ISO 4127-1:1979
(Main)Shipbuilding - Inland navigation - Fairleads - Part 1: Two-lip fairleads
Shipbuilding - Inland navigation - Fairleads - Part 1: Two-lip fairleads
Specifies the design, sizes, basic parameters and technical requirements.
Construction navale — Navigation intérieure — Chaumards — Partie 1: Chaumards à deux lèvres
General Information
Relations
Overview - ISO 4127-1:1979 (Two-lip fairleads for inland navigation)
ISO 4127-1:1979 is an international standard for cast two-lip fairleads used on inland navigation vessels. It specifies the required design, sizes, basic parameters and technical requirements for fairleads intended for mooring and handling steel wire ropes on inland ships. The standard defines a set of nominal load classes and prescribes material, finish and strength criteria to ensure safe, repeatable performance in shipbuilding and outfitting.
Key topics and technical requirements
- Scope: Applies to cast two-lip fairleads for inland vessels; design is presented in the standard’s figure(s).
- Load classes: Basic dimensions and properties correspond to seven nominal breaking loads: 25, 40, 63, 100, 160, 250 and 400 kN.
- Strength requirement: Fairleads must withstand, without damage or plastic deformation, the breaking load of the compatible steel wire rope specified in the standard’s tables.
- Material: Fairleads shall be fabricated from weldable cast steel with a minimum yield point as stated in the document.
- Surface finish: Castings are to be annealed and cleaned (sand-blasted) prior to delivery.
- Referenced standards: ISO 2408 (steel wire ropes - characteristics) is cited for rope properties and compatibility.
Practical applications
- Shipbuilders and shipyards use ISO 4127-1 to select and install fairleads that meet specified strength and dimensional requirements for inland vessels.
- Deck equipment manufacturers and foundries rely on the standard when designing and producing cast two-lip fairleads to ensure interchangeability and compliance.
- Mooring system designers, naval architects and marine engineers reference the standard to size fairleads consistent with rope breaking loads and deck layout.
- Classification societies and procurement teams use the standard as a benchmark for inspection, acceptance criteria and technical specifications in purchase orders and type approval.
Related standards
- ISO 2408 - Steel wire ropes for general purposes (referenced for rope breaking strength and characteristics).
- Other parts of ISO 4127 (if applicable) cover alternative fairlead types or additional requirements - consult ISO catalog for Part numbering.
Using ISO 4127-1:1979 ensures fairleads are specified with consistent dimensions, materials and load ratings, improving safety, maintenance predictability and equipment compatibility in inland navigation and shipbuilding projects.
Standards Content (Sample)
4127/1
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWE)I(L1YHAPO,WAR OPrAHH3ALMR fl0 CTAH~APTH3A~MM.ORGANISATION INTERNATIONALE DE hlORMALISAT1ON
Shipbuilding - Inland navigation - Fairleads -
Part 1 : Two-lip fairleads
Construction navale - Navigation intkrieure - Chaumards - Partie 1 : Chaumards A deux lkvres
First edition - 1979-07-01
UDC 629.122.014.24 Ref. No. ISO 4127/1-1979 (EI
Descriptors : shipbuilding, inland navigation, fair leads, specifications, equipmer?t specifications, dimensions.
Price based on 2 pages
oreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bedies). The work of developing Interna-
tional Standards is carried out through ISO technical committees. Every member body
interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 4127/1 was developed by Technical Committee ISO/TC 8,
Shipbui/ding, and was circulated to the member bodies in June 1977.
It has been approved by the member bodies of the following countries :
Austria Greece Netherlands
Belgium India Poland
Brazil Ireland Romania
Bulgaria Italy Spain
Turkey
Czechoslovakia Japan
Finland Korea, Dem.P.Rep. of United Kingdom
France Korea, Rep. of USSR
Germany, F. R. Mexico
No member body expressed disappro
...
Norme internationale
4127/1
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWE)I(LIYHAPO~HAR OPrAHH3A~Hfl fl0 CTAHJWTH3A~WWORGANISATION INTERNATIONALE DE NORMALISATION
Construction navale - Navigation intérieure -
Chaumards -
Partie 1 : Chaumards à deux lèvres
Shïpbuïlding - lnland navigation - Fairleads - Part I : Two-lip fairleads
Première édition - 1979-07-01
CDU 629.122.014.24
Mf. no : ISO 4127/1-1979 (F)
Descripteurs : construction navale, navigation fluviale, écubier , spécif ication, spécif ication de matériel, dimension.
Prix basé sur 2 pages
Avant-propos
LIS0 (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 4127/1 a été élaborée par le comité technique ISO/TC 8,
Construction navale, et a été soumise aux comités membres en juin 1977.
Les comités membres des pays suivants l‘ont approuvée :
Allemagne Finlande Pays-bas
Autriche France Pologne
Belgique Grèce Roumanie
Brésil Inde Royaume-Uni
Bulgarie Iriande Tchécoslovaquie
Corée, Rép. dem. p. de Italie Turquie
Corée, Rép. de Japon URSS
Espagne Mexique
Aucun comité membre ne l’a désapprouvé.
Organisation internationale de normalisation, 1979
Imprimé en Suisse
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Frequently Asked Questions
ISO 4127-1:1979 is a standard published by the International Organization for Standardization (ISO). Its full title is "Shipbuilding - Inland navigation - Fairleads - Part 1: Two-lip fairleads". This standard covers: Specifies the design, sizes, basic parameters and technical requirements.
Specifies the design, sizes, basic parameters and technical requirements.
ISO 4127-1:1979 is classified under the following ICS (International Classification for Standards) categories: 47.060 - Inland navigation vessels. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 4127-1:1979 has the following relationships with other standards: It is inter standard links to ISO 8230:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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