1、BRITISH STANDARD BS EN 14620-2:2006 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 p165 C Part 2: Metallic components The European Standard EN 14620-2:2006 has the sta
2、tus of a British Standard ICS 23.020.10 BS EN 14620-2:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006 ISBN 0 580 49776 3 National foreword This British Standard was published by BSI. It is the UK implementation
3、of EN 14620-2:2006. It supersedes BS 7777-2:1993 which is withdrawn.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 represented on PVE/15 can be obtained on request to its secretary. This publicat
4、ion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENN
5、E EUROPISCHE NORM EN 14620-2 September 2006 ICS 23.020.10 English Version 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 2: Metallic components Concepti
6、on et fabrication de rservoirs en acier fond plat, verticaux, cylindriques, construits sur site, destins au stockage des gaz rfrigrs, liqufis, dont les tempratures de service sont comprises entre 0 C et - 165 C - Partie 2 : Constituants mtalliques Auslegung und Herstellung standortgefertigter, stehe
7、nder, zylindrischer Flachboden-Stahltanks fr die Lagerung von tiefkalt verflssigten Gasen bei Betriebstemperaturen zwischen 0 C und -165 C - Teil 2: Metallische Bauteile This European Standard was approved by CEN on 20 February 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regu
8、lations 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 Central Secretariat or to any CEN member. This E
9、uropean 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 Central Secretariat has the same status as the official versions. CEN members are the n
10、ational standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
11、Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14620-2:2006:
12、 EEN 14620-2:2006 (E) 2 Contents Page Foreword. 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions. 7 4 Materials. 8 4.1 General. 8 4.2 Temperatures 8 4.3 Primary and secondary liquid container 8 Table 1 Product and steel class. 9 Table 2 Minimum Charpy V-notch impact test energy 11 4.4
13、Vapour container/outer tank 11 Table 3 Steel for vapour container/outer tank 12 4.5 Other components 12 5 Design 13 5.1 Design theory 13 Table 4 Determination of the maximum allowable design stress 14 Table 5 Partial load and material factors for types I, II, III and IV steel 16 5.2 Primary and seco
14、ndary liquid container 16 Figure 1 Typical bottom layout 18 Table 6 Minimum shell plate thickness. 20 Figure 2 Design flowchart for membranes . 23 Table 7 k factors for S-N curves (normal distribution assumed) . 28 5.3 Vapour container (outer tank) 29 Figure 3 Typical shell-roof compression areas 32
15、 Table 8 Minimum size of top corner ring 33 5.4 Suspended roof. 33 5.5 Nozzles. 33 Figure 4 Typical roof nozzle with thermal distance piece. 35 5.6 Primary and secondary containment, bottom connections . 36 5.7 Connections between containers 36 5.8 Other details 36 6 Fabrication. 38 6.1 Handling of
16、materials 38 6.2 Plate preparation and tolerances 38 6.3 Tolerances . 39 Table 9 Radius tolerances 39 Table 10 Maximum differences between the design and the as built profile 40 Table 11 Tolerance limits on local deformation in welds 40 Figure 5 Outward and inward peaking 41 EN 14620-2:2006 (E) 3 Fi
17、gure 6 Gauge for measuring peaking. 41 Table 12 Misalignment at vertical joints 42 6.4 Roof 42 6.5 Temporary attachments . 42 7 Welding procedures 42 7.1 General. 42 7.2 WPAR requirements . 43 7.3 Impact testing 43 7.4 9 % Nickel steel . 43 7.5 Welders and welding operators. 44 7.6 Production test p
18、lates 44 8 Welding 45 8.1 Tack and temporary welds. 45 8.2 Atmospheric conditions. 45 8.3 Preheating 45 8.4 Post-weld heat treatment . 45 Table 13 Holding times at lower temperatures. 46 9 Inspection 47 9.1 Qualification of NDE personnel . 47 9.2 Inspection procedures 47 9.3 Type of inspections 47 T
19、able 14 Weld inspections of primary and secondary liquid container 48 Table 15 Extent of radiographic/ultrasonic examination of shell welds of primary and secondary liquid container 48 Table 16 Inspection of vapour barrier/liner. 50 Table 17 Extent of radiographic and ultrasonic examination of shell
20、 plate welds of vapour containers . 51 9.4 Visual inspection. 51 9.5 Dye penetrant examination 51 9.6 Magnetic particle examination. 51 9.7 Vacuum box examination. 51 9.8 Ammonia tightness test . 52 9.9 Soap bubble examination 52 9.10 Radiographic examination . 52 9.11 Ultrasonic examination. 53 9.1
21、2 Acceptance criteria. 53 9.13 Unacceptable defects in horizontal welds53 9.14 Acceptable thinning after grinding . 54 Annex A (informative) Actions on membrane 55 Table A.1 Static action 55 Table A.2 Cyclic action . 55 Table A.3 Accidental action 55 Annex B (informative) Determination of the load a
22、nd fatigue curves for membrane 56 Figure B.1 Flowchart for membranes 56 Bibliography . 57 EN 14620-2:2006 (E) 4 Foreword This European Standard (EN 14620-2:2006) has been prepared by Technical Committee CEN/TC 265 “Site built metallic tanks for the storage of liquids”, the secretariat of which is he
23、ld by BSI. 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 March 2007, and conflicting national standards shall be withdrawn at the latest by March 2007. EN 14620 Design and manufacture of site bu
24、ilt, vertical, cylindrical, 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:
25、 Testing, drying, 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, Hun
26、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14620-2:2006 (E) 5 1 Scope This European Standard specifies general requirements for the materials, design, const
27、ruction and installation of the metallic components of refrigerated liquefied gas storage tanks. This European Standard deals with the design and manufacture of site built, vertical, cylindrical, flat- bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures
28、between 0 C and 165 C. 2 Normative references The following referenced documents are indispensable for the 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) app
29、lies. EN 287-1, Qualification test of welders Fusion welding Part 1: Steels EN 462-1, Non-destructive testing Image quality of radiographs Part 1: Image quality indicators (wire type) Determination of image quality value EN 462-2, Non-destructive testing Image quality of radiographs Part 2: Image qu
30、ality indicators (step/hole type) Determination of image quality value EN 473, Non-destructive testing Qualification and certification of NDT personnel General principles EN 571-1, Non-destructive testing Penetrant testing Part 1: General principles EN 584-1, Non-destructive testing Industrial radio
31、graphic film Part 1: Classification of film systems for industrial radiography EN 584-2, Non-destructive testing Industrial radiographic film Part 2: Control of film processing by means of reference values EN 875, Destructive tests on welds in metallic materials Impact tests Test specimen location,
32、notch orientation and examination EN 970, Non-destructive examination of fusion welds Visual examination EN 1011-2, Welding Recommendations for welding of metallic materials Part 2: Arc welding of ferritic steels EN 1092-1:2001, Flanges and their joints Circular flanges for pipes, valves, fittings a
33、nd accessories, PN designated Part 1: Steel flanges EN 1290, Non-destructive testing of welds Magnetic particle testing of welds EN 1418, Welding personnel Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic mate
34、rials EN 1435:1997, Non-destructive examination of welds Radiographic examination of welded joints EN 1515-1:1999, Flanges and their joints Bolting Part 1: Selection of bolting EN 1593, Non-destructive testing Leak testing Bubble emission techniques EN 14620-2:2006 (E) 6 EN 1712:1997, Non-destructiv
35、e testing of welds Ultrasonic testing of welded joints Acceptance levels EN 1714:1997, Non-destructive testing of welds Ultrasonic testing of welded joints EN 1759-1:2004, Flanges and their joint Circular flanges for pipes, valves, fittings and accessories, Class designated Part 1: Steel flanges, NP
36、S 1/2 to 24 EN 1993-1-1, Eurocode 3: Design of steel structures Part 1-1: General rules and rules for buildings ENV 1993-1-6, Eurocode 3: Design of steel structures Part 1-6: General rules Supplementary rules for the strength and stability of shell structures ENV 1993-4-2:1999, Eurocode 3: Design of
37、 steel structures Part 4-2: Silos, tanks and pipelines Tanks EN 1994-1-1, Eurocode 4: Design of composite steel and concrete structures Part 1-1: General rules and rules for buildings EN 10025:2004 (all parts), Hot rolled products of non-alloy structural steels EN 10029:1991, Hot rolled steel plates
38、 3 mm thick or above Tolerances on dimensions, shape and mass EN 10045-1, Metallic materials Charpy impact test Part 1: Test method EN 10160:1999, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection method) EN 10204:2004, Metallic products Types of inspection
39、 documents EN 10216-1, Seamless steel tubes for pressure purposes Technical delivery conditions Part 1: Non-alloy steel tubes with specified room temperature properties EN 10216-2, Seamless steel tubes for pressure purposes Technical delivery conditions Part 2: Non-alloy and alloy steel tubes with s
40、pecified elevated temperature properties EN 10216-3, Seamless steel tubes for pressure purposes Technical delivery conditions Part 3: Alloy fine grain steel tubes EN 10216-4, Seamless steel tubes for pressure purposes Technical delivery conditions Part 4: Non-alloy and allow steel tubes with specifi
41、ed low temperature properties EN 10217-1, Welded steel tubes for pressure purposes Technical delivery conditions Part 1: Non-alloy steel tubes with specified room temperature properties EN 10217-2, Welded steel tubes for pressure purposes Technical delivery conditions Part 2: Electric welded non-all
42、oy and alloy steel tubes with specified elevated temperature properties EN 10217-3, Welded steel tubes for pressure purposes Technical delivery conditions Part 3: Alloy fine grain steel tubes EN 10217-4, Welded steel tubes for pressure purposes Technical delivery conditions Part 4: Electric welded n
43、on-alloy steel tubes with specified low temperature properties EN 10217-5, Welded steel tubes for pressure purposes Technical delivery conditions Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties EN 14620-2:2006 (E) 7 EN 10217-6, Welded steel
44、 tubes for pressure purposes Technical delivery conditions Part 6: Submerged arc welded non-alloy steel tubes with specified low temperature properties EN 10220, Seamless and welded steel tubes Dimensions and masses per unit length EN 12062:1997, Non-destructive examination of welds General rules fo
45、r metallic materials EN 14015:2004, Specification for the design and manufacture of site built, vertical, cylindrical, flat- bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above EN 14620-1:2006, Design and manufacture of site built, vertical, cylind
46、rical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0C and 165 C Part 1: General EN ISO 5817:2003, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections (ISO
47、5817:2003) EN ISO 15607:2003, Specification and qualification of welding procedures for metallic materials Part 1: General rules (ISO 15607:2003) EN ISO 15609-1:2004, Specification and qualification of welding procedures for metallic materials Welding procedure specification Part 1: Arc welding (ISO
48、 15609-1:2004) EN ISO 15614-1:2004, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004) ISO 261, ISO general purpose metric screw threads General plan ISO 965-2:1998, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality API 620:2004, Design and construction of large, welded, low-pressure storage tanks 3
