ISO-6805-1994.pdf

INTERNATIONAL STANDARD IS0 6805 Second edition 1994-l o-01 Rubber hoses and hose assemblies for underground mining - Wire-reinforced hydraulic types for coal mining - Specification Tuyaux et flexibles en caoutchouc pour /es mines souterraines - Types hydrauliques avec armure de fils m6talliques pour mines de charbon - Spkifications Reference number IS0 6805:1994(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6805:1994(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 least 75 % of the member bodies casting a vote. International Standard IS0 6805 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). This second edition cancels and replaces the first edition (IS0 6805:1984), which has been technically revised. cl IS0 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanrcal, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 ? CH-1211 Geneve 20 . Switzerland Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 6805:1994( E) Rubber hoses and hose assemblies for underground mining - Wire-reinforced hydraulic types for coal mining - Specification 1 Scope This International Standard specifies requirements for six types of embedded-wire hose and hose assembly of bore diameter from 5 mm to 51 mm for use with common hydraulic fluids such as mineral oils, soluble oils, oil and water emulsions, aqueous glycol solution and water at temperatures ranging from - 40 “C to + 100 “C for types 1 to 5 and from - 40 “C to + 121 “C for type 6. Operation at the extremes of or outside this temperature range may materially reduce the life of the hose. The hose is not suitable for use with fluids having a castor oil or ester base. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions ,indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 1402:-I, Rubber and plastics hoses and hose assemblies - Hydrostatic testing. IS0 1436: 1991, Rubber hoses and hose assemblies - Wire-reinforced hydraulic type - Specification. IS0 1817: 1985, Rubber, vulcanized - Determination of the effect of liquids. IS0 3862: 1991, Rubber hoses and hose assemblies - Rubber-covered, spiral wire reinforced, hydraulic type - Specification. IS0 4671 :I 984, Rubber and plastics hose assemblies - Methods of measurement sions. and hose of dimen- IS0 4672:1988, Rubber and plastics hoses - Sub- ambient temperature flexibility tests. IS0 6803:1994, Rubber or plastics hoses and hose assemblies - Hydraulic-pressure impulse test with- out flexing. IS0 6945:1991, Rubber hoses - Determination of abrasion resistance of the outer cover. IS0 7326:1991, Rubber and plastics hoses - As- sessment of ozone resistance under static conditions. IS0 8030: 1987, Rubber and plastics hoses for under- ground mining - Method of test for flammability. IS0 8031 :I 993, Rubber and plastics hoses and hose assemblies - Determination of electrical resistance. IS0 8033: 1991, Rubber and plastics hose - Deter- mination of adhesion between components. 1) To be published. (Revision of IS0 1402:1984) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6805:1994(E) fJ IS0 3 Types of hose 4 Materials and construction Six types of hose are specified: Type 1: a hose with two steel-wire braids, dimen- sionally and constructionally in line with IS0 1436:1991, type 2A. Type 2: a hose with two steel-wire braids, which is typical of that at present in use in many deep coal- mining installations. The dimensional parameters have been selected to provide increased reliability. Type 3: a hose with four steel-wire spiral plies, di- mensionally and constructionally in line with IS0 3862:1991, type 2. Type 4: a hose with two steel-wire braids, dimen- sionally in line with type 2 but constructed to give higher maximum working pressure ratings. Type 5: a hose with four steel-wire spiral plies, di- mensionally and constructionally in line with IS0 3862:1991, type 5. Type 6: a hose with four or six steel-wire spiral plies, designed for higher working pressures and temper- atures than type 5. NOTE 1 This International Standard does not include re- quirements for end fittings. It is limited to the performance of hoses and hose assemblies. 4.1 The hose shall be anti-static and fire-resistant. The hose shall consist of an oil- and water-resistant synthetic-rubber lining, a steel-wire reinforcement and an oil-, water-, weather- and abrasion-resistant synthetic-rubber cover. A ply or braid of suitable tex- tile material may be used over the lining and/or the wire reinforcement to anchor the synthetic rubber to the wire. Each braid or spiral wire layer shall be sep- arated by an insulating layer of rubber. 4.2 The hose shall be concentric in accordance with the requirements of table 1, when measured in ac- cordance with IS0 4671. 5 Dimensions The bore diameter, diameter over reinforcement and outside diameter of finished hose shall meet the re- quirements of tables 2 to 7 when measured in ac- cordance with IS0 4671. Table 1 - Hose concentricity Values in mdlimetre Nominal bore Up to and including 6,3 Maximum variation from concentricity Bore diameter to overall Bore diameter to diameter reinforcement diameter 0,5 0,5 Over 6,3 and up to and including 25 Over 25 0,7 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6805:1994(E) Table 2 - Hose dimensions: type 1 Dimensions in millimetres T 1 Bore diameter Diameter over outer wire braid Outside diameter of finished hose Nominal bore min. max. min. max. min. max. 5 4,5 5,4 IO,6 II,7 15,l 16,7 6.3 61 7,o 12,l 13,3 16.7 18,3 IO 93 IO,1 16,l 17.3 20,6 22,2 12,5 12,3 13,5 19,0 20,6 23,8 25,4 16 15,4 16,7 22,2 23,8 27,0 28,6 19 18,6 19,8 26,2 27,8 31.0 32,6 25 25,0 26,4 34,l 35,7 38,5 40,9 31,5 31,3 33.0 43,3 45.7 49.2 52,4 38 37.7 39,3 49,6 52,0 55,6 58.8 51 50,4 52,0 62,3 64.7 68,2 71,4 Table 3 - Hose dimensions: type 2 Dimensions in millimetres Diameter over outer wire braid Outside diameter of finished hose Nominal bore 6.3 IO 12.5 16 19 25 31.5 Bore diameter min. max. 6,l 6,6 9,3 9,8 12,4 13,0 15,6 16,l 18,8 19,3 25,0 25,8 31.4 32,l min. I max. I min. I max. 12,3 13.1 16,4 17,7 16,2 17,2 20,8 22,l 20.6 21,6 25,8 27,l 24,0 25.0 29.2 30.5 27.8 28,8 33,0 34,3 34,7 36,0 39,9 41.4 40,8 42,0 46,7 48,3 Table 4 - Hose dimensions: type 3 Dimensions in millimetres Nominal bore Bore diameter Diameter over outer wire ply min. max. min. max. Outside diameter of finished hose min. max. 63 62 7,O 14,l 15,3 17.1 18,7 IO 9.3 IO,1 16,9 18,l 20,6 22,2 12,5 12,3 13,5 19,4 21 ,o 23,8 25,4 16 15,5 16,7 23,0 24,6 27,4 29,0 19 18,6 19.8 27,4 29,0 33,o 33,4 25 25.0 26,4 34,5 36,l 38,5 40,9 31,5 31,4 33,0 45.0 47,0 49,2 52,4 38 37,7 39,3 51.4 53,4 55,6 58.8 51 50,4 52,0 64.3 67,3 68.2 71,4 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6805:1994(E) 0 IS0 Table 5 - Hose dimensions: type 4 Dimensions in millimetres Nominal bore 12.5 19 25 31.5 38 51 Bore diameter Diameter over outer wire braid min. max. min. max. 12.4 13.0 20.6 21.6 18.8 19,3 27.8 28,8 25.0 25,8 34,7 36,0 31.4 32.1 40.8 42.0 37.8 39.0 47,4 48.7 50,5 51,7 60.1 61.3 Outside diameter of finished hose min. 25.8 27,l 33.0 34,3 39.9 41.4 46,7 48.3 53,3 54,9 66.0 67.6 max Table 6 - Hose dimensions: type 5 Dimensions in millimetres Nominal bore Bore diameter Diameter over outer wire ply min. max. min. max. Outside diameter of finished hose min. max. 12,5 19 25 31.5 38 51 12.3 13.5 21,8 23.4 24,E 26,2 18.6 19.8 27,6 29,2 31.4 33.0 25.0 26.4 34,4 36.0 37.5 39.9 31.4 33.0 40.9 42.9 43.9 47,l 37,7 39.3 47.8 49.8 51,9 55,l 50.4 52,0 62.2 64.2 66.5 69.7 Table 7 - Hose dimensions: type 6 Dimensions in millimetres Nominal bore Bore diameter Diameter over outer wire ply Outside diameter of finished hose 19 25 31.5 38 51 min. max. min. max. min. max. 18,6 19,8 28.2 29,8 31,0 33,2 25.0 26.4 34.9 36.4 37,6 39,8 31.4 33,0 45,6 48.0 48,3 51.3 37.7 39,3 53.1 55.5 55.8 58.8 50.4 52,0 66,9 69,3 69.5 72,7 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- f3 IS0 IS0 6805:1994(E) 6 Pressure requirements 6.1 The maximum working pressure of the hose shall comply with the requirements of table8. 6.2 The hoses shall withstand without damage or failure a proof test pressure of twice the maximum working pressure given in table8 and maintained by the method described in IS0 1402. 6.3 The hoses shall be capable of achieving a mini- mum burst pressure of four times the maximum working pressure given in table8, when tested in ac- cordance with the burst pressure test described in IS0 1402. 7 Minimum bend radius and change in length at maximum working pressure 7.1 The hose shall be capable of performing at maximum working pressure when curved to a radius not smaller than that given in tableg. NOTE 2 Should any portion of the hose be curved to a radius smaller than the specified bend radius, the perform- ance capability of the hose is reduced. 7.2 The change in length at the maximum working pressure shall not be greater than i % for all types, ( when measured in accordance with the change-in-length test described in IS0 1402. Table 8 - Maximum working pressure Maximum working pressure Nominal bore Type 1 Type2 Type3 mm 1 MPa 1 bar 1 MPa 1 bar 1 MPa I bar 5 41,5 415 6.3 40.5 405 10 33.0 330 12,5 27.5 275 16 25,0 250 19 21,5 215 25 16.5 165 31.5 12.5 125 38 9.0 90 51 800 80 - - 38.0 380 32,7 327 27.5 275 21.5 215 18.7 187 16.7 167 13,2 132 - - - - - - 45,0 450 44.5 445 41,5 415 35.0 350 35,0 350 28,0 280 21.0 210 18,5 185 16.5 165 - I - - - - - 36,2 362 55,0 550 - - - - 27,6 276 42.0 420 21.5 215 38,0 380 17.2 172 3205 325 14,6 146 29,0 290 1 I,2 112 25.0 250 Type5 -TGJX- - 1 - Type 6 Table 9 - Minimum bend radius Dimensions in millimetres Minimum bend radius Nominal bore Type 1 Types 2 and 4 Type3 Type5 Type 6 5 90 - - - - 6.3 100 100 150 - - 10 130 130 180 - - 12,5 180 150 230 200 - 16 200 190 250 - - 19 240 230 300 280 240 25 300 300 340 350 305 31,5 420 380 460 455 420 38 500 450 560 560 510 51 630 600 660 710 635 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 23:27:33 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6805:1994(E) Q IS0 8 Length of hose 8.1 The hose shall be supplied in lengths as speci- fied by the purchaser, subject to a tolerance on the specified lengths of f 2 %. 8.2 When no specific lengths are ordered, the per- centages of different lengths in any given bulk deliv- ery shall be: a) over 13 m: not less than 65 % b) 7.5 m to 13 m: not more than 35 % c) 1 m to 7.5 m: not more than 10 % No length shall be less than 1 m. 9 Impulse test requirements 9.1 When tested in accordance with the require- ments of IS0 6803 with the following parameters for test pressure: types 1 to 5: 133 % of the maximum working pressure given in table8, type 6: 120 % of the maximum working pressure given in table8, hose assemblies shall withstand a minimum number of impulse cycles as follows: type 1: 200 000 cycles, types 2 and 4: 100 000 cycles, types 3 and 5: 400 000 cycles, type 6: 500 000 cycles. 9.2 The oil circulating in the hose assemblies under test shall be maintained at a temperature of 55 “C f 5 “C for types 2 and 4; 121 “C k 5 “C for type 6. 9.3 There shall be no leakage or other malfunction after the specified number of cycles. Leakage at the end fitting, fitting blow-off or rupture of the hose adjacent to the fitting shall be considered as a failure of the assembly. Such failures do not necessarily demonstrate an inability of the hose to meet the specified requirements with an alternative fitting. The mode and position of any failures shall be re- corded. In addition to being capable of meeting the impulse test described in 9.1, 6,3 mm and 10 mm hose of type 2 shall also be capable of meeting the following impulse test: When tested to an impulse pressure of 76,0 MPa (760 bar) (for 6,3 mm hose) or 65,5 MPa (655 bar) (for 10 mm hose) in accordance with IS0 6803, the hose shall be required to achieve 5 000 impulse cy- cles without failure. Thr