BSI 23/30439405 DC 2023

$45.21

BS 6739. Instrumentation in process control systems: installation design and practice. Code of practice

Published By	Publication Date	Number of Pages
BSI	2023	258

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Categories: 23.040.40 - Metal fittings, BSI

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PDF Pages	PDF Title
1	30439405.PDF
3	30439405 (1).pdf
6	1 Scope 2 Normative references
9	3 Terms, definitions and abbreviated terms 3.1 Terms and definitions 3.1.1 actuator 3.1.2 asset management system
10	3.1.3 atmospheric contamination 3.1.4 authorized person 3.1.5 booster 3.1.6 cause and effect diagram 3.1.7 competent person 3.1.8 control valve 3.1.9 converter 3.1.10 cold commissioning 3.1.11 crash dump 3.1.12 distributed control system 3.1.13 explosive atmosphere 3.1.14 fire suppression system 3.1.15 hot commissioning
11	3.1.16 hysteresis 3.1.17 instrument personnel 3.1.18 instrument process lines 3.1.19 instrument supervisor 3.1.20 inverter 3.1.21 listing 3.1.22 owner/operator 3.1.23 mode of operation (of a SIF) 3.1.24 OSI (open systems interconnection) model 3.1.25 positioner
12	3.1.26 Purdue model 3.1.27 responsible instrument engineer 3.1.28 “sheep dip” facility 3.1.29 standby power supply 3.1.30 star conﬁguration
13	3.1.31 time domain reﬂectometer 3.1.32 transmission line 3.2 Abbreviated terms
14	4 Personnel and work equipment safety 4.1 General
15	4.2 Responsibilities
16	4.3 Permit-to-work system 4.4 Work equipment 4.4.1 General
17	4.4.2 Instructions 4.4.3 Use of tools 4.4.4 Electrical safety
18	4.4.5 Safety of machinery 4.4.6 Safety of pressure equipment
19	4.4.7 Equipment for use in potentially explosive atmospheres 4.4.8 Radio equipment 4.4.9 Construction products
20	4.5 Personal protective equipment 4.6 Lifting and handling operations 4.6.1 Manual handling 4.6.2 Lifting equipment 4.7 Working at height
21	4.8 Safe access and egress 4.9 Safety signs and signals 4.10 Materials, dust and escaping fumes, gases and process ﬂuids giving rise to ﬁre, asphyxiation, toxic or explosion hazards
22	4.11 Physical agents 4.11.1 Mechanical vibration 4.11.2 Noise
23	4.11.3 Electromagnetic radiation 4.11.4 Optical radiation 4.11.4.1 General 4.11.4.2 Artificial optical radiation
24	4.11.4.3 Natural optical radiation 4.12 Work in confined spaces
25	4.13 Pressure equipment
26	4.14 Work on or with electrical systems and equipment
27	4.15 Dangerous substances and potentially explosive atmospheres 4.16 Control of substances hazardous to health 4.17 Lone working
28	4.18 Ionizing radiation and radioactive substances 4.18.1 General 4.18.2 Ionizing radiations 4.18.3 Radioactive substances
29	4.19 Working with display screens
30	4.20 Work on construction sites 5 Instrumentation in hazardous areas 5.1 Classification of hazardous areas and selection of instrumentation
31	5.2 Equipment protection levels (EPLs)
32	5.3 Electrical apparatus 5.4 Batteries, power packs and portable electrical equipment/tools 5.4.1 General
33	5.4.2 Battery replacement 5.5 Non-electrical equipment 5.6 Specific precautions to be taken when working in hazardous areas
34	5.7 Hazardous area documentation required to support hazardous area equipment installation verification 6 Safety-related instrumentation 6.1 Safety-related functions
36	6.2 Safety-related life cycle
38	6.3 Installation and commissioning planning 6.3.1 Functional safety management 6.3.2 Safety reviews 6.3.3 Control and safety instrumentation segregation
39	6.4 Safety function proof testing 6.5 Redundancy 6.6 Cabling and piping 6.6.1 Segregation 6.6.2 Routing
40	6.7 Digital communications 6.8 Identiﬁcation 7 Primary elements 7.1 General 7.2 Flow measurement 7.2.1 General
41	7.2.2 Custody transfer and fiscal metering
42	7.2.3 Differential pressure 7.2.3.1 Installation arrangement 7.2.3.1.1 Primary element location 7.2.3.1.2 Primary element mounting
43	7.2.3.1.3 Tapping point location
44	7.2.3.1.4 Tapping points on horizontal or sloping pipes
45	7.2.3.1.5 Vertical lines 7.2.3.1.6 Impulse pipework connections
50	7.2.3.1.7 Condensate pots
51	7.2.3.1.8 Wet gas drains 7.2.3.1.9 Vents and rodding points 7.2.3.1.10 Seal pots and diaphragm seals 7.2.3.1.11 Pitot tubes and annubars
52	7.2.3.2 Installation 7.2.3.2.1 General
53	7.2.3.2.2 Tapping connections 7.2.3.2.3 Cleaning and purging 7.2.3.2.4 Mounting 7.2.3.2.5 Direction of flow 7.2.3.2.6 Pitot tube alignment 7.2.3.2.7 Instrument manifolds
54	7.2.4 Variable area flowmeters 7.2.4.1 Principle 7.2.4.2 Installation arrangement 7.2.4.2.1 Pipework layout 7.2.4.2.2 Bypass piping 7.2.4.2.3 Strainers 7.2.4.2.4 Location 7.2.4.3 Installation 7.2.4.3.1 Cleaning and purging
55	7.2.4.3.2 Mounting and alignment 7.2.5 Positive displacement ﬂowmeters 7.2.5.1 Installation arrangement 7.2.5.2 Installation 7.2.5.2.1 Pre-installation inspection 7.2.5.2.2 Cleaning and purging of pipework 7.2.5.2.3 Mounting and alignment 7.2.6 Turbine ﬂowmeters
56	7.2.6.1 Installation arrangement 7.2.6.1.1 Location 7.2.6.1.2 Strainers 7.2.6.1.3 Gas eliminators 7.2.6.1.4 Operating pressure 7.2.6.1.5 Electrical connections 7.2.6.2 Installation 7.2.6.2.1 Cleaning and purging 7.2.6.2.2 Mounting and alignment 7.2.6.2.3 Line ﬁlling 7.2.7 Vortex shedding ﬂowmeters
57	7.2.7.1 Installation arrangement 7.2.7.1.1 Pipework arrangement 7.2.7.1.2 Location 7.2.7.1.3 Electrical connections 7.2.7.2 Installation 7.2.7.2.1 Cleaning and purging 7.2.7.2.2 Mounting and alignment 7.2.8 Open channel ﬂow measurement 7.2.8.1 Principle 7.2.8.2 Installation arrangement
58	7.2.8.3 Installation 7.2.8.3.1 Pre-installation inspection 7.2.8.3.2 Alignment 7.2.8.3.3 Setting zero ﬂow 7.2.8.3.4 Head sensing device
59	7.2.9 Electromagnetic ﬂowmeters 7.2.9.1 Installation arrangement 7.2.9.1.1 Location 7.2.9.1.2 Pipework support 7.2.9.1.3 Electrical requirement 7.2.9.1.4 Cathodic protection
60	7.2.9.2 Installation 7.2.9.2.1 Storage
61	7.2.9.2.2 Handling 7.2.9.2.3 Cleaning and purging 7.2.9.2.4 Mounting 7.2.9.2.5 Electrical connections 7.2.9.2.6 Earthing 7.2.9.3 Ultrasonic ﬂowmeters
63	7.2.9.4 Installation arrangement 7.2.9.4.1 Location 7.2.9.4.2 Pipework 7.2.9.4.3 Electrical connections 7.2.9.5 Installation 7.2.9.5.1 Pipework preparation 7.2.9.5.2 Mounting and alignment
64	7.2.9.5.3 Prefabricated ﬂowmeters 7.2.9.5.4 Cleaning and purging 7.2.9.5.5 Electrical connections 7.2.10 Coriolis mass ﬂowmeters 7.2.10.1 General 7.2.10.2 Installation arrangement 7.2.10.2.1 Location 7.2.10.2.2 Pipework
65	7.2.10.2.3 Electrical connections 7.2.11 Flow (switch) sensors 7.3 Pressure measurement 7.3.1 General 7.3.2 Design
66	7.3.3 Installation 7.3.4 Location 7.3.5 Electrical connections
70	7.3.6 Pressure connections 7.3.6.1 Tapping points 7.3.6.1.1 General
71	7.3.6.1.2 Independence 7.3.6.1.3 Radial location on horizontal or sloping pipes 7.3.6.1.4 Installation 7.3.6.2 Impulse pipework 7.3.6.2.1 Arrangement 7.3.6.2.2 Design considerations
72	7.3.6.2.3 Pulsation dampeners 7.3.6.2.4 Injection cleaning 7.3.6.3 Isolating valves 7.3.7 Differential pressure measurement 7.3.7.1 General
73	7.3.7.2 Tapping points 7.3.7.3 Impulse pipework 7.3.7.4 Instrument isolating valves 7.3.8 Pressure gauges 7.3.8.1 Location
74	7.3.8.2 Cleaning and pressure testing 7.3.8.3 Static head compensation
75	7.4 Temperature measurement 7.4.1 General 7.4.2 Thermometer thermowells 7.4.2.1 General
76	7.4.2.2 Evaluation of thermowells for protection against wake frequency-induced stresses 7.4.3 Expansion thermometers
77	7.4.4 Thermocouples 7.4.4.1 Extension wire and compensating cable 7.4.4.1.1 General 7.4.4.1.2 Resistance temperature detectors (RTDs)
78	7.4.4.2 Installation 7.4.4.2.1 General
79	7.4.4.2.2 Installation in hazardous environments 7.4.4.2.3 Thermocouple indication 7.4.5 Resistance thermometers
80	7.4.5.1 Connecting cabling/wiring 7.4.5.2 Installation 7.4.5.2.1 Resistance element 7.4.5.2.2 Interconnecting cables 7.4.5.2.3 Installation in hazardous environments 7.4.6 Total radiation pyrometers
81	7.4.7 Optical pyrometers 7.4.8 Photoelectric pyrometers 7.4.9 Ratio pyrometers 7.4.10 Fibre optic temperature measurement systems 7.5 Level measurement
82	7.5.1 Level gauges
84	7.5.2 Float switches
85	7.5.3 Buoyancy devices 7.5.4 Dip tubes
86	7.5.5 Differential pressure level measurement 7.5.5.1 General 7.5.5.2 Heat traced LP sensing legs 7.5.5.3 Filled LP sensing legs 7.5.5.4 Diaphragm/capillary seals 7.5.5.5 Cryogenic service
89	7.5.6 Capacitive measuring method 7.5.6.1 General
90	7.5.6.2 Installation arrangement 7.5.7 Radar level measurement 7.5.7.1 General 7.5.7.2 Antenna type
91	7.5.7.3 Guided wave radar (GWR) type
92	7.5.8 Magnetostrictive method 7.5.9 Ultrasonic method
93	7.5.10 Nucleonic level measurement
94	7.5.11 Load cell measuring method 7.5.12 Electrical conductivity level switches
95	7.5.13 Vibrating fork level switches 7.5.14 Servo tank gauging 7.6 Mechanical measurements 7.6.1 Position
96	7.6.1.1 Location 7.6.1.2 Mounting 7.6.1.3 Alignment 7.6.1.4 Travel 7.6.1.5 Electrical connections 7.6.2 Speed 7.6.2.1 Mounting
97	7.6.2.2 Contact transducer alignment 7.6.2.3 Non-contact transducer alignment 7.6.3 Vibration and acceleration 7.6.3.1 General 7.6.3.2 Installation 7.6.3.2.1 Location 7.6.3.2.2 Mounting
98	7.6.3.2.3 Electrical connections 7.7 Weighing machines 7.7.1 Portable machines 7.7.2 Dormant machines (mechanical)
99	7.7.3 Dormant machines (load cell type) 7.7.4 Dormant machines (pneumatic) 7.7.5 Single-ended machines 7.7.6 Belt weighers
100	7.8 Density measurement 7.8.1 General 7.8.2 Weighing method 7.8.3 Buoyancy method
101	7.8.4 Pressure differential methods 7.8.4.1 General 7.8.4.2 Installation 7.8.5 Nucleonic density measurement
102	7.8.6 Ultrasonic method 7.8.7 Vibrating element (natural resonance) method 7.8.7.1 Installation of instruments for gases
103	7.8.7.2 Installation of instruments for liquids 7.9 Multivariable transmitters/controllers 7.9.1 General 7.9.2 Installation design 7.10 Quality measuring instruments
104	7.10.1 Analytical probes 7.10.1.1 General 7.10.1.2 Electrolytic conductivity probes 7.10.1.3 pH probes
105	7.10.1.4 Reduction/oxidation (redox) probes 7.10.1.5 Ion-selective probes
106	7.11 Fibre optic instrumentation 7.11.1 Fibre speciﬁcations 7.11.2 Installation 8 Process analysers
107	8.1 In-situ process stream analysers 8.2 Extractive process stream analysers 8.3 Design considerations for the analyser sample train (AST) for extractive process stream analysers 8.3.1 General
109	8.3.2 Sample phase 8.3.3 Sample probe and selection of process tap
110	8.3.4 Sample taps for liquid-filled process lines
111	8.3.5 Sample taps for gas-filled or vapour-filled process lines
112	8.3.6 Minimum insertion depth
114	8.3.7 Operational requirements for probes and probe housings 8.3.7.1 General 8.3.7.2 Filtration 8.3.7.2.1 General
115	8.3.7.2.2 Liquid processes 8.3.7.3 Remote isolation of sample line 8.3.7.4 Back-flush
116	8.3.7.5 Calibration/verification test injection 8.3.7.6 Pressure reduction for gas samples 8.3.7.7 Pressure gauges 8.3.8 Speed of response
117	8.3.9 Sample lines
120	8.3.10 Heated sample lines
121	8.3.11 Heated line terminations 8.3.11.1 General
123	8.3.11.2 Liquid-filled transport lines 8.3.11.3 Other considerations
124	8.3.12 Mountings and housings
125	8.3.13 Sample conditioning systems
126	8.3.14 Vent and efﬂuent lines 8.3.15 Manual sampling
127	8.3.16 Calibration 8.3.16.1 Location of standards 8.3.16.2 Cylinder storage
128	8.3.17 Testing
129	8.3.18 Calibration and commissioning 8.3.19 Safety
130	8.3.20 Storage and handling of equipment 9 Instrument piping and tubing 9.1 General 9.1.1 Classiﬁcation 9.1.2 Routing and location
131	9.1.3 Installation 9.2 Actuation fluid supply piping
132	9.3 Transmissional/signal tubing (non-process) 9.3.1 Pneumatic tubing installation 9.3.2 Multicore tubing
133	9.4 Instrument process lines (including impulse tube, sample tube and purge tube) 9.4.1 General
134	9.4.2 Tubing and compression ﬁttings
135	9.4.3 Instrument process tubing connections 9.4.4 Piping 9.5 Tubing materials 9.5.1 General 9.5.2 Fluid supply and transmission signal tubing 9.5.2.1 General 9.5.2.2 Copper tubing
136	9.5.2.3 Aluminium tubing 9.5.2.4 Plastic tubing 9.5.2.5 Stainless steel tubing 9.5.2.6 Alloy tubing
137	9.5.3 Instrument process lines 9.6 Piping and tubing supports.
140	10 Pneumatic and hydraulic supply systems 10.1 General 10.2 Pneumatic supply systems 10.2.1 Pneumatic air supply systems 10.2.1.1 Air quality
141	10.2.1.2 Operating pressure 10.2.2 Pneumatic air supply components 10.2.2.1 Filters 10.2.2.2 Instrument air compressors
142	10.2.2.3 Air receivers 10.2.2.3.1 Common receivers 10.2.2.3.2 Local receivers 10.2.2.4 Air dryers 10.2.2.5 Cooling systems 10.2.2.6 Valves
143	10.2.2.7 Pipework 10.2.3 Pneumatic air supply instrumentation (and instrumentation interfaces) 10.2.3.1 Air quality 10.2.3.2 Pressure
144	10.2.3.3 Temperature 10.2.3.4 System availability 10.2.4 Commissioning checks 10.2.4.1 Compressors 10.2.4.2 Cooling water circuits 10.2.4.3 Air dryers 10.2.4.4 Air piping and valves 10.3 Hydraulic supply systems
145	10.3.1 General 10.3.2 Hydraulic ﬂuid 10.3.3 Reservoir
146	10.3.4 Pumps
147	10.3.5 Accumulator 10.3.6 Filters
148	10.3.7 Piping 10.3.8 Flexible hoses
149	10.3.9 Conditioning system 10.3.10 Hydraulic control cabinets
150	10.3.11 Hydraulic actuators 10.3.12 Hydraulic system design additional considerations
151	10.3.13 Self-contained hydraulic units 10.3.14 Hydraulic system design reference standards 10.3.15 Hydraulic system inspection and testing 11 Final element devices
152	11.1 Actuated valve types 11.2 Mechanical protection
153	11.3 Installation checks 11.3.1 Visual inspection 11.3.2 Performance checks
154	11.3.3 Partial stroke testing (PST) 11.3.3.1 General 11.3.3.2 Test instigation 11.3.3.3 Test monitoring
155	11.3.3.4 Test recording 11.3.3.5 Verification 11.4 Control valve installations 11.5 Access for testing and maintenance
156	11.6 Environmental protection 11.7 Pipework 11.7.1 Actuated valve installations in process piping
157	11.7.2 Protection during pipeline cleaning and testing 11.8 Final element valve bodies 11.8.1 General 11.8.2 Globe valves 11.8.3 Butterfly valves
158	11.8.4 Ball valves 11.8.5 Vane and guillotine valves 11.9 Actuators 11.9.1 General 11.9.2 Diaphragm actuators 11.9.3 Piston actuators 11.9.4 Power cylinder actuators
159	11.9.5 Electric actuators 11.10 Auxiliary equipment 11.10.1 General 11.10.2 Positioners 11.10.3 Current-to-pneumatic converters
160	11.10.4 Booster relays 11.10.5 Position indicators 11.10.6 Manual handwheels 11.10.7 Accumulators
161	12 Control rooms, associated equipment rooms and electronic systems 12.1 General 12.1.1 Installation 12.1.2 Delivery of equipment 12.1.3 Control room considerations
162	12.2 Location and environment 12.2.1 General 12.2.2 Air conditioning 12.2.3 Ventilated environments
163	12.2.4 Vibration 12.2.5 Electromagnetic and radio frequency effects 12.2.6 Human–machine interface (HMI) equipment location 12.2.7 Lighting 12.2.8 Maintenance access 12.2.9 Authorized access
164	12.2.10 Noise 12.2.11 Earthing 12.3 Electrical power supplies 12.3.1 General 12.3.2 Quality of supply 12.3.3 Standby power supply systems 12.3.4 Temporary power supplies 12.3.5 Continuity of supply
165	12.4 Fire and gas detection, alarm and protection 12.4.1 Detection and active protection
166	12.4.2 Building fire and gas alarm and protection system requirements
167	12.4.3 Gas suppression systems
168	12.5 Protection against electrical damage 12.6 Cabling 12.7 Testing and commissioning 12.7.1 Special test equipment 12.7.2 Commissioning spares 12.7.3 System support
169	12.7.4 Loop checking 13 Instrument and communications cabling and wiring 13.1 General
170	13.2 Cable classiﬁcation
171	13.3 Signal cables 13.3.1 Signal segregation 13.3.2 Instrument signal cable selection
174	13.4 Temperature signal cables 13.5 Instrument power cables (excluding applications requiring fire-resistant circuit integrity) 13.6 Fire and gas detection equipment cabling 13.6.1 Inside buildings 13.6.2 Exterior fire and gas
175	13.7 Energize to trip shutdown and fire signals outside (requiring fire-resistant circuit integrity) 13.8 Industrial communications cabling 13.8.1 General 13.8.2 Proprietary communications interface cabling
176	13.8.3 Process automation fieldbus industrial control network cabling 13.8.4 Industrial ethernet and operational technology network cabling 13.9 Media specific requirements for operational technology cabling 13.9.1 Copper
177	13.9.2 Coaxial cables 13.9.3 Fibre optic cables
178	13.10 Safety-related system cabling 13.11 Mineral-insulated copper cables (MICCs) 13.12 Cable routing
179	13.13 Cable separation 13.13.1 General 13.13.2 Separation between instrument and power cables
180	13.14 Instrument cable installation
182	13.15 Junctions and terminations
183	13.16 Cable tray and supports
184	13.17 Cable trenches
185	13.18 Cable marking 13.19 Panel wiring 13.19.1 Wiring colours
186	13.19.2 Panel terminations 13.19.3 Installation
187	14 Earthing 14.1 General
188	14.2 Design considerations
189	14.3 Control room and associated rooms 14.4 Control centre clean earthing
190	14.5 Cable earthing 14.6 Field-mounted instrumentation
191	14.7 Instrument cable racks, trays and conduit 14.8 Installation guidance 14.9 Earth electrodes 14.10 Instrumentation lightning protection 14.10.1 General 14.10.2 Instruments and cabling inside lightning protected areas 14.10.3 Instruments and cabling outside lightning protected areas
192	14.10.4 Equipment connected data transmission cables subject to interference by lightning 15 Electrical power supply systems 15.1 General
193	15.2 Mains-connected power supply systems
194	15.3 Battery requirements
195	15.4 Design considerations 15.5 Power supply sizing
196	15.6 Supply protection and isolation 16 SMART measurement instrumentation communications and interconnectivity 16.1 SMART instrumentation
197	16.1.1 Analogue mode 16.1.2 Full digital mode
199	16.1.3 Devices with function block support
200	16.1.4 Quantities of devices 16.1.5 Installations in areas potentially containing explosive atmospheres 16.1.6 Device compatibility 16.1.7 Cabling compliance
201	16.1.8 Personnel 16.1.9 Management systems 16.1.10 Instrument data sheets 16.1.11 Safety-related devices
202	16.1.12 Safety-related ﬁeldbuses 16.2 Plant-based wireless instruments
203	16.2.1 Selection of wireless instrumentation 16.2.2 Power management 16.2.2.1 Battery-powered devices
204	16.2.2.2 Alternative powered devices 16.3 Internet of Things (IOT) wireless device implementation
205	16.4 Communications security of maintenance connections to SMART instruments 16.4.1 Plant-based fieldbus device accessibility for maintenance 16.4.2 Plant internal connection security
206	16.4.3 Plant external connection security 16.4.4 Plant wireless instrument security
207	17 Pollution prevention and control 17.1 General 17.2 Stack emissions to air via continuous emission monitoring system (CEMS)
208	17.3 Monitoring discharges to water and sewer 17.3.1 General 17.3.2 Automatic wastewater samplers 17.3.3 Online analysers
209	17.3.4 Flowmeters 17.4 Energy efficiency 17.5 Waste from electrical and electronic equipment
210	17.6 Restricted substances
211	17.7 Batteries (including battery packs, button cells and accumulators) 18 Documentation
212	19 Installation 19.1 Installation and documentation
213	19.2 Installation drawings 19.3 Instrument and associated systems protection and storage 19.4 Instrument mounting and accessibility
214	19.5 Installation
215	19.6 Identification 19.7 Spare parts 19.8 Safe working 20 Testing and veriﬁcation 20.1 Responsibility for testing and approval
216	20.2 Testing before commissioning
217	20.3 Instrumentation systems site security 20.3.1 General 20.3.2 Control and safety system physical hardening 20.3.3 Removable media 20.3.4 Password protection
218	20.4 Software 20.5 General recommendations 20.5.1 Verification upon receipt 20.5.2 Pre-installation testing
219	20.5.3 Pressure testing of instrument piping and tubing 20.5.4 Air supply piping
220	20.5.5 Transmission signal tubing 20.5.6 Instrument process lines
221	20.6 Testing of instrument cables 20.7 Pre-commissioning (including loop testing) 20.7.1 General
223	20.7.2 Microprocessor systems 20.7.3 Complex control systems 20.7.4 Safety instrumented system (SIS) 20.7.5 Alarm systems
224	20.7.6 Electrical interfaces 20.7.7 Interfaces to package control systems 20.7.8 Instrument loop testing procedure
225	20.7.9 Primary elements 20.7.9.1 Temperature loops (thermocouple and resistance thermometer)
226	20.7.9.2 Pressure loops (transmitters and switches) 20.7.9.3 Level loops (transmitters and switches) 20.7.9.4 Flow loops
227	20.7.9.5 Process analysers and associated equipment 20.7.10 Final elements 20.7.10.1 Control valves
228	20.7.10.2 Diaphragm-actuated valves without positioners 20.7.10.3 Diaphragm-actuated valves with positioners
229	20.7.10.4 Other actuators 20.7.10.5 Self-acting pressure safety valves
230	20.8 Preparation for commissioning 20.9 Check sheets 20.10 Hazardous area inspection
231	21 Commissioning and acceptance 21.1 Commissioning 21.1.1 General
232	21.1.2 Preliminary checks 21.1.3 Commissioning procedures 21.1.3.1 General 21.1.3.1.1 Set up 21.1.3.1.2 Loop checks 21.1.3.1.3 Loop tuning 21.1.3.2 Primary element
233	21.1.3.3 Control systems
234	21.1.3.4 Alarm systems 21.1.3.5 Final elements 21.1.3.6 Safety instrumented system (SIS)
235	21.2 Acceptance
236	Annex A (informative) Legislation
237	Annex B (informative) Typical instrument manifolds
240	Annex C (informative) Bonding of equipment
241	Annex D (informative) Guidance on information to be included on as part of the pre-commissioning loop check process D.1 General
249	D.2 Function testing
251	D.3 Interface testing

Additional information

Status	Definitive
Pages	258
Publication Date	2023-12-08
Standard Number	23/30439405 DC
Title	BS 6739. Instrumentation in process control systems: installation design and practice. Code of practice
Descriptors	Pneumatic equipment, Certification (approval), Marking, Control equipment, Electric power systems, Density measurement, Detectors, Noise (environmental), Hydraulic equipment, Pressure gauges, Control systems, Electric wiring systems, Pipework systems, Measuring instruments, Liquid-level indicators, Safety measures, Commissioning, Protected electrical equipment, Flowmeters, Fire, Toxic materials, Electrical safety, Instruments, Electronic equipment and components, Controllers, Process control, Quality assurance systems, Design, Temperature-measuring instruments, Instrumental methods of analysis, Dimensional measurement, Acceptance (approval), Occupational safety, Control panels, Communication cables, Explosive atmospheres, Testing conditions, Testing, Radiation hazards, Installation, Weighing machines, Hazards
Publisher	BSI
Committee	GEL/65
ICS Codes	23.040.40 - Metal fittings

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