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1、BRITISH STANDARD BS ISO 6118:2006 Road vehicles Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70 C max.) ICS 43.040.40; 83.140.50 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00
2、 2006, Uncontrolled Copy, (c) BSI BS ISO 6118:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2006 BSI 2006 ISBN 0 580 48731 8 National foreword This British Standard reproduces verbatim ISO 6118:2006 and implements it as the U
3、K national standard. The UK participation in its preparation was entrusted to Technical Committee PRI/69, Components and fluids for vehicle braking systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-refer
4、ences The British Standards which implement international 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 O
5、nline. This publication does not purport to include 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 respon
6、sible international/European committee any enquiries on the interpretation, or proposals for change, and keep 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, t
7、he ISO title page, pages ii to iv, pages 1 to 16, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 1
8、4:25:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 6118 Second edition 2006-07-15 Reference number ISO 6118:2006(E) Road vehicles Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70
9、 C max.) Vhicules routiers Coupelles et joints en lastomre pour cylindres de systmes de freinage hydrauliques utilisant un liquide de frein base non ptrolire (temprature maximale dutilisation: 70 C) BS ISO 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Unco
10、ntrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page 1Scope 1 2Normative references 1 3Terms and definitions 1 4General requirements 2 4.1Workmanship and finish . 2 4.2Marking . 2 4.3Packaging . 2 4.4Sa
11、mpling 2 5Test requirements 2 5.1Resistance to fluid at elevated temperature . 2 5.2Precipitation . 2 5.3Wheel cylinder seals heat pressure stroking . 2 5.4Master cylinder seals heat pressure stroking 3 5.5Low temperature performance . 4 5.6Oven ageing . 4 5.7Corrosion . 5 5.8Storage corrosion test
12、5 6Test procedures . 5 6.1Resistance to fluid at elevated temperature Dimensional test . 5 6.2Precipitation test . 7 6.3Wheel cylinder seals heat pressure stroking . 8 6.4Master cylinder seals heat pressure stroking 10 6.5Low temperature performance . 12 6.6Oven ageing . 13 6.7Hardness determination
13、 . 13 6.8Corrosion test 13 6.9Storage corrosion test 15 Bibliography . 16 BS ISO 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of nati
14、onal standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Internat
15、ional organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the ru
16、les given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at
17、 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 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6118 was prepared by Technical Committee ISO/TC
18、22, Road vehicles, Subcommittee SC 2, Braking systems and equipment. This second edition cancels and replaces the first edition (ISO 6118:1980), which has been technically revised. BS ISO 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (c)
19、 BSI 1 Road vehicles Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70 C max.) 1Scope This International Standard specifies performance tests of brake cups and seals for hydraulic braking systems for road v
20、ehicles. It does not include requirements relating to chemical composition, tensile strength and elongation of the rubber compound. Disc brake seals are not covered by this International Standard. This International Standard is applicable to moulded seals (cups or double-lipped type gland seals), in
21、 diameter and smaller, compounded from rubber, for use in hydraulic actuating cylinders employing road vehicle non-petroleum base hydraulic brake fluid conforming to the requirements of ISO 4925. NOTEThe rubber used in these seals shall be suitable for operation in a temperature range of to . 2Norma
22、tive 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 edition of the referenced document (including any amendments) applies. ISO 48, Rubber, vulcanized or the
23、rmoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 188:1998, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 4925, Road vehicles Specification of non-petroleum-base brake fluids for hydraulic systems ISO 4926, Road vehicles Hydraulic
24、 braking systems Non-petroleum base reference fluids 3Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 sloughing release of carbon black on the surface of the rubber 3.2 scoring formation of grooves in the rubber, parallel to the direction of tr
25、avel of the piston or seal 3.3 scuffing visible erosion of the outer surface of the rubber 60 mm 40 C +70 C BS ISO 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 4General requirements 4.1Workmanship and finish Seals shall be fre
26、e from blisters, pin-holes, cracks, protuberances, embedded foreign material or other physical defects which can be detected by thorough inspection, and shall conform to the dimensions specified on the drawings. 4.2Marking The identification mark of the manufacturer and other details as specified on
27、 drawings shall be moulded into each seal. Each seal in conformity with this International Standard may also have the following mark: “ISO 6118”. 4.3Packaging Seals shall be packaged to meet requirements specified by the purchaser. 4.4Sampling The minimum lot on which complete specification tests sh
28、all be conducted for quality control testing, or the frequency of any specific type test used to control production, shall be agreed upon by the manufacturer and the purchaser. 5Test requirements 5.1Resistance to fluid at elevated temperature After being subjected to the test for resistance to compa
29、tibility fluid at elevated temperature as prescribed in 6.1, the seals shall conform to the requirements specified in Table 1, and shall show no excessive disintegration as evidenced by blisters or sloughing. 5.2Precipitation Not more than sediment by volume shall be formed in the centrifuge tube af
30、ter the seals have been tested as specified in 6.2. 5.3Wheel cylinder seals heat pressure stroking 5.3.1General Wheel cylinder seals when tested by the procedure specified in 6.3 shall meet the performance requirements specified in 5.3.2 to 5.3.6. Table 1 Requirements for fluid resistance at elevate
31、d temperature () CharacteristicsPermitted change VolumeFrom to Outside diameter, lip From to Outside diameter, base HardnessFrom to 70 C 0,0 %+16,0 % 0,0 %+5,75 % 10 IRHD0 IRHD 0,3 % BS ISO 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (
32、c) BSI 3 5.3.2Lip diameter change The minimum lip diameter of wheel cylinder seals after the stroking test shall be greater than the wheel cylinder bore by the minimum dimensions specified in Table 2. 5.3.3Leakage No constant dampness past the seals and no fluid discoloration of the filter paper on
33、two or more inspections shall occur. 5.3.4Corrosion Pistons and cylinder bore shall not show corrosion, as evidenced by pitting, to an extent discernible to the naked eye, but staining or discoloration shall be permitted. 5.3.5Change in hardness Rubber seals shall not decrease in hardness by more th
34、an when tested in accoprdance with the procedure specified in 6.7. 5.3.6Condition of test seals Wheel cylinder seals shall not show excessive deterioration such as scoring, scuffing, blistering, cracking, chipping (heel abrasion) or change in shape from original appearance. 5.4Master cylinder seals
35、heat pressure stroking 5.4.1General Master cylinder seals when tested by the procedure specified in 6.4 shall meet the performance requirements specified in 5.4.2 to 5.4.6. 5.4.2Lip diameter change The minimum lip diameter of master cylinder seals after the stroking test shall be greater than the ma
36、ster cylinder bore by the minimum dimensions specified in Table 3. Table 2 Lip diameter change of wheel cylinder seals Dimensions in millimetres Diameter of wheel cylinder boreMinimum excess over bore 0,40 0,50 0,65 0,75 ?19,05 19,05?25,4 25,4?38,1 38,1?60 10 IRHD BS ISO 6118:2006 Licensed Copy: she
37、ffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 5.4.3Leakage Same requirement as specified for wheel cylinder seals shall be applied (see 5.3.3). 5.4.4Corrosion Same requirement as specified for wheel cylinder seals shall be applied (see 5.3.4). 5.4.5Change
38、 in hardness Same requirement as specified for wheel cylinder seals shall be applied (see 5.3.5). 5.4.6Condition of the test seals Same requirement as specified for wheel cylinder seals shall be applied (see 5.3.6). 5.5Low temperature performance 5.5.1Leakage No leakage of fluid shall occur when sea
39、ls are tested according to the procedure specified in 6.5.1. 5.5.2Bend test The seal shall not crack and shall return to its approximately original shape within when tested in accordance with the procedure specified in 6.5.2. 5.6Oven ageing 5.6.1General Seals when tested according to the procedure s
40、pecified in 6.6 shall meet the requirements specified in 5.6.2 and 5.6.3. 5.6.2Change in hardness The change in hardness shall be within the limits of . 5.6.3Condition of the test seals The seal shall show no evidence of deterioration, or change in shape from original appearance. Table 3 Lip diamete
41、r change of master cylinder seals Dimensions in millimetres Diameter of wheel cylinder boreMinimum excess over bore 0,30 0,40 0,50 0,65 ?19,05 19,05?25,4 25,4?38,1 38,1?60 1 min 5 IRHD BS ISO 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy,
42、 (c) BSI 5 5.7Corrosion 5.7.1General Seals when tested in accordance with the procedure specified in 6.8 shall meet the requirements specified in 5.7.2 and 5.7.3. 5.7.2Corrosion of metal strips The seals shall not cause corrosion exceeding the limits shown in Table 4. The metal strips outside of the
43、 area where the strips are in contact shall be neither pitted nor roughened to the extent discernible to the naked eye, but staining or discoloration is permitted. 5.7.3Fluid-water mixture characteristics The fluid-water mixture at the end of the test shall show no gelling at . No crystalline-type d
44、eposits shall form and adhere to either the glass wall or the surface of metal strips. The fluid-water mixture shall contain no more than sediment by volume. 5.8Storage corrosion test After 12 cycles in the humidity cabinet when operated in accordance with the procedure specified 6.9, there shall be
45、 no evidence of corrosion adhering to or penetrating the wall of the cylinder bore that was in contact with the test seal. Slight discoloration (staining) or any corrosion or spots away from the contact surface of the test seals may be permissible. 6Test procedures 6.1Resistance to fluid at elevated
46、 temperature Dimensional test 6.1.1Apparatus and material The following apparatus and material shall be used for the test. 6.1.1.1Micrometer, shadowgraph or other suitable apparatus, to measure accurately to . 6.1.1.2Glass container, of capacity approximately and diameter , which can be tightly seal
47、ed. 6.1.1.3Chemical balance, capable of weighing to . Table 4 Permissible change in mass of corrosion test strips Test strips Permissible change in mass of surface Tinned iron Steel Aluminium Cast iron Brass Copper Zinc mg/cm2 0,2 0,2 0,1 0,2 0,4 0,4 0,4 23 C 5 C 0,2 % 0,02 mm 250 ml50 mm 1 mg BS IS
48、O 6118:2006 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 14:25:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 6.1.1.4Oven, uniformly heated dry air type, conforming to the requirements for method B of ISO 188:1998. 6.1.1.5Two glass-stoppered weighing bottles, of adequate mouth size to hol
49、d the seals under test. 6.1.1.6Isopropyl or ethyl alcohol, of (by volume) reagent grade for washing purpose. 6.1.2Test specimens Two seals shall be used for testing at . 6.1.3Test procedure Rinse the cups in the alcohol (6.1.1.6) and wipe dry with a clean, lint-free cloth to remove dirt and packing debris. Do not leave the seals in the alcohol for more than . Measure the lip and base diameters to the nearest , taking the average of two readings