1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 11711-1:2013Ships and marine technology Piping and machinery Ballast water sampling and analysisPart 1: Discharge sampling portBS ISO 11711-1:2013 BRITISH STANDARDNational
2、 forewordThis British Standard is the UK implementation of ISO 11711-1:2013. The UK participation in its preparation was entrusted to TechnicalCommittee SME/32/-/3, Ships and marine technology - Piping and machinery.A list of organizations represented on this committee can be obtained on request to
3、its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 73018 4 ICS 47.020.99 Compliance with a British Stan
4、dard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 11711-1:2013 ISO 2013Ships and marine technology Piping and
5、 machinery Ballast water sampling and analysis Part 1: Discharge sampling portNavires et technologie maritime Tuyauterie et machines chantillonnage et analyse de leau de ballast Partie 1: Appareillage de prlvement lvacuationINTERNATIONAL STANDARDISO11711-1First edition2013-02-15Reference numberISO 1
6、1711-1:2013(E)BS ISO 11711-1:2013ISO 11711-1:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, includin
7、g photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749
8、 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 11711-1:2013ISO 11711-1:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Sampling port design . 24.1 Colour 24.2 Materials . 24.3 Co
9、nfiguration of a semi-permanent sample port 24.4 Installation 4Annex A (informative) Sample pipe velocity profiles 6Bibliography 7BS ISO 11711-1:2013ISO 11711-1:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member
10、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
11、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.The procedures used to develop this document and those intended for its further maintenance are
12、described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to
13、the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the IS
14、O list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 8, Ships and marine technology, Subcommittee SC 3, Piping and
15、 machinery.ISO 11711 consists of the following parts, under the general title Ships and marine technology Piping and machinery Ballast water sampling and analysis: Part 1: Discharge sampling portThe following parts are under preparation: Part 2: On-board ballast water sampling and sample processing
16、Part 3: Analyses of ballast water samplesiv ISO 2013 All rights reservedBS ISO 11711-1:2013ISO 11711-1:2013(E)IntroductionThis part of ISO 11711 provides guidance to shipboard personnel and other concerned parties on the design and installation of the sampling port required to obtain representative
17、samples of ballast water from the ballast water discharge piping prior to discharge. Parts 2 and 3 of this part of ISO 11711 will provide guidance on how to handle and process the samples on board the vessel, and on how to analyse the samples to determine compliance with ballast water discharge requ
18、irements, respectively.Although it is recognized that sampling of the actual tanks is possible through various methods, the primary concern for port and flag state officials is verification of the efficacy of the ballast water management system (BWMS) in preventing the unwanted discharge. The only t
19、rue way to measure what is being sent overboard in ballast water is to sample the ballast discharge as near as possible to the actual overboard.NOTE This part of ISO 11711 is written for sampling after the BWMS treatment, and prior to the discharge of ballast water, in order to assess the effectiven
20、ess of the BWMS. However, sample ports can also be installed elsewhere on a vessel for other purposes, such as experimental assessment of prototype BWMSs. In such cases, similar sample ports could also be installed prior to the treatment (ballast uptake side) in order to make a comparison between th
21、e ballast uptake and discharge. ISO 2013 All rights reserved vBS ISO 11711-1:2013BS ISO 11711-1:2013Ships and marine technology Piping and machinery Ballast water sampling and analysis Part 1: Discharge sampling port1 ScopeThis part of ISO 11711 provides guidance to shipboard personnel and other con
22、cerned parties on the materials, design, and installation of equipment used to take samples of treated ballast water from the ballast water discharge pipe onboard a vessel. The purpose of the sampling system is to enable the taking of a representative sample in order to verify that the ballast water
23、 management system (BWMS) is working as designed, i.e. the treatment is reducing the concentration of living organisms to levels established in discharge standards. The intent of the sampling installation is to provide a representative sample of the ballast water effluent with adequate pressure and
24、flow.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 14726, Ships and ma
25、rine technology Identification colours for the content of piping systemsISO 15614 (all parts), Specification and qualification of welding procedures for metallic materials Welding procedure test3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1bal
26、last waterwater with its suspended matter taken on board a ship to control trim, list, draught, stability or stresses of the ship3.2ballast water systemarrangement of pumps, piping and tanks on ships used to control vessel trim, draft and stabilityNote 1 to entry: Benefits of this system can include
27、 increased propeller immersion and improved steering. One disadvantage of ballast water systems is the potential dispersal of harmful aquatic organisms.3.3ballast water management systemBWMSequipment that processes ballast water such that the water discharged (the treated water) meets the specified
28、performance requirements for elimination of harmful aquatic organismsNote 1 to entry: The BWMS includes all associated control equipment, monitoring equipment, and sampling facilities.INTERNATIONAL STANDARD ISO 11711-1:2013(E) ISO 2013 All rights reserved 1BS ISO 11711-1:2013ISO 11711-1:2013(E)3.4sa
29、mpling pointplace in the ballast water piping where the sample is taken3.5sampling portequipment installed to take the sample3.6treatmentprocess or combination of mechanical, physical, or chemical methods to kill, remove or render infertile, harmful or potentially harmful organisms within ballast wa
30、ter4 Sampling port design4.1 ColourThe sampling port and any associated piping, particularly valve handles, shall be appropriately couloured green in accordance with ISO 14726 to indicate a sea water system.4.2 MaterialsIn order to prevent galvanic corrosion and potential leaking or flooding, the sa
31、mpling port flange, piping and valves should be constructed of the same or galvanically compatible material as the ballast water discharge piping and be mechanically suitable for potential long-term installation.4.3 Configuration of a semi-permanent sample portSamples shall be taken from the dischar
32、ge line as near to the point of discharge as practicable and the location of the sample port shall take this into consideration. The sample port shall incorporate a system similar to that shown in Figure 1. A one-valve configuration such as in Figure 1 may be used provided the sampling pipe end is f
33、itted with a removable pipe cap. As an alternative, a two-valve system may also be used, where the valve closest to the main ballast water discharge piping is designed to be either fully open (sampling mode) or fully closed. The second (sampling) valve should be a valve that does not cause organism
34、mortality, such as a diaphragm valve. A flanged configuration provides for easy removal of the sample pipe for cleaning, repair or replacement.Additional guidelines on sample port diameter sizing are contained in IMO Resolution MEPC.173(58) Annex, emphasizing the need for isokinetic (constant veloci
35、ty) sampling.The length of straight sample pipe (see Figure 1) facing into the flow can vary, but should not be less than one diameter of the sampling pipe. The radius of the pipe bend should be a minimum of 3 X diameter of sample pipe. The opening should face into the flow and be rounded at the edg
36、es to provide a smooth transition.The sample port should be located within the central half of the main pipe (within one-half the radius of the main pipe axis) to ensure the sample is obtained from the well developed portion of turbulent flow and is thus representative.2 ISO 2013 All rights reserved
37、BS ISO 11711-1:2013 ISO 11711-1:2013(E)Key1 ballast water discharge pipe 4 diaphragm valve2 direction of flow 5 pipe flange3 ballast water sample intake pipeaRounded edges.Figure 1 Sample port design (sample pipe centre-located within R/2 of main pipe axis)NOTE Dimensions and materials can vary depe
38、nding on design and materials of main ballast water discharge pipe. However, the shape of the sampling pipe should be curved as indicated in Figure 1 to provide the smoothest flow possible.4.3.1 Sample intake pipeIt is recommended that the sample intake pipe be standardized based on current or antic
39、ipated demands for ballast sample volumes and practical limits on such equipment. For example, if three tons of ballast water must be collected over a period of one hour, then the sampling port should support that demand.NOTE It is uncommon for ballasting rates to exceed 3,65 m/s (12 feet per second
40、), and possible for rates to reach near zero at the end of gravitating ballast.Sample port size should be based on the combination of maximum sample flow rate and minimum ballast flow rate that yields the largest isokinetic diameter. ISO 2013 All rights reserved 3BS ISO 11711-1:2013ISO 11711-1:2013(
41、E)Thus, sampling should be understood before sizing the sample tube. The isokinetic diameter should be determined as follows:Diso = Dm (Qiso / Qm) whereDiso, diameter of the sample port opening;Dm, diameter of the main discharge line;Qiso, volumetric flow through the sample port; andQm, volumetric f
42、low through the discharge line.The sample port diameter should be between 1,5 and 2 times the isokinetic diameter.Sample port size is determined as follows. Determine the sample flow rate (Qiso) based on requisite sample volume and duration of sample collection. Using the diameter of the main ballas
43、t discharge line (Dm) and minimum and maximum ballast flow rates (Qm), determine the isokinetic diameter (Diso) at requisite sample flow. Size the sample port according to the nearest available pipe size that is 1,5 to 2 x Diso.Table 1 provides example sample port sizing given a range of sample flow
44、s between 2,47 m3/h and 211,94 m3/h and typical ballast velocities between 1,21 m/s to 3,65 m/s. (See Table 1).Table 1 Example sample port size, ballast main velocity and sample flow rateBallast main velocity(m/s)Sample port size (in)0,75 1,00 1,25 1,50 2,00 2,50 3,00 3,50 4,00Sample port size (cm)1
45、,91 2,54 3,18 3,81 5,08 6,35 7,62 8,89 10,16Sample flow rate (m3/h)3,65 7,45 13,25 20,70 29,80 52,98 82,79 119,21 162,26 211,942,43 4,96 8,82 13,78 19,84 35,27 55,12 79,37 108,03 141,101,21 2,47 4,39 6,86 9,88 17,56 27,44 39,52 53,79 70,264.3.2 ValveIf flow control of the sample flow rate is require
46、d, ball, gate, and butterfly valve types shall be avoided as they may cause significant shear forces which may result in organism mortality. For flow control, diaphragm valves or similar valve types shall be used to minimize sharp velocity transitions. For flow distribution, ball valves may be utili
47、zed in such a manner that they are either fully open or closed.The valves shall be capped with a tamper proof seal that shall be broken only when sampling is performed by authorized persons.4.4 InstallationIn general, the sample port shall be installed after the treatment system and prior to overboa
48、rd discharge, in order to verify the effectiveness of the treatment and to best ascertain the condition of the ballast water that is being discharged overboard.Before any work is done to install sampling ports on existing ballast water discharge piping, the piping shall be certified isolated from sy
49、stem pressure and any potential ingress of water from the sea.4 ISO 2013 All rights reservedBS ISO 11711-1:2013ISO 11711-1:2013(E)4.4.1 Location of the sample port in the ballast systemSample ports should be installed in a section of the discharge pipe with as long a run of pipe as practicable, upstream and down, without elbows, tees or other fittings to avoid the negative effects of such fittings on flow conditions in the discharge line. Ideal sampling is from a long, straight vertical pipe section. In any case, co
