1、BRITISH STANDARD BS ISO 12151-2:2003 Connections for hydraulic fluid power and general use Hose fittings Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24 cone connector ends with O-rings ICS 23.040.70; 23.100.40 BS ISO 12151-2:2003 This British Standard was published under the authority of th
2、e Standards Policy and Strategy Committee on 16 July 2003 BSI 16 July 2003 ISBN 0 580 42258 5 National foreword This British Standard reproduces verbatim ISO 12151-2:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee MCE/1
3、8, Fluid power systems and components, to Subcommittee MCE/18/-/4, Connectors and associated components, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement inter
4、national publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to inclu
5、de all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquir
6、ies on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank pag
7、e, pages 1 to 13 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 12151-2:2003(E)INTERNATIONAL ADNATSDR ISO 115122- tide tsriFino -300210-60 Connections for
8、 hydraulic fluid power and general use Hose fittings Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24 cone connector ends with O-rings Raccordements pour transmissions hydrauliques et applications gnrales Flexibles de raccordement Partie 2: Flexibles avec embouts cne 24 et joints toriques con
9、formes lISO 8434-1 et lISO 8434-4 Referecne unbmer OSI -1512102:2)E(30INTERNATIONAL STANDARD ISO 12151-2 First edition 2003-06-01 Connectoisn foh rydrualic fluid power dna lareneg esu soH e tiftnisg :2 traP f esoHiittgns wiSI ht4348 Oa 1-dn 4348 OSI42 4- c enoconncerot sdne wiht ir-Osgn caRcroemedst
10、n opru rtsnasimsisno yhrduaqilseu te alppciitasno rngalse Flxelbise r edcacroemed tn raPti:2 e Flxeilbse vace mestuob cen 2 e 4t jniost rotiqseu crofnosem Il SO 8-4341 et Il SO 8-4344 BSISO121512:2003IS-15121 O2:(3002E) ii BSISO121512:2003IS-15121 O2:(3002E) iiiContents Page Foreword iv Introduction
11、 v 1 Scope 1 2 Normative references. 1 3 Terms and definitions. 2 4 Performance requirements 2 5 Designation of hose fittings. 3 6 Design 3 7 Manufacture. 3 8 Assembly instructions 4 9 Procurement information. 5 10 Marking. 5 11 Identification statement (Reference to this part of ISO 12151) . 5 Bibl
12、iography . 13 BSISO121512:2003IS-15121 O2:(3002E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. E
13、ach member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Internati
14、onal Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standa
15、rds adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject
16、 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12151-2 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components. ISO 12151 consists of the following parts, under the
17、 general title Connections for hydraulic fluid power and general use Hose fittings: Part 1: Hose fittings with ISO 8434-3 O-ring face seal ends Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24 cone connector ends with O-rings Part 3: Hose fittings with ISO 6162 flange ends Part 4: Hose fittin
18、gs with ISO 6149 metric stud ends Part 5: Hose fittings with ISO 8434-2 37 flared ends Part 6: Hose fittings with ISO 8434-6 60 cone ends BSISO121512:2003IS-15121 O2:(3002E) vIntroduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an
19、enclosed circuit. In general applications, a fluid may be conveyed under pressure. Components are connected through their ports by stud ends on fluid conductor fittings to tubes/pipes or to hose fittings and hoses. BSISO121512:2003blank 3002:215121OSISBINTENRATIONAL TSANDADR IS-15121 O2:(3002E)1Conn
20、ections for hydraulic fluid power and general use Hose fittings Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24 cone connector ends with O-rings 1 Scope This part of ISO 12151 specifies the general and dimensional requirements for the design and performance of hose fittings with 24 cone conn
21、ector ends with O-rings, in accordance with ISO 8434-1 and ISO 8434-4. These hose fittings are made of carbon steel and are intended for use with hoses with nominal inside diameters from 5 mm through 38 mm (inclusive). NOTE 1 Materials other than carbon steel may be supplied as agreed between the ma
22、nufacturer and user. NOTE 2 For hose fittings used in hydraulic and pneumatic braking systems on road vehicles (as defined in the scope of ISO/TC 22), see ISO 4038, ISO 4039-1 and ISO 4039-2. These hose fittings (see Figure 1 for a typical example) are for use in fluid power systems with hoses that
23、meet the requirements of respective standards and in general applications with suitable hoses. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest ed
24、ition of the referenced document (including any amendments) applies. ISO 4397, Fluid power systems and components Connectors and associated components Nominal outside diameters of tubes and nominal inside diameters of hoses ISO 4759-1:2000, Tolerances for fasteners Part 1: Bolts, screws, studs and n
25、uts Product grades A, B and C ISO 5598, Fluid power systems and components Vocabulary ISO 8434-1 1) , Metallic tube connections for fluid power and general use Part 1: 24 compression fittings ISO 8434-4 1) , Metallic tube connections for fluid power and general use Part 4: 24 cone connectors with O-
26、ring weld-on nipples ISO 8434-5 2) , Metallic tube connections for fluid power and general use Part 5: Test methods for threaded hydraulic fluid power connections ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests 1) The content of ISO 8434-4 will be incorporated into the revision
27、of ISO 8434-1. 2) ISO 8434-5 is under revision and will be replaced by ISO 19879. BSISO121512:2003IS-15121 O2:(3002E) 2 Key 1 hose fitting 2 O-ring seal 3 port 4 adapter 5 nut Figure 1 Example of typical ISO 12151-2 hose fitting connection 3 Terms and definitions For the purposes of this document, t
28、he terms and definitions given in ISO 5598 apply. 4 Performance requirements 4.1 Hose assemblies shall meet the performance requirements specified in the appropriate hose specification without leakage or failure. 4.2 The working pressure of the hose assembly shall be the lower of the pressures given
29、 for its size in ISO 8434-1 or ISO 8434-4 and in the relevant hose specification. 4.3 Hose fitting tests shall be conducted in accordance with ISO 8434-5 for the working pressure of the hose assembly. The hose assembly shall undergo a cyclic endurance test and meet or exceed the number of cycles spe
30、cified in the relevant hose specification. BSISO121512:2003IS-15121 O2:(3002E) 35 Designation of hose fittings 5.1 Hose fittings shall be designated by an alphanumeric code to facilitate ordering. They shall be designated by ISO 12151-2, followed by a spaced hyphen, then the connection end type, sha
31、pe and style letter symbols (see 5.4), followed by another spaced hyphen and, for the ends, the letter symbol for the series directly followed by the 24 ocone end size (nominal connection size) and the hose size (nominal hose inside diameter), each separated by a multiplication sign (). EXAMPLE A sw
32、ivel straight light-duty series hose fitting for use with 22 mm OD tubing and 19 mm ID hose is designated as follows: ISO 12151-2 - SWS - L22 19 5.2 The letter symbol designation of the hose fitting shall consist of the connection end type, immediately followed by the shape of the fitting and the nu
33、t style, where applicable. 5.3 Tube ends are assumed to be male and thus do not need to be included in the code. However, if another end is involved, it shall be designated. 5.4 The following letter symbols shall be used: Connection end type Shape Swivel / SW Straight / S 90 oelbow / E 45 oelbow / E
34、45 Series Symbol Light-duty L Heavy-duty S 6 Design 6.1 Hose fitting dimensions shown in Figures 2 to 5 shall conform to the dimensions in Tables 1 to 4 and to the relevant dimensions in ISO 8434-1 and ISO 8434-4. 6.2 Hex tolerances across flats shall be in accordance with ISO 4759-1:2000, product g
35、rade C. Minimum across corner hex dimensions are 1,092 times the nominal width across flats. The minimum side flat is 0,43 times the nominal width across flats. 6.3 Angular tolerances on axes of ends of elbows shall be 3 for all sizes. 6.4 Details of contour shall be as chosen by the manufacturer, p
36、rovided that the dimensions given in Tables 1 to 4 are maintained. 7 Manufacture 7.1 Construction Hose fittings may be made by forging or cold forming, machined from bar stock or manufactured from multiple components. BSISO121512:2003IS-15121 O2:(3002E) 4 7.2 Workmanship Workmanship shall conform to
37、 the best commercial practice to produce high quality hose fittings. Hose fittings shall be free from visual contaminants, all hanging burrs, loose scale and slivers which might be dislodged in use, and any other defects that might affect the function of the parts. All machined surfaces shall have a
38、 surface roughness value of Ra u 6,3 m, except where otherwise specified. 7.3 Finish The external surface and threads of all carbon steel parts shall be plated or coated with a suitable material that passes a 72-h neutral salt spray test in accordance with ISO 9227, unless otherwise agreed upon by t
39、he manufacturer and the user. Any appearance of red rust during the salt spray test on any area, except those noted below, shall be considered failure: all internal fluid passages; edges, such as hex points, serrations and crests of threads, where there may be mechanical deformation of the plating o
40、r coating typical of mass-produced parts or shipping effects; areas where there is mechanical deformation of the plating or coating caused by crimping, flaring, bending and other post-plate metal forming operations; areas where the parts are suspended or affixed in the test chamber where condensate
41、can accumulate. Internal fluid passages shall be protected from corrosion during storage. NOTE Cadmium plating is not preferred due to environmental concerns. Changes in plating can affect assembly torques and require requalification, when applicable. 7.4 Fitting protection By a method agreed betwee
42、n the supplier and purchaser, the face of the hose fittings and threads (both internal and external) shall be protected by the manufacturer from nicks and scratches that would be detrimental to the function of the hose fitting. Passages shall be securely covered to prevent the entrance of dirt or ot
43、her contaminants. Paper caps and plugs shall not be used. 8 Assembly instructions The assembly of the hose fittings to other connectors or tubes shall be carried out without external loads. The manufacturer shall draw up assembly instructions for the use of hose fittings. These instructions shall in
44、clude at least the following: instructions regarding the assembly of the hose fittings, such as the number of wrenching turns or assembly torque; recommendations regarding the tools to be used for assembly. When hose fittings are used with tubes, follow the instructions related to material, preparat
45、ion and attachment given in ISO 8434-1 or ISO 8434-4, as appropriate. BSISO121512:2003IS-15121 O2:(3002E) 59 Procurement information The following minimum information should be supplied by the purchaser when making an inquiry or placing an order: description of hose fitting (using designation in acc
46、ordance with Clause 5); material of hose fitting (if other than carbon steel); hose type and size; fluid to be conveyed; working pressure; working temperature (ambient and of the fluid). 10 Marking Hose fittings shall be permanently marked with the manufacturers name or trademark. The nuts on female
47、 hose fittings shall be marked with the series (L or S) and hose fitting size. 11 Identification statement (Reference to this part of ISO 12151) Use the following statement in test reports, catalogues and sales literature when electing to comply with this part of ISO 12151: “Hose fitting with 24 com
48、pression fitting end and 24 cone connector end with O-ring in conformance to ISO 12151-2:2003, Connections for hydraulic fluid power and general use Hose fittings Part 2: Hose fittings with ISO 8434-1 and ISO 8434-4 24 cone connector ends with O-rings.” NOTE 1 A free length of tube should be left so
49、 that, in the case of an O-ring change, the nut can be moved behind the O-ring groove. NOTE 2 Method of attachment of hose fitting to hose is optional. NOTE 3 Connection details in accordance with ISO 8434-1 and ISO 8434-4. aThread. bWidth across flats. Figure 2 Female straight swivel hose fitting (SWS) BSISO121512:2003IS-15121 O2:(3002E) 6 Table
