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ISO 2011All rights reserved

Document type: International Standard

Document subtype:Document stage: (20) PreparatoryDocument language: E

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ISO TC 8/SC 8 N 169

Date: 2011-11-18

ISO/WD

ISO TC 8/SC 8/WG

Secretariat: KATS

Ships and marine technologyOil-tight hatch covers

lment introductiflment centrallment complmentaire

Warning

This document is not an ISO International Standard. It is distributed for review and comment. It is subject tochange without notice and may not be referred to as an International Standard.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights ofwhich they are aware and to provide supporting documentation.

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ii ISO 2011All rights reserved

Copyright notice

This ISO document is a working draft or committee draft and is copyright-protected by ISO. While thereproduction of working drafts or committee drafts in any form for use by participants in the ISO standardsdevelopment process is permitted without prior permission from ISO, neither this document nor any extractfrom it may be reproduced, stored or transmitted in any form for any other purpose without prior writtenpermission from ISO.

Requests for permission to reproduce this document for the purpose of selling it should be addressed asshown below or to ISO's member body in the country of the requester:

[Indicate the full address, telephone number, fax number, telex number, and electronic mail address, asappropriate, of the Copyright Manger of the ISO member body responsible for the secretariat of the TC orSC within the framework of which the working document has been prepared.]

Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.

Violators may be prosecuted.

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ISO 2011All rights reserved iii

Contents Page

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

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

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

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

3 Classification ......................................................................................................................................... 13.1 Classification ......................................................................................................................................... 13.2 Constructions and basic sizes ............................................................................................................. 2

4 Requirements ......................................................................................................................................... 6

4.1 Materials ................................................................................................................................................. 64.2 Appearance ............................................................................................................................................ 64.3 Performance ........................................................................................................................................... 64.4 Leak tightness ....................................................................................................................................... 6

5 Test methods ......................................................................................................................................... 75.1 Materials ................................................................................................................................................. 75.2 Size tolerance ........................................................................................................................................ 75.3 Appearance ............................................................................................................................................ 75.4 Performance ........................................................................................................................................... 75.5 Leak tightness ....................................................................................................................................... 7

6 Marking, packing, transportation and storage ................................................................................... 76.1 Marking ................................................................................................................................................... 7

6.2 Packing ................................................................................................................................................... 76.3 Transportation ....................................................................................................................................... 86.4 Storage ................................................................................................................................................... 8

Annex A(informative) the requirement when the distance is less than 1/4L from the bow. ...................... 9

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iv ISO 2011All 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 ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with theInternational 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 Standardsadopted 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 patentrights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO was prepared by Technical Committee ISO/TC 8, , Subcommittee SC 8, .

This second/third/... edition cancels and replaces the first/second/... edition (), [clause(s) / subclause(s) /table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.

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ISO 2011All rights reserved v

Introduction

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WORKING DRAFT ISO/WD

ISO 2011All rights reserved 1

Ships and marine technology

Oil-tight hatch covers

1 Scope

This International Standard specifies requirements for the classification and designation, requirements, testmethods, inspection code, marking, packing, transportation and storage of the oil-tight hatch cover.

This International Standard is applicable to the design, manufacture and acceptance of the oil-tight hatchcover.

2 Normative references

The following referenced documents are indispensable to the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.

ISO 630 Steel plate, wide flat steel, steel bar, and profile steel.

ISO 9328-5 Stainless steel plate and steel belt.

3 Classification

3.1 Classification

For the classification of the oil-tight hatch cover, refers to table 1.

Table 1Classification of Oil-Tight Hatch Cover

Dimensions in millimeters

Type Name Sizes of Deck Opening

A1

Circular oil-tight hatch cover

600, 700, 800,

900, 1000, 1200A2

B1Oil-tight hatch cover with circulartop opening and elliptical bottom

opening

7501200, 7501300,

8001400, 9001500

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3.2 Constructions and basic sizes

3.2.1 For the construction and basic sizes of A1 oil-tight hatch cover, refer to figure 1 and table 2.

Figure 1Construction of A1 Oil-Tight Hatch Cover

Table 2Basic Size of A1 Oil-Tight Hatch Cover


Size ofDeck

Opening

D

Size ofCoaming

D1

H L

Thicknessof Coaming

T

Thickness ofCover

t

Quantity ofClasp

Weight

Kg

600 630

760

480

12

12

4 364.4

700 730 530

6

408.9

800 830 580 464.3

900 930 665 511.7

1000 1030 682

14

578.6

1200 1230 782 682.0

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3.2.2 For the construction and basic sizes of A2 oil-tight hatch cover, refer to figure 2 and table 3.

Figure 2Construction of A2 Oil-Tight Hatch Cover

Table 3Basic Size of A2 Oil-Tight Hatch Cover


Size of Deck

Opening

D

Size of

Coaming

D1

H L

Thickness of

Coaming

T

Thickness of

Cover

t

Quantity of

Clasp

Weight

Kg

600 630

760

405

12

12

4

700 730 455

6

800 830 505

900 930 575

1000 1030 625

14

1200 1230 725

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3.2.3 For the construction and basic sizes of B1 oil-tight hatch cover, refer to figure 3 and table 4.

Figure 3Construction of B1 Oil-Tight Hatch Cover

Table 4Basic Size of B1 Oil-Tight Hatch Cover


Size of Deck

Opening

LB

Size of

Coaming

L1B1

H L

Thickness of

Coaming

T

Thickness of

Cover

t

Quantity of

Clasp

Weight

Kg

7501200 7801230

760

556

12 12 6

7501300 7801330 556

8001400 8301430 595

9001500 9301530 606

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3.2.4 For the construction and basic sizes of B2 oil-tight hatch cover, refer to figure 4 and table 5.

Figure 4Construction of B2 Oil-Tight Hatch Cover

Table 5

Basic Size of B2 Oil-Tight Hatch Cover


Size of Deck

Opening

LB

Size of

Coaming

L1B1

H L

Thickness of

Coaming

T

Thickness of

Cover

t

Quantity of

Clasp

Weight

Kg

7501200 7801230

760

480

12 12 6

7501300 7801330 480

8001400 8301430 505

9001500 9301530 575

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4 Requirements

4.1 Materials

4.1.1 For the materials of the major components for the oil-tight hatch cover, refer to table 6.

Table 6Materials of the Major Components for the Oil-Tight Hatch Cover

Name of Components

Materials

Name Trademark ISO No.

Coaming, cover plate, bracket,

guide plate, connecting plate,

connecting rod, lock catch,

ear plate, stiffener, sight cap,

reinforcing plate with pressing

ring, switching mechanism

Structural steel for hull E235-A ISO 630

Stainless steel

X5CrNi18-9

X2CrNiMo17-12

ISO 9328-5

Seal ringsNitrile butadiene rubber,

fluoro rubber, Teflon

Wing clasp Brass

4.1.2 Shore hardness shall be among 35~45 and the tensile strength no less than 14MPa when thematerial of seal ring is nitrile butadiene rubber; Shore hardness shall be less than 60 and the tensile strengthno less than 14MPa when the material of seal ring is fluoro rubber.

4.2 Appearance

There shall be no such defects as burr and crack on the surface of the oil-tight hatch cover, and the sharpedges shall be rounded or chamfered.

4.3 Performance

The oil-tight hatch cover may be handled by one operator alone; there shall be no shake or clamping

stagnation when it opens/closes.

4.4 Leak tightness

4.4.1 The packing washer and the pressing ring of the oil-tight hatch cover shall contact continuously, andthe width of their press mark shall be no less than half of the thickness of the coaming.

4.4.2 Leakage is unacceptable when the oil-tight hatch cover is under the pressure between 0.025MPa and0.10MPa.

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5 Test methods

5.1 Materials

Check materials with the method applied to the trademark and the quality certificate.

5.2 Size tolerance

Measure the main size tolerances of the oil-tight hatch cover with conventional measuring devices.

5.3 Appearance

Check the appearance of the oil-tight hatch cover with visual and touching method..

5.4 Performance

Check the flexibility and stability of the hinge and the screw clasp by continuously opening and closing thehatch cover twice by one operator alone and twice swiveling the rigging screw.

5.5 Leak tightness

5.5.1 Add whiting to the pressing ring, and then close the oil-tight hatch cover. Check the width of the press

mark on the sealing member after opening the cover.

5.5.2 Install the oil-tight hatch cover on the special sealing test chamber and close the cover. Inject waterand supply pressure among 0.025MPa and 0.10MPa to the chamber, maintain it for five minutes, and thencheck the leak tightness condition of the cover.

6 Marking, packing, transportation and storage

6.1 Marking

Markings for the oil-tight hatch cover shall include as follows:

a) Name of manufacturers;

b) Name of products;

c) Specifications and standard numbers of the products;

d) Date of production;

e) Certified stamp of the products;

f) According to the requirements of the purchaser, the name of the oil hold where the cover is located isbead welded in a proper position on the oil-tight hatch cover.

6.2 Packing

6.2.1 Tighten the closed oil-tight hatch cover with ropes and then pack it up.

6.2.2 Certificate of the product qualification and vessel inspection certificate shall be attached to the

packing container.

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6.3 Transportation

Avoid collision and rainwater immersion during the transportation of the oil-tight hatch cover.

6.4 Storage

The oil-tight hatch cover shall be indoor stored, and contact with acid, alkaline or salt-base materials shall beavoided.

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Annex A(informative)

the requirement when the distance is less than 1/4L from the bow.

The components of the oil-tight hatch cover shall comply with the requirement that the distance is less than1/4L from the bow.

A.1 For the reinforcement materials of the hatch coaming, refer to figure A.1.

Figure A.1

A.2 For the wing clasp of the oil-tight hatch cover, refer to figure A.2.

Figure A.2

A.3 For the secondary locking device of the oil-tight hatch cover, refer to figure A.3.

Figure A.3

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ISO_TC_8___SC_8_N_168 (1)