1、BSI Standards PublicationBS EN 16602-70-46:2014Space product assurance Requirements formanufacturing andprocurement of threadedfastenersBS EN 16602-70-46:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation ofEN 16602-70-46:2014.The UK participation in its preparation
2、 was entrusted to Technical Committee ACE/68, Space systems and operations.A list of organizations represented on this committee can be obtained 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
3、application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 86587 9 ICS 49.030.01; 49.140 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and
4、 Strategy Committee on 30 November 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16602-70-46 October 2014 ICS 49.030.01; 49.140 English version Space product assurance - Requirements for manufacturing and procureme
5、nt of threaded fasteners Assurance produit des projets spatiaux - Exigences pour la fabrication et lapprovisionnement de fixations filetes Raumfahrtproduktsicherung - Anforderungen fr die Herstellung und Beschaffung von eingezogenen Klemmen/Befestigern This European Standard was approved by CEN on 1
6、8 October 2014. CEN and CENELEC 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 national st
7、andards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN and CENELEC 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 and CENELEC member i
8、nto its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Fi
9、nland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Ave
10、nue Marnix 17, B-1000 Brussels 2014 CEN/CENELEC All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 16602-70-46:2014 EBS EN 16602-70-46:2014Table of contents Foreword 4 1 Scope . 5 2 Normative references . 6 3 Terms
11、, definitions and abbreviated terms 8 3.1 Terms defined in other standards . 8 3.2 Terms specific to the present standard . 8 3.3 Abbreviated terms. 9 4 Requirements 10 4.1 Fabrication 10 4.1.1 General . 10 4.1.2 Raw material . 10 4.1.3 Head forming 10 4.1.4 Heat treatment 11 4.1.5 Head-to-shank fil
12、let rolling . 11 4.1.6 Threads . 11 4.1.7 Identification marking 12 4.1.8 Surface treatment . 12 4.1.9 Workmanship, handling and packaging . 12 4.2 Dimensional and metallurgical requirements. 13 4.2.1 General . 13 4.2.2 Nominal dimensions 13 4.2.3 Head-to-shank fillet . 13 4.2.4 Non-destructive insp
13、ections 14 4.2.5 Metallurgical examination 15 4.2.6 Measurement of hydrogen content 16 4.2.7 Outgassing and offgassing 16 4.3 Mechanical testing 17 4.3.1 General . 17 4.3.2 Hardness test 17 EN 16602-70-46:2014 (E)BS EN 16602-70-46:20144.3.3 Tensile test . 18 4.3.4 Shear test . 19 4.3.5 Fatigue test
14、. 20 4.3.6 Creep test . 20 4.3.7 Corrosion test 22 4.3.8 Stress-corrosion test . 22 4.4 Quality assurance . 23 4.4.1 General . 23 4.4.2 Quality requirements . 23 Annex A (normative) Customer specification document for threaded fasteners DRD . 26 Annex B (normative) Product conformance report (PCR) D
15、RD . 28 Annex C (informative) Inspection levels, acceptance quality limits (AQL) and limiting quality levels (LQ) for inspection of fasteners . 30 Bibliography . 32 Figures Figure 4-1: Tolerance of head-to-shank fillet profile 14 Figure 4-2: Location of microsections for metallurgical examination .
16、15 Figure 4-3: Area delimiting interruptions in grain flow in the head-to-shank region . 16 Figure 4-4: Example of a regular grain flow in a threaded surface 16 Figure 4-5: Locations for hardness testing (indicated with cross symbol) . 18 Figure 4-6: Loading schematic for tensile testing of threaded
17、 fasteners . 21 Figure 4-7: Schematic of an example of double-shear loading jigs . 22 Tables Table 4-1: Maximum allowed values of the extension C of the distorted area shown in Figure 4-1 . 14 Table C- 1: Inspection levels, acceptance quality limits (AQL) and limiting quality levels (LQ) for inspect
18、ion of fasteners 30 EN 16602-70-46:2014 (E)BS EN 16602-70-46:2014Foreword This document (EN 16602-70-46:2014) has been prepared by Technical Committee CEN/CLC/TC 5 “Space”, the secretariat of which is held by DIN. This standard (EN 16602-70-46:2014) originates from ECSS-Q-ST-70-46C Rev.1. This Europ
19、ean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015, and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements
20、 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 has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document has be
21、en developed to cover specifically space systems and has therefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound
22、to implement this European Standard: 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, Portugal,
23、Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 16602-70-46:2014 (E)BS EN 16602-70-46:20141 Scope This Standard defines the requirements for manufacturing, provision, inspection and quality control of high-quality threaded fastening devices (bolts, nuts, st
24、uds and screws) hereafter referred to as threaded fasteners or fasteners, used in space hardware. This Standard does not include a complete review of the factors relevant to the fabrication of high quality threaded fasteners. It provides the definition of the technical requirements and quality contr
25、ol procedures to be applied in the fabrication and supply of threaded fasteners for spacecraft applications. Fasteners for spacecraft applications are those aerospace standard fasteners (i.e. in accordance with LN, DIN or other national or international aerospace standards), or those fasteners meeti
26、ng or exceeding the requirements in ISO 4759-1 for “Product grade A”, which also fulfil the requirements for space applications as specified in the present document. EN 16602-70-46:2014 (E)BS EN 16602-70-46:20142 Normative references The following dated normative documents are called by the requirem
27、ents of this ECSS Standard and therefore constitute requirements to it. Subsequent amendments to, or revisions of any of these publications do not apply. NOTE However, parties to agreements based on this ECSS Standard are encouraged to investigate the possibility of applying the most recent editions
28、 of the normative documents indicated below. EN reference Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01C ECSS system Glossary of terms EN 16603-30-01 ECSS-E-ST-30-01C Space engineering Fracture control EN 16602-70 ECSS-Q-ST-70C Space product assurance Materials, parts and processes EN 16602
29、-70-02 ECSS-Q-ST-70-02C Space product assurance Thermal vacuum outgassing test for the screening of space materials EN 16602-70-29 ECSS-Q-ST-70-29C Space product assurance The determination of offgassing products from materials and assembled articles to be used in a manned space vehicle crew compart
30、ment EN 16602-70-36 ECSS-Q-ST-70-36C Space product assurance Material selection for controlling stress-corrosion cracking EN 16602-70-37 ECSS-Q-ST-70-37C Space product assurance Determination of the susceptibility of metals to stress corrosion cracking EN 16602-70-71 ECSS-Q-ST-70-71C Space product a
31、ssurance Data for selection of space materials ISO 204 Metallic materials Uninterrupted uniaxial creep testing in tension Method of test ISO 225 Fasteners Bolts, screws, studs and nuts Symbols and designations of dimensions ISO 1502 ISO general purpose metric screw threads Gauges and gauging EN 1660
32、2-70-46:2014 (E)BS EN 16602-70-46:2014EN reference Reference in text Title 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 2859-2 Sampling procedures for inspection by attributes, Part 2: Sa
33、mpling plans indexed by limiting quality (LQ), for isolated lots inspection ISO 3353-1:2002 Aerospace Lead and runout threads Part 1: Rolled external threads ISO 3800 Threaded fasteners Axial load fatigue testing Test methods and evaluation of results ISO 4759-1 Tolerances for fasteners Part 1: Bolt
34、s, screws, studs and nuts Product grades A, B and C ISO 6157-2 Fasteners Surface discontinuities Part 2: Nuts ISO 6157-3 Fasteners Surface discontinuities Part 3: Bolts, screws and studs for special requirements ISO 6506-1 Metallic materials Brinell hardness test Part 1: Test method ISO 6506-2 Metal
35、lic materials Brinell hardness test Part 2: Verification and calibration of testing machines ISO 6506-3 Metallic materials Brinell hardness test Part 3: Calibration of reference blocks ISO 6507-1 Metallic materials Vickers hardness test Part 1: Test method ISO 6507-2 Metallic materials Vickers hardn
36、ess test Part 2: Verification and calibration of testing machines ISO 6507-3 Metallic materials Vickers hardness test Part 3: Calibration of reference blocks ISO 6508-1 Metallic materials Rockwell hardness test Part 1: Test method ISO 6508-2 Metallic materials Rockwell hardness test Part 2: Verifica
37、tion and calibration of testing machines ISO 6508-3 Metallic materials Rockwell hardness test Part 3: Calibration of reference blocks ISO 9140 Aerospace Nuts, plain or slotted (castellated) Test methods DIN ISO 9152 Aerospace Bolts, with MJ Threads, in Titanium alloys, strength class 1100 MPa Procur
38、ement specification ASTM B 117-07a Standard practice for operating salt spray (fog) apparatus ASTM E 1417-05e1 Standard practice for liquid penetrant testing ASTM E 1444-05 Standard practice for magnetic particle testing EN 16602-70-46:2014 (E)BS EN 16602-70-46:20143 Terms, definitions and abbreviat
39、ed terms 3.1 Terms defined in other standards For the purpose of this Standard, the terms and definitions from ECSS-S-ST-00-01 and ECSS-Q-ST-70 apply. 3.2 Terms specific to the present standard 3.2.1 bolt cylindrical screwed bar provided with a head, generally not threaded along its entire length NO
40、TE For example: Shank plus threaded portion. 3.2.2 fail-safe approach in which the structure is designed with sufficient structural redundancy to ensure that the failure of one structural element does not cause general failure of the entire structure 3.2.3 fastener device used to hold parts firmly t
41、ogether in an assembly 3.2.4 galling condition whereby excessive friction between high spots results in localized welding with subsequent splitting and a further roughening of rubbing surfaces of one or both or two mating parts 3.2.5 nut metal collar, screwed internally, to fit a bolt NOTE Usually h
42、exagonal in shape and operated by a spanner. EN 16602-70-46:2014 (E)BS EN 16602-70-46:20143.2.6 safe-life approach which requires that the largest undetected defect that can exist in the structure does not grow to failure when subjected to loads and environments encountered in service 3.2.7 sampling
43、 plan combination of sample size to be used with associated batch acceptability criteria 3.2.8 shank unthreaded portion of the cylindrical screwed bar of a bolt 3.2.9 stud shank, or endless bolt, externally screwed from one end, both ends or along its entire length 3.2.10 (screw) thread helical ridg
44、e of approximately triangular, square or rounded section, formed on a cylindrical core, the pitch and core diameter being standardised under various systems 3.2.11 threaded fastener device composed by a cylindrical screwed bar provided with a head and a metal collar, screwed internally, to fit the c
45、ylindrical bar that is used to hold parts firmly together in an assembly 3.3 Abbreviated terms For the purpose of this Standard, the abbreviated terms from ECSS-S-ST-00-01C and the following apply: Abbreviation Meaning AQL acceptance quality level ASTM American Society for Testing and Materials HB B
46、rinell hardness HRC Rockwell hardness HV Vickers hardness ISO International Organization for Standardization LQ limiting quality PCR product conformance report PVC polyvinyl chloride RMC raw material certificate UTS ultimate tensile strength EN 16602-70-46:2014 (E)BS EN 16602-70-46:20144 Requirement
47、s 4.1 Fabrication 4.1.1 General a. The customer shall establish a specification document in conformance with the DRD in Annex A. b. The manufacturer shall have a quality assurance system. c. The manufacturer shall verify and assure conformance during production to the technical requirements specifie
48、d in this clause. 4.1.2 Raw material a. The raw material for threaded fasteners shall be selected in accordance with the metallic materials requirements as per ECSS-Q-ST-70-71C, if not otherwise specified in the customer specification document for threaded fasteners. b. Nut material shall be more du
49、ctile than bolt material. NOTE The reason is that during tightening nut threads can deflect to seat on the bolt threads. c. Materials for threaded fasteners shall be selected in order to avoid galling of the mating surfaces. NOTE Galling in stainless steel fasteners can be prevented by using two different steels on the mating surfaces and by specific surface treatments. d. Materials for threaded fasteners shall be corrosion resistant e. Materials shall possess high resistance to stress-c
