ISO 17907:2014

Ships and marine technology - Single point mooring arrangements for conventional tankers

ISO 17907:2014 specifies the technical requirements and test methods for the equipment necessary for the ships intended to use single point mooring (hereinafter referred to as "SPM") arrangements, such as bow chain stoppers, bow fairleads, and pedestal rollers. ISO 17907:2014 is applicable to the SPM arrangements provided for tankers, gas carriers, and chemical vessels.

Navires et technologie marine — Emplacements pour point d'amarrage unique pour les navires-citernes conventionnels

General Information

• Status: Published
• Publication Date: 29-Oct-2014
• ICS: 47.020.01 - General standards related to shipbuilding and marine structures
• Technical Committee: ISO/TC 8/SC 4 - Outfitting and deck machinery
• Drafting Committee: ISO/TC 8/SC 4/WG 3 - Outfitting
• Current Stage: 9093 - International Standard confirmed
• Start Date: 23-Aug-2025
• Completion Date: 13-Dec-2025

Relations

• Consolidated By: ISO 20701:2017 - Leather - Tests for colour fastness - Colour fastness to saliva
• Effective Date: 06-Jun-2022

Overview

ISO 17907:2014 - Ships and marine technology - Single point mooring arrangements for conventional tankers - specifies technical requirements and test methods for shipboard equipment used with single point mooring (SPM) systems. The standard covers primary SPM components such as bow chain stoppers, bow fairleads, and pedestal rollers, and is applicable to tankers, gas carriers, and chemical vessels. ISO 17907 is intended to ensure safe, robust mooring interfaces between ships and SPM buoys or risers.

Key topics and technical requirements

• Scope and arrangement
  • General layout and installation guidance for SPM arrangements on tankers (figures and dimensional guidance).
• Bow chain stoppers
  • SWL requirements by ship size: ≈200 t (≤100 000 DWT), ≈250 t (>100 000 to ≤150 000 DWT), ≈350 t (>150 000 DWT - typically with two stoppers).
  • Minimum safety factor on yield: 2.0 × SWL.
  • Operating force limit: ≤245 N (validated by lever/balance test using a 25 kg weight).
  • Material and manufacturing: weldable cast, forged, or rolled steel; free from defects (cracks, sand holes, pores).
  • Strength and operation tests: material inspection (chemical/physical), magnetic particle or ultrasonic inspection where applicable, and a 1-minute strength test at SWL.
• Bow fairleads
  • Closed type with minimum opening 600 mm (width) × 450 mm (height).
  • Strength to accommodate towline angles up to ±90° horizontal and ±30° vertical.
  • Same material and non‑defect requirements as chain stoppers; 1-minute strength test at SWL.
• Pedestal rollers
  • Must resist horizontal forces of at least 225 kN or the resultant from a 225 kN pick-up rope pull.
  • Common diameters: Ø350, Ø400, Ø450.
  • Strength test: 1-minute load and rotation check after unloading.
• Marking
  • Clearly marked SWL and date or serial number of manufacture.
• Annexes
  • Informative dimensional examples and types for chain stoppers, fairleads, and pedestal rollers.

Applications and who uses this standard

ISO 17907:2014 is used by:

• Ship designers and naval architects specifying SPM interfaces and foundations
• Shipbuilders and outfitters manufacturing/installing bow stoppers, fairleads, and rollers
• Manufacturers of mooring deck equipment ensuring compliance and test methods
• Classification societies, port engineers, shipowners/operators, and inspectors evaluating SPM readiness and safety
• Procurement and maintenance teams verifying SWL markings, tests, and material quality

Practical benefits include improved safety during offshore loading/unloading, harmonized equipment specifications for SPM connections, and clear test protocols to confirm structural integrity.

Related standards

Complementary guidance includes classification society rules, IMO recommendations for offshore mooring and loading, and other ISO standards and IEC/ISO directives on deck machinery, materials testing, and conformity assessment for marine equipment.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17907
First edition
2014-11-01
Ships and marine technology — Single
point mooring arrangements for
conventional tankers
Navires et technologie marine — Emplacements pour point
d’amarrage unique pour les navires-citernes conventionnels
Reference number
©
ISO 2014
© ISO 2014
All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
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Published in Switzerland
ii © ISO 2014 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Technical requirements . 1
2.1 Design arrangement of SPM arrangements for tankers . 1
2.2 Configuration and design manufacturing requirements for SPM arrangements
for tankers . 3
3 Test method . 4
3.1 Bow chain stoppers . 4
3.2 Bow fairleads . 5
3.3 Pedestal rollers . 6
4 Markings . 7
Annex A (informative) Types and dimensions of chain stoppers . 8
Annex B (informative) Types and dimensions of fairleads .11
Annex C (informative) Types and dimensions of pedestal rollers .12
Foreword
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electrotechnical standardization.
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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
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to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 17907:2014(E)
Ships and marine technology — Single point mooring
arrangements for conventional tankers
1 Scope
This International Standard specifies the technical requirements and test methods for the equipment
necessary for the ships intended to use single point mooring (hereinafter referred to as “SPM”)
arrangements, such as bow chain stoppers, bow fairleads, and pedestal rollers.
This International Standard is applicable to the SPM arrangements provided for tankers, gas carriers,
and chemical vessels.
2 Technical requirements
2.1 Design arrangement of SPM arrangements for tankers
The general design arrangement is given in Figure 1 and Figure 2.
137 mm
2.7 m̚3.7 m
Key
1 centreline of chain parallel to deck
2 bow chain stopper
3 bow fairlead
4 to pedestal roller or direct to winch storage drum
5 half breadth of chain
Figure 1 — General arrangement of SPM arrangements for tankers
a) Installed with one bow chain stopper
b) Installed with two bow chain stoppers
Key
1 direct to winch storage drum without pedestal rollers
2 not less than 3 m from aft side of bow chain stopper
3 bow chain stopper
4 distance between fairlead and front side of the bow chain stopper is 2,7 m~3,7 m
5 bow fairlead
6 to winch storage drum via pedestal rollers
Figure 2 — General arrangement of SPM arrangements for tankers installed with different
stoppers
2 © ISO 2014 – All rights reserved
2,0 m̚3,0 m
2.2 Configuration and design manufacturing requirements for SPM arrangements for
tankers
2.2.1 Bow chain stoppers
a) The configuration and load requirements are given in Table 1.
Table 1 — Configuration and load requirements of chain stoppers
Minimum safe working load
Number of bow chain
Ship size (SWL)
stoppers
(t)
100 000 tonnes DWT or less
1 200
(Two chain stoppers can also be installed on the
ship of such size)
Over 100 000 but not greater than 150 000 tonnes
DWT
1 250
(Two chain stoppers can also be installed on the
ship of such size)
Over 150 000 tonnes DWT 2 350
NOTE The safety factor on yield of bow chain stoppers should be minimum of 2,0 SWL.
b) The general types of bow chain stoppers are given in Annex A.
c) In the closed position, the design shall be such that it can prevent chafe chains from throw-out due
to the sudden re
...