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BSI PD IEC/TR 61831:2011

BSI PD IEC/TR 61831:2011

$215.11

On-line analyser systems. Guide to design and installation

Published By Publication Date Number of Pages
BSI 2011 76
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This technical report is a guide applicable to on-line analyser systems. It provides the necessary guidance for the system supplier and user to specify or design a complete analyser system from sample point in the process to the final output for display or control purposes.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
7 FOREWORD
9 INTRODUCTION
10 1 Scope
2 Normative references
3 Terms and definitions
11 4 Remarks and considerations
4.1 General remarks
4.2 Further considerations
12 4.3 Reliability
4.4 Design
4.5 Centralisation
4.6 Local mounting
4.7 Pre-assembled systems
13 5 Health, safety and environmental considerations
5.1 Overview
5.2 Prevention of explosions and fires
5.3 Prevention of toxic and asphyxiant hazards
14 5.4 Radiation hazards
5.5 Safety facilities
5.6 Manual shut-down facilities
5.7 Noise
6 Housings
6.1 Overview
15 6.2 Selection of housing
16 6.3 Area classification and toxic danger
6.4 Construction and mounting
18 6.5 Analyser housings with natural ventilation
19 6.6 Analyser housings with forced ventilation
23 7 Sampling systems
7.1 Overview
24 7.2 Sample system terminology
7.3 General requirements
25 7.4 Sample point location
26 7.5 Fast circulating systems (fast loops)
7.6 By-pass systems
7.7 Sample recovery systems
27 7.8 Special considerations
7.9 Multi-stream systems
28 7.10 Construction
31 7.11 Effluent disposal
32 7.12 Calibration facilities
7.13 Automatic calibration
33 8 Analyser communications
8.1 Overview
8.2 Signal transmission
34 8.3 Safety
35 8.4 Cables
8.5 Use of signal
8.6 Alarms
36 Annex A (informative) Typical analyser process line sampling probe
for line sizes NPS 2″ and above
Figures

Figure A.1 – Typical analyser sample probe design
37 Annex B (informative)
Determination of sample probe lengths
38 Tables

Table B.1 – Vibrational mode constants
42 Table B.2 – Example calculations for maximum fluid velocity
45 Annex C (informative)
Sample system calculations
Table C.1 – Nomenclature used in calculations
48 Table C.2 – Equivalent lengths of valves and fittings
50 Table C.3 – Sample system component pressure drop allowances
51 Figure C.1 – Sample system configuration
58 Annex D (informative)
Natural ventilation calculations
Figure D.1 – Schematic showing wind induced free ventilation principleswith worked example ventilation louvre layout and suggested warm air distribution
64 Annex E (informative)
Forced ventilation calculations
65 Annex F (informative)
Example of verification/calibration sequence of data to computer
Figure F.1 – Typical signal sequence during verification
66 Annex G (informative) Analyser house with forced ventilation – Summary of recommended control shut-down actions
for flammable hazard operation
Table G.1 – Shelter safety cause and effect matrix
67 Annex H (informative) Analyser houses with forced ventilation –
Ventilation failure and flammable gas detection trip logic
68 Figure H.1 – Typical analyser shelter logic diagram
69 Annex I (informative)
Typical analyser system schematics
Figure I.1 – Multi-stream sampling for processes of similar pressure and components(e.g. atmospheric sampling)
Figure I.2 – Multi-stream sampling for processes of differing pressure and/or components showing typical double block and bleed arrangement
70 Figure I.3 – Minimum pollution sampling configuration
Figure I.4 – Typical double block and bleed arrangement
71 Annex J (informative)
Example schematic showing a typical wall penetration using a transit
Figure J.1 – Typical wall penetration using a transit
72 Bibliography

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BSI PD IEC/TR 61831:2011
$215.11