BS EN 14620-1-2006 Design and manufacture of site built vertical cylindrical flat-bottomed steel tanks for the storage of refrigerated liquefied gases with operating temperatures b.pdf

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2、ing temperatures between 0 C and p165 C Part 1: GeneralThe European Standard EN 14620-1:2006 has the status of a British StandardICS 23.020.10Design and manufacture of site built, vertical, BRITISH STANDARDBS EN 14620-1:2006BS EN 14620-1:2006This British Standard was published under the authority of

3、 the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006ISBN 0 580 49775 5Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National fo

4、rewordThis British Standard was published by BSI. It is the UK implementation of EN 14620-1:2006. It supersedes BS 7777-1:1993 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PVE/15, Storage tanks for the petroleum industry.A list of organizations repr

5、esented on PVE/15 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14620-1 September 2006 ICS 23.020.10 English Version Design and manufacture of site built, vertical, cylin

6、drical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 C and -165 C -Part 1: General Conception et fabrication de rservoirs en acier fond plat, verticaux, cylindriques, construits sur site, destins au stockage de gaz rfrigrs, liqufis,

7、 dont les tempraturesde service sont comprises entre 0 C et -165 C - Partie 1: Gnralits Auslegung und Herstellung standortgefertigter, stehender, zylindrischer Flachboden-Stahltanks fr die Lagerung von tiefkalt verflssigten Gasen bei Betriebstemperaturen zwischen 0 C und -165 C - Teil 1: Allgemeines

8、 This European Standard was approved by CEN on 20 February 2006. 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 r

9、eferences concerning such national standards may be obtained on application to the Central Secretariat 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 membe

10、r into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithu

11、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006

12、 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14620-1:2006: EEN 14620-1:2006 (E) 2 Contents Page Foreword. 3 1 Scope 4 2 Normative references . 4 3 Terms and definitions. 5 4 Concept selection . 9 4.1 Types of tank . 9 Figure 1

13、Examples of single containment tanks 11 Figure 2 Examples of double containment tanks 12 Figure 3 Examples of full containment tanks. 13 Figure 4 Example of membrane tank. 14 4.2 Risk assessment. 14 5 Quality assurance and quality control 17 6 Health, safety and environment plan 17 7 General design

14、considerations . 17 7.1 General. 17 7.2 Protection systems. 21 7.3 Actions (loadings). 23 8 Inspection and maintenance 27 Annex A (informative) Physical properties of gases. 28 Table A.1 Physical properties of pure gases 28 Annex B (normative) Design information. 29 Annex C (normative) Seismic analy

15、sis . 31 Annex D (informative) Tank heating system 34 Bibliography . 36 EN 14620-1:2006 (E) 3 Foreword This European Standard (EN 14620-1:2006) has been prepared by Technical Committee CEN/TC 265 “Site built metallic tanks for the storage of liquids”, the secretariat of which is held by BSI. This Eu

16、ropean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2007, and conflicting national standards shall be withdrawn at the latest by March 2007. EN 14620 Design and manufacture of site built, vertical, cyl

17、indrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 C and -165 C consists of the following parts: Part 1: General; Part 2: Metallic components; Part 3: Concrete components; Part 4: Insulation components; Part 5: Testing, drying,

18、purging and cool-down. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ire

19、land, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14620-1:2006 (E) 4 1 Scope This European Standard is a specification for vertical, cylindrical tanks, built on site, above ground a

20、nd of which the primary liquid container is made of steel. The secondary container, if applicable, may be of steel or of concrete or a combination of both. An inner tank made only of pre-stressed concrete is excluded from the scope of this European Standard. This European Standard specifies principl

21、es and application rules for the structural design of the “containment” during construction, testing, commissioning, operation (accidental included), and decommissioning. It does not address the requirements for ancillary equipment such as pumps, pumpwells, valves, piping, instrumentation, staircase

22、s etc. unless they can affect the structural design of the tank. This European Standard applies to storage tanks designed to store products, having an atmospheric boiling point below ambient temperature, in a dual phase, i.e. liquid and vapour. The equilibrium between liquid and vapour phases being

23、maintained by cooling down the product to a temperature equal to, or just below, its atmospheric boiling point in combination with a slight overpressure in the storage tank. The maximum design pressure of the tanks covered by this European Standard is limited to 500 mbar. For higher pressures, refer

24、ence can be made to EN 13445, Parts 1 to 5. The operating range of the gasses to be stored is between 0 C and 165 C. The tanks for the storage of liquefied oxygen, nitrogen and argon are excluded. The tanks are used to store large volumes of hydrocarbon products and ammonia with low temperature boil

25、ing points, generally called “Refrigerated Liquefied Gases” (RLGs). Typical products stored in the tanks are: methane, ethane, propane, butane, ethylene, propylene, butadiene (this range includes the LNGs and LPGs). NOTE Properties of the gases are given in Annex A. The requirements of this European

26、 Standard cannot cover all details of design and construction because of the variety of sizes and configurations that may be employed. Where complete requirements for a specific design are not provided, the intention is for the designer, subject to approval of the purchasers authorized representativ

27、e, to provide design and details that are as safe as those laid out in this European Standard. This European Standard specifies general requirements for the tank concept, selection and general design considerations. 2 Normative references The following referenced documents are indispensable for the

28、application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1991-1-4, Eurocode 1: Actions on structures Part 1-4: Wind actions EN 1991-1-6, Eurocode 1: Action

29、s on structures Part 1-6: General actions Actions during execution EN 1992-1-1:2004, Eurocode 2: Design of concrete structures Part 1-1: General rules and rules for buildings EN 1997-1:2004, Eurocode 7: Geotechnical design Part 1: General rules EN 14620-1:2006 (E) 5 EN 1998-1:2004, Eurocode 8: Desig

30、n of structures for earthquake resistance Part 1: General rules, seismic actions and rules for buildings ENV 1998-4:1998, Eurocode 8: Design provisions for earthquake resistance of structures Part 4: Silos, tanks and pipelines EN 14620-2:, Design and manufacture of site built, vertical, cylindrical,

31、 flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 C and 165 C Part 2: Metallic components EN 14620-3:2006, Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied

32、 gases with operating temperatures between 0 C and 165 C Part 3: Concrete components EN 14620-4, Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 C and 165 C Part 4: Insulatio

33、n components EN 14620-5, Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 C and 165 C Part 5: Testing, drying, purging and cool-down 3 Terms and definitions For the purposes o

34、f this European Standard, the following terms and definitions apply. 3.1 action a) set of forces (loads) applied to the structure (direct action) b) set of imposed deformation or accelerations caused for example, by temperature changes, moisture variation, uneven settlement or earthquakes (indirect

35、action) 3.2 annular space space between the inner shell and outer shell or wall of self-supporting tanks 3.3 base slab continuous concrete base supporting the tank (either on the ground or elevated) 3.4 boil-off process of vaporization of refrigerated liquid by heat conducted through the insulation

36、surrounding the storage tank 3.5 bund wall low construction of earth or concrete surrounding the storage tank at a considerable distance to contain spilled liquid 3.6 polymeric vapour barrier reinforced or un-reinforced polymeric layer applied to the concrete to function as a product vapour, water v

37、apour and in some cases as liquid barrier EN 14620-1:2006 (E) 6 3.7 contractor company with which the purchaser agrees a proposal for the design, construction, testing and commissioning of a tank 3.8 design pressure maximum permissible pressure 3.9 design negative pressure maximum permissible negati

38、ve pressure (vacuum) 3.10 design metal temperature minimum temperature for which the metal component is designed NOTE It may be the minimum design temperature (in the case of the primary container) or a higher calculated temperature. 3.11 double containment tank see 4.1.2 3.12 foundations elements o

39、f the construction that comprise the base slab, ring-wall or pile system required to support the tank and contents 3.13 full containment tank see 4.1.3. NOTE The secondary container contains the vapour in normal operation and ensures controlled venting in the case of a primary container leakage. 3.1

40、4 hazard event having the potential to cause harm, including ill health and injury, damage to property, products or the environment, production losses or increased liabilities 3.15 inner tank metallic self-supporting cylindrical primary container 3.16 insulation space volume containing insulation ma

41、terial in the tank annular space, and between the tank bottoms or roofs 3.17 liner metallic plate installed against the inside of the concrete outer tank, impervious to product vapour and water vapour 3.18 load bearing insulation thermal insulation with special properties capable of transferring loa

42、ds to the appropriate load bearing structures EN 14620-1:2006 (E) 7 3.19 lodmat lowest one-day average ambient temperature. Note The average temperature is half the sum of the maximum and minimum temperature 3.20 maximum design liquid level maximum liquid level that will be maintained during operati

43、on of the tank used for the static shell thickness determination 3.21 maximum normal operating level Maximum liquid level that will be maintained during normal operation of the tank. Normally the level at which the first high level alarm is set 3.22 membrane thin metallic primary container of a memb

44、rane tank 3.23 membrane tank containment whereby a membrane (primary container) together with load bearing thermal insulation and a concrete tank are forming jointly an integrated, composite tank structure 3.24 minimum design temperature assumed temperature of the product, specified by the purchaser

45、, for which the tank is designed NOTE This temperature may be lower than the actual product temperature. 3.25 Operating Basis Earthquake (OBE) maximum earthquake event for which no damage is sustained and restart and safe operation can continue NOTE This event would result in no loss to the operatio

46、nal integrity and public safety is assured. 3.26 outer tank self-supporting cylindrical secondary container made of steel or concrete 3.27 purchaser company who gives an order to the contractor for the design, construction and testing of a tank 3.28 primary liquid container part of a single, double,

47、 full containment or membrane tank that contains the liquid during normal operation 3.29 product vapour barrier polymeric vapour barrier or a liner to prevent escape of product vapours from the tank 3.30 ringbeam circular support under the shell of the tank EN 14620-1:2006 (E) 8 3.31 roll-over uncon

48、trolled mass movement of stored liquid, correcting an unstable state of stratified liquids of different densities and resulting in a significant evolution of product vapour 3.32 roof structure on top of a shell or wall containing the vapour pressure and sealing off the contents from the atmosphere 3

49、.33 Safe Shutdown Earthquake (SSE) maximum earthquake event for which the essential fail-safe functions and mechanisms are designed to be preserved NOTE Permanent damage can be accepted, but without the loss of overall integrity and containment. The tank would not remain in operation without a detailed examination and structural assessment. 3.34 secondary liquid container part of the outer container of a double, full containment or membrane tank that contains