EN ISO 19905-1:2023/prA1:2024
(Amendment)Oil and gas industries including lower carbon energy - Site-specific assessment of mobile offshore units - Part 1: Jack-ups: elevated at a site - Amendment 1 (ISO 19905-1:2023/DAmd1:2024)
Oil and gas industries including lower carbon energy - Site-specific assessment of mobile offshore units - Part 1: Jack-ups: elevated at a site - Amendment 1 (ISO 19905-1:2023/DAmd1:2024)
Öl- und Gasindustrie einschließlich kohlenstoffarmer Energieträger - Standortspezifische Beurteilung mobiler Offshore-Einheiten - Teil 1: Hubinseln: aufgeständert an einem Standort - Änderung 1 (ISO 19905-1:2023/DAmd1:2024)
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone - Évaluation spécifique du site d'unités mobiles en mer - Partie 1: Plateformes auto-élévatrices : Surélévées sur un site - Amendement 1 (ISO 19905-1:2023/DAmd1:2024)
Corrections d'erreurs dans le document original
Naftna in plinska industrija, vključno z nizkoogljično energijo - Ocenjevanje premičnih naftnih ploščadi na področju postavitve - 1. del: Dvižne ploščadi - Dopolnilo A1 (ISO 19905-1:2023/DAmd1:2024)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Naftna in plinska industrija, vključno z nizkoogljično energijo - Ocenjevanje
premičnih naftnih ploščadi na področju postavitve - 1. del: Dvižne ploščadi -
Dopolnilo A1 (ISO 19905-1:2023/DAmd1:2024)
Oil and gas industries including lower carbon energy - Site-specific assessment of
mobile offshore units - Part 1: Jack-ups: elevated at a site - Amendment 1 (ISO 19905-
1:2023/DAmd1:2024)
Öl- und Gasindustrie einschließlich kohlenstoffarmer Energieträger - Standortspezifische
Beurteilung mobiler Offshore-Einheiten - Teil 1: Hubinseln: aufgeständert an einem
Standort - Änderung 1 (ISO 19905-1:2023/DAmd1:2024)
Industries du pétrole et du gaz, y compris les énergies à faible teneur en carbone -
Évaluation spécifique du site d'unités mobiles en mer - Partie 1: Plateformes auto-
élévatrices : Surélévées sur un site - Amendement 1 (ISO 19905-1:2023/DAmd1:2024)
Ta slovenski standard je istoveten z: EN ISO 19905-1:2023/prA1:2024
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
Amendment
ISO 19905-1:2023/
DAM 1
ISO/TC 67/SC 7
Oil and gas industries including
Secretariat: BSI
lower carbon energy — Site-specific
assessment of mobile offshore
Voting begins on:
2024-12-16
units —
Voting terminates on:
Part 1: 2025-03-10
Jack-ups: elevated at a site
AMENDMENT 1
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Évaluation spécifique du site d'unités
mobiles en mer —
Partie 1: Plateformes auto-élévatrices : Surélévées sur un site
AMENDEMENT 1
ICS: 75.180.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
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RECIPIENTS OF THIS DRAFT ARE INVITED
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NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO 19905-1:2023/DAM 1:2024(en)
DRAFT
ISO 19905-1:2023/DAM 1:2024(en)
Amendment
ISO 19905-1:2023/
DAM 1
ISO/TC 67/SC 7
Oil and gas industries including
Secretariat: BSI
lower carbon energy — Site-
specific assessment of mobile
Voting begins on:
offshore units —
Voting terminates on:
Part 1:
Jack-ups: elevated at a site
AMENDMENT 1
Industries du pétrole et du gaz, y compris les énergies à faible
teneur en carbone — Évaluation spécifique du site d'unités
mobiles en mer —
Partie 1: Plateformes auto-élévatrices : Surélévées sur un site
AMENDEMENT 1
ICS: 75.180.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
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POTENTIAL TO BECOME STANDARDS TO
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NATIONAL REGULATIONS.
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Published in Switzerland Reference number
ISO 19905-1:2023/DAM 1:2024(en)
ii
ISO 19905-1:2023/DAM 1:2024(en)
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,
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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).
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constitute an endorsement.
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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 www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 67, Oil and gas industries including lower
carbon energy, Subcommittee SC 7, Offshore structures, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 12, Oil and gas industries including lower carbon energy,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 19905 series can be found on the ISO website.
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.
iii
ISO 19905-1:2023/DAM 1:2024(en)
Oil and gas industries including lower carbon energy — Site-
specific assessment of mobile offshore units —
Part 1:
Jack-ups: elevated at a site
AMENDMENT 1
A.12.5.2.1
Replace Formula (A.12.5-3) with the following:
T
u
F =−1 F (A.12.5-3)
yT, y
T /γ
()
vR,Tv
A.12.5.5.3
Replace the text with the following:
A.12.5.5.3 Combined axial tension or compression, bending, shear and torsion strength check
The effect of shear on the strength of tubular members subjected to axial tension or compression or bending
should be taken into account using the applicable formula given in this clause.
The tensile strength, AF , is given by Formula (A.12.5-21)
y,T,v
V
if ≤04,
V
P
AF =−1,,000 0 104 AF
v
yT,,v yT,
P
v
γ
RT, v
γ
RT, v
V
if 04,,00<≤ 80
V
P
AF =−1,,117 0 396 AF
v
yT,,v yT,
P
v
γ
RT, v
γ
RT, v
V
if 08,,00<≤ 96
V
P
AF =−1,,600 1 000 AF
v
yT,,v yT,
P
v
γ
RT, v
γ
RT, v
V
if >09, 6
V
P
AF =−4,,000 3 500 AF
(A.12.5-21)
v
yT,,v yT,
P
v
γ
RT, v
γ
RT, v
ISO 19905-1:2023/DAM 1:2024(en)
the representative local buckling strength, P , is given by Formula (A.12.5-22):
yc,v
V
if ≤04,
V
P
P =−1,,000 0 104 P
v
yc,v yc
P
v
γ
RT, v
γ
RT, v
V
if 04,,00<≤ 80
V
P
P =−1,,117 0 396 P
v
yc,v yc
P
v
γ
RT, v
γ
RT, v
V
if 08,,00<≤ 96
V
P
P =−1,,600 1 000 P
v
yc,v yc
P
v
γ
RT, v
γ
RT, v
V
if >09, 6
V
P
P =−4,,000 3 500 P
(A.12.5-22)
v
yc,v yc
P
v
γ
RT, v
γ
RT, v
and the representative bending moment strength, M , is given by Formula (A.12.5-23):
b,v
V
if ≤05,
V
P
M =−1,,000 0 078 M
v
bv, b
P
v
γ
RT, v
γ
RT, v
V
if 05,,00<≤ 85
V
P
M =−1,,103 0 284 M
v
bv, b
P
v
γ
RT, v
γ
RT, v
V
if 08,,50<≤ 98
V
P
M =−1,,489 0 739 M
v
bv, b
P
v
γ
RT, v
γ
RT, v
V
if >09, 8
V
P
M =−3,,621 2 914 M
(A.12.5-23)
v
bv, b
P
v
γ
RT, v
γ
RT, v
NOTE 1 Formulae (A.12.5-21), (A.12.5-22) and (A.12.5-23) demonstrate that, even when fully utilized in shear, the
reduced tensile strength and reduced local buckling strength equate to 50 % of their representative strengths and the
reduced bending strength to 70 % of the representative strength.
ISO 19905-1:2023/DAM 1:2024(en)
Consequently, combinations of axial tension, bending and shear should satisfy Formula (A.12.5-24):
05,
γ MM+
γ P ()
RT, buyuz
π
RT, tut
1−cos,+ ≤10 and γ P ≤ AF (A.12.5-24)
R,Tt ut y,T,v
2 AF M
yT,,v bv,
NOTE 2 If γ P > AF Equation (A.12.5-24) is not an appropriate measure of member utilization. A measure
R,Tt ut y,T,v
05,
γ MM+
γ P ()
R,Tb uy uz
R,Tt ut
of the member utilization, U, can be obtained by calculating U = +
AF M
y,T,v b,v
Combinations of axial compression, bending and shear should satisfy Formulae (A.12.5-25) and (A.12.5-26):
05,
γ MM+
γ P ()
RT, buay uaz
RT, cuc
+ ≤10, (A.12.5-25)
P M
a bv,
05,
γ MM+
γ P ()
RT, buyuz
π
RT, cuc
1−cos,+ ≤10 and γ PP≤ (A.12.5-26)
R,Tc uc yc,v
2 P M
yc,v bv,
In Formula (A.12.5-25), the axial compression strength, P , should be calculated from Formula (A.12.5-10)
a
using P instead of P .
yc,v yc
NOTE 3 If γ PP> then Formula (A.12.5-26) is not an appropriate measure of member utilization. A measure
R,Tc uc yc,v
05,
γ MM+
γ P ()
R,Tb uy uz
R,Tc uc
of the local strength member utilization, U, can be obtained by calculating U =+ .
P M
yc,v b,v
A.9.4.6.5.1
Replace the second paragraph with the following:
*
The simplified methods provide a ratio of normalized cyclic resistance ratio λ over normalized cyclic
CRR
*
stress ratio λ giving a margin against triggering of liquefaction, i.e.
CSR
**
f =λλ/
trig CRRCSR
A.9.4.6.5.2
Replace the text with the following:
A.9.4.6.5.2 Cyclic shear stress ratio and cyclic resistance ratio
[165] [101] [210]
Simplified methods Seed and Idriss (1971) , Idriss (1999) , Youd et al. (2001) , Zhang et al. (2002)
[214] [105]
, Idriss and Boulanger (2006) can be used to further assess the free-field liquefaction potential
*
within the upper part of the soil profile by estimating the normalized cyclic stress ratio (λ ) and
CSR
*
comparing it to the normalized cyclic resistance ratio (λ ) computed from cone penetration test
CRR
[139] [30]
resistance (Moss et al., 2006 ; Boulanger and Idriss, 2016 ) or in situ shear wave velocity (Kayen et al.,
[115] [156]
2013 ; Robertson, 2015 ).
* *
Possible free-field liquefaction assessment methods to calculate λ and λ are provided in Annex E.5.
CRR CSR
ISO 19905-1:2023/DAM 1:2024(en)
Table B-2
Replace the first row of the Table with:
γ partial material factor for calculated foundation capacities 1,25 E.4
m
Annex E
Delete the following that was included in ISO 19905-1 Corrected version of 2024-07:
CAUTION — The guidance in E.5 should not be used because inconsistencies have been identified.
The Clause will be corrected in an Amendment.
Clause E.5
Replace the text with the following:
E.5 Example of simplified free-field liquefaction assessment calculation method
E.5.1 General
Various methods are available for a simplified earthquake-induced liquefaction assessment. A simplified
*
method is proposed here in which the normalised Cyclic Resistance Ratio (λ ), based on either shear
CRR
*
wave velocity or cone resistance from CPT, is compared to the normalised Cyclic Stress Ratio (λ ) for a
CSR
* *
specific site. Liquefaction is indicated where the λ exceeds λ .
CSR CRR
*
E.5-2 Calculation of normalised cyclic resistance ratio (λλ ) based on soil shear wave velocity
CRR
When in situ soil shear wave velocity data are available, λ can be computed using the following approach
CRR
[115]
from Kayen et al. (2013) :
2,801 1
′ −1
()0,,007 32VM− 61680ln() − ,l009 9 n σ +00,,002 80R + 4809Φ
()
sw1 v0 FC
P
()
L
λ =exp (E.5-1)
CRR
1,946
where
V is the shear wave velocity, V (m/s), normalized to a vertical overburden stress of 1 atmosphere,
s1 s
equal to V C
sVs
where
02, 5
′
is a stress correction factor, equal to P /σ or a maximum value of 1,5 at shallow
()
av0
C
Vs
depths;
P is the atmospheric pressure (kPa);
a
M
is the earthquake moment magnitude;
w
′
is the vertical effective overburden stress relative to the sea floor (kPa);
σ
v0
ISO 19905-1:2023/DAM 1:2024(en)
R is the fines content (%) estimated from laboratory or CPT data, see also Formula (E.5-4). Note
FC
*
that the val
...
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