Recommendations for treatment of water for marine boilers

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

29-07-1983

Publisher

British Standards Institution

Foreword
Committees responsible
Methods
Section one. General
1 Scope
2 References
3 Definitions
4 Control of treatment ashore and afloat
Section two. Sources of water and limiting impurities
             for various groups of boilers
5 Sources of water
6 Effect of boiler plant design and operating
    conditions on required water quality
7 Effect of boiler type on required water quality
Section three. Chemical cleaning
8 General
9 Pre-commission cleaning of boilers and feed systems
10 Post-commission cleaning of boilers
Section four. Objectives of water treatment
11 General
12 Scale formation
13 Hideout
14 Corrosion
15 Steam purity and feed-line corrosion
16 Blowdown
Section five. Treatment of feed water
17 Design considerations
18 Factors under the control of the engineer
Section six. Treatment of water in the boiler
19 General
20 Chemicals
21 Limits of treatment
22 Sampling arrangements and equipment
23 Group 1 boilers
24 Group 2 boilers
25 Group 3 boilers
26 Group 4 boilers
27 Group 5 boilers
28 Group 6 boilers
Section seven. Preservation of idle boilers
29 Long term storage
30 Short term storage
Appendices
A Explanation of terms
B pH value, acidity and alkalinity
C Chemicals used in marine boiler water treatment
D Methods of test
E Preparation of reagents
F On-line instrumentation and automation
Tables
1 Boiler water, feed water and condensate
    characteristics for group 1 boilers (up to 17.5 bar)
2 Boiler water, feed water and condensate
    characteristics for group 2 boilers (17.5 bar to
    31 bar)
3 Boiler water, feed water and condensate
    characteristics for group 3 boilers (31 bar to 42
    bar)
4 Boiler water, feed water and condensate
    characteristics for group 4 boilers (42 bar to 60
    bar)
5 Boiler water, feed water and condensate
    characteristics for group 5 boilers (60 bar to 80
    bar)
6 Boiler water characteristics for group 6 boilers
    (80 bar to 130 bar)
7 Feed water and condensate characteristics for group
    6 boilers (80 bar to 130 bar)
8 Dilutions for phosphate determination
Figures
1 Sample cooling coil for multiple sampling points
2 Alternative methods of adding chemicals
3 Congruent phosphate/pH control graph
4 Maximum concentration of silica in boiler water
5 Effect of mineral acidity on pH value
6 Modified Nessler cylinder
7 Hydraulic system for sampling suspended solids

Covers sources of water and limiting impurities for various groups of boilers, pre-commission cleaning, objectives of water treatment, treatment of water before the boiler and in the boiler, preservation of idle boilers. Appendices give explanation of terms, chemicals used in marine boiler water treatment, methods of testing and list of reagents. Tables on boiler water characteristics for the six pressure ranges into which the boilers are divided.

This British Standard gives recommendations on the treatment of water for marine boilers with working pressures up to 130 bar. It applies to six groups of boilers, classified according to their operating pressures as follows (see also 17.1).

Group 1. Boilers up to 17.5 bar
Group 2. Boilers from 17.5 bar to 31 bar
Group 3. Boilers from 31 bar to 42 bar
Group 4. Boilers from 42 bar to 60 bar
Group 5. Boilers from 60 bar to 80 bar
Group 6. Boilers from 80 bar to 130 bar

Section 6 of the standard gives detailed information on each of these groups. This section gives recommendations for feed water and condensate as well as for the water in the boilers.

This standard is concerned with water conditions for boilers and associated plant, but is not intended to cover all details of the maintenance of equipment.

Committee	CII/62
DevelopmentNote	Supersedes 79/50529 DC. (06/2005) Reviewed and confirmed by BSI, October 2008. (09/2008)
DocumentType	Standard
Pages	94
PublisherName	British Standards Institution
Status	Current

BS 3285:1960	Methods of sampling superheated steam from steam generating units
BS 604:1982	Specification for graduated glass measuring cylinders
BS 1704:1985	Specification for solid-stem general purpose thermometers
BS 612:1966	Specification for Nessler cylinders
BS 3218:1982	Specification for test tubes and boiling tubes
BS 3145:1978	Specification for laboratory pH meters
BS 700-1:1982	Graduated pipettes Specification for general requirements
BS 846:1985	Specification for burettes
BS 5404(1976) : LATEST
BS 2690:1956	Methods of testing water used in industry
BS 2586:1979	Specification for glass and reference electrodes for the measurement of pH
BS 1923:1953	Specification for glass filter funnels

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BS 1170:1983

Recommendations for treatment of water for marine boilers

Table of Contents

Abstract

Scope

General Product Information

Standards Referencing This Book

Category

Subcategory