SIST EN ISO 15748-1:2004

SLOVENSKI STANDARD
SIST EN ISO 15748-1:2004
01-september-2004
Ladje in pomorska tehnologija – Oskrba ladij in ostalih struktur na morju s pitno
vodo – 1. del: Planiranje in projektiranje (ISO 15748-1:2002)
Ships and marine technology - Potable water supply on ships and marine structures -
Part 1: Planning and design (ISO 15748-1:2002)
Schiffe und Meerestechnik - Trinkwasser-Versorgungsanlagen auf Schiffen und
Seebauwerken - Teil 1: Planung und Konstruktion (ISO 15748-1:2002)
Navires et technologie maritime - Approvisionnement en eau potable sur navires et
structures maritimes - Partie 1: Planification et conception (ISO 15748-1:2002)
Ta slovenski standard je istoveten z: EN ISO 15748-1:2002
ICS:
47.020.30 Sistemi cevi Piping systems
SIST EN ISO 15748-1:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15748-1:2004

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SIST EN ISO 15748-1:2004
EUROPEAN STANDARD
EN ISO 15748-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2002
ICS 47.020.30
English version
Ships and marine technology - Potable water supply on ships
and marine structures - Part 1: Planning and design (ISO 15748-
1:2002)
Navires et technologie maritime - Approvisionnement en Schiffe und Meerestechnik - Trinkwasser-
eau potable sur navires et structures maritimes - Partie 1: Versorgungsanlagen auf Schiffen und Seebauwerken - Teil
Planification et conception (ISO 15748-1:2002) 1: Planung und Konstruktion (ISO 15748-1:2002)
This European Standard was approved by CEN on 1 May 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15748-1:2002 E
worldwide for CEN national Members.

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SIST EN ISO 15748-1:2004
EN ISO 15748-1:2002 (E)
CORRECTED  2002-06-19
Foreword
This document (EN ISO 15748-1:2002) has been prepared by Technical Committee ISO/TC 8
"Ships and marine technology" in collaboration with Technical Committee CEN/TC 300 "Sea-
going vessels and marine technology", the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication
of an identical text or by endorsement, at the latest by November 2002, and conflicting
national standards shall be withdrawn at the latest by November 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
United Kingdom.
Endorsement notice
The text of the International Standard ISO 15748-1:2002 has been approved by CEN as a
European Standard without any modifications.
NOTE Normative references to International Standards are listed in annex ZA (normative).
2

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SIST EN ISO 15748-1:2004
EN ISO 15748-1:2002 (E)
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 5620-1 1992 Shipbuilding and marine structures - EN ISO 5620-1 1996
Filling connection for drinking water
tanks - Part 1: General requirements
ISO 1127 1992 Stainless steel tubes - Dimensions, EN ISO 1127 1996
tolerances and conventional masses
per unit length
ISO 14726-1 1999 Ships and marine technology - EN ISO 14726-1 2001
Identification colours for the content
of piping systems - Part 1: Main
colours and media
ISO 15748-2 2002 Ships and marine technology - EN ISO 15748-2 2002
Potable water supply on ships and
marine structures - Part 2: Method of
calculation
3

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SIST EN ISO 15748-1:2004

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SIST EN ISO 15748-1:2004

INTERNATIONAL ISO
STANDARD 15748-1
First edition
2002-05-01


Ships and marine technology — Potable
water supply on ships and marine
structures —
Part 1:
Planning and design
Navires et technologie maritime — Approvisionnement en eau potable sur
navires et structures maritimes —
Partie 1: Planification et conception




Reference number
ISO 15748-1:2002(E)
©
 ISO 2002

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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
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©  ISO 2002
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ii © ISO 2002 – All rights reserved

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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
Contents Page
Foreword.iv
1 Scope .1
2 Normative references.1
3 Terms and definitions .2
4 Capacity requirements.5
5 Sanitary requirements.5
6 Potable water supply systems .6
7 Technical requirements .7
8 Pipelines .7
9 Pipes and pipe dimensions .9
10 Fittings and pipe joints .9
11 Fittings.9
12 Protective fittings .10
13 Pumps.10
14 Potable water tanks.11
15 Potable water heating plants.13
16 Sterilization of potable water.16
17 Layout of piping.18
18 Calculation principles .21
19 Testing and flushing of pipelines .21
Annex A (informative) Explanations.22
Annex B (informative) Appropriate pipe dimensions .23
Annex C (informative) Inspection and maintenance of filters .25
Bibliography.26

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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 15748 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15748-1 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 3,
Piping and machinery.
ISO 15748 consists of the following parts, under the general title Ships and marine technology — Potable water
supply on ships and marine structures:
— Part 1: Planning and design
— Part 2: Method of calculation
Annexes A, B and C of this part of ISO 15748 are for information only.

iv © ISO 2002 – All rights reserved

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SIST EN ISO 15748-1:2004
INTERNATIONAL STANDARD ISO 15748-1:2002(E)

Ships and marine technology — Potable water supply on ships
and marine structures —
Part 1:
Planning and design
1 Scope
This part of ISO 15748 applies to the planning, design and configuration of potable water supply systems on ships,
stationary or floating marine structures and inland navigation vessels.
This part of ISO 15748 specifies the minimum requirements for potable water supply systems to be met in order to
protect the potable water and to maintain its quality.
It also provides hints on components to be used and on laying of the pipelines.
NOTE The transfer of potable water and the regulations to be observed are not covered by this part of ISO 15748. The
transfer of potable water is subject to special regulations.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 15748. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 15748 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 7-1, Pipe threads where pressure-tight joints are made on the thread — Part 1: Dimensions, tolerances and
designation
ISO 65, Carbon steel tubes suitable for screwing in accordance with ISO 7-1
ISO 161-1, Thermoplastics pipes for the conveyance of fluids — Nominal outside diameters and nominal
pressures — Part 1: Metric series
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 274, Copper tubes of circular section — Dimensions
ISO 426-2, Wrought copper-zinc alloys — Chemical composition and forms of wrought products — Part 2: Leaded
copper-zinc alloys
ISO 1127, Stainless steel tubes — Dimensions, tolerances and conventional masses per unit length
ISO 1635, Wrought copper and copper alloys — Round tubes for general purposes — Mechanical properties
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
ISO 4200, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit
length
ISO 5620-1, Shipbuilding and marine structures — Filling connection for drinking water tanks — Part 1: General
requirements
ISO 14726-1, Ships and marine technology — Identification colours for the contents of piping systems — Part 1:
Main colours and media
1)
ISO 14726-2 , Ships and marine technology — Identification colours for the contents of piping systems — Part 2:
Additional colours for different media and/or functions
ISO 15748-2, Ships and marine technology — Potable water supply on ships and marine structures — Part 2:
Method of calculation
SOLAS 1974, International Convention for the Safety of Life at Sea, 1974
3 Terms and definitions
For the purposes of this part of ISO 15748, the following terms and definitions apply.
3.1
potable water supply system
system for the generation, treatment, transfer, conveyance, storage, transport and distribution of potable water
3.2
water treatment plant
equipment for treating potable water whilst maintaining potable water properties, e.g. using filters, dosage plants,
ion exchangers, disinfecting plants
3.3
potable water heaters
appliances used to heat potable water without affecting its properties for consumption apart from a change in
temperature, e.g. continuous-flow water heaters, storage heaters
3.4
apparatus
collective term for technical installations making use of and/or transforming potable water
EXAMPLE
 distillation and sterilization apparatus;
 large-scale cooking equipment, dosage plant;
 pressurized water reservoirs, water heaters;
 dishwashers, coffee machines, as well as devices of all kinds forming part of the potable water system or connected
temporarily or permanently to it, except for supply and circulating pumps.
3.5
water
collective term for all types of water used for water supply

1) To be published
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
3.6
raw water
untreated water
NOTE Raw water and sea water are considered equivalent.
3.7
freshwater
water originally intended for human consumption and use on board as potable water but also used for certain
technical purposes and for sanitary-hygienic needs
3.8
potable water
water suitable for human consumption and use in compliance with the quality requirements laid down in the
applicable statutory provisions, defined in this part of ISO 15748 as:
a) water from a central public potable water supply;
b) water converted from sea water by evaporation at temperatures exceeding 80 °C;
c) water converted from sea water by evaporation at temperatures below 80 °C, and which has additionally been
sterilized;
d) water generated by reverse osmosis;
e) hot potable water heated in suitable water heaters.
3.9
cold water
cold potable water at temperatures between 5 °C and 25 °C
NOTE The upper temperature limit may be higher e.g. in the tropics.
3.10
hot water
hot potable water at temperatures between 50 °C and 90 °C, usually up to 60 °C
3.11
mixed water
hot and cold potable water mixed by means of a mixer tap
3.12
potable water line
pipeline exclusively carrying potable water
3.13
supply line
entire potable water pipeline system downstream of the discharge (supply) pump
3.14
water main
section of piping between the discharge pump and the point where the cold water line branches off from the line
leading to the central water heater
3.15
distribution line
section of the supply line downstream of the watermain
3.16
ring line
distribution line providing bidirectional water supply by way of loop-type installation
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
3.17
hot-water ring line
distribution line for unidirectional supply only with water circulation by means of a circulating pump to feed back
unused hot water to the water heater
3.18
circulating line
section of the cold/hot-water ring line without dispensing point, via which unused cold water is fed back to the
suction side of the supply pump or unused hot water is fed back to the water heater
3.19
trunk line
riser
vertical section of the supply line branching off from a distribution line
NOTE Deck lines and dispensing lines branch off from trunk lines.
3.20
deck line
section of the supply line branching off from the trunk line within one deck
3.21
service line
single feed line
section of the supply line leading from the deck line to the consumer
3.22
pump discharge line
discharge line downstream of the discharge outlet of a pump
3.23
pump return line
line through which water is fed to the pump
3.24
service fitting/outlet fitting
fitting for shutting off, releasing and controlling the volume flow at the end of a supply line, the outlet side thereof
being in accordance with the service function, e.g. equipment valve, outlet valve, flush valve, mixer tap
3.25
safety fitting
fitting to protect system parts against inadmissible pressure and temperature transgressions, e.g. safety valves
3.26
protective fitting
fitting to protect the water characteristics in the piping system, e.g. vacuum breakers in connection with non-return
valves, pipe disconnectors
3.27
filter
device for extraction of solid matter from potable water
3.28
calculation flow
assumed flow at the service fitting taken as calculation basis:
 
VV=+V 2
()
Rmin 0
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
where

V is the calculation flow, expressed in litres per second;
R

V is the minimum flow, expressed in litres per second;
min

V is the peak flow, expressed in litres per second.
0
3.29
sum flow
sum of the calculation flows for all water-consuming units served via one cross-section
3.30
peak flow
flow decisive for hydraulic calculation, taking into consideration probable simultaneous water withdrawals during
operation
3.31
closed continuous flow heater
water heater resistant to pressure wherein the water is heated whilst passing the heater, with or without storage
3.32
open storage heater
pressureless water heater, heating and storing water in a container which is part of the storage heater
4 Capacity requirements
On ships, marine structures and inland waterway craft, pure potable water shall always be available in sufficient
quantity. The potable water supply system shall be sized and designed accordingly.
Depending on needs, sufficiently sized potable water storage tanks and/or plants for the conversion of sea water to
potable water shall be provided.
Any accommodation areas on ships and marine structures that are not provided with a dispensing facility from a
central potable water supply shall be equipped with a sufficiently sized potable water container.
5 Sanitary requirements
5.1 Potable water
The quality of the potable water shall be such that its consumption and use will not affect human health, particularly
as far as pathogenic microorganisms are concerned; i.e. potable water
 shall be free of pathogenic microorganisms;
 shall be as sterile as possible;
 should be palatable (it shall be colourless, clear, cool, odourless and acceptable with respect to taste);
 may only contain traces of dissolved minerals.
As far as health considerations are concerned, the potable water characteristics shall comply with the potable
water regulations stated by the authorized national governmental bodies.
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
5.2 Protection of the potable water, maintenance of the potable water quality
5.2.1 Potable water supply systems shall be fitted with a means of sterilizing water transferred from land-based
facilities or water stored on board for a prolonged period of time.
5.2.2 It is not permissible to connect potable water lines to lines or facilities carrying water which is not potable
(e.g. cooling freshwater lines); there shall be a hygienically reliable separation between these lines, which may be
achieved, e.g.
 by means of a free air line;
 by means of an indirect connection via the storage units (water supply via a free air line);
 by means of a pipe disconnector;
 by means of a back flow preventer.
5.2.3 Potable water dispensing points where a backflow of water is possible shall be secured by means of
protective fittings in accordance with 3.26.
5.2.4 Any material, auxiliary material or protective coating used shall be safe from a hygienic and physiological
point of view, and shall be sufficiently resistant to any physical, chemical or corrosive stress to be anticipated. It
shall not release any substances which may influence the digestibility, taste, smell or colour of the potable water. If
applicable, the coating shall comply with the requirements of national authorities.
Pressurized components shall not be negatively influenced by water temperatures of up to 90 °C. For service
fittings the maximum temperature is 70 °C.
5.2.5 Internal corrosion shall be prevented as far as possible by selecting and using materials that are suitable
for potable water (cold or hot) and that are compatible with each other.
5.2.6 Compressed-air cushions directly contacting the water surface inside the pressurized reservoir shall not
impair the quality of the potable water.
5.2.7 Plastics and other non-metallic materials shall conform to the requirements and recommendations
concerning the suitability of these materials to potable water, stated by the authorized national bodies.
6 Potable water supply systems
A potable water supply system includes all facilities, piping and apparatus serving to transfer, store, treat, transport
or dispense potable water. Also included in this definition are facilities serving to produce potable water, e.g.
distillation from sea water.
If the potable water is conveyed through apparatus and facilities that will impair its alimentary quality as defined by
the regulations, the potable water system terminates at the assigned safety fitting. The following components may
be included in potable water supply systems:
 potable water tanks;
 transfer, operating and service lines;
 pumps;
 pressurized water reservoirs;
 potable water heaters;
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
 potable water treatment plants;
 potable water distillation plants;
 fittings (shut-off, safety, protection and supply or outlet fittings);
 measuring and control devices. Figure 1 shows an example of realization of a potable water supply system.
7 Technical requirements
7.1 Associated regulations
In planning the installation of potable water supply systems, the following regulations and directives shall be
observed:
 rules for classification and construction of seagoing ships stated by the relevant classification society;
 technical rules given by a marine employer's liability insurance (if applicable);
 nationally-stated requirements concerning potable water systems.
7.2 Identification marking
Fittings and appliances shall be marked legibly and permanently with the manufacturer's designation or name in
order to readily provide identification of the product at any time. The marking shall comply with the applicable
regulations.
7.3 Pressure and temperature
7.3.1 For safety reasons all components shall be designed to sustain the same working pressures; this pressure
shall comply with the highest set pressure of a safety valve within the system.
7.3.2 Pressure surges and drops occurring during operation shall not exceed the applicable limits (see
ISO 15748-2). This, and the admissible flow rates, shall be taken into consideration when selecting the fittings.
7.3.3 Temperature increases in cold water pipes shall be prevented by suitable means; see explanations in
annex A.
7.3.4 The water temperature in hot water pipes shall be at least 50 °C; see explanations in annex A.
8 Pipelines
8.1 Air pipes, filling pipes and overflow pipes
For air pipes, filling pipes and overflow pipes see the requirements of the relevant classification society. The filling
connection for drinking water tanks shall be in accordance with ISO 5620-1.
8.2 Sounding pipes
For sanitary reasons, sounding pipes for operational gauging in potable water tanks are not permitted. To check
the level, fluid level gauges or devices for measuring tank contents shall be installed.
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)

Key 9 Potable water supply pump
1 Accommodation area with showers/W.C. 10 Pressure tank
2 Commissary area 11 Technical load
3 Engine room 12 Pipe disconnector
4 Shower/W.C. 13 Sterilization
5 Filling connection for potable water tanks (see ISO 5620-1) 14 Water heater
6 Potable water generator 15 Heating medium
7 Drinking water tank 16 Cold water circulating pump
8 Sea chest 17 Hot water circulating pump
Figure 1 — Example of a potable water supply system on a ship with four superstructure decks
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SIST EN ISO 15748-1:2004
ISO 15748-1:2002(E)
9 Pipes and pipe dimensions
For potable water piping systems the pipes and pipe dimensions given in Tables B.1 to B.3 may be used taking the
installation and operating instructions, and the respective regulations devised by the cognizant authorities into
consideration.
10 Fittings and p
...