1、 ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4835 Edition P1 2017-01 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.org ICS: Descriptors: ENGLISH V
2、ERSION Aerospace series Installation and removal requirements for Ring locked fitting and reducer, 24 Cone up to 35 000 kPa (5 080 psi) Inch Series Luft- und Raumfahrt Ein- und Ausbaubedingungen fr Anschlussverschraubung und Reduzierer mit Sicherungsring 24 Konus bis 35 000 kPa (5 080 psi) Zllige Se
3、rie Srie arospatiale Spcification de montage et dmontage des raccords implanter avec bague de scurit, interface conique 24 jusqu 35 000 kPa (5 080 psi) Srie inch This “Aerospace Series” Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Associati
4、on of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an ex
5、tent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, the ASD-STAN prEN will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardizat
6、ion) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. ASD-STAN Technical Committee approves
7、 that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”
8、ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled. ASD-STAN invites you to send your written comments or any suggestions that may arise. All rights reserved. No parts of this publication may be reproduce
9、d, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of ASD-STAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1st
10、January 2017 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical domain Copyright 2017 ASD-STAN prEN 4835:2017 (E) 2 Contents Page Foreword 3 Introduction 3 1 Scope . 4 2 Normative references . 4 3 Installation instructions 5 3.1 Engineering information . 5
11、 3.2 Port preparation . 6 3.3 Adaptor installation 9 4 Replacement instructions 13 4.1 General 13 4.2 Lockring removal 13 4.3 Adaptor Removal . 14 4.4 Adaptor reuse . 14 Bibliography . 15 prEN 4835:2017 (E) 3 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechan
12、ical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. Introduction This standard is co-owned standard and a functional equivalent of AS5551. There should be no tech
13、nical objection to use AS5551 as replacement of EN 4835 parts. Further revisions to this standard shall be coordinated with the SAE committee. European Standards use the International System of units (SI); however, large segments of the aerospace industry make use of other measurement systems as a m
14、atter of common working practice. All dimensions and units used in this Standard are given in SI units, with other units also indicated for the convenience of the user. The decimal sign used in International Standards is the comma (“,”); however, the comma is not used in common working practice with
15、 non-SI dimensions. Therefore, in common with many other aerospace standards, the decimal point (“.”) is used in this Standard when providing dimensions in inch-pound units. NOTE The use of non-SI units and the decimal point in this Standard does not constitute general acceptance of measurement syst
16、ems other than SI within European Standards. prEN 4835:2017 (E) 4 1 Scope This standard specifies the installation and removal requirements for adaptors and reducers, threaded, with lockring for pipe couplings 24 according to EN 4833 and EN 4836. This standard establishes an accurate procedure of ad
17、aptor installation, removal and reinstallation to ensure the repeatability of the installation operation and to ensure the effective compliance to sealing and locking requirements. The adaptor shown on all Figures of this standard is given as an example for the 24 internal cone interface according t
18、o EN 6123. This procedure is used for adaptors 24, for nominal pressure up to 35 000 kPa (5 080 psi). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cit
19、ed applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2435-001, Aerospace series Paints and varnishes Corrosion resistant chromated two component cold curing primer Part 001: Minimum requirements EN 4833, Aerospace series Pipe coupli
20、ng 24Cone up to 35 000 kPa (5 080 psi) Ring-locked fitting Flareless End Inch Series with Extra Fine Thread Pitch1)EN 4834, Aerospace series Adaptor, Pipe coupling 24 Cone up to 35 000 kPa (5 080 psi) Port for Ring locked fitting Inch Series Geometric configuration1)EN 4836, Aerospace series Pipe co
21、upling 24Cone up to 35 000 kPa (5 080 psi) Ring-locked fitting Reducer- Flared End Inch Series with Extra Fine Thread Pitch1)EN 6123, Aerospace series Fitting end, 24 internal cone, external thread, flareless type Extra fine thread pitch Inch series Design standard ISO 3161, Aerospace UNJ threads, w
22、ith controlled root radius, for aerospace Inch series ISO 16031-1. Aerospace fluid systems O-rings, inch series: Inside diameters and cross sections, tolerances and size-identification codes Part 1: Close tolerances for hydraulic systems AS8879, Screw Threads UNJ Profile, Inch Controlled Radius Root
23、 With Increased Minor Diameter2)1)Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org). 2)Published by SAE International (www.sae.org). prEN 4835:2017 (E) 5 3 Installation instructions 3.1 Engineering information Key 1 The F itting assemblies according to
24、EN 4833 and the Fitting reducer according to EN 4836 provide a semi-permanent male fitting for use in fluid systems of 35 000 kPa (5 080 psi) and compatible with titanium at -54 C to +135 C (-65 F to +230 F) temperature range. 2 The lockring is driven into the mating port serrations after the fittin
25、g assembly or fitting reducer assembly have been torqued. This prevents the fitting assembly from rotating in the port during coupling nut assembly and disassembly and also eliminates the necessity of lock wiring the fitting. Only one wrench is required to install or remove coupling nut. 3 Seal is m
26、etal to metal with O-ring size according to Table 1. O-ring material compound shall be selected and specified by the using design activity and shall be selected based upon suitability with fluid type and temperature range. 4 Tapped hole (boss port side) for the 24 adaptor installation. 5 Port side i
27、nterface of the adaptor according to “3.2 Port preparation”. 6 Thread A 7 Thread B Figure 1 prEN 4835:2017 (E) 6 Table 1 General information Ring locked fitting Dimensions in millimetres 24 coupling codeaAdaptor Part No. (as per EN 4833) Thread AbISO 3161 Class 3A Thread BbISO 3161 Class 3A O-ring S
28、ize code (as per ISO 16031-1) X max. 04 04 0.4375-28UNJEF 0.3125-24UNJF 010 3,15 06 06 0.5625-24UNJEF 0.4375-20UNJF 012 3,30 08 08 0.7500-20UNJEF 0.5625-18UNJF 014 10 10 0.8750-20UNJEF 0.6875-24UNJEF 016 12 12 1.0625-18UNJEF 0.8125-20UNJEF 018 3,56 16 16 1.3125-16UNJ 1.1250-18UNJEF 022 20 20 1.6250-
29、16UNJ 1.3125-18UNJEF 026 a Size code corresponds to the nominal tube diameter in 1/16 inch.b For information only, please refer to EN 6123.3.2 Port preparation 3.2.1 General The manufacturing sequence of port preparation is for information only. Qualification of the assembly is required for each man
30、ufacturing sequence and type of tool for a given port material installation method and nominal pressure. The hole shall confirm to EN 4834, using the applicable: tools for tap drilling; port machining; serration broaching; thread cutting. NOTE The design office can specify a hole without serration p
31、re-broaching, when low resistance material is used. 3.2.2 Tap drilling Drill 0.015 in to 0.030 in smaller than the specified minor diameter modified. The porting tool will size the minor diameter and provide balance of cavity configuration ready for broaching serration. Drill through or to a depth a
32、s required in Table 2. See Figure 3. prEN 4835:2017 (E) 7 Table 2 Port Drilling Dimensions in Inches Port Dash Number B C D E F G 04 0.68 0.495-0.498 0.339-0.341 0.088-0.098 0.153-0.158 0.296-0.301 06 0.85 0.675-0.678 0.464-0.466 0.103-0.113 0.168-0.173 0.311-0.316 08 1.04 0.784-0.787 0.582-0.584 0.
33、103-0.113 0.168-0.173 10 1.17 1.015-1.018 0.725-0.727 0.103-0.113 0.168-0.173 12 1.42 1.139-1.142 0.899-0.901 0.103-0.113 0.168-0.173 0.343-0.348 16 1.67 1.427-1.430 1.162-1.164 0.103-0.113 0.168-0.173 20 1.98 1.750-1.753 1.387-1.389 0.130-0.140 0.195-0.200 0.375-0.380 24 2.23 2.000-2.005 1.664-1.66
34、6 0.130-0.140 0.195-0.200 Dimensions in inches (millimetres) Key 1 Thread mod per AS8879 minor dia mod a C bore b Min full thread depth c recommended minimum boss length using Figure 2 3.2.3 Port machining The port machining shall be made in accordance with EN 4834. These fitting assemblies require
35、special tooling for proper installation. Tooling shall be certified to have been used during the qualification of fitting assemblies. prEN 4835:2017 (E) 8 3.2.4 Serration broaching Serration broaching shall be made according to EN 4834. Special broaching tool can be used. In this case the following
36、procedure shall apply: 1) Prior to broaching, the cutter teeth will rest on the surface of the boss and the body of the tool will be free to move up and down. Note that the nut should be backed away from the body of the tool. 2) The tool can be hand-held or used under a press. 3) Locate broaching to
37、ol pilot into the port. 4) Slowly apply a force to the mandrel while holding the body to allow the teeth to broach into the parent material counterbore. 5) Broaching is complete when the external shoulder of the mandrel contacts the internal shoulder in the body. 6) The installation force is then re
38、lieved and the tool is ready for removal. 7) To remove the tool from the boss, turn the nut in clockwise direction against the body and the mandrel will move up and show the cutting teeth from the counterbore. 3.2.5 Thread cutting Using the correct tool tap the port to at least the minimum full thre
39、ad depth H specified (see table 3 and figure 3). Remove all chips, burrs, cutting fluids etc., from the threads and the cut area. Table 3 Thread preparation Dimensions in Inches 24 coupling codeaThreadb ISO 3161 Class 3A H 0.005 04 0.3125-24UNJF 0.568 06 0.4375-20UNJF 0.631 08 0.5625-18UNJF 0.673 10
40、 0.6875-24UNJEF 0.693 12 0.8125-20UNJEF 0.763 16 1.1250-18UNJEF 0.806 20 1.3125-18UNJEF 0.838 24 0.3125-24UNJF 0.877 aSize code corresponds to the nominal tube diameter in 1/16 inch. bFor information only, please refer to EN 6123. prEN 4835:2017 (E) 9 Key 1 Thread Figure 3 3.3 Adaptor installation 3
41、.3.1 O-ring installation Visually inspect the plug in union and the port. They shall be free of scratches, dings, nicks, dents or rough spots, especially in the O-ring contact area and in the sealing cone area. O-ring shall slide over the thread of the port side of the adaptor by using the applicabl
42、e tools as shown in Figure 6, Table 4 and Table 5. O-ring damage is not accepted. The O-ring and the tool shall be lubricated with the system fluid, or a lubricant compatible with all other system components. Check that O-ring is not twisted and is properly seated in the groove of the adaptor before
43、 removing the tool. Table 4 O-Ring and Stand-off for Fitting Table 5 O-Ring and Stand-off for Reducer Dimensions in Inches Dimensions in Inches Port Dash Number Size-Code (as per EN 4836) O-Ring Size-Code (as per ISO 16031-1) P 0.017 5 R max 04 06-04 010 0.735 0 0.130 06 08-06 012 0.751 0 0.130 08 1
44、0-08 014 0.845 0 0.130 10 12-10 016 0.904 0 0.140 12 16-12 116 0.979 0 0.140 16 20-16 120 0.959 0 0.140 20 24-20 123 0.980 0 0.140 Port Dash Number Size-Code (as per EN 4833) O-Ring Size-Code (as per ISO 16031-1) P 0.017 5 R max 04 04 010 0.587 0 0.124 06 06 012 0.609 0 0.130 08 08 014 0.702 0 0.130
45、 10 10 016 0.765 0 0.130 12 12 116 0.838 0 0.140 16 16 120 0.838 0 0.140 20 20 123 0.838 0 0.140 prEN 4835:2017 (E) 10 Key 1 Lockring 2 Port 3 O-ring a“P” and ”R” dimensions are for design purposes only, and represent final stand-off dimensions. Do not use as Installation dimensions Figure 4 Key 1 F
46、itting Reducer Assembly 2 O-ring after assembly 3 O-ring before assembly 4 O-ring tool Figure 5 prEN 4835:2017 (E) 11 3.3.2 Adaptor installation into boss port 3.3.2.1 A combination wrench and drive tool according to manufacturer specification should be used to install the adaptor and the lockring i
47、nto the boss port. 3.3.2.2 The hole and the thread of the port side of the adaptor shall be lubricated with the system fluid, or a lubricant compatible with all other system components. Scratches, dents or rough spots are not allowed in O-ring contact area and the sealing cone area on the adaptor or
48、 in the port. 3.3.2.3 The thread of the port side of the adaptor shall be inserted into the boss by hand using a clockwise rotation until the adaptor is seated. To avoid possible O-ring damage, the adaptor should not be rotated in a counterclockwise direction. 3.3.2.4 Using the applicable tool engag
49、e the serration of the tool with those on the external serrations of the adaptor lockring as shown in Figure 6a. Place a torque wrench of the proper size over the hex of the wrench and apply a torque equal to the minimum value specified in Table 6. 3.3.2.5 When prebroaching is performed, note the relationship of the serrations of the lockring with respect to the prebroached serrations in the port. If they match, proceed to 3.3.2.7. If the serrations do not match the
