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BS EN 17818:2023:2024 Edition

BS EN 17818:2023:2024 Edition

$189.07

Devices for in-situ generation of biocides. Active chlorine generated from sodium chloride by electrolysis

Published By Publication Date Number of Pages
BSI 2024 46
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This document defines the minimum requirements for treatment systems, which generate the active substance – ā€œActive chlorineā€ – from sodium chloride by electrolysis for on-site (in situ) operation. The in situ generated active substance (IGAS), in this case active chlorine, may be put into a solution (ā€œoff-lineā€) or directly generated in the pipes (ā€œin-lineā€). This document specifies the device construction, and test methods for the equipment used for in situ generation of active chlorine. It specifies requirements for instructions for installation, operation, maintenance, safety and for documentation to be provided with the product. The in situ generation of active substances and the placing of their precursors on the EU market are subject to the specifications of the Biocidal Products Regulation (EU) 528/2012 [ā€œBiocidal productsā€]. Active substances, generated by devices, which are claiming compliance with this document, shall comply with the BPR for both the registered active chlorine, quality standards and the precursor in accordance with appropriate application and ā€œProduct Typeā€ as listed in the BPR. This standard does not identify applications for in situ devices for generation of active chlorine. The range of applications for in situ generation of chlorine is diverse. It is the responsibility of the economic operator/product supplier, claiming compliance with this standard, to identify the appropriate system type and operating conditions for the specific application and to: – specify the quality of the biocide appropriate to the application. This may be defined in national or international standards; – specify the appropriate product type and operating conditions (concentration, dosage rate and quality of the active chlorine); – specify any other regulatory requirements relevant to the specific application; – specify the appropriate precursor sodium chloride, for the application; – and to label the product accordingly.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
12 4 Requirements
4.1 General
4.2 Design
4.2.1 Temperature
4.2.2 Backflow prevention
4.2.3 Safety
4.3 Performance
4.4 Instructions
5 Electrolysis system and components
5.1 General
5.2 Electrolysis cell
13 5.3 Control unit
5.4 Optional items
5.4.1 Flow detector
5.4.2 System for dissipating stray electrical currents
5.4.3 Chlorine production adjustment feature
14 5.4.4 Temperature probe
5.4.5 Conductivity / TDS probe
5.4.6 Buffer tank
6 Process variants
6.1 Overview of process variants
16 6.2 Electrolysis systems with non-divided electrolysis cell
6.2.1 General
6.2.2 Processes with lower generation capacity and short-term operation
19 6.2.3 Processes with high generation capacity and/or long-term operation
21 6.3 Electrolysis system with divided electrolysis cell (membrane or diaphragm)
6.3.1 General
22 6.3.2 Process with acidic chlorine solution
24 6.3.3 Process with neutral chlorine solution
26 6.3.4 Process with alkaline chlorine solution
27 7 Safety requirements
7.1 General requirements
7.2 Hydrogen
28 7.3 Chlorine gas
7.4 Excess products and solutions
7.5 Buffer tank
29 7.6 Safety bunds
7.7 Prevention against backflow
8 Equipment of the room or area for installation of the electrolysis system
30 9 Operation and maintenance
10 Test requirements
10.1 General
31 10.2 Scope of testing
10.2.1 General
10.2.2 System documentation
10.2.3 Chemical characterization
10.2.3.1 General
32 10.2.3.2 Sampling
34 10.2.3.3 Testing the chlorine solution
35 10.2.4 Determination of the active chlorine content (main constituent)
10.2.4.1 General
10.2.4.2 Brief description
10.2.4.3 Reagents
36 10.2.4.4 Equipment
10.2.4.5 Execution
37 10.2.4.6 Specification of the results
10.2.5 Determination of the chlorate content (ClO3āˆ’)
10.2.5.1 Execution
10.2.5.2 Specification of the results
38 10.2.6 Determination of the bromate content (BrO3āˆ’)
10.2.6.1 Execution
10.2.6.2 Specification of the results
10.2.7 Determination of the chloride content (Clāˆ’)
10.2.7.1 Execution
39 10.2.7.2 Specification of the results
40 Annex A (informative)Natural decay of stored hypochlorite solutions
A.1 General
A.2 Decay reactions
41 A.3 Factors influencing chlorine decay and chlorate formation
A.3.1 Influence of temperature and storage time
42 A.3.2 Chlorate formation vs. time and temperature
43 A.3.3 Influence of initial concentration vs. days of storage
A.4 Influence of pH
44 A.5 Influence of decay catalysers (pollutants) and prevention

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BS EN 17818:2023
$189.07