1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 19901-7:2013Petroleum and natural gas industries Specific r e q u i r e m e n t s f o r o f f s h o r e structuresPart 7: Stationkeeping systems for floating offshore s
2、tructures and mobile offshore unitsBS EN ISO 19901-7:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO19901-7:2013. It supersedes BS EN ISO 19901-7:2005 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/525/12
3、, Design of offshore structures.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution
4、 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 74671 0ICS 75.180.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2013.Amendments issued since
5、 publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19901-7 May 2013 ICS 75.180.10 Supersedes EN ISO 19901-7:2005English Version Petroleum and natural gas industries - Specific requirements for offshore structures - Part 7: Stationkeeping systems for floating offsh
6、ore structures and mobile offshore units (ISO 19901-7:2013) Industries du ptrole et du gaz naturel - Exigences spcifiques relatives aux structures en mer - Partie 7: Systmes de maintien en position des structures en mer flottantes et des units mobiles en mer (ISO 19901-7:2013)Erdl- und Erdgasindustr
7、ie - Spezielle Anforderungen an Offshore-Anlagen - Teil 7: Betriebssysteme fr das Positionshalten schwimmender Anlagen und mobiler Offshore-Einheiten (ISO 19901-7:2013) This European Standard was approved by CEN on 5 January 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulat
8、ions 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.
9、 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
10、members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Po
11、rtugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by
12、 any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19901-7:2013: EBS EN ISO 19901-7:2013EN ISO 19901-7:2013 (E) 3 Foreword This document (EN ISO 19901-7:2013) has been prepared by Technical Committee ISO/TC 67 “Materials, equipment and offshore structures for petroleum, petroche
13、mical and natural gas industries“ in collaboration with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national stand
14、ard, either by publication of an identical text or by endorsement, at the latest by November 2013, and conflicting national standards shall be withdrawn at the latest by November 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent right
15、s. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 19901-7:2005. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Sta
16、ndard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
17、pain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 19901-7:2013 has been approved by CEN as EN ISO 19901-7:2013 without any modification. BS EN ISO 19901-7:2013ISO 19901-7:2013(E) ISO 2013 All rights reserved iiiContents Page Foreword . vIntroduction . vii1
18、Scope 12 Normative references 23 Terms and definitions . 24 Symbols and abbreviated terms 74.1 Symbols 74.2 Abbreviated terms . 85 Overall considerations 95.1 Functional requirements. 95.2 Safety requirements 95.3 Planning requirements 105.4 Inspection and maintenance requirements 105.5 Analytical t
19、ools 106 Design requirements . 106.1 Exposure levels . 106.2 Limit states . 116.3 Defining design situations . 116.4 Design situations . 127 Actions 147.1 General . 147.2 Site-specific data requirements . 147.3 Environmental actions on mooring lines 157.4 Indirect actions 168 Mooring analysis . 188.
20、1 Basic considerations 188.2 Floating structure offset . 198.3 Floating structure response . 208.4 Mooring line response 258.5 Line tension . 268.6 Line length and geometry constraints 268.7 Anchor forces 278.8 Typical mooring configuration analysis and assessment 278.9 Thruster-assisted moorings .
21、288.10 Transient analysis of floating structure motions . 299 Fatigue analysis . 309.1 Basic considerations 309.2 Fatigue resistance . 309.3 Fatigue analysis procedure 3210 Design criteria 3710.1 Floating structure offset . 3710.2 Line tension limit . 3810.3 Grounded line length 3810.4 Anchoring sys
22、tems . 3810.5 Fatigue safety factor . 4110.6 Corrosion and wear . 4110.7 Clearances . 42BS EN ISO 19901-7:2013ISO 19901-7:2013(E) iv ISO 2013 All rights reserved10.8 Supporting structures .4211 Mooring hardware 4211.1 Mooring line components .4211.2 Winching equipment .4311.3 Monitoring equipment .4
23、312 In-service inspection, monitoring and maintenance 4412.1 General 4412.2 Mobile moorings 4412.3 Permanent moorings .4413 Dynamic positioning system 4613.1 Basic considerations .4613.2 Design and analysis 4713.3 Design, test and maintenance 4813.4 Operating personnel 4813.5 Determination of statio
24、nkeeping capability 4814 Synthetic fibre rope mooring 4814.1 Basic considerations .4814.2 Fibre rope mooring analysis .4914.3 Fatigue analysis .5014.4 Creep analysis 5014.5 Design criteria 5014.6 Model testing 51Annex A (informative) Additional information and guidance .52Annex B (informative) Regio
25、nal information . 169Bibliography . 176BS EN ISO 19901-7:2013ISO 19901-7:2013(E) ISO 2013 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards i
26、s 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 par
27、t in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to p
28、repare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility tha
29、t 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. ISO 19901-7 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natur
30、al gas industries, Subcommittee SC 7, Offshore structures. This second edition cancels and replaces the first edition (ISO 19901-7:2005), which has been technically revised. This second edition of ISO 19901-7 includes several major additions and changes, primarily to Annex A (informative). The large
31、st change is the addition of detailed informative text incorporated directly from API RP 2SK on all types of anchor design. In the first edition of this International Standard, this material was previously addressed only by reference to API RP 2SK. Informative material has also been added from API R
32、P 2SK regarding the analysis and mitigation of vortex-induced motions of large cylindrical hulls. Consequently, the normative text has been modified to remove reference to API RP 2SK and to cross-reference portions of the expanded informative annex. The other significant change is the updating of gu
33、idance on polyester rope mooring design to conform to the provisions of the recent amendment to API RP 2SM. The changes include new definitions of stiffness, recognition of effective filter barriers, removal of the prohibition against the rope touching the sea floor, and more detail on minimum tensi
34、on requirements, among others. Additionally, minor corrections were made to the text in 7.4.4 (Wind actions) and 8.3.4 (Riser considerations), and the terminology “most probable maximum“ has been standardized throughout. Finally, the Norwegian clause of Annex B has been updated at the request of Nor
35、way, and a new Canadian clause has been added. ISO 19901 consists of the following parts, under the general title Petroleum and natural gas industries Specific requirements for offshore structures: Part 1: Metocean design and operating considerations Part 2: Seismic design procedures and criteria Pa
36、rt 3: Topsides structure Part 4: Geotechnical and foundation design considerations Part 5: Weight control during engineering and construction Part 6: Marine operations Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units BS EN ISO 19901-7:2013ISO 19901-7:2013(E)
37、vi ISO 2013 All rights reservedThe following parts are under preparation: Part 8: Marine soil investigations ISO 19901 is one of a series of International Standards for offshore structures. The full series consists of the following International Standards: ISO 19900, Petroleum and natural gas indust
38、ries General requirements for offshore structures ISO 19901 (all parts), Petroleum and natural gas industries Specific requirements for offshore structures ISO 19902, Petroleum and natural gas industries Fixed steel offshore structures ISO 19903, Petroleum and natural gas industries Fixed concrete o
39、ffshore structures ISO 19904-1, Petroleum and natural gas industries Floating offshore structures Part 1: Monohulls, semi-submersibles and spars ISO 19905-1, Petroleum and natural gas industries Site-specific assessment of mobile offshore units Part 1: Jack-ups ISO/TR 19905-2, Petroleum and natural
40、gas industries Site-specific assessment of mobile offshore units Part 2: Jack-ups commentary and detailed sample calculation ISO 19905-3, Petroleum and natural gas industries Site-specific assessment of mobile offshore units Part 3: Floating units1) ISO 19906, Petroleum and natural gas industries Ar
41、ctic offshore structures 1) Under preparation. BS EN ISO 19901-7:2013ISO 19901-7:2013(E) ISO 2013 All rights reserved viiIntroduction The series of International Standards applicable to types of offshore structure, ISO 19900 to ISO 19906, constitutes a common basis covering those aspects that addres
42、s design requirements and assessments of all offshore structures used by the petroleum, petrochemical and natural gas industries worldwide. Through their application, the intention is to achieve reliability levels appropriate for manned and unmanned offshore structures, whatever type of structure an
43、d nature or combination of materials used. It is important to recognize that structural integrity is an overall concept comprising models for describing actions, structural analyses, design rules, safety elements, workmanship, quality control procedures and national requirements, all of which are mu
44、tually dependent. The modification of one aspect of design in isolation can disturb the balance of reliability inherent in the overall concept or structural system. The implications involved in modifications therefore need to be considered in relation to the overall reliability of all offshore struc
45、tural systems. The series of International Standards applicable to types of offshore structure is intended to provide wide latitude in the choice of structural configurations, materials and techniques without hindering innovation. Sound engineering judgement is therefore necessary in the use of thes
46、e International Standards. This part of ISO 19901 was developed in response to the worldwide offshore industrys demand for a coherent and consistent definition of methodologies to analyse, design and evaluate stationkeeping systems used for floating production and/or storage platforms of various typ
47、es (e.g. semi-submersibles, spar platforms, ship-shaped structures) and to assess site-specific applications of mobile offshore units (such as mobile offshore drilling units, pipelay units, construction units). Stationkeeping is a generic term covering systems for keeping a floating structure, which
48、 is under the constant influence of external actions, on a pre-defined location and/or heading with limited excursions. Stationkeeping systems resist external actions by means of any combination of the following: mooring systems (e.g. spread moorings or single point moorings); dynamic positioning sy
49、stems (generally consisting of thrusters). The external actions generally consist of wind, wave, current and ice actions on the floating structure, mooring and/or risers. Some background to, and guidance on, the use of this part of ISO 19901 is provided in informative Annex A. The clause numbering in Annex A is the same as in the normative text to facilitate cross-referencing. Regional information, where available, is provided in informative Annex B. BS EN ISO 19901-7:2013BS EN ISO 19901-7
