1、Aerospace series Flange couplings Gasket seal with nickel alloy C seal Technical specification Inch series BS EN 4816:2017 BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4816 May 2017 ICS 49.080 English Version
2、Aerospace series - Flange couplings - Gasket seal with nickel alloy C seal - Technical specification - Inch series Srie arospatiale - Raccordement bride - Joint plaque avec joint C en alliage de nickel - Spcification technique - Srie en inches Luft- und Raumfahrt - Rohrverschraubung mit Flanschen -
3、Flachdichtung aus Nickellegierung mit Armierung - Technische Lieferbedingung - Inch-Reihe This European Standard was approved by CEN on 7 November 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the stat
4、us 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, Ge
5、rman). A version in any other language made by translation under the responsibility of a CEN member into its own language 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, Croat
6、ia, Cyprus, 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, Turke
7、y and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG 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. Re
8、f. No. EN 4816:2017 E National foreword This British Standard is the UK implementation of EN 4816:2017. The UK participation in its preparation was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems. A list of organizations represented on this committee can be obtaine
9、d on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017 ISBN 978 0 580 95257 9 ICS 49.080Compliance with a
10、 British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2017. Amendments/corrigenda issued since publication Date Text affected BRITISH STANDARD BS EN 4816:2017 EUROPEAN STANDAR
11、D NORME EUROPENNE EUROPISCHE NORM EN 4816 May 2017 ICS 49.080 English Version Aerospace series - Flange couplings - Gasket seal with nickel alloy C seal - Technical specification - Inch series Srie arospatiale - Raccordement bride - Joint plaque avec joint C en alliage de nickel - Spcification techn
12、ique - Srie en inches Luft- und Raumfahrt - Rohrverschraubung mit Flanschen - Flachdichtung aus Nickellegierung mit Armierung - Technische Lieferbedingung - Inch-Reihe This European Standard was approved by CEN on 7 November 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulat
13、ions 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 CEN-CENELEC Management Centre or to any CEN member.
14、 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN
15、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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Po
16、rtugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitatio
17、n in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4816:2017 E BS EN 4816:2017EN 4816:2017 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions. 4 3.1 Pressure . 5 3.2 Coupling and assembling . 5 3.3 Surface def
18、ects . 6 3.4 Quality assurance . 6 4 Requirements, inspection and test methods 7 4.1 Test conditions and preparation of specimens for qualification 7 4.1.1 Tests fluids 7 4.1.2 Pipe junction 7 4.1.3 Assembling 7 4.1.4 Pressurizing 7 4.1.5 Ageing . 8 4.1.6 Pressurizing 8 5 Quality assurance . 9 5.1 P
19、roduct qualification 9 5.2 Quality control records . 10 5.3 Acceptance conditions . 10 5.4 Rejection . 11 5.5 Purchasers (users) quality control . 11 6 Preparation for delivery . 11 6.1 Cleaning. 11 6.2 Preservation and packaging 11 7 Storage . 12 (normative) Test assembly for ageing and pressure te
20、sting . 13 (normative) Inspection during assembly . 14 (normative) Ageing and pressurizing tests 15 BS EN 4816:2017EN 4816:2017 (E) 3 European foreword This document (EN 4816:2017) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enq
21、uiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a nation
22、al standard, either by publication of an identical text or by endorsement, at the latest by November 2017 and conflicting national standards shall be withdrawn at the latest by November 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of paten
23、t rights. CEN shall not be held responsible for identifying any or all such patent rights. 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, Cyprus, Cz
24、ech 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 the Unit
25、ed Kingdom. BS EN 4816:2017EN 4816:2017 (E) 4 1 Scope This standard specifies the required characteristics, inspection and test methods, quality assurance and procurement requirements for inch series, gasket seal with C seal in nickel alloy, for temperature ranges from type II to type V according to
26、 ISO 6771 and nominal pressure up to 10 500 kPa (class B according to ISO 6771). In addition to the requirements of this technical specification, the coupling assemblies shall be qualified in accordance with equipment or component specification requirements. 2 Normative references The following docu
27、ments, in whole or in part, are normatively referenced in this document and are indispensable for 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 2951, Aerospace series
28、 Metallic materials Test method Micrographic determination of content of non-metallic inclusions 1)EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts EN 10204, Metallic products Types of inspection documents ISO 468, Surface roughness Parameters
29、, their values and general rules for specifying requirements ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 6771, Aerospace Fluid systems and components Pressure and temperature classificat
30、ions ISO 8625-1, Aerospace Fluid systems Vocabulary Part 1: General terms and definitions related to pressure TR 2674, Aerospace series Design and construction of pipeline for fluids in liquid or gaseous condition Rigid lines, installation 2)TR 4815, Aerospace series Flange couplings up to 21 000 kP
31、a Design standard Inch series 2)MIL-PRF-23699, Lubricating oil, aircraft turbine engine, synthetic base, NATO code numbers: O-152, O-154, O-156, and O-157 3)3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 1)Published as ASD-STAN Prestandard at th
32、e date of publication of this standard. (http:/www.asd-stan.org/) 2)Published as ASD-STAN Technical Report at the date of publication of this standard. (http:/www.asd-stan.org/) 3)Published by: DoD National (US) Mil. Department of Defense. (http:/www.defenselink.mil/) BS EN 4816:2017EN 4816:2017 (E)
33、 5 3.1 Pressure Nominal pressure, proof pressure, impulse pressure, burst pressure according to ISO 8625-1. Maximum operating pressure depends on the seal use in the assembly. 3.2 Coupling and assembling 3.2.1 coupling assembly assembled ferrule, loose flange, bolts and pipe mating with e. g. equipm
34、ent (see Figure 1) Key 1 Bolts 2 Swivel flange 3 Tube 4 Coupling 5 Seal 6 Port connection on case or equipment Figure 1 Example of coupling assembly 3.2.2 dimensional code is composed with the nominal diameter given in 16 thof inches within two (2) digit and additional digit when necessary to descri
35、be the size of a fluid system component and other configuration options BS EN 4816:2017EN 4816:2017 (E) 6 3.3 Surface defects 3.3.1 surface irregularity nonconformity with general surface appearance, possible defect 3.3.2 crack clean (crystalline) fracture passing through or across the grain boundar
36、ies that possibly follows inclusions of foreign elements Note 1 to entry: Cracks are normally caused by overstressing the metal during forging or other forming operations, or during heat treatment. Note 2 to entry: Where parts are subject to significant reheating, cracks are usually discoloured by s
37、cale. 3.3.3 fold doubling over of metal, which can occur during the forging operation Note 1 to entry: Folds can occur at or near the intersection of diameter changes and are especially prevalent with non-circular necks, shoulders and heads. 3.3.4 lap fold-like machining defect 3.3.5 seam (1) usuall
38、y a surface opening or crack resulting from a defect obtained during casting or forging (2) extraneous material, stringer in the material, which is not homogeneous with base metal 3.3.6 pit void or hole in the surface as caused, for example, by corrosion 3.4 Quality assurance 3.4.1 production batch
39、definite quantity of some commodity or service produced at one time under conditions that are presumed uniform 3.4.2 delivery batch batch consisting of couplings with the same identity block which may come from different production batches 3.4.3 acceptable quality level AQL when a continuing series
40、of lots is considered, a quality level which for the purposes of sampling inspection is the limit of a satisfactory process average BS EN 4816:2017EN 4816:2017 (E) 7 3.4.4 qualification testing required to demonstrate successful performance of the coupling assembly in simulated service (overload, de
41、structive and fatigue tests) 3.4.5 major defect defect other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product for its intended purpose 3.4.6 minor defect defect that is not likely to reduce materially the usability of the considered
42、 product for its intended purpose, or that is a departure from established specification having little bearing on the effective use or operation of this product 4 Requirements, inspection and test methods See Table 1. The couplings shown on Figure 1 of this standard are for information only. The tes
43、t specimens shall be assembled with the part to test (e. g. elbow fitting instead of straight fitting) and its associated components in accordance with TR 4815. 4.1 Test conditions and preparation of specimens for qualification 4.1.1 Tests fluids Unless otherwise specified, tests shall be carried ou
44、t using e. g. oil compatible with the test temperature range. Water may be used, whenever practical, for pressure testing. 4.1.2 Pipe junction The method of joining the pipe to the coupling (brazing, welding, mechanical attachment, etc.) shall not be detrimental to the properties, strength or geomet
45、ry of the pipe assembly. The joint shall be in accordance with the design instructions and shall be inspected by direct measurement, X-ray or other non-destructive methods. 4.1.3 Assembling Installations of the coupling shall be in accordance with TR 2674 and TR 4815. The coupling shall be fitted wi
46、th nickel alloy double hexagonal head bolt with the relevant bolt size. Unless otherwise specified, the bolt shall be lubricated if necessary prior the assembling with engine oil (e. g. according to MIL-PRF-23699) on the thread and at the interface between the nut and the ferrule. Either bolt or mat
47、ing threaded part shall have coated on thread. A torque value comprised between the minimum and the maximum given in Table 2 plus locking torque value shall be apply to each bolt without any special sequence in the torque tightening. 4.1.4 Pressurizing Nominal pressure (PN); Proof pressure (PE) and
48、Burst pressure (PR) are given in Table 3 for current tube material and thickness able to with and minimum burst pressure required for such pipe assembly. BS EN 4816:2017EN 4816:2017 (E) 8 For other tube material and thickness the Burst pressure (PR) shall be determined with the formula: = m 2 = 4 =
49、2 where R mMaterial minimal strength resistance of the tube; e Thickness of the tube; D Nominal diameter of the tube. 4.1.5 Ageing Gasket shall be assembled on test specimen as given in Annex A or equivalent. 4.1.6 Pressurizing Nominal pressure (PN) is given in the design standard; Proof pressure (PE) is the double of Nominal pressure (PN) value. Burst pressure (PR) is four (4) times the Nominal pressure (PN) value. Tab
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