iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
SIST

SIST EN ISO 19901-4:2025

(Main)

Petroleum and natural gas industries - Specific requirements for offshore structures - Part 4: Geotechnical design considerations (ISO 19901-4:2025)

Petroleum and natural gas industries - Specific requirements for offshore structures - Part 4: Geotechnical design considerations (ISO 19901-4:2025)

This document contains provisions for geotechnical engineering design that are applicable to a broad range of offshore structures, rather than to a particular structure type. This document outlines methods developed for the design of shallow foundations with an embedded length (L) to diameter (D) ratio L/D < 0,5, intermediate foundations, which typically have 0,5 ≤ L/D ≤ 10 (see Clause 7), and long and flexible pile foundations with L/D > 10 (see Clauses 8 and 9).
This document also provides guidance on soil-structure interaction aspects for flowlines, risers and conductors (see Clause 10) and anchors for floating facilities (see Clause 11). This document contains brief guidance on site and soil characterization, and identification of hazards (see Clause 6).
This document can be applied for foundation design for offshore structures used in the lower carbon energy industry.

Erdöl- und Erdgasindustrie - Besondere Anforderungen an Offshore-Bauwerke - Teil 4: Geotechnische und Fundament-Auslegungsmerkmale (ISO 19901-4:2025)

Industries du pétrole et du gaz naturel - Exigences spécifiques relatives aux structures en mer - Partie 4: Bases conceptuelles géotechniques (ISO 19901-4:2025)

Le présent document contient les dispositions relatives à la conception géotechnique qui s'appliquent à une vaste gamme de structures en mer, plutôt qu'à un type particulier de structure. Le présent document décrit les méthodes développées principalement pour la conception des fondations superficielles avec un rapport entre longueur enfouie (L) et diamètre (D) L/D < 0,5, des fondations intermédiaires avec 0,5 ≤ L/D ≤ 10 (voir l'Article 7) et des fondations par pieux longs et flexibles avec L/D > 10 (voir les Articles 8 et 9).
Le présent document fournit également des recommandations sur les aspects relatifs à l'interaction sol-structure pour les conduits d'écoulement, les risers et les conducteurs (voir l'Article 10), ainsi que pour les ancrages des structures flottantes (voir l'Article 11). Le présent document contient de brèves recommandations sur la caractérisation du site et des sols, ainsi que sur l'identification des dangers (voir l'Article 6).
Le présent document peut être appliqué à la conception de fondations pour les structures en mer utilisées dans l'industrie des énergies à faible teneur en carbone.

Industrija za predelavo nafte in zemeljskega plina - Posebne zahteve za naftne ploščadi - 4. del: Obravnava geotehničnih značilnosti projektiranja (ISO 19901-4:2025)

General Information

Status
Published
Public Enquiry End Date
09-Aug-2022
Publication Date
12-Mar-2025
ICS
75.180.10 - Exploratory, drilling and extraction equipment
93.020 - Earthworks. Excavations. Foundation construction. Underground works
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Mar-2025
Due Date
15-May-2025
Completion Date
13-Mar-2025
Ref Project
EN ISO 19901-4:2025 - Oil and gas industries including lower carbon energy - Specific requirements for offshore structures - Part 4: Geotechnical design considerations (ISO 19901-4:2025)

Relations

Revised
SIST EN ISO 19901-4:2016 - Petroleum and natural gas industries - Specific requirements for offshore structures - Part 4: Geotechnical and foundation design considerations (ISO 19901-4:2016)
Effective Date
19-Jan-2023

Buy Standard

EN ISO 19901-4:2025 - BARVEEN ISO 19901-4:2025 - BARVE
PreviousNext
Standard
EN ISO 19901-4:2025 - BARVE
English language
237 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI STANDARD
01-maj-2025
Industrija za predelavo nafte in zemeljskega plina - Posebne zahteve za naftne
ploščadi - 4. del: Obravnava geotehničnih značilnosti projektiranja (ISO 19901-
4:2025)
Petroleum and natural gas industries - Specific requirements for offshore structures -
Part 4: Geotechnical design considerations (ISO 19901-4:2025)
Erdöl- und Erdgasindustrie - Besondere Anforderungen an Offshore-Bauwerke - Teil 4:
Geotechnische und Fundament-Auslegungsmerkmale (ISO 19901-4:2025)
Industries du pétrole et du gaz naturel - Exigences spécifiques relatives aux structures
en mer - Partie 4: Bases conceptuelles géotechniques (ISO 19901-4:2025)
Ta slovenski standard je istoveten z: EN ISO 19901-4:2025
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 19901-4
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 75.180.10 Supersedes EN ISO 19901-4:2016
English Version
Oil and gas industries including lower carbon energy -
Specific requirements for offshore structures - Part 4:
Geotechnical design considerations (ISO 19901-4:2025)
Industries du pétrole et du gaz y compris les énergies à Öl und Gasindustrie einschließlich kohlenstoffarmer
faible teneur en carbone - Exigences spécifiques Energieträger-Besondere Anforderungen an Offshore-
relatives aux structures en mer - Partie 4: Bases Bauwerke-Teil 4: Geotechnische Auslegungsmerkmale
conceptuelles géotechniques (ISO 19901-4:2025) (ISO 19901-4:2025)
This European Standard was approved by CEN on 10 February 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19901-4:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 19901-4:2025) has been prepared by Technical Committee ISO/TC 67 "Oil and
gas industries including lower carbon energy" in collaboration with Technical Committee CEN/TC 12
“Oil and gas industries including lower carbon energy” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 19901-4:2016.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 19901-4:2025 has been approved by CEN as EN ISO 19901-4:2025 without any
modification.
International
Standard
ISO 19901-4
Third edition
Oil and gas industries including
2025-02
lower carbon energy — Specific
requirements for offshore
structures —
Part 4:
Geotechnical design considerations
Industries du pétrole et du gaz y compris les énergies à faible
teneur en carbone — Exigences spécifiques relatives aux
structures en mer —
Partie 4: Bases conceptuelles géotechniques
Reference number
ISO 19901-4:2025(en) © ISO 2025

ISO 19901-4:2025(en)
© ISO 2025
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 19901-4:2025(en)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms. 4
4.1 Symbols for shallow and intermediate foundation design.4
4.2 Symbols for pile foundation design .6
4.3 Symbols for soil-structure interaction for auxiliary subsea structures, risers and
flowlines .9
4.4 Symbols for design of anchors for stationkeeping systems .10
4.5 Abbreviated terms . 12
5 General requirements .13
5.1 General . 13
5.2 Design cases and partial factors . 13
5.3 Representative and design values of geotechnical parameters .14
5.3.1 Guidelines .14
5.3.2 Determination of representative and design values of soil parameters .14
5.4 Reliability-based geotechnical design .16
5.5 Testing and instrumentation .16
6 Site investigation, identification of geohazards and carbonate soils . 17
6.1 General .17
6.2 Geological modelling and identification of hazards .17
6.2.1 General .17
6.2.2 Assessment of site geohazards .18
6.3 Carbonate soils .18
6.3.1 General .18
6.3.2 Characteristic features and properties of carbonate soils .18
6.3.3 Foundations in carbonate soils .18
7 Design of shallow and intermediate foundations for fixed structures . 19
7.1 General .19
7.2 Principles . 20
7.2.1 General principles . 20
7.2.2 Foundation embedment . 20
7.2.3 Sign conventions, nomenclature and action reference point .21
7.3 Acceptance criteria .21
7.3.1 Material and action factors .21
7.3.2 Use of partial factors in design . 22
7.4 Design considerations . 23
7.4.1 Adjusting for soil plug weight . 23
7.4.2 Skirt spacing. 23
7.4.3 Foundation base perforations .
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

SIST
SIST EN 50160:2023/A1:2025(Amendment)
Voltage characteristics of electricity supplied by public electricity networks
EN 50160:2022/A1:2025

This document specifies the main characteristics of the voltage at a network user's supply terminals in public low voltage, medium, high, and extra-high voltage AC electricity networks under normal operating conditions. This document specifies the limits or values within which the voltage characteristics can be expected to remain at any supply terminal in public European electricity networks, only. Industrial networks are excluded from the scope of EN 50160. NOTE 1 If non-public networks (e.g. residential quarters, energy communities, office centres, shopping centres) have similar end-users as public networks, it is strongly advised to apply the same requirements as for public networks. This document does not apply under abnormal operating conditions, including the following: a) a temporary supply arrangement to keep network users supplied during conditions arising as a result of a fault, maintenance and construction work, or to minimize the extent and duration of a loss of supply; b) in the case of non-compliance of a network user's installation or equipment with the relevant standards or with the technical requirements for connection, established either by the public authorities or the network operator, including the limits for the emission of conducted disturbances; NOTE 2 A network user’s installation can include load and generation. c) in exceptional situations, in particular: 1) exceptional weather conditions and other natural disasters; 2) third party interference; 3) acts by public authorities, 4) industrial actions (subject to legal requirements); 5) force majeure; 6) power shortages resulting from external events. The voltage characteristics given in this document refer to conducted disturbances in public electric power networks. They are not intended to be used as electromagnetic compatibility (EMC) levels or product emission limits. Power quality is related to EMC in several ways – especially because compliance with power quality requirements depends on the control of cumulative effect of electromagnetic emissions from all/multiple equipment and/or installations. Therefore, the voltage characteristics given in this document gives guidance for specifying requirements in equipment product standards and in installation standards. NOTE 3 The performance of equipment might be impaired if it is subjected to supply conditions which are not specified in the equipment product standard. NOTE 4 This document can be superseded in total or in part by the terms of a contract between the individual network user and the network operator. The sharing of complaint management and problem mitigation costs between the involved parties is outside the scope of EN 50160.

  • Amendment
    7 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN ISO 19085-12:2025(Main)
Woodworking machines - Safety - Part 12: Tenoning/profiling machines (ISO 19085-12:2024)
EN ISO 19085-12:2024

This document specifies the safety requirements and measures for manually loaded and unloaded
— single end tenoning machines with manual feed sliding table (defined in 3.1),
— single end tenoning machines with mechanical feed sliding table (defined in 3.2),
— single end tenoning and/or profiling machines with mechanical feed (defined in 3.3),
— double end tenoning and/or profiling machines with mechanical feed (defined in 3.4), also designed to be automatically loaded/unloaded,
— angular systems for tenoning and profiling with mechanical feed (defined in 3.5),
with maximum workpiece height capacity of 200 mm for single end machines and 500 mm for double end machines, capable of continuous production use, altogether referred to as “machines”.
It deals with all significant hazards, hazardous situations and events as listed in Annex A, relevant to machines, when operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer including reasonably foreseeable misuse. Also, transport, assembly, dismantling, disabling and scrapping phases have been taken into account.
The machines are designed to process in one pass one end or two sides, either opposite or perpendicular to each other, of workpieces made of:
1) solid wood;
2) materials with similar physical characteristics to wood (see ISO 19085 1:2021, 3.2);
3) fibre-cement, rock/glass wool, gypsum, plasterboard, only with machines with mechanical feed.
It is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with:
— sanding units;
— fixed or movable workpiece support;
— automatic tool changing;
— automatic workpiece returner;
— glass bead saw unit;
— hinge recessing unit;
— post forming edge pre-cutting;
— boring unit;
— dynamic processing unit;
— sawing unit installed out of the integral enclosure, between machine halves in double end machines;
— foiling unit;
— coating unit;
— grooving unit with milling tool installed out of the integral enclosure, between machine halves;
— brushing unit;
— gluing unit;
— sealing unit;
— dowels inserting unit;
— tongues inserting unit;
— inkjet marking unit;
— laser marking unit;
— labelling unit;
— workpiece back-up device (anti-chipping / anti-splintering device);
— quick tool changing system.
This document does not deal with any hazards related to:
a) systems for automatic loading and unloading of the workpiece to a single machine other than automatic workpiece returner;
b) single machine being used in combination with any other machine (as part of a line);
c) use of tools, other than saw blades or milling tools for grooving, installed between machine halves and out of the integral enclosure in double end machines;
d) use of tools protruding out of the integral enclosure;
e) chemical characteristics of fibre-cement, rock/glass wool, gypsum, plasterboard and their dust.
It is not applicable to machines intended for use in potentially explosive atmosphere nor to machines manufactured prior to its publication.

  • Standard
    76 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN ISO 13855:2025(Main)
Safety of machinery - Positioning of safeguards with respect to the approach of the human body (ISO 13855:2024)
EN ISO 13855:2024

This document specifies requirements for the positioning and dimensioning of safeguards with respect to the approach of the human body or its parts towards hazard(s) within the intended span-of-control as follows:
—     the position and dimension of the detection zone(s) of ESPE and pressure-sensitive mats and pressure-sensitive floors;
—     the position of two-hand control devices and single control devices;
—     the position of interlocking guards.
This document also specifies requirements for the positioning of safety-related manual control devices (SRMCD) with respect to the approach of the human body or its parts from within the safeguard space relative to:
—     the position and dimension of the detection zone(s) of ESPE and pressure-sensitive mats and pressure-sensitive floors; and
—     the position and dimension of interlocking guards.
When evaluating the ability of the human body or its parts to access SRMCD from within the intended safeguarded space, the requirements of this document are also applicable to determine the dimensions of safeguard(s). Approaches such as running, jumping or falling, are not considered in this document.
NOTE 1        The values for approach speeds (walking speed and upper limb movement) in this document are time tested and proven in practical experience.
NOTE 2        Other types of approach can result in approach speeds that are higher or lower than those defined in this document.
This document applies to safeguards used on machinery for the protection of persons 14 years and older.
Safeguards considered in this document include:
a)       electro-sensitive protective equipment (ESPE) such as:
—    active opto-electronic protective devices (AOPDs) (see IEC 61496-2);
—    AOPDs responsive to diffuse reflection that have one or more detection zone(s) specified in two dimensions (AOPDDRs-2D) (see IEC 61496-3);
—    AOPDs responsive to diffuse reflection that have one or more detection zone(s) specified in three dimensions (AOPDDRs-3D) (see IEC 61496-3);
—    vision based protective devices using reference pattern techniques (VBPDPP) (see IEC/TS 61496-4-2);
—    vision based protective devices using stereo vision techniques (VBPDST) (see IEC/TS 61496-4-3);
b)       pressure-sensitive mats and pressure-sensitive floors (see ISO 13856-1);
c)        two-hand control devices (see ISO 13851);
d)       single control devices;
e)       interlocking guards (see ISO 14120).
This document is not applicable to:
—     safeguards (e.g. pendant two-hand control devices) that can be manually moved, without using tools, nearer to the hazard zone than the separation distance;
—     protection against the risks from hazards arising from emissions (e.g. the ejection of solid or fluid materials, radiation, electric arcs, heat, noise, fumes, gases);
—     protection against the risks arising from failure of mechanical parts of the machine or gravity falls.
The separation distances derived from this document do not apply to safeguards used solely for presence sensing function.

  • Standard
    85 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 1083-2:2025(Main)
Power-driven brushes - Part 2: Safety requirements
EN 1083-2:2024

This document specifies requirements and measures for removal or reduction of hazards resulting from the design and application of power-driven brushes.
NOTE   Power-driven brushing tools are e.g. cup brushes, wheel brushes, end brushes, disc brushes, tube brushes and head brushes.
This document also contains procedures and tests for verification of compliance with the requirements as well as safety information for use, which is to be made available to the user by the manufacturer.
This document does not apply to cylinder brushes and strip brushes, brushes for car washing, vacuum cleaners, floor cleaning, drain and street cleaning machines and dental brushes.

  • Standard
    17 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 1083-1:2025(Main)
Power-driven brushes - Part 1: Definitions and nomenclature
EN 1083-1:2024

This document defines terms which are used to describe power-driven brushes and strip brushes and describes the designation system.
This document does not cover brushes for car wash sites, vacuum cleaners, carpet cleaning machines, sewer and street cleaning machines, dental brushes, brushes for sealing and stripping.

  • Standard
    77 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN ISO 25178-604:2025(Main)
Geometrical product specifications (GPS) - Surface texture: Areal - Part 604: Design and characteristics of non-contact (coherence scanning interferometry) instruments (ISO 25178-604:2025)
EN ISO 25178-604:2025

This document specifies the design and metrological characteristics of coherence scanning interferometry (CSI) instruments for the areal measurement of surface topography. Because surface profiles can be extracted from surface topography data, the methods described in this document are also applicable to profiling measurements.

  • Standard
    31 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN ISO 4064-2:2025(Main)
Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2024)
EN ISO 4064-2:2025

This document is applicable to the type evaluation and initial verification testing of water meters for cold potable water and hot water as defined in ISO 4064-1:2024|OIML R 49‑1:2024. OIML Certificates of conformity can be issued for water meters under the scope of the OIML Certificate System, provided that this document, ISO 4064-1:2024|OIML R 49‑1:2024 and ISO 4064-3:2024|OIML R 49‑3:2024 are used in accordance with the rules of the system.
This document sets out details of the test programme, principles, equipment and procedures to be used for the type evaluation, and initial verification of a meter type.
The provisions of this document also apply to ancillary devices, if required by national regulations.
The provisions include requirements for testing the complete water meter and for testing the measurement transducer (including the flow or volume sensor) and the calculator (including the indicating device) of a water meter as separate units.

  • Standard
    114 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN ISO 25178-602:2025(Main)
Geometrical product specifications (GPS) - Surface texture: Areal - Part 602: Design and characteristics of non- contact (confocal chromatic probe) instruments (ISO 25178-602:2025)
EN ISO 25178-602:2025

This document specifies the design and metrological characteristics of a particular non-contact instrument for measuring surface texture using a confocal chromatic probe based on axial chromatic aberration of white light. Additional metrological characteristics can be found in ISO 25178-600. Because surface profiles can be extracted from areal surface topography data, the methods described in this document are also applicable to profiling measurements.

  • Standard
    23 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN ISO 9351:2025(Main)
Galvanic anodes for cathodic protection in seawater and saline sediments (ISO 9351:2025)
EN ISO 9351:2025

The proposed Standard, based upon a revised and updated EN 12496: 2013 will specify the minimum requirements and give recommendations for the chemical composition, the electrochemical properties, the physical tolerances, and the test and inspection procedures for cast galvanic anodes of aluminium, magnesium and zinc alloys for cathodic protection in sea water and saline mud.
The Standard will be applicable to the majority of galvanic anodes used for seawater and saline mud applications, i.e. cast anodes of trapezoidal, "D", or circular cross section and bracelet type anodes.
The general requirements and recommendations of this proposed Standard may also be applied to other anode shapes, e.g. half-spherical, button, etc., which are sometimes used for seawater applications.
Applications for this Standard are in offshore renewables, flood defences, offshore oil and gas, offshore or submarine pipelines, ports and harbours, ships and all applications in which galvanic anodes are used for cathodic protection in sea water and saline muds.
Work is proposed to be undertaken in parallel between ISO TC 156 WG 10 and CEN TC 219 WG3, under ISO lead in accordance with the Vienna Convention. This scope is agreed in principle by both parties.

  • Standard
    49 pages
    English language
    sale 10% off
    e-Library read for
    1 day