EN ISO 8384:2019

Ships and marine technology - Dredgers - Vocabulary (ISO 8384:2019)

This document specifies terms and definitions relating to dredgers, with the aim of giving clear enough definitions for every term for them to be understood by all specialists.
This document is applicable only to equipment which is used for the construction and maintenance of navigable waterways and the extraction of soil.
The terms specified in this document are intended to be used in documentation of all kinds. Certain standardized terms are also given with their abridged version; these can be used in cases where no possibility of misinterpretation can arise.
A combination of terms is allowed in application.

Schiffe und Meerestechnik - Schwimmbagger - Begriffe (ISO 8384:2019)

Dieses Dokument legt Begriffe in Bezug auf Schwimmbagger mit der Absicht fest, für jeden Begriff aus-reichend klare Definitionen zu liefern, damit diese von allen Spezialisten verstanden werden.
Dieses Dokument gilt lediglich für Geräte, die für die Konstruktion und Wartung von schiffbaren Wasser-straßen und die Extraktion von Boden verwendet werden.
Die in diesem Dokument festgelegten Begriffe sind für Dokumentationen jedweder Art vorgesehen. Be-stimmte genormte Begriffe werden außerdem in der gekürzten Version angegeben; diese können in den Fäl-len verwendet werden, in denen es zu keiner Fehlerinterpretation kommen kann.
Eine Kombination aus Begriffen ist in der Anwendung zulässig.

Navires et technologie maritime - Dragues - Vocabulaire (ISO 8384:2019)

Le présent document définit les termes et définitions relatifs aux dragues dans le but de donner des définitions suffisamment claires pour que chaque terme puisse être compris par tous les spécialistes.
Le présent document n'est applicable qu'aux équipements utilisés pour la construction et l'entretien des voies navigables et pour l'extraction du sol.
Les termes définis dans le présent document sont destinés aux documents de tous types. Certains termes normalisés sont aussi donnés avec leurs formes abrégées, qui peuvent être utilisées dans les cas où aucune confusion n'est possible.
Il est admis d'employer des combinaisons de termes pour des raisons pratiques.

Ladje in pomorska tehnologija - Plovni bagri - Slovar (ISO 8384:2019)

Ta dokument določa izraze in definicije v zvezi s plovnimi bagri za namene zagotavljanja ustreznega razumevanja posameznih izrazov, ki jih uporabljajo strokovnjaki. Ta dokument se navezuje samo na opremo, ki se uporablja za vzpostavitev in vzdrževanje plovnih poti ter izkopavanje zemlje. V tem dokumentu opredeljeni izrazi so predvideni za uporabo v različnih dokumentacijah. Nekateri standardizirani izrazi so podani tudi v skrajšani različici in se lahko uporabljajo v primerih brez možnosti napačne razlage. Primeri uporabe lahko vključujejo kombinacijo izrazov.

General Information

• Status: Published
• Publication Date: 30-Jan-2020
• Withdrawal Date: 29-Apr-2020
• ICS: 01.040.47 - Shipbuilding and marine structures (Vocabularies)
• ICS: 47.060 - Inland navigation vessels
• Technical Committee: CEN/TC 15 - Inland navigation vessels
• Drafting Committee: CEN/TC 15 - Inland navigation vessels
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 02-Oct-2019
• Completion Date: 02-Oct-2019
• Ref Project: SIST EN ISO 8384:2019 - Ships and marine technology - Dredgers - Vocabulary (ISO 8384:2019)

Relations

• Replaces: EN ISO 8384:2018 - Ships and marine technology - Dredgers - Vocabulary (ISO 8384:2018)
• Effective Date: 09-Oct-2019

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 8384:2019
01-december-2019
Nadomešča:
SIST EN ISO 8384:2018
Ladje in pomorska tehnologija - Plovni bagri - Slovar (ISO 8384:2019)
Ships and marine technology - Dredgers - Vocabulary (ISO 8384:2019)
Schiffe und Meerestechnik - Schwimmbagger - Begriffe (ISO 8384:2019)
Navires et technologie maritime - Dragues - Vocabulaire (ISO 8384:2019)
Ta slovenski standard je istoveten z: EN ISO 8384:2019
ICS:
01.040.47 Ladjedelništvo in konstrukcije Shipbuilding and marine
na morju (Slovarji) structures (Vocabularies)
47.020.40 Dvigalna oprema in oprema Lifting and cargo handling
za pretovor equipment
SIST EN ISO 8384:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 8384:2019
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SIST EN ISO 8384:2019
EN ISO 8384
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 01.040.47; 47.060 Supersedes EN ISO 8384:2018
English Version
Ships and marine technology - Dredgers - Vocabulary (ISO
8384:2019)

Navires et technologie maritime - Dragues - Schiffe und Meerestechnik - Schwimmbagger - Begriffe

Vocabulaire (ISO 8384:2019) (ISO 8384:2019)
This European Standard was approved by CEN on 12 August 2019.

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 CEN-CENELEC 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 CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8384:2019 E

worldwide for CEN national Members.
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SIST EN ISO 8384:2019
EN ISO 8384:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 8384:2019
EN ISO 8384:2019 (E)
European foreword

This document (EN ISO 8384:2019) has been prepared by Technical Committee ISO/TC 8 "Ships and

marine technology" in collaboration with Technical Committee CEN/TC 15 “Inland navigation vessels”

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 April 2020, and conflicting national standards shall be

withdrawn at the latest by April 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 8384:2018.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 8384:2019 has been approved by CEN as EN ISO 8384:2019 without any modification.

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SIST EN ISO 8384:2019
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SIST EN ISO 8384:2019
INTERNATIONAL ISO
STANDARD 8384
Fourth edition
2019-08
Ships and marine technology —
Dredgers — Vocabulary
Navires et technologie maritime — Dragues — Vocabulaire
Reference number
ISO 8384:2019(E)
ISO 2019
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including 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 ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
Contents Page

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

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

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

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

3.1 Terms relating to general concepts applicable to dredgers ............................................................................. 1

3.2 Terms relating to basic parameters of dredgers ........................................................................................................ 2

3.3 Terms relating to types of dredgers ...................................................................................................................................... 4

3.3.1 Types of dredgers depending on methods of soil extraction or treatment ................... 4

3.3.2 Types of dredgers defined by power plant ............................................................................................... 6

3.3.3 Types of dredgers defined by their propulsion or manoeuvrability ................................... 7

3.3.4 Types of dredgers defined by way of assembly ..................................................................................... 7

3.4 Terms relating to methods and equipment for removal of soil ..................................................................... 7

3.5 Terms relating to methods and equipment for operating movements ...............................................10

3.6 Terms relating to dredging pump unit and to soil-loosening equipment .........................................11

3.7 Terms relating to controls and to monitoring and measuring instruments ...................................14

3.8 Terms relating to special types of dredgers ................................................................................................................16

3.8.1 Terms relating to bucket chain dredger and to bucket assembly .......................................16

3.8.2 Terms relating to trailing suction hopper dredger and its dredging equipment ..18

3.8.3 Terms relating to cutter suction dredger and its dredging equipment .........................19

3.8.4 Terms relating to grab/dipper/backhoe dredger and their dredging

equipment .................. ......................................................................................................................... ................................21

© ISO 2019 – All rights reserved iii
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SIST EN ISO 8384:2019
ISO 8384:2019(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.

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 of the voluntary nature of standards, 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 www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 7, Inland navigation vessels.

This fourth edition cancels and replaces the third edition (ISO 8384:2018), of which it constitutes a

minor revision.
The changes compared to the previous edition are as follows:
— a note for "seabed" was added,
— references were corrected,
— delivery pipeline was clarified,

— wording was improved for entries such as, e.g. 3.4.34, 3.7.5, 3.7.12, 3.7.29, and

— a note was added for swing winches.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 8384:2019
INTERNATIONAL STANDARD ISO 8384:2019(E)
Ships and marine technology — Dredgers — Vocabulary
1 Scope

This document specifies terms and definitions relating to dredgers, with the aim of giving clear enough

definitions for every term for them to be understood by all specialists.

This document is applicable only to equipment which is used for the construction and maintenance of

navigable waterways and the extraction of soil.

The terms specified in this document are intended to be used in documentation of all kinds. Certain

standardized terms are also given with their abridged version; these can be used in cases where no

possibility of misinterpretation can arise.
A combination of terms is allowed in application.
2 Normative references
There are no normative references in this document.
3 Terms and definitions

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
3.1 Terms relating to general concepts applicable to dredgers
3.1.1
dredging
loosening, collecting, transporting and disposing of dredged mixture (3.6.1)
3.1.2
hopper loading

process of the dredged mixture (3.6.1) filled into the hopper hold (3.4.18) of the hopper barge (3.4.13) or

hopper dredger (3.3.1.1.1)
3.1.3
soil
seabed material, which may contain sludge, sand, rocks and other material

Note 1 to entry: In this term, “seabed” means the bottom of a river, channel, lake or ocean.

3.1.4
dredging site

geographical site where excavation or extraction of the soil (3.1.3) is carried out

3.1.5
dredger
vessel or piece of equipment intended for dredging (3.1.1)
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.1.6
dredging unit

dredger (3.1.5) and its service vessels, which is used for extraction, transportation and disposal of soil

(3.1.3) for dredging (3.1.1)
3.1.7
dredging fleet

composition of related dredging units (3.1.6) for the accomplishment of dredging (3.1.1)

3.1.8
dredging equipment

devices, installation and systems of a dredger (3.1.5) for the accomplishment of dredging (3.1.1)

3.1.9
dredging apparatus

equipment, installation or tool for excavating the soil (3.1.3), separating it from the bottom of water and

raising it
3.1.10
gantry
rigid steel structure used to suspend or support the dredging equipment (3.1.8)
3.1.11
soil discharge installation
installation for discharging the soil (3.1.3) from the dredger (3.1.5)
3.1.12
spud installation

equipment comprising spuds (3.5.4) and mechanisms for hoisting, lowering, locating and fixing the

spuds (3.5.4)
3.1.13
swell compensator

device ensuring a dredger's (3.1.5) operation to cope with waves and uneven seabed at the dredging

site (3.1.4)
3.2 Terms relating to basic parameters of dredgers
3.2.1
total installed power

sum of the power of all the prime movers (3.3.2.1) installed in a dredger (3.1.5)

3.2.2
dredging output

volume/mass of soil (3.1.3) extracted by a dredger (3.1.5) per unit of time or per vessel

3.2.3
dredging production

accumulated quantity of the soil (3.1.3) dredged by a dredger (3.1.5) in a period of time

3.2.4
sailing speed
dredger (3.1.5) speed over ground at full load draught during free sailing
3.2.5
dredging speed
dredger (3.1.5) speed over ground during dredging (3.1.1)
2 © ISO 2019 – All rights reserved
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.2.6
dredging depth

vertical distance from the water surface to the lower edge of the dredging equipment (3.1.8) of the

dredger (3.1.5) which is operating
3.2.7
maximum dredging depth
maximum depth at which a dredger (3.1.5) can operate
3.2.8
minimum dredging depth
minimum depth at which a dredger (3.1.5) can operate
3.2.9
discharge distance

straight line distance from the outlet of the dredge pump (3.6.2) to the outlet of the delivery pipeline (3.4.4)

3.2.10
hopper hold capacity

maximum volume of the hopper hold (3.4.18) of a dredger (3.1.5) with a hopper hold (3.4.18) or a hopper

barge (3.4.13)
3.2.11
effective hopper hold capacity

volume of dredged material that can be placed and retained in the hopper holds (3.4.18) of a hopper

barge (3.4.13) or a hopper dredger (3.3.1.1.1)
3.2.12
hopper content density

mass per unit of volume of the dredged mixture (3.6.1) dredged and filled in the hopper hold (3.4.18)

3.2.13
hopper solid content

volume of dry soil (3.1.3) loaded in the hopper hold (3.4.18) at the full load draught of the hopper dredger

(3.3.1.1.1) or hopper barge (3.4.13)
3.2.14
hopper load

mass of the dredged mixture (3.6.1) loaded in the hopper hold (3.4.18) at full load draught of a hopper

dredger (3.3.1.1.1) or hopper barge (3.4.13)
3.2.15
hopper loading time

time needed for the filling of the dredged mixture (3.6.1) into the hopper hold (3.4.18) up to full load

draught of a dredger (3.1.5)
3.2.16
transportation distance

distance from dredging site (3.1.4) to disposal area, when the dredged material is transported by a

hopper dredger (3.3.1.1.1) or hopper barge (3.4.13)
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.3 Terms relating to types of dredgers
3.3.1 Types of dredgers depending on methods of soil extraction or treatment
3.3.1.1 Hydraulic suction dredgers
3.3.1.1.1
hopper dredger
self-propelled dredger (3.3.3.1) with its own integrated hopper hold (3.4.18)

Note 1 to entry: Hopper dredger can be trailing suction hopper dredger or grab hopper dredger.

3.3.1.1.2
plain suction dredger

dredger (3.1.5) using suction mouth (3.4.30) only and dredge pump(s) (3.6.2) for extracting and

discharging the dredged mixture (3.6.1) through pipelines
3.3.1.1.3
cutter suction dredger

dredger (3.1.5) which uses cutter head (3.8.3.14) and dredge pump(s) (3.6.2) for excavating, extracting

different kinds of soil (3.1.3) and discharging the dredged mixture (3.6.1) through pipelines

Note 1 to entry: Cutter suction dredgers can be non-propelled or self-propelled.
3.3.1.1.4
bucket/cutting wheel suction dredger

cutter suction dredger (3.3.1.1.3) that excavates soil (3.1.3) with a bucket wheel (3.8.3.16) or cutting

wheel (3.8.3.17)
3.3.1.1.5
trailing suction hopper dredger

self-propelled dredger (3.3.3.1), which trails the draghead (3.8.2.4) on the ground to excavate, extract

and fill the soil (3.1.3) into its own integrated hopper with dredge pump(s) (3.6.2)

3.3.1.1.6
split trailing suction hopper dredger

trailing suction hopper dredger (3.3.1.1.5) with a hull that can be opened along the longitudinal axis of

the vessel to dump the dredged mixture (3.6.1) from the hopper hold (3.4.18)
3.3.1.1.7
trailing suction side‑casting dredger

trailing suction hopper dredger (3.3.1.1.5) equipped with the side casting installation (3.4.36) for

pumping the dredged mixture (3.6.1) over board directly
3.3.1.1.8
dustpan suction dredger

kind of plain suction dredger (3.3.1.1.2) which is equipped with a prolate box type suction mouth (3.4.30)

with jet water (3.6.26) nozzle fitted in the front of the suction mouth (3.4.30)
3.3.1.1.9
deep suction dredger

dredger (3.1.5) having a long suction pipe equipped with a submersible dredge pump (3.6.4)

Note 1 to entry: Normally the dredging depth (3.2.6) of a deep suction dredger exceeds 30 m.

3.3.1.1.10
barge unloading suction dredger

kind of plain suction dredger (3.3.1.1.2) which extracts and pumps the dredged mixture (3.6.1) out of the

hopper hold (3.4.18) to the shore with dredge pump (3.6.2) and suction pipe which is able to stick out

and lower into the hopper hold (3.4.18) of the hopper barge
4 © ISO 2019 – All rights reserved
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.3.1.1.11
auger suction dredger

dustpan suction dredger (3.3.1.1.8) with a rotary auger installed in the dustpan (3.6.8), the movement of

which is a combination of moving ahead automatically plus swinging from right to left

3.3.1.1.12
jet ejector dredger

dredger (3.1.5) using pressure water for loosening, extracting and transporting the dredged mixture

(3.6.1)
3.3.1.1.13
air‑lift dredger

dredger (3.1.5) using air-lift pump (3.6.23) unit for collecting and transporting the dredged mixture (3.6.1)

3.3.1.2 Mechanical excavating dredgers
3.3.1.2.1
bucket chain dredger

dredger (3.1.5) equipped with serial buckets forming a bucket chain moving along the bucket ladder

(3.8.1.16), excavating the soil (3.1.3) underwater and loading into the alongside hopper barge (3.4.13)

through a chute (3.8.1.17)
3.3.1.2.2
dipper dredger

dredger (3.1.5) with a single bucket (3.8.1.3) on an arm which moves away from the dredger (3.1.5)

while the bucket (3.8.1.3) excavates the soil (3.1.3)
3.3.1.2.3
backhoe dredger

dredger (3.1.5) with a single bucket (3.8.1.3) on an arm which moves towards the dredger (3.1.5) while

the bucket (3.8.1.3) excavates the soil (3.1.3)
3.3.1.2.4
grab dredger

dredger (3.1.5) which excavates the soil (3.1.3) with one or more grabs (3.8.4.13)

3.3.1.2.5
dragline dredger

dredger (3.1.5) which excavates the soil (3.1.3) with a single bucket moved by dragline

3.3.1.2.6
rock‑breaker

dredger (3.1.5) or other unit fitted with equipment for crushing and fragmenting rock under the water

as a pre-treatment for dredging (3.1.1)
3.3.1.2.7
rock‑breaker with freely falling chisel
rock-breaker (3.3.1.2.6) with a chisel which falls under gravity only
3.3.1.2.8
rock‑breaker with powered chisel
rock-breaker (3.3.1.2.6) with a chisel activated by a power source
3.3.1.2.9
rock‑drilling and blasting vessel

vessel for drilling rocks under water and placing explosives into the drilling hole to smash the rocks

into fragments
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.3.1.2.10
agitation dredger

vessel used for dredging (3.1.1) by loosening the soil (3.1.3) which is then washed away by the current in

the basin so that loosened, suspended material is taken away by the current and settled in deeper areas

3.3.1.2.11
bed leveller
vessel used to level the seabed at the dredging site (3.1.4)
3.3.1.2.12
self‑unloading bucket chain dredger

dredger (3.1.5) which uses the chained buckets to excavate the soil (3.1.3) underwater and dilutes the

dredged material into dredged mixture (3.6.1) and pumps it out through the discharge pipeline (3.4.2).

Note 1 to entry: A self-unloading bucket chain dredger is an obsolete type of dredger.

3.3.2 Types of dredgers defined by power plant
3.3.2.1
prime mover

engine that produces the power to dredging equipment (3.1.8) for dredging (3.1.1) and discharging the

dredged mixture (3.6.1), and to other consumers
3.3.2.2
diesel dredger
dredger (3.1.5) using diesel engine(s) as a prime mover (3.3.2.1)
3.3.2.3
dual‑fuel dredger
dredger (3.1.5) using a dual-fuel engine as a prime mover (3.3.2.1)
3.3.2.4
diesel‑electric dredger

dredger (3.1.5) using diesel engine(s) as prime mover(s) (3.3.2.1) driving electric generators to supply

all the electric motors driving dredging equipment (3.1.8) and propulsion machinery where applicable

3.3.2.5
diesel‑hydraulic dredger

dredger (3.1.5) using diesel engine(s) as prime mover(s) (3.3.2.1) to drive hydraulic pumps supplying all

hydraulic motors which driving dredging equipment (3.1.8) and propulsion machinery where applicable

3.3.2.6
steam dredger

dredger (3.1.5) using a steam turbine or steam reciprocating engine as a prime mover (3.3.2.1)

Note 1 to entry: Steam dredgers are obsolete types of dredgers.
3.3.2.7
gas‑turbine dredger
dredger (3.1.5) using a gas turbine as a prime mover (3.3.2.1)
3.3.2.8
electric dredger

dredger (3.1.5) using an electric power plant as a prime mover (3.3.2.1) or fed from external electric supply

3.3.2.9
electric‑hydraulic dredger

dredger (3.1.5) using external electric supply to power electric motors which drive hydraulic pumps for

hydraulic power transmission of the dredging equipment (3.1.8)
6 © ISO 2019 – All rights reserved
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.3.3 Types of dredgers defined by their propulsion or manoeuvrability
3.3.3.1
self‑propelled dredger
dredger (3.1.5) having propelling devices to allow independent movement
3.3.3.2
non‑self‑propelled dredger
dredger (3.1.5) without propelling devices
3.3.3.3
self‑manoeuvrable dredger

non-self-propelled dredger (3.3.3.2) equipped with propulsor(s) for positioning at the dredging site (3.1.4)

3.3.4 Types of dredgers defined by way of assembly
3.3.4.1
non‑dismountable dredger
dredger (3.1.5) readily assembled on the shipyard for full service use
3.3.4.2
partly dismountable dredger

dredger (3.1.5) partly assembled on the shipyard for final assembly at the place of operation

3.3.4.3
dismountable dredger

dredger (3.1.5) consisting of a number of pontoons with engine and dredging equipment (3.1.8) that can

be assembled with bolts and hooks to form a complete dredger
3.4 Terms relating to methods and equipment for removal of soil
3.4.1
suction pipeline

pipeline through which the dredged mixture (3.6.1) passes from the suction head (3.6.7) to the inlet of

dredge pump (3.6.2)
3.4.2
discharge pipeline

pipeline through which the dredged mixture (3.6.1) is transported from the outlet of the dredge pump

(3.6.2) to the outlet of the delivery pipeline (3.4.4)
3.4.3
discharge pipeline on board

part of the discharge pipeline (3.4.2) located on the discharge side of the dredge pump (3.6.2), inside or

on the hull of the dredger (3.1.5)
3.4.4
delivery pipeline

pipeline through which the dredged mixture (3.6.1) is transported from the aft end of the dredger (3.1.5)

to the outlet of the pipeline
3.4.5
floating delivery pipeline

part of the delivery pipeline (3.4.4) which crosses the water and is supported either by its own inbuilt

buoyancy or by use of pipeline pontoons (3.4.8) or pipeline floaters (3.4.9)
3.4.6
self‑floating pipeline

pipeline covered by floatable material and protecting layer, which can float in the water without any

other floater
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SIST EN ISO 8384:2019
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3.4.7
submersible pipeline
part of the delivery pipeline (3.4.4) which is laid down under water
3.4.8
pipeline pontoon
small barge for supporting a floating delivery pipeline (3.4.5)
3.4.9
pipeline floater
equipment for supporting a floating delivery pipeline (3.4.5)

Note 1 to entry: A typical design of a pipeline floater is a construction of two round barrels connected with steel

members.
3.4.10
diffuser

device placed on the end of a discharge pipeline (3.4.2) to reduce the velocity of the dredged mixture

(3.6.1) at the disposal site
3.4.11
discharge orifice

tapered nozzle located at the end of the delivery pipeline (3.4.4) to reduce the flowrate of the dredged

mixture (3.6.1)
3.4.12
bow coupling unit

installation comprised of a steel frame for supporting the delivery pipeline (3.4.4), ball joint connector

and winch, used for pumping ashore
3.4.13
hopper barge

special kind of vessel, self-propelled, towed or pushed, for the transportation of the soil (3.1.3) extracted

by dredging (3.1.1)
3.4.14
split hopper barge

hopper barge (3.4.13) which can be opened along the full length of the vessel to dump the dredged

material from the hopper hold (3.4.18)
Note 1 to entry: Split hopper barge can be self-propelled or non-self-propelled.
3.4.15
soil transportation by hopper barge

transportation of the soil (3.1.3) extracted by dredging (3.1.1), carried out by hopper barge (3.4.13)

3.4.16
conveyor
moving belt for the disposal of the soil (3.1.3) extracted by dredging (3.1.1)
3.4.17
soil transportation with conveyor

transportation of the soil (3.1.3) extracted by dredging (3.1.1) with removal conveyors (3.4.16) of

sufficient length to the place of discharge
3.4.18
hopper hold

compartment of a hopper dredger (3.3.1.1.1) or hopper barge (3.4.13) used to contain and transport the

dredged mixture (3.6.1) during dredging (3.1.1) in the dredging site (3.1.4)
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SIST EN ISO 8384:2019
ISO 8384:2019(E)
3.4.19
overflow arrangement

arrangement to remove the light dredged mixture (3.6.1) to increase the density of the dredged mixture

(3.6.1) in the hopper hold (3.4.18)
3.4.20
bottom discharge opening

opening in the bottom of the hull of a hopper dredger (3.3.1.1.1) or a hopper barge (3.4.13) for disposal of

the dredged mixture (3.6.1) via either bottom doors (3.4.21) or valves
3.4.21
bottom door

device mounted at the bottom discharge openings (3.4.20) for dumping the dredged mixture (3.6.1) out of

the hopper hold (3.4.18)

Note 1 to entry: Bottom door is a general term for types of bottom doors such as box bottom door, conical bottom

valve, etc.
3.4.22
box bottom door

box shaped bottom door (3.4.21), equipped with an actuating mechanism for opening and closing the

door for disposal of the soil (3.1.3)
3.4.23
conical bottom valve

kind of bottom door consisting of a valve installed at a circular opening frame in the bottom of a hopper

hold (3.4.18) for disposal of the dredged mixture (3.6.1)

Note 1 to entry: A conical bottom valve consists of a conical valve disc and a valve rod and it is driven usually by

a hydraulic cylinder.
3.4.24
door‑operating device

device for opening, closing and securing the bottom doors (3.4.21) covering bottom discharge openings

(3.4.20)
3.4.25
rock collector

device for separating rocks from the dredged mixture (3.6.1) on the suction side of the dredge pump (3.6.2)

3.4.26
screen

device to separate the various grain sizes of the solid material out of the dredged mixture (3.6.1)

3.4.27
hopper chute
device to direct the soil (3.1.3) onto the conveyors (3.4.16)
3.4.28
dredged mixture separator
device for separating water from the dredged mixture (3.6.1)
3.4.29
pipeline swivel joint
hinged or flexible joint of separate elements of the pipeline
3.4.30
suction mouth
...