1、September 2017 English price group 31No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.100.99!%muW“2748252www.din.
2、deDIN EN 14359Gasloaded accumulators for fluid power applications;English version EN 14359:2017,English translation of DIN EN 14359:2017-09Hydrospeicher fr Hydraulikanwendungen;Englische Fassung EN 14359:2017,Englische bersetzung von DIN EN 14359:2017-09Accumulateurs hydropneumatiques pour transmiss
3、ions hydrauliques;Version anglaise EN 14359:2017,Traduction anglaise de DIN EN 14359:2017-09SupersedesDIN EN 14359:201104www.beuth.deDocument comprises 100 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.08.17 DIN EN 14359:2017
4、-09 2 A comma is used as the decimal marker. National foreword This document (EN 14359:2017) has been prepared by Technical Committee CEN/TC 54 “Unfired pressure vessels” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was DIN-Normenausschuss Maschinenbau
5、(DIN Standards Committee Mechanical Engineering), Working Committee NA 060-36-19 AA “Hydraulic accumulators (SpA CEN/TC 54/WG 5 and ISO/TC 131/WG 1)” of Section “Hydraulic fluid power”. Representatives of manufacturers and users of hydraulic accumulators, and of the employers liability insurance ass
6、ociations contributed to this standard. The European Standards referred to in Clause 2 and in the Bibliography of the EN have been published as the corresponding DIN EN or DIN EN ISO Standards with the same number. Where the International Standards referred to are not also DIN ISO Standards with the
7、 same number, there are no national standards available. Amendments This standard differs from DIN EN 14359:2011-04 as follows: a) in general, references have been aligned to the new Pressure Equipment Directive 2014/68/EU; b) the Scope has been broadened so as not to specifically exclude accumulato
8、rs containing Group 1 liquids or gases; c) in Table 3, the maximum allowable values of the nominal design stress for fine grained and heat treated steels have been included; d) in 7.6 “Fatigue performance evaluation”, the normative text has been refined; e) in the annexes, conformity assessment modu
9、les and activities have been removed from this edition; f) in normative Annexes C to F, more information is provided; g) informative Annexes B and ZA have been updated to take into account the new Pressure Equipment Directive 2014/68/EU. Previous editions DIN EN 14359: 2007-02, 2011-04 EUROPEAN STAN
10、DARD NORME EUROPENNE EUROPISCHE NORM EN 14359 April 2017 ICS 23.100.99 Supersedes EN 14359:2006+A1:2010English Version Gas-loaded accumulators for fluid power applications Accumulateurs hydropneumatiques pour transmissions hydrauliques Hydrospeicher fr Hydraulikanwendungen This European Standard was
11、 approved by CEN on 2 January 2017. 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 nat
12、ional standards may be obtained on application to the CEN-CENELEC 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 lang
13、uage and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN 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
14、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NO
15、RMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14359:2017 EEN 14359:2017 (E) 2 Contents Page European foreword 4 1 Scope 5 2 Normative references 5 3 Term
16、s, definitions, symbols and units 6 3.1 Terms and definitions . 6 3.2 Symbols and units . 7 4 Materials 9 4.1 Requirements for metallic materials. 9 4.2 Material certificates for components of the pressure containing envelope 9 5 Basic design and calculation criteria . 10 5.1 General 10 5.2 Corrosio
17、n . 10 5.3 Qualification by similarity . 10 5.4 Design methods . 10 5.5 Design and calculation methods common to all accumulator types 13 5.6 Specific design criteria for piston accumulators . 23 5.7 Specific design criteria for diaphragm accumulators 35 5.8 Specific design criteria for oil ports ma
18、inly used in bladder type accumulators 43 6 Manufacture 45 6.1 General 45 6.2 Special manufacturing processes for welded diaphragm accumulators 45 6.3 Forming of bladder accumulator shells 48 7 Inspection and testing . 50 7.1 General 50 7.2 Design documentation 51 7.3 Design review and design verifi
19、cation 51 7.4 Inspection during manufacture . 51 7.5 Hydrostatic pressure test 52 7.6 Fatigue performance evaluation . 52 7.7 Marking and labelling . 67 7.8 Documentation 69 8 Safety instructions and equipment for accumulators . 69 8.1 Introduction 69 8.2 Safety equipment 70 8.3 Tests and examinatio
20、ns before first operation 72 8.4 Supervision and maintenance 73 Annex A (informative) Examples of safety equipment configuration . 74 A.1 Example 1 74 A.2 Example 2 75 A.3 Example 3 76 A.4 Example 4 77 DIN EN 14359:2017-09 EN 14359:2017 (E) 3 A.5 Example 5 78 A.6 Example 6 79 A.7 Example 7 80 Annex
21、B (informative) Manufacturers declaration of conformity form . 81 Annex C (informative) Basics of statistics and probability analysis of fatigue test results 82 C.1 General . 82 C.2 Basics 82 Annex D (informative) Example of the application of the fatigue test method . 86 D.1 General . 86 D.2 In-ser
22、vice range of pressure . 86 D.3 Fatigue test conditions 86 D.4 Fatigue test results: 87 D.5 Statistical interpretation of data . 87 D.6 Estimation of the N-S curve (allowable number of cycles curve) 88 D.7 Interpretation of the fatigue data results for qualification . 89 D.8 Using the result for the
23、 qualification of a similar forged accumulator of 10 litre capacity 89 Annex E (informative) Example of similarity analysis . 91 Annex F (informative) Preliminary choice of Ptestiand extrapolation limits of S-N curve 93 F.1 Preliminary choice of Ptesti93 F.2 Extrapolation limits of S-N curve 95 Anne
24、x ZA (informative) Relationship between this European Standard and the Essential Requirements of Directive 2014/68/EU aimed to be covered 96 Bibliography . 97 DIN EN 14359:2017-09 EN 14359:2017 (E) 4 European foreword This document (EN 14359:2017) has been prepared by Technical Committee CEN/TC 54 “
25、Unfired pressure vessels”, the secretariat of which is held 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 October 2017 and conflicting national standards shall be withdrawn at the latest
26、 by October 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14359:2006+A1:2010. This document has be
27、en prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. In comparison with EN 1435
28、9:2006+A1:2010, the following modifications have been made: In general, references have been aligned to the new Pressure Equipment Directive 2014/68/EU; the Scope has been broadened so as not to specifically exclude accumulators containing Group 1 liquids or gases; Table 3 - Allowable design stress
29、values for fine grained and heat treated steels has been added; in subclause 7.6, Fatigue performance evaluation, the normative text has been refined; more information is provided in the informative Annexes C to F; in the Annexes: Conformity assessment modules and activities have been removed from t
30、his edition; informative Annexes B and ZA have been updated to take into account the new Pressure Equipment Directive 2014/68/EU. Where appropriate, formulae and techniques are consistent with the requirements of EN 13445-3 but this European Standard is presumed to satisfy the essential requirements
31、 of the Pressure Equipment Directive 2014/68/EU in its own right. NOTE If any matter of interpretation or doubt arises as to the meaning or effect of any normative part of this European Standard, or as to whether anything should be done or has been omitted to be done, in order that this European Sta
32、ndard should be complied with in full, the matter needs to be referred to the CEN/TC 54 Committee. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cy
33、prus, 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
34、the United Kingdom. DIN EN 14359:2017-09 EN 14359:2017 (E) 5 1 Scope 1.1 This European Standard specifies the requirements for materials, design, manufacture, testing inspection, safety equipment configuration and documentation (including instructions for first operation), for commonly-used types of
35、 gas-loaded accumulators and pressure vessels used to provide additional gas capacity for fluid power applications (see 1.2). 1.2 This European Standard applies to the following types of components, defined as the pressure-containing envelope of gas-loaded accumulators: bladder type; diaphragm type;
36、 piston type; transfer type; pressure vessels used to provide additional gas capacity. They consist of one or several parts joined together by a variety of mechanical means and by welding. 1.3 This European Standard applies to gas-loaded accumulators which operate with the following conditions: subj
37、ect to an internal gauge pressure greater than 0,5 bar; working temperature not lower than 50 C and not higher than +200 C; containing all liquids and gases as defined in the Pressure Equipment Directive 2014/68/EU, see Note. NOTE When the accumulator contains Group 1 liquids or gases, consideration
38、 relating to risks other than those required by Pressure Equipment Directive 2014/68/EU are not covered by this European Standard and will be assessed separately. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable fo
39、r its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10204, Metallic products - Types of inspection documents EN 13018, Non-destructive testing - Visual testing - General
40、principles EN 13445-2, Unfired pressure vessels - Part 2: Materials EN 13445-3:2014, Unfired pressure vessels - Part 3: Design EN 13445-4, Unfired pressure vessels - Part 4: Fabrication EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1) DIN EN 14359:2017
41、-09 EN 14359:2017 (E) 6 EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1) EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test m
42、ethod (ISO 6506-1) EN ISO 6506-2, Metallic materials - Brinell hardness test - Part 2: Verification and calibration of testing machines (ISO 6506-2) EN ISO 6506-3, Metallic materials - Brinell hardness test - Part 3: Calibration of reference blocks (ISO 6506-3) EN ISO 6892-1, Metallic materials - Te
43、nsile testing - Part 1: Method of test at room temperature (ISO 6892-1) EN ISO 15614-1, 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) ISO 262, ISO
44、 general purpose metric screw threads - Selected sizes for screws, bolts and nuts ISO 9110-1, Hydraulic fluid power - Measurement techniques - Part 1: General measurement principles ISO 9110-2, Hydraulic fluid power - Measurement techniques - Part 2: Measurement of average steady-state pressure in a
45、 closed conduit ISO 10771-1, Hydraulic fluid power - Fatigue pressure testing of metal pressure-containing envelopes - Part 1: Test method 3 Terms, definitions, symbols and units 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 gas-loaded
46、accumulator hydraulic accumulator with separator between liquid and gas where the liquid is pressurized using the compressibility of an inert gas (for example nitrogen) Note 1 to entry: The separator can be a bladder, a diaphragm or a piston. Note 2 to entry: Gas-loaded accumulators have shells, whi
47、ch can consist of cylinders, dished ends and flat plates. Openings are always isolated, located on the axis centre line and positioned at both ends of the accumulator. It is assumed that such vessels are axis-symmetrical. 3.1.2 bladder accumulator gas-loaded accumulator consisting of pressure-retain
48、ing shell, either spun-forged from seamless tube, hammer-forged from hollow bar or of welded construction, in which the liquid and gas are separated by a flexible bag or bladder normally retained at one end of the shell DIN EN 14359:2017-09 EN 14359:2017 (E) 7 3.1.3 diaphragm accumulator gas-loaded
49、accumulator consisting of pressure-retaining shell assembly, in which the construction can either be screwed or welded, with integral ports in which the liquid and gas are separated by a flexible membrane normally retained at its largest diameter to the shell 3.1.4 piston accumulator gas-loaded accumulator consisting of cylinder body and end cap assemblies in which the liquid and gas are separated by a rigid sliding piston 3.1.5 transfer type accumulator gas-l
