ISO/DIS 19738

Ships and marine technology -- Aquatic nuisance species -- In-line fluid sampling method for obtaining representative samples of water systems

Navires et technologie maritime -- Méthode de prélèvement direct pour obtenir des échantillons représentatifs des systèmes d'eau

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 19738
ISO/TC 8 Secretariat: SAC
Voting begins on: Voting terminates on:
2018-03-08 2018-05-31
Ships and marine technology — Aquatic nuisance species
— In-line sampling method for obtaining representative
samples of water systems

Navires et technologie maritime — Méthode de prélèvement direct pour obtenir des échantillons

représentatifs des systèmes d'eau
ICS: 47.020.99
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NATIONAL REGULATIONS.
ISO/DIS 19738:2018(E)
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ISO/DIS 19738:2018(E)
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ISO/DIS 19738:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Sampling location ................................................................................................................................................................................................ 1

4.1 Types of pipeline ................................................................................................................................................................................... 2

4.2 Computing method of sampling location ......................................................................................................................... 2

5 Installation of the straightener ............................................................................................................................................................. 4

5.1 Types of straighteners ...................................................................................................................................................................... 4

5.1.1 Grid straightener.............................................................................................................................................................. 4

5.1.2 Other straightener types ........................................................................................................................................... 5

5.2 Safety considerations ........................................................................................................................................................................ 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2018 – All rights reserved iii
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ISO/DIS 19738:2018(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

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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

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 (see www.iso.org/directives).

Attention is drawn to 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 ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,

as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the

Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.

The committee responsible for this document is ISO/ TC 8 Ships and marine technology/ WG 12 Aquatic

nuisance species.
iv © ISO 2018 – All rights reserved
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ISO/DIS 19738:2018(E)
Introduction

A fully developed flow of ballast water in a ship's discharge piping is needed in order to obtain samples

that represent the discharge. Fluid dynamics dictates that for different pipeline shapes and diameters,

a specified length of straight pipeline is needed in order to obtain this flow prior to the ship's sampling

port. Due to engine room configurations, footprints, and layout, required lengths of straight pipeline

are not always available. The use of a straightener can overcome these limitations. This standard

provides guidance on the straightener.
© ISO 2018 – All rights reserved v
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DRAFT INTERNATIONAL STANDARD ISO/DIS 19738:2018(E)
Ships and marine technology — Aquatic nuisance species
— In-line sampling method for obtaining representative
samples of water systems
1 Scope

This document provides guidance to port state control, surveyors, manufacturers and stakeholders on

the types and installation of a straightener in the ballast water discharge piping. The straightener will

enable a true representation of the whole fluid in the pipeline prior to the ship's sampling port.

2 Normative references

The 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 11711-1, Ships and marine technology – Aquatic nuisance species – Part 1: Ballast water discharge

sampling port

Resolution MEPC 279(70), Guidelines for approval of ballast water management systems (G8)

Resolution MEPC 173(58), Guidelines for ballast water sampling (G2)
3 Terms and definitions
For the purposes of this document, the following terms and definition
...