabling topology for analogue instrumentation 102Figure 29 typical cab
30、ling topology for digital SMart instrumentation 103Figure 30 typical multi drop cabling topology for digital SMart instrumentation 103Figure 31 typical topologies for wireless instruments 110Figure 32 Example of electrical and electronic equipment marking 121Figure 33 typical field termination of pn
31、eumatic multitubes 158Figure 34 details of copper tubing trays (examples of construction) 162Figure C.1 Example of instrument preinstallation calibration check sheet 241Figure C.2 Example of instrument loop check sheet 242Figure C.3 Example of pressure indicator calibration check sheet 244Figure C.4
32、 Example of alarm system check sheet 245Figure C.5 Example of pressure relief valve test report 246Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 vBS 6739:2009Summary of pagesthis document comprises a front cover, an insid
33、e front cover, pages i to vi, pages 1 to 272, an inside back cover and a back cover.List of tablestable 1 air header sizing guide 156table 2 Piping and tubing supports 161table 3 Cable classification summary 164table 4 Example of cable separation 170table 5 identification of conductors in fixed inst
34、allations 182table 6 Maximum cable lengths for extension leads 183table 7 test status colour code 189table a.1 Summary of statutory regulations referred to in this British Standard, with details of related EC directives 227Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Unco
35、ntrolled Copy, (c) BSIBS 6739:2009vi BSI 2008BritiSh StandardForewordPublishing informationthis British Standard is published by BSi and came into effect on 1 January 2009. it was prepared by technical Committee GEL/65, Measurement and control. a list of organizations represented on this committee c
36、an be obtained on request to its secretary.Supersessionthis British Standard supersedes BS 6739:1986, which is withdrawn.Information about this documentthis is a full revision of the standard, and introduces the following principal changes:existing recommendations brought up to date to reflect chang
37、es in workplace practice and technology since 1986;new recommendations added to take into account technology introduced since 1986;guidance on legislation brought up to date to reflect regulations and directives introduced since 1986.Use of this documentas a code of practice, this British Standard t
38、akes the form of guidance and recommendations. it should not be quoted as if it were a specification and particular care should be taken to ensure that claims of compliance are not misleading.any user claiming compliance with this British Standard is expected to be able to justify any course of acti
39、on that deviates from its recommendations.BSi permits the reproduction of the specimen check sheets in annex C (Figures C.1 to C.5). this reproduction is only permitted where it is necessary for the user to record findings on the check sheets during each application of the standard.Presentational co
40、nventionsthe provisions in this standard are presented in roman (i.e. upright) type. its recommendations are expressed in sentences in which the principal auxiliary verb is “should”.Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute
41、a normative element.Contractual and legal considerationsthis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Licensed Copy: Wang Bin,
42、 ISO/EXCHANGE CHINA STANDARDS, 17/03/2009 08:08, Uncontrolled Copy, (c) BSIBritiSh Standard BSI 2008 1BS 6739:20091 Scopethis British Standard gives recommendations for, and guidance on, the design for the installation of instrumentation of measurement and control systems in the process industry, an
43、d the implementation and commissioning of this installation. it is intended to be used as a manual of good practice on the site and also to assist those who design the installation.2 Normative referencesthe following referenced documents are indispensable for the application of this document. For da
44、ted references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.Standards publicationsBS 7591, Valves, gauges and other safety fittings for application to boilers and to piping installations for and in connectio
45、n with boilers Part 1: Specification for valves, mountings and fittingsBS 13631, 13 A plugs, socketoutlets and adaptors Specification for rewirable and nonrewirable 13 A fused plugsBS 3680 (all parts), Measurement of liquid flow in open channelsBS 4278, Specification for eyebolts for lifting purpose
46、sBS 4727 (all parts), Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour termsBS 5308 (both parts), Instrumentation cablesBS 54991, Graphical symbols and signs Safety signs, including fire safety signs Part 1: Specification for geometric shapes, colours and layo
47、utBS 58391, Fire detection and fire alarm systems for buildings Part 1: Code of practice for system design, installation, commissioning and maintenanceBS 6346, Electric cables PVC insulated, armoured cables for voltages of 600/1000 V and 1900/3300 VBS 6423, Code of practice for maintenance of electr
48、ical switchgear and controlgear for voltages up to and including 1 kVBS 7430, Code of practice for earthingBS 7454, Method for calculation of thermally permissible shortcircuit currents, taking into account nonadiabatic heating effectsBS 7671, Requirements for electrical installations IEE Wiring Reg
49、ulations Seventeenth editionBS 84443, Risk management Part 3: Guide to risk analysis of technological systemsBiP 3081, Legal admissibility collection (BIP 0008 and BIP 0009) 1)1)BiP 3081 comprises BiP 0008, Code of practice for legal admissibility and evidential weight (in three parts) and BiP 0009, Code of practice for legal admissibility and evidential weight Compliance workbook (in three parts).NOTE The recommendations given
