Ships and marine technology — Launching appliances for davit-launched liferafts

ISO 13122:2011 specifies requirements for the performance, design, construction, operation, safety, inspection, maintenance, and testing and acceptance of launching appliances for davit-launched liferafts installed on a variety of sea-going ships.

Navires et technologie maritime — Engins de mise à l'eau des radeaux de sauvetage sous bossoirs

General Information

Status
Published
Publication Date
09-Aug-2011
Current Stage
9093 - International Standard confirmed
Start Date
22-Oct-2018
Completion Date
22-Oct-2018
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ISO 13122:2011 - Ships and marine technology -- Launching appliances for davit-launched liferafts
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INTERNATIONAL ISO
STANDARD 13122
First edition
2011-08-15
Ships and marine technology — Launching
appliances for davit-launched liferafts
Navires et technologie maritime — Engins de mise à l’eau des radeaux
de sauvetage sous bossoirs
Reference number
ISO 13122:2011(E)
ISO 2011
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ISO 13122:2011(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2011

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s

member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved
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ISO 13122:2011(E)
Contents Page

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

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

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

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

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

4 Performance ......................................................................................................................................................... 2

5 Design ..................................................................................................................................................................... 3

6 Construction ......................................................................................................................................................... 4

6.1 General ................................................................................................................................................................... 4

6.2 Loose gears .......................................................................................................................................................... 4

6.3 Davit ........................................................................................................................................................................ 4

6.4 Turning device ...................................................................................................................................................... 4

6.5 Winch ...................................................................................................................................................................... 5

6.6 Automatic release hook ..................................................................................................................................... 5

7 Operation and safety .......................................................................................................................................... 6

8 Inspection and maintenance ............................................................................................................................ 6

9 Test methods ........................................................................................................................................................ 7

9.1 General ................................................................................................................................................................... 7

9.2 Loose gears .......................................................................................................................................................... 7

9.3 Winch ...................................................................................................................................................................... 7

9.4 Launching appliances ........................................................................................................................................ 8

10 Acceptance code ................................................................................................................................................. 9

10.1 Prototype testing ................................................................................................................................................. 9

10.2 Production testing .............................................................................................................................................10

11 Marking .................................................................................................................................................................10

© ISO 2011 – All rights reserved iii
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ISO 13122:2011(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 2.

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 document may be the subject of patent

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

ISO 13122 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee

SC 4, Outfitting and deck machinery.
iv © ISO 2011 – All rights reserved
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ISO 13122:2011(E)
Introduction

This International Standard forms a code of practical interpretation and amplification of the requirements of

the International Convention for the Safety of Life at Sea (SOLAS). It provides an identical basis for design,

construction and acceptance of launching appliances for davit-launched liferafts for use by ship-owners,

shipbuilders and appropriate organizations.

Automatic release hooks are usually considered as independent equipment for statutory survey and have to obtain

type approval and undergo acceptance testing by the authorities or their delegates. There are special requirements

for their design, construction and acceptance testing stipulated by the IMO (International Maritime Organization). It

is therefore intended that an International Standard specific to the automatic hook be drafted separately.

This International Standard is mainly based on amendments to SOLAS 1974, dating from 1983 to 1996, and related

IMO resolutions and protocols, in particular Resolutions MSC.47(66), MSC.48(66), MSC.81(70), MSC.216(82),

1) 2)

MSC.218(82) and MSC.226(82). It also refers to IMO circulars MSC/Circ.1205 and MSC/Circ.1206 .

1) Guidelines for Developing Operation and Maintenance Manuals for Lifeboat Systems.

2) Measures to Prevent Accidents with Lifeboats.
© ISO 2011 – All rights reserved v
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INTERNATIONAL STANDARD ISO 13122:2011(E)
Ships and marine technology — Launching appliances for
davit-launched liferafts
1 Scope

This International Standard specifies requirements for the performance, design, construction, operation, safety,

inspection, maintenance, and testing and acceptance of launching appliances for davit-launched liferafts

(hereinafter referred to as “liferafts”) installed on a variety of sea-going ships.

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 15516, Ships and marine technology — Launching appliances for davit-launched lifeboats

ISO 2944, Fluid power systems and components — Nominal pressures

ISO 4413, Hydraulic fluid power — General rules and safety requirements for systems and their components

ISO 4414, Pneumatic fluid power — General rules and safety requirements for systems and their components

IEC 60092 (all parts), Electrical installations in ships
IEC 60529, Degrees of protection provided by enclosures (IP Code)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 15516 and the following apply.

3.1
non-loaded liferaft
liferaft fully equipped without persons
3.2
fully loaded liferaft
liferaft fully equipped and loaded with a full complement of persons
NOTE The mass of each person is taken as being 82,5 kg.
3.3
maximum working load

load assigned by the design applied to the release hook of a launching appliance during launching of the

maximum weight of the fully loaded liferaft it serves
3.4
recovering load

load assigned by the design applied to the release hook of a launching appliance during recovering of the

maximum weight of the non-loaded liferaft it serves
3.5
maximum working load of winch

maximum load assigned by the design held by the falls at the winch drum when the launching appliance is

launching or recovering the maximum working load
© ISO 2011 – All rights reserved 1
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ISO 13122:2011(E)
3.6
hoisting load of winch

load assigned by the design held by the falls at the winch drum when the launching appliance is hoisting the

recovering load
3.7
davit

major structure of the launching appliance, generally composed of frame, davit arm and fittings, etc.

3.8
winch

mechanism of the launching appliance used for launching and recovering the liferaft

3.9
turning device

device of the launching appliance used for slewing or swinging the davit arm so as to bring the liferaft from

inboard to outboard or vice versa
3.10
automatic release hook

hook used for suspending the liferaft with the function of lowering and automatically releasing the liferaft

when waterborne
4 Performance

4.1 A launching appliance shall depend only on manpower, gravity or stored mechanical power that is

independent of the ship’s power supplies to safely turn out the non-loaded liferaft it serves from inboard to full

outboard, ready for embarking and lowering the liferaft with the ship against a trim of up to 10° and list of up to

20° either way.

4.2 A launching appliance shall not depend on any means other than gravity or stored mechanical power

independent of the ship’s power supplies to lower the liferaft it serves with the ship against a trim of up to 10°

and list of up to 20° either way.

4.3 A launching appliance shall be capable of safely lowering the liferaft in a controlled manner, and the

speed at which the liferaft is lowered to the water shall conform to Table 1.

4.4 The loose gears and automatic release hook shall have sufficient total weight to overcome the friction

in the davit reeving system, so as to lower freely the non-loaded release hook (referred to hereinafter as

“non-loaded hook”).

4.5 A launching appliance shall be capable of manually recovering a non-loaded liferaft from the water to the

deck with the ship on an approximately even keel.

4.6 Where a launching appliance serves to launch several liferafts, a manually operated means for the rapid

recovery of the non-loaded hook shall be provided; it shall be ensured that all the liferafts it serves capable of

being lowered are brought to the water within 30 min for a passenger ship or 10 min for a cargo ship.

In order to quickly bring the non-loaded hook to the next liferaft, the launching appliance shall be provided

additionally with a recovery pulling line.
2 © ISO 2011 – All rights reserved
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ISO 13122:2011(E)
Table 1 — Liferaft lowering speed
Condition of Lowering speed
Limit
liferaft S
S = 0,4 + 0,02H
where
S is the lowering speed in metres per second (m/s);

Lower limit H is the height in metres from the davit head to the waterline with the ship

Fully loaded liferaft
at the lightest seagoing condition, without consideration of trim and list given
in 4.1, and with the davit arm in the full outboard position.
Regardless of the values obtained using this equation, the maximum values shall
not exceed 1 m/s, unless otherwise stipulated by the relevant authority.
Upper limit 1,3 m/s, unless otherwise stipulated by the relevant authority

Non-loaded liferaft Lower limit 0,1 m/s, unless otherwise stipulated by the relevant authority

5 Design

5.1 A launching appliance shall be constructed using materials that will not be damaged in stowage throughout

an air temperature range of −30 °C to +65 °C.

5.2 All materials exposed to weather shall possess excellent resistance to corrosion and deterioration, or

shall be protected by galvanizing or other effective means.

5.3 The major structural components, such as davit arm, frame and sheave block, shall be made from

materials such as steel plates, tubes or profiled bar that meet the requirements for seagoing conditions and

have satisfactory weldability. Their minimum thickness shall be not less than 6 mm, unless they are of stainless

materials with sea-water corrosion resistance.

5.4 Loose gears such as lifting chains, shackles and eye plates shall be made of ductile materials; grey iron

castings shall not be used.

5.5 A launching appliance shall be designed to have the minimum safety factors in accordance with Table 2,

on the basis of the maximum load applied to those major parts and corresponding to the ultimate strength of

their materials.
Table 2 — Minimum safety factors
Launching appliance parts Minimum safety factor
Loose gears, falls, release hook 6
Davit arm, frame and their fittings 4,5
Winch, turning device 4,5
5.6 A launching appliance shall remain effective under the condition of icing.

5.7 Launching appliances shall be constructed so as to reduce routine maintenance to a minimum. All parts

requiring regular maintenance shall be readily accessible and easily maintained by the ship’s crew.

© ISO 2011 – All rights reserved 3
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ISO 13122:2011(E)
6 Construction
6.1 General

A launching appliance generally consists of loose gears, davit, turning gear, winch and automatic release

hook, etc. It may be specifically designed for launching and recovering the liferaft, or as a combined launching

appliance for multi-purpose functions, as long as those functions do not interfere with each other. Whatever

the design, all relevant requirements for launching or recovering the liferaft are to be met by the launching

appliance for conformance with this International Standard.
Launching appliances shall be ready for immediate use at all times.
6.2 Loose gears

6.2.1 The falls used for hoisting and lowering the liferaft shall be rotation-resistant and of galvanized steel wire

rope or others having high resistance to corrosion.

6.2.2 Falls shall be long enough so that at least three dead turns of rope remain on the winch’s drum after the

liferaft has been successfully lowered to the water, with the ship in its lightest seagoing condition and under the

unfavourable conditions of a trim
...

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