1、BRITISH STANDARD 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 ofa British Standard ICs 75.180.99 BS EN 13645:2002 Wk present to the responsible European committee
2、 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. - A list of organizations represented on this committee can be obtained on request to its secretary. Cr oss-r e fe
3、r enc e s 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 C
4、atalogue. 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. Summary of pages This document
5、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. O BSI 05 March 2002 ISBN O 580 39202 3 EUROPEAN STANDARD NORME EUROPENNE EUROPIS
6、CHE 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 quipements de gaz naturel liqufi - Conception des installations terrestres dune capacit de
7、 stockage comprise entre 5 t et 200 t Anlagen und Ausrstung fr Flssigerdgas - Auslegung von landseitigen Anlagen mit einer Lagerkapazitt 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 CENKENELEC Internal Regulations whic
8、h 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 Standa
9、rd 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 standard
10、s 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 EUROPISCHES KOMITEE FUR NORMUNG COMIT EUROPEN DE NORMALIS
11、ATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13645:2001 E EN 13645:2001 (E) Contents page Foreword 3 Introduction . 4 1 2 3 4 4.1 4.2 4.3 4.4 5 5.1 5.2 5.3 5.4
12、5.5 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8 8.1 8.2 8.3 8.4 8.5 Scope 5 Normative references 5 Terms and definitions 6 Environmental impact . 7 General 7 Emission control 7 Boil-off I flash gas management . 7 External communication networks 8 Safety plan 8 Purpose .
13、 8 Collection of data and information . 8 Threshold values . 9 Identification of risks . 10 Estimation of the consequences of a gas or LNG release 11 General safety measures 12 Leaks and spillage protection 12 Overpressure protection . 13 Fire protection 13 Confinement . 13 Emergency shutdown 13 Com
14、missioning and decommissioning . 13 Inspection . 14 Personnel 14 Design of vessels . 14 General 14 Insulation 14 Foundations 14 Instrumentation 15 Overpressure protection . 15 Impounding basin 16 LNG transfer . 16 Overflow 16 Distance between vessels . 16 Installation design . 16 Hazardous areas and
15、 restricted access area 16 Unloading and loading areas 16 Circulation and parking . 17 Location of facilities 17 Lightning and earthing 17 Annex A (informative) Schematic description of a process for a satellite and fuelling plant . 18 Annex B (informative) Examples of safety scenarios and calculati
16、ons 19 Annex C (informative) Examples of LNG storage vessels . Design concepts 25 2 EN 13645:2001 (E) 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 g
17、iven 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 CENKENELEC Internal Regulations, the national standards organizations o
18、f 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 informat
19、ive. 3 EN 13645:2001 (E) 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 opera
20、tion of LNG plants. This standard is not applicable to existing installations, but its application is recommended when major modifications are considered. 4 EN 13645:2001 (E) 1 Scope This European Standard specifies requirements for the design and construction of onshore stationary liquefied natural
21、 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, t
22、he aforementioned storage capacity thresholds may be reduced. NOTE It 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, b
23、arge 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 cla
24、use 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 Normativ
25、e 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
26、 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 1 1 27- 1 , Explosive atmospheres- Explosion prevention and protection- Basic conc
27、epts and methodology. EN 1 160: 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 nat
28、ural gas - Testing of insulation linings for liquefied natural gas retention bunds. EN 60079-1 O, Electrical apparatus for explosive gas atmospheres- Part IO: Classification of hazardous areas (IEC 60079- IO: 1995). ENV 1991-2-2, EUROCODE 1 Basis of design and actions on structures - Part 2-2: Actio
29、ns 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 Desi
30、gn 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 buildin
31、gs. 5 EN 13645:2001 (E) ENV 1994-1-2, EUROCODE 4 Design of composite steel and concrete structures - Part 1-2: General rules - Structural fire design (including Technical Corrigendum I: 1995). 3 Terms and definitions For the purposes of this European Standard, the definitions given in EN 1160:1996 a
32、nd 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 wh
33、ole 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 f
34、uelling 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
35、 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 NOTE drivers of these vehicles are not included unless it is specified in the management plan of the installation. It can include the drivers of LNG carrier
36、s who supply the plant with LNG. In the case of fuelling stations for vehicles, 3.10 plant or site area inside of which public access is unauthorised 3.1 1 underground vessel vessel which is completely buried below the general ground level of the facility 3.12 unloading area area where LNG is unload
37、ed 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 6 EN 13645:2001 (E) 4 Environmental impact 4.1 General An environmental impact study sha
38、ll 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,
39、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 requ
40、irements 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: - vibra
41、tion levels; - night working, effect of lights; - gas flaring or venting; - warming or cooling of water. NOTE Fog may be created locally by atmospheric vaporizers. 4.2 Emission control The following shall be safely controlled: - com bustion products from compressor drivers, submerged vaporizers, fir
42、ed 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
43、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.
44、Boil-off gas can be recycled in a liquefaction process or included in the send-out gas to avoid waste gas during normal operation. 7 EN 13645:2001 (E) 4.4 External communication networks Traffic rates of external roads, railways and waterway networks near the LNG plant shall be identified. 5 Safety
45、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 exceeds the threshold specified in the local regula
46、tion. If this value is not available, a threshold of 50 t is recommended. The safety plan shall include an identification of risks and an appropriate appraisal of the consequences. It shall also include the safety measures and principles of the actions performed by the operator for controlling risks
47、 for accidents. Implementation of the safety plan shall be initiated as early as possible and be reviewed when unacceptable risks are identified during the design. A hazards and operability study (HAZOP or equivalent) shall be conducted to identify and eliminate or minimise hazards. Annex A illustra
48、tes the schematic description of the process related to an LNG satellite and fuelling plant. This description is simplified and it is not considered to be directly applicable for an actual project. 5.2 Collection of data and information Initially all available data and information shall be assembled
49、. It should be related to: - natural conditions: - soil characteristics: - meteorological conditions, to include at least atmospheric temperature and wind statistics, occurrence of lightning strikes, relative humidity, atmospheric stability; - flooding risks; - seismic activity; - topography; - vegetation for identification of fire risks; - surrounding integration: - surrounding infrastructure (e. g. industrial sites, built-up areas); - access for possible LNG trucks; - location of nearest fire services. When the available information is not sufficient enough to identify t
