ISO 5894:2018

INTERNATIONAL ISO
STANDARD 5894
Third edition
2018-12
Ships and marine technology —
Manholes with bolted covers
Navires et technologie maritime — Trous d'homme avec couvercle
boulonné
Reference number
©
ISO 2018
© ISO 2018
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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Typical forms, nominal sizes and dimensions . 1
5 Fastening details . 8
6 Geometrical design of the oval and ellipses .13
7 Material .14
8 Quality of manufacture .14
9 Designation .14
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 on 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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 8, Ship design.
This third edition cancels and replaces the second edition (ISO 5894:1999), which has been technically
revised.
The main changes compared to the previous edition are as follows:
a) the type O manhole has been classified as type AO and BO;
b) the type E manhole has been classified as type AE and BE;
c) the nominal sizes of 450 × 350, 600 × 400, 600 × 450 and 800 × 600 for type CO manholes have
been added;
d) the nominal sizes of 450 × 350, 600 × 400, 600 × 450 and 800 × 600 for type DO manholes have
been added;
e) the nominal sizes of 500 × 400 and 600 × 450 for type AO and type BO manholes have been added;
f) the plate thickness of manhole covers is more in line with the requirements of modern shipbuilding;
g) a marking for each manhole cover has been added;
h) a handle for each manhole cover has been added;
i) an auxiliary size for fasteners has been added;
j) the geometrical design of the oval manhole covers has been added;
k) the design of jacking-up bolts for every type of manhole has been added;
l) a free from asbestos requirement for the gasket material has been added;
iv © ISO 2018 – All rights reserved

m) the fastener coordinates values have been adjusted.
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.
INTERNATIONAL STANDARD ISO 5894:2018(E)
Ships and marine technology — Manholes with bolted
covers
1 Scope
This document specifies requirements for watertight and oiltight manholes of the current types with
bolted covers, for general shipboard use other than for pressure vessels.
It specifies the dimensions for the holes in the plating and the number, size and position of the fasteners.
It is applicable to manholes of raised coaming, surface mounted or recessed cover types.
The details of the manholes are at the discretion of the manufacturer.
2 Normative references
The following documents are referenced in this text in such a way that some or all of their content
constitutes requirements of this document. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 262, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
3 Terms and definitions
No terms and definitions are listed in this document.
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 http: //www .iso .org/obp
4 Typical forms, nominal sizes and dimensions
All dimensions are given in millimetres.
Manholes shall be classified as type AO, AE, BO, BE, CO or DO according to nominal sizes (see Figures 1
to 4 and Table 1 to 6).
The dimensions of the manholes and the spacing of the fasteners shall be in accordance with Figures 1
to 11 and Tables 1 to 7.
The nominal size l × b shall correspond to the length and breadth of the clear opening, as given in
1 1
Tables 1 to 6.
The thread of fasteners (nuts and bolts) shall be in accordance with ISO 262.
The thickness of the cover plate, ring and coaming shall be chosen by the user in accordance with the
values specified in Table 1 to Table 6 Classification society rules and regulatory conventions can require
higher values.
Figures 1 to 4 show manhole with raised coaming, surface mounted and recessed cover. In order to
ensure interchangeability of covers and gaskets, the dimensions of these components and the fastener
coordinates shall be as given in this document.
Figures 1 to 4 show welded studs as an example. Other reliable joints between the studs and plate ring
are permitted.
Dimensions in millimetres
Key
1 cover 3 plate ring 5 handle 7 jacking-up bolt 2 × M20
2 gasket 4 raised coaming 6 marking
The weld size and details should meet the recognized industrial standard.
NOTE 1 l × b is a clear opening.
1 1
NOTE 2 Jacking-up bolts 2 × M20 can be chosen by the user if suitable.
a
Fastener M20, hole Ф23 mm.
Figure 1 — Manhole with cover type AO and AE
2 © ISO 2018 – All rights reserved
...