SIST EN ISO 15748-2:2004
(Main)Ships and marine technology - Potable water supply on ships and marine structures - Part 2: Method of calculation (ISO 15748-2:2002)
Ships and marine technology - Potable water supply on ships and marine structures - Part 2: Method of calculation (ISO 15748-2:2002)
ISO 15748-2 applies to the planning, design and configuration of potable water supply systems on ships, stationary or floating marine structures and inland waterway crafts.
It serves to determine the quantity of potable water to be carried on board, the capacity of the pressurized reservoirs and water heaters, the pumping capacity, etc.
Schiffe und Meerestechnik - Trinkwasser-Versorgungsanlagen auf Schiffen und Seebauwerken - Teil 2: Berechnung (ISO 15748-2:2002))
Diese Norm gilt für die Planung, Konstruktion und Ausführung von Trinkwasser-Versorgungsanlagen auf Seeschiffen, festgegründeten oder schwimmenden Bauwerken der Meerestechnik und auf Binnenschiffen.
Diese Norm dient zur Ermittlung des mitzuführenden Trinkwasservorrats, der Volumen von Druckbehältern, Wassererwärmern und Pumpenleistungen usw.
ANMERKUNG Kunststoffrohre sind nach ISO 15748-1 zugelassen, werden aber zurzeit kaum eingesetzt infolge der Bestimmungen der Klassifikationsgesellschaften, die den Einsatz nur unter bestimmten Bedingungen zulassen. Die Druckverluste der Kunststoffrohre wurden in dieser Norm wegen der nur eingeschränkten Anwendung der Kunststoffrohre noch nicht angegeben.
Navires et technologie maritime - Approvisionnement en eau potable sur navires et structures maritimes - Partie 2: Méthode de calcul (ISO 15748-2:2002)
Ladje in pomorska tehnologija – Oskrba s pitno vodo na ladjah in ostalih strukturah na morju – 2. del: Metoda izračuna (ISO 15748-2:2002)
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RVWDOLKSchiffe und Meerestechnik - Trinkwasser-Versorgungsanlagen auf Schiffen und Seebauwerken - Teil 2: Berechnung (ISO 15748-2:2002))Navires et technologie maritime - Approvisionnement en eau potable sur navires et structures maritimes - Partie 2: Méthode de calcul (ISO 15748-2:2002)Ships and marine technology - Potable water supply on ships and marine structures - Part 2: Method of calculation (ISO 15748-2:2002)47.020.30Sistemi ceviPiping systemsICS:Ta slovenski standard je istoveten z:EN ISO 15748-2:2002SIST EN ISO 15748-2:2004en01-september-2004SIST EN ISO 15748-2:2004SLOVENSKI
STANDARD
SIST EN ISO 15748-2:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 15748-2May 2002ICS 47.020.30English versionShips and marine technology - Potable water supply on shipsand marine structures - Part 2: Method of calculation (ISO15748-2:2002)Navires et technologie maritime - Approvisionnement eneau potable sur navires et structures maritimes - Partie 2:Méthode de calcul (ISO 15748-2:2002)Schiffe und Meerestechnik - Trinkwasser-Versorgungsanlagen auf Schiffen und Seebauwerken - Teil2: Berechnung (ISO 15748-2:2002)This European Standard was approved by CEN on 2 April 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 15748-2:2002 ESIST EN ISO 15748-2:2004
EN ISO 15748-2:2002 (E)2CORRECTED
2002-06-19ForewordThis document (EN ISO 15748-2:2002) 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 publicationof an identical text or by endorsement, at the latest by November 2002, and conflictingnational standards shall be withdrawn at the latest by November 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations ofthe 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 theUnited Kingdom.Endorsement noticeThe text of the International Standard ISO 15748-2:2002 has been approved by CEN as aEuropean Standard without any modifications.NOTE
Normative references to International Standards are listed in annex ZA (normative).SIST EN ISO 15748-2:2004
EN ISO 15748-2:2002 (E)3Annex ZA(normative)Normative references to international publicationswith their relevant European publicationsThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisionsof any of these publications apply to this European Standard only when incorporated in it byamendment or revision. For undated references the latest edition of the publication referred toapplies (including amendments).NOTE Where an International Publication has been modified by common modifications,indicated by (mod.), the relevant EN/HD applies.PublicationYearTitleENYearISO 5620-11992Shipbuilding and marine structures -Filling connection for drinking watertanks - Part 1: General requirementsEN ISO 5620-11996ISO 11271992Stainless steel tubes - Dimensions,tolerances and conventional massesper unit lengthEN ISO 11271996ISO 15748-12002Ships and marine technology -Potable water supply on ships andmarine structures - Part 1: Planningand designEN ISO 15748-12002SIST EN ISO 15748-2:2004
SIST EN ISO 15748-2:2004
Reference numberISO 15748-2:2002(E)© ISO 2002
INTERNATIONAL STANDARD ISO15748-2First edition2002-05-01Ships and marine technology — Potable water supply on ships and marine structures — Part 2: Method of calculation Navires et technologie maritime — Approvisionnement en eau potable sur navires et structures maritimes — Partie 2: Méthode de calcul
SIST EN ISO 15748-2:2004
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SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) © ISO 2002 – All rights reserved iii Contents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Potable water consumption.2 4 Potable water storage.2 5 Determination and sizing of system components.2 6 Flow rates.3 7 Supply pressure.3 8 Generation and maintenance of pressure.3 9 Pipe diameters of distribution lines.4 10 Hot water requirements.5 11 Water heaters.5 12 Circulation lines and circulating pumps.6 13 Calculation example.6 Annex A (informative)
Tables and figures with useful information.7 Annex B (informative)
Form sheets for calculation.18 Annex C (informative)
Calculation example.22 Annex D (informative)
Information concerning the installation of sanitary facilities.38
SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) iv © ISO 2002 – All rights reserved
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 15748-2 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, C and D of this part of ISO 15748 are for information only.
SIST EN ISO 15748-2:2004
INTERNATIONAL STANDARD ISO 15748-2:2002(E) © ISO 2002 – All rights reserved 1 Ships and marine technology — Potable water supply on ships and marine structures — Part 2: Method of calculation 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 waterway crafts. This part of ISO 15748 serves to determine the quantity of potable water to be carried on board, the capacity of the pressurized reservoirs and water heaters, the pumping capacity, etc. NOTE In accordance with ISO 15748-1 plastic pipes are permitted but are rarely used at present due to the restrictive conditions laid down by the classification societies. Pressure losses in plastic pipes have not yet been included in ISO 15748 owing to their limited applicability. 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 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 274, Copper tubes of circular section — Dimensions ISO 1127, Stainless steel tubes — Dimensions, tolerances and conventional masses per unit length 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 15748-1, Ships and marine technology — Potable water supply on ships and marine structures — Part 1: Planning and design SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) 2 © ISO 2002 – All rights reserved
3 Potable water consumption 3.1 General The consumption of potable water depends on the type of ship, underway time (time the crew and passengers are embarked), number of potable water dispensing and supply points and the cruising area. Rough calculations of the daily potable water requirements should be based on the guide values in Table A.1. Determination of potable water consumption with respect to the planned/existing dispensing points should be based on the guide values in Table A.2 for cargo ships and in Table A.3 for passenger ships. 3.2 Potable water requirements of technical equipment The quantity of potable water required by other technical facilities including air conditioning equipment/plants for air humidification is to be taken from the information supplied by the manufacturer of the respective facility and added to the potable water consumption determined in accordance with 3.1. 3.3 Potable water consumption of commissary equipment The following guide values for water consumption have been determined; detailed values shall be supplied by the manufacturer. The determined quantity shall be added to the values determined in accordance with 3.1. =garbage grinders for food disposal = 20 l/min =dishwashing machines
= 3 l/rack up to 8 l/rack =coffee and tea machines
= 18 l/h to 120 l/h =vegetable peeling and cleaning machines = 5 l/filling =washing machines
= 25 l/kg dry laundry 4 Potable water storage Potable water storage and potable water distilling plants shall be provided in consultation with the contractor. 5 Determination and sizing of system components The sizes of system components shall be determined taking into account: =the pipe material to be used; =the configuration of the potable water installations (pipelines, fittings, service devices); =the calculation plans for cold water, hot water and circulation lines. The sizing of components is calculated based on to the expected volume flow at the time of the maximum water comsumption = peak flow. The values and information required for the calculations are listed in Tables A.4 to A.11 and in Figures A.1 to A.4. The use of the forms supplied in annex B has proved helpful for the calculation process. SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) © ISO 2002 – All rights reserved 3 6 Flow rates In order to prevent flow noises and pressure surges, flow rate limitations should be considered. NOTE Two examples of flow rate limitation are given below. Example 1 =2,5 m/s in engine rooms and machinery trunks; =2,0 m/s in commissary spaces; =1,4 m/s in accommodation decks; =1,0 m/s in the hospital and close vicinity; =1,0 m/s in pump suction lines; =0,5 m/s in circulating lines. Example 2 =2,5 m/s for CuNi pipes with DN u 65 (delivery); =2,0 m/s for CuNi pipes with DN 50 and steel pipes with DN u 65 (delivery); =1,4 m/s for CuNi pipes with DN u 25 and steel pipes with DN u 32 (delivery); any material pipe with DN u 65 (suction); =1,0 m/s for pipes with DN u 15 (delivery); any material pipe with DN u 32 (suction); =0,7 m/s for any material pipe with DN u 15 (suction). 7 Supply pressure The minimum system supply pressure (pump, water reservoir) is determined by adding the pressure losses due to: =geodetic differences in altitude; =pressure losses in the apparati; =pressure losses from pipe friction and individual resistances; =minimum flow pressure of 1,5 bar or, following greater demands at the highest dispensing point, plus 10 %. The pressure losses at the suction side shall be taken into consideration. 8 Generation and maintenance of pressure 8.1 General Potable water may either be supplied directly, or indirectly, via pressurized water reservoirs. Direct supply is appropriate if large quantities of potable water per hour are consumed, e.g. on passenger ships. In all other cases mostly pressurized water reservoirs are used. The decision as to which method of potable water supply is suitable depends on the peak demand for potable water and is also influenced by the arrangement, space requirements, weight etc. of the components or component groups within the entire supply system. SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) 4 © ISO 2002 – All rights reserved
The limit for deciding between pressurized water reservoirs of direct pump supply lies between 30 m3/h and 40 m3/h. Minimum supply pressure in accordance with clause 7 shall be ensured. The design temperature for the system is 10 °C. 8.2 Pressurized water reservoirs In order to keep the available quantity of water, i.e. the quantity between pump cut-ins and cut-offs, as great as possible, and to prevent frequent switchings of the pump, the water stored in the pressurized reservoirs is sufficiently pre-compressed with air. This pre-compression shall be 0,3 bar less than the pump cut-in pressure. The pressure difference between cut-in and cut-off pressure shall be between 1 bar and 2 bar. The switching frequency is usually between 6 and 8 switching events h−1; however, 12 switching events h−1 shall not be exceeded. The required reservoir capacity is to be determined in accordance with Figure A.4. 8.3 Supply pumps 8.3.1 General The capacity of centrifugal pumps shall be such that when the cut-off pressure is reached the capacity corresponds to 110 % of the calculated maximum consumption (10 % margin). Reciprocating pumps shall be dimensioned for 120 % to 130 % of the maximum consumption rate determined. Pumps with flat characteristic curves shall be selected. If several pumps are used, the cut-in and cut-off pressures of each pump shall be stepped with respect to each other, e.g. 4 bar, 3,5 bar, 3 bar. Provisions shall be made for quantities of water supplied from continuous-action pumps but remaining unused to be fed back to the potable water reservoirs. 8.3.2 Pump suction lines The guide values listed in Table A.4 are valid for steel pipes and do not include losses caused by pipe elbows, fittings, etc. These losses shall be taken into consideration. 8.3.3 Pump discharge lines The pump discharge line connects the supply pump with the water reservoir via a shut-off fitting. The nominal width shall be determined in accordance with Table A.5. 9 Pipe diameters of distribution lines The pipe diameters shall be determined as follows: =ascertain the calculation flow at service points of pipe sections (for guide values see Table A.12); =determine the sum flows for these pipe sections and allocate to the pipes; =determine the peak flow for these pipe sections in accordance with Figure A.3; =determine pipe diameters and pressure losses provisionally with the help of Figure A.1; if pressure losses are too high, larger diameters shall be selected; SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) © ISO 2002 – All rights reserved 5 or by means of a more simple procedure by determining nominal widths from Table A.11 on the basis of the respective maximum flows. 10 Hot water requirements The volume of hot water to be provided or to be kept in store shall be determined from the peak demand for mixed water using the following equations: MCHVVV=+ (1) MCHMttHCtt−=− (2) MHVVHHC=×+ (3) where VM is the mixed water volume; VC is the cold water volume; VH is the hot water volume; C is the cold water portion; H is the hot water portion; tM is the mixed water temperature; tC is the cold water temperature; tH is the hot water temperature. 11 Water heaters 11.1 Determination of the necessary water heater volume a) Continuous-flow water heaters They shall be sized with respect to the peak demand for hot water. b) Storage heaters The size of storage heaters shall be selected so that the peak demand for hot water: =on passenger ships can be heated in 4 h; =on other ships can be heated in 2 h. An additional heating facility which may be required for emergency use or during docking may be smaller in capacity. For passenger ships, it is recommended that the necessary hot water volume be divided between two or more water heaters. The supply of hot water shall also be ensured in port. SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) 6 © ISO 2002 – All rights reserved
11.2 Guide values for water heater volumes Guide values for necessary water heater volume (depending on the load/number of persons), heating power and additional heating are listed in Table A.6. 12 Circulation lines and circulating pumps 12.1 Determination of nominal widths The nominal widths of circulating lines depend on the nominal widths of the water supply lines. The respective guide values are listed in Table A.7. For systems including several circulating lines, installation of restriction fittings in the direction of flow upstream of the shut-off fitting is recommended. 12.2 Determination of pump delivery flow The pump delivery flow UPV required is determined from the total volume Vtot of the water supply and circulating lines (not including the storage reservoir or water heater capacities) and the number of water circulations per hour according to the following equation: UPtotVnV=× (4) where UPV is the pump delivery flow, in litres per hour; n is the number of circulations per hour; Vtot is the total volume of water supply and circulating lines, expressed in litres. Circulating the hot water three times per hour is enough to prevent excessive cooling of the water. For the volume of water per meter of pipe see Tables A.8 to A.10. 12.3 Determining the head of the pump The head of the pump required, HUP, is determined from the sum of the pressure losses due to pipe friction and individual resistances in the longest circulation section plus 40 %. The slight pressure losses due to the circulation flow through the water distributing lines and risers may be neglected in determining the head of a pump, HUP. 12.4 Selection of pumps Once the pump delivery and the required head, HUP, have been determined, the adequate size of the pump shall be selected with the help of the pump diagram, which shall be supplied by the manufacturer. If the operating point determined is between two pump-performance characteristics curves (P1 and P2 see Figure A.2), selection of the smaller pump is recommended for economic reasons. 13 Calculation example A calculation example for the application of this part of ISO 15748 including tables and figures shown in annex A and the sheets shown in annex B, is given in annex C. SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) © ISO 2002 – All rights reserved 7 Annex A (informative)
Tables and figures with useful information Table A.1 — Guide values for potable water consumption in litre per person/bed and day Type of ship Group of persons embarked Water consumption when fitted with
Flushing toilet system Vacuum toilet system Cargo ship Crew/bed 220 l 175 l Passenger ship Passenger/bed 270 l 225 l Luxury liner Passenger/bed — 275 l Passenger/bed 205 l a 160 l a Ferryboat with cabins Passenger without bed 100 l 55 l Passenger without bed 150 l 105 l Seagoing ship Ferryboat without cabins Crew without bed 100 l 55 l Cargo ship Crew/bed Minimum 150 l Passenger ship with cabins Passenger/crew/bed 220 l 175 l Inland waterway craft Passenger ship without cabins Crew/passenger 100 l Research ship per bed 220 l 175 l Federal armed forces tender and larger Crew/bed 160 l 110 l Special-purpose ship Federal armed forces – smaller than tender Crew/bed 100 l 55 l Fishing vessel Crew/bed Minimum 150 l Offshore Crew/bed 350 l a No shipboard laundry. SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) 8 © ISO 2002 – All rights reserved
Table A.2 — Guide values for cargo ships water consumption at different service points per person and day Service point Consumption per use Frequency of use Consumption Total quantity of water Cold water Hot water a
l per day l/day l/day l/day Wall-hung/pedestal wash basin 2 6 × 12 5 7 Shower base 60 2 × 120 50 70 Flushing W.C. b 10 6 × 60 60 — Vacuum W.C. b 1,2 6 × 8 8 — Urinal b 3 5 × 15 c 15 c — Galley area — — 20 8 12 Laundry b — — 38 15 d 23 Cleaning — — 5 2 3 a At a hot water inlet temperature of 60 °C. b If non-potable water is used the consumption of potable water decreases accordingly. c The use of the urinals reduces the use of the WCs. d Consumption of appliances with hot water connections.
Table A.3 — Guide values for passenger ships water consumption at different service points per person and day Service point Consumption per use Frequency of use Consumption
Total quantity of water Cold water Hot water a
l per day l/day l/day l/day Wall-hung/pedestal wash basin 2,5 8 × 20 8 12 Shower base d 60 2 × 120 50 70 Bath tub 150 1 × 150 60 90 Flushing W.C. b 10 6 × 60 60 — Vacuum W.C. b 1,2 6 × 8 8 — Urinal b 3 5 × 15 c 15 c — Galley dining rooms — — 25 10 15 Laundry b — — 75 to 100 30 to 40 45 to 60 Cleaning — — 20 8 12 Shower and swimming pool — — 10 e — — Fresh water for swimming pool — — 10 e — — Whirlpool — — 60 e — — Sauna 60 1 × 60 — — a At a hot water inlet temperature of 60 °C. b If non-potable water is used the consumption of potable water decreases accordingly. c The use of the urinals reduces the use of the WCs. d If bath tubs and showers are provided, one use per day shall be anticipated. e Additional quantity of water per user and day. SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) © ISO 2002 – All rights reserved 9 Table A.4 — Pump suction lines, nominal widths and maximum pipe lengths l/s 0,5 0,67 0,83 1,0 1,2 1,3 1,5 1,8 2,1 2,8 4,2 5,5 7,0 8,3 Pump delivery flow m3/h 1,8 2,4 3,0 3,6 4,2 4,8 5,4 6,6 7,5 10 15 20 25 30 Nominal width DN 25 32 40 50 65 80 100 Suction lift
m Length of pipe line (m) 0 120 80 105 80 210 140 280 210 140 120 130 100 120 105 1 100 70 90 70 180 120 240 180 120 100 110 85 95 90 2 85 55 75 55 150 100 200 150 100 85 90 70 75 70 3 70 45 60 45 120 80 160 120 80 75 70 60 55 45
Table A.5 — Pump pressure lines, nominal widths l/s 0,5 0,67 0,83 1,0 1,2 1,3 1,5 1,8 2,1 2,8 4,2 5,5 7,0 8,3 Pump delivery flow m3/h 1,8 2,4 3,0 3,6 4,2 4,8 5,4 6,6 7,5 10 15 20 25 30 Nominal DN width 20 25 32 40 50 65 80
Table A.6 — Guide values for water heater volumes, heating power and additional heating Number of persons Water heater volume Heating power Heating-up time from 10 °C to 65 °C Quantity in l of mixed water of 40 °C to be produced in Additional heating power
l kW min 1 h 2 h kW 1 to 10 200 300 15 10 51 115 660 680 1 030 930 8 5 11 to 20 400 650 30 20 51 125 1 320 1 440 2 060 1 940 15 10 21 to 30 650 1 000 40 20 62 192 1 940 1 960 2 920 2 450 20 10 31 to 50 1 000 1 500 40 25 96 230 2 450 2 820 3 440 3 440 20 13 51 to 75 1 000 1 500 2 000 80 60 40 48 96 192 3 440 3 680 3 930 5 400 5 160 4 910 40 30 20 76 to 100 2 000 3 000 80 40 96 288 4 910 5 400 6 880 6 380 40 20 101 to 150 3 000 5 000 100 40 115 480 6 880 8 350 9 330 9 330 50 20 151 to 200 3 000 5 000 160 100 72 192 8 350 9 820 12 280 12 280 60 50 201 to 300 5 000 7 000 200 150 96 179 12 280 14 000 17 200 17 690 60 50 301 to 500 7 000 10 000 300 200 90 192 17 690 19 650 25 060 24 570 70 60 501 to 700 7 000 10 000 400 300 67 128 20 140 22 110 29 970 29 480 80 70 701 to 1 000 10 000 550 70 28 250 41 770 100 NOTE 1 As a rule, single water heaters with more than 3 000 l capacity are not used. For greater hot water demands, two or more water heaters of appropriate size, or continuous-flow heaters are provided. NOTE 2 For every size of number of persons two possible decisions are shown. NOTE 3 The column “Additional heating power” takes into consideration the hot water supply to be ensured in port (see 11.1). SIST EN ISO 15748-2:2004
ISO 15748-2:2002(E) 10 © ISO 2002 – All rights reserved
Table A.7 — Guide values for nominal widths of circulating lines Water supply line nominal width DN Circulating line nominal width DN 12 12 15 12 20 12 25 12 32 12 40 20 50 20 65 25 80 25 100 32
NOTE The value given in Tables A.8 to A.10 are valid for those pipes included in ISO 15748-1. Table A.8 — Water volume in steel pipes Water volume in l/m in Nominal width Unalloyed steel pipes in accordance with Stainless steel pipes in accordance with
ISO 65 ISO 4200 ISO 1127 DN Medium series Heavy series Seamless Welded
6 0,030 0,019 — — — 8 0,061 0,047 — — — 10 0,123 0,102 0,145 0,145 0,154 12 — — — — — 15 0,201 0,172 0,235 0,235 0,257 20 0,366 0,327 0,391 0,412 0,441 25 0,581 0,515 0,638 0,693 0,731 32 1,012 0,924 1,087 1,122 1,207 40 1,372 1,269 1,459 1,500 1,598 50 2,206 2,067 2,
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