BS-EN-13645-2002.pdf

BRITISH STANDARD BS EN 13645:2002 Installations and equipment for liquefied natural gas Design of onshore installations with a storage capacity between 5 t and 200 t The European Standard EN 13645:2001 has the status of a British Standard ICS 75.180.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13645:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 05 March 2002 © BSI 05 March 2002 ISBN 0 580 39202 3 National foreword This British Standard is the official English language version of EN 13645:2001. The UK participation in its preparation was entrusted to Technical Committee GSE/38, Installation and equipment for liquefied natural gas, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 26, and an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13645 December 2001 ICS 75.200 English version Installations and equipment for liquefied natural gas - Design of onshore installations with a storage capacity between 5 t and 200 t Installations et équipements de gaz naturel liquéfié - Conception des installations terrestres d'une capacité de stockage comprise entre 5 t et 200 t Anlagen und Ausrüstung für Flüssigerdgas - Auslegung von landseitigen Anlagen mit einer Lagerkapazität zwischen 5 t und 200 t This European Standard was approved by CEN on 15 November 2001. 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 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13645:2001 E Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 2 Contents page Foreword3 Introduction.4 1Scope 5 2Normative references 5 3Terms and definitions6 4Environmental impact .7 4.1General7 4.2Emission control7 4.3Boil-off / flash gas management.7 4.4External communication networks 8 5Safety plan8 5.1Purpose.8 5.2Collection of data and information.8 5.3Threshold values .9 5.4Identification of risks.10 5.5Estimation of the consequences of a gas or LNG release 11 6General safety measures 12 6.1Leaks and spillage protection 12 6.2Overpressure protection.13 6.3Fire protection13 6.4Confinement.13 6.5Emergency shutdown13 6.6Commissioning and decommissioning.13 6.7Inspection.14 6.8Personnel14 7Design of vessels.14 7.1General14 7.2Insulation14 7.3Foundations14 7.4Instrumentation15 7.5Overpressure protection.15 7.6Impounding basin16 7.7LNG transfer.16 7.8Overflow16 7.9Distance between vessels.16 8Installation design .16 8.1Hazardous areas and restricted access area16 8.2Unloading and loading areas16 8.3Circulation and parking.17 8.4Location of facilities 17 8.5Lightning and earthing17 Annex A (informative) Schematic description of a process for a satellite and fuelling plant.18 Annex B (informative) Examples of safety scenarios and calculations 19 Annex C (informative) Examples of LNG storage vessels - Design concepts25 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 282 “Installation and equipment for LNG“, the secretariat of which is held by AFNOR. 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 June 2002, and conflicting national standards shall be withdrawn at the latest by June 2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Annexes A, B and C are informative. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 4 Introduction The objective of this standard is to give functional guidelines for LNG facilities with a total storage capacity between 5 t and 200 t. It recommends procedures and practices which will result in safe and environmentally acceptable design, construction and operation of LNG plants. This standard is not applicable to existing installations, but its application is recommended when major modifications are considered. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 5 1 Scope This European Standard specifies requirements for the design and construction of onshore stationary liquefied natural gas (LNG) installations with a total storage capacity between 5 t and 200 t. This standard is not applicable to liquefaction process facilities based on hydrocarbon refrigerants. Larger installations are treated according to EN 1473:1997. If other dangerous substances are present in the facility, the aforementioned storage capacity thresholds may be reduced. NOTEIt is essential that the designer refer to local regulation to determine the new values. The installations to which this standard is applicable include the following: ? LNG satellite plants. The LNG may be supplied by road tankers, barge or rail carriers. After storage, LNG is vaporized and sent out to consumers; ? LNG gas fuelling stations for vehicles. The installation is limited from the gas inlet or the loading LNG area to the gas outlet or the unloading LNG area. Filling systems are not covered here. For the purposes of clause 4 «Environment Impact» and clause 5 «Safety Plan», this standard applies where LNG storage capacity exceeds the threshold specified in the local regulation. If this value is not available, a threshold of 50 t is recommended. It is recalled that, in any case, local regulations prevail. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 1127-1, Explosive atmospheres- Explosion prevention and protection- Basic concepts and methodology. EN 1160:1996, Installation and equipment for liquefied natural gas - General characteristics of liquified natural gas. EN 1473:1997, Installation and equipment for liquefied natural gas - Design of onshore installations. EN 12066, Installation and equipment for liquefied natural gas - Testing of insulation linings for liquefied natural gas retention bunds. EN 60079-10, Electrical apparatus for explosive gas atmospheres- Part 10: Classification of hazardous areas (IEC 60079-10:1995). ENV 1991-2-2, EUROCODE 1 Basis of design and actions on structures - Part 2-2: Actions on structures - Actions on structures exposed to fire. ENV 1992-1-1, EUROCODE 2 Design of concrete structures - Part 1-1: General rules and rules for buildings. ENV 1992-1-2, EUROCODE 2 Design of concrete structures - Part 1-2: General rules - Structural fire design. ENV 1993-1-1, EUROCODE 3 Design of steel structures - Part 1-1: General rules and rules for buildings. ENV 1993-1-2, EUROCODE 3 Design of steel structures - Part 1-2: General rules - Structural fire design. ENV 1994-1-1, EUROCODE 4 Design of composite steel and concrete structures - Part 1-1: General rules and rules for buildings. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 6 ENV 1994-1-2, EUROCODE 4 Design of composite steel and concrete structures - Part 1-2: General rules - Structural fire design (including Technical Corrigendum 1:1995). 3 Terms and definitions For the purposes of this European Standard, the definitions given in EN 1160:1996 and EN 1473:1997, and the following terms and definitions apply. 3.1 above ground vessel vessel of which all or part is exposed above ground level 3.2 boil-off gas gas resulting from evaporation of LNG near its equilibrium state 3.3 emergency shutdown a system that safely and effectively stops the whole plant or individual units when an incident occurs 3.4 flash gas gas resulting from sudden evaporation of LNG out of equilibrium condition 3.5 impounding area an area defined through the use of dykes or topography at the site for the purpose of containing any accidental spill of LNG 3.6 LNG gas fuelling station installation including an LNG storage which supplies vehicles with LNG or gas from vaporized LNG 3.7 loading area area where LNG is loaded from storage vessels to transport vessels when the plant supplies LNG 3.8 local regulation set of rules, laws, national agreements, international conventions which apply to a site 3.9 operating personnel any person who is authorised to act on the control of the plant, remotely or locally NOTEIt can include the drivers of LNG carriers who supply the plant with LNG. In the case of fuelling stations for vehicles, drivers of these vehicles are not included unless it is specified in the management plan of the installation. 3.10 plant or site area inside of which public access is unauthorised 3.11 underground vessel vessel which is completely buried below the general ground level of the facility 3.12 unloading area area where LNG is unloaded from transport vessels to storage vessels when the plant is supplied with LNG 3.13 validated model model whose effectiveness has been demonstrated by LNG industrial tests through clearly identified procedures Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 7 4 Environmental impact 4.1 General An environmental impact study shall be carried out when the LNG storage capacity exceeds the threshold specified in the local regulation. If this value is not available, a threshold of 50 t is recommended. The impact study shall take into account any restrictions on the transportation of LNG. All emissions from the plant, that is, solid, liquid (including water), and gaseous (including noxious odours) shall be identified. Measures shall be implemented to ensure that normal and accidental emissions are harmless to persons, property, animals or vegetation. An effluent management policy shall be established if relevant. The requirements in the handling of any toxic materials shall be identified. Any increase in activity caused by operation shall also be assessed and undesirable levels of activities shall be eliminated if possible or minimized and restricted. The following items should be considered: ? noise levels; ? vibration levels; ? night working, effect of lights; ? gas flaring or venting; ? warming or cooling of water. NOTEFog may be created locally by atmospheric vaporizers. 4.2 Emission control The following shall be safely controlled: ? combustion products from compressor drivers, submerged vaporizers, fired heaters for regeneration; ? normal or accidental venting of gases; ? normal or accidental flaring of gases; ? oily water condensed during dryer regeneration or from machines; ? in the case of water-cooled equipment, hydrocarbon contamination of this water from leaking exchanger tubes; ? disposal of waste products (chemicals, waste oil and chlorinated organic compounds); ? vaporizer water; ? odorant chemicals. The standard of emissions control shall follow as a minimum specifications set by local regulation. 4.3 Boil-off / flash gas management Continuous flaring or venting shall be avoided. Boil-off gas can be recycled in a liquefaction process or included in the send-out gas to avoid waste gas during normal operation. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:03:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13645:2001 (E) 8 4.4 External communication networks Traffic rates of external roads, railways and waterway networks near the LNG plant shall be identified. 5 Safety plan 5.1 Purpose LNG installations shall be designed to minimize the risks to property and life outside and inside the plant. A safety plan shall be defined during the design of the plant or during a major modification when the LNG storage capacity excee