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1、INTERNATIONAL STANDARD IS0 8361-3 First edition 1991-09-01 Thermoplastics pipes and fittings - Water absorption - Part 3: Test conditions for acrylonitrile/butadiene/styrene (ABS) pipes and fittings Tubes et raccords en matitkes thermoplastiques - Absorption deau - Partie 3: Conditions particuli&es
2、dessai pour tubes et raccords tin acrylonitrilelbutadiAnelstyr&ne (ABS) Reference number IS0 8361-3:1991(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:20:25 MDTNo reprodu
3、ction or networking permitted without license from IHS -,-,- IS0 8361-3:1991(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
4、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, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborat
5、es 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 Inter- national Standard requires approval by at
6、 least 75 % of the member bodies casting a vote. International Standard IS0 8361-3 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids. IS0 8361 consists of the following parts, under the general title Thermoplastics pipes and fittings - Wa
7、ter absorption: - fart I: Genera/ test method - Part 2: Test conditions for unplasticized poly(vinyl chloride) (PVC-U) pipes and fittings - Part 3: Test conditions for acrylonitrilelbutadienelstyrene (ABS) pipes and fittings NOTE - Pipes and fittings made of other materials, i.e. chlorinated poyly(v
8、inyl chloride) (PVC-C), high-impact poly(vinyl chloride) (PVC-HI), and acrylonitrile/styrene/acrylate (ASA), will be dealt with later in addi- tional parts. Annex A of this part of IS0 8361 is for information only. 0 IS0 1991 All rights reserved. No part of this publication may be reproduced or util
9、ized In any form or by any means, electronic or mechanical, Including photocopying and microfilm, without permlsslon In wrltlng from the publlsher. lnternatlonal Organization for Standardlzatlon Case Postale 56 l CH-1211 Geneve 20 l Swltzerland Prlked In Switzerland ii Copyright International Organi
10、zation for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:20:25 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 8361-3:1991(E) Thermoplastics pipes and fittings -
11、 Water absorption - Part 3: Test conditions for acrylonitrile/butadiene/styrene (ABS) pipes and fittings 1 Scope This part of IS0 8361 specifies the test conditions for determining the water absorption of acrylonitriie/ butadienektyrene (ABS) pipes and fittings, what- ever their applications and use
12、, which contain only the necessary antioxidants and stabilizers together with any necessary pigments. NOTE 1 The general test method for the determination of the water absorption of thermoplastics pipes and fit- tings is given in IS0 8361-1. This part of IS0 8361 also gives, for information purposes
13、, the preferred maximum value of the water absorption. The water absorption values appropriate for the in- tended applications of particular ABS pipes and fit- tings are specified in the relevant product standards. 2 Normative references The following standards contain provisions which, through refe
14、rence in this text, constitute provisions of this part of IS0 8361. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 8361 are encouraged to investi- gate the possibility of applying the most rece
15、nt edi- tions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid In- ternational Standards. IS0 3126:1974, Plastics pipes - Measurement of di- mensions. IS0 7245:1984, Pipes and fittings of acrylonitrilelbutadiene/styrene (ABS) - General specification for
16、moulding and extrusion materials. IS0 8361-1:1991, Thermoplastics pipes and fittings - Water absorption - Part 1: Genera/ test Method. 3 Principle Test pieces are first coriditioned and their mass and total surface area determined. The conditioned test pieces are then immersed for 24 h in distilled
17、water 90 “C. The mass of each test piece is determined again, and the change in mass per unit area calculated. 4 Requirements on materials Materials for ABS pipes and fittings shall satisfy the requirements of IS0 7245. 5 Procedure 5.1 Measure the dimensions of the test pieces in accordance with 7.1
18、 of IS0 8361-1:1991. 5.2 Calculate the total area /i of each of the test pieces in accordance with 7.1 of IS0 8361-1:1991. 5.3 Place the test pieces (see clause 6 of IS0 8361-1:1991) in the forced-air oven (5.4 in IS0 8361-1:1991), maintained at 90 “C + 2 “C, for 2 h. 5.4 Remove the test pieces from
19、 the oven and leave them to cool in air at 23C & 2 “C and (50 f 5) % relative humidity for 15 min + 1 min. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:20:25 MDTNo reproduc
20、tion or networking permitted without license from IHS -,-,- IS0 8361-3:1991(E) 5.5 Determine the mass m, in accordance with 7.3 of IS0 8361-1:1991. 5.6 Immerse the test pieces (see 7.4 of IS0 8361-1:1991) in distilled water (4.2 In IS0 836%1:1991) at (90 “,) OC for 24 h. 5.7 Remove the test pieces a
21、nd leave them to cool in the bath (5.3 of IS0 836%1:1991) at 23 “C & 2 OC for 15 min &- 1 min, in accordance with 7.5 of IS0 8361-1:1991. 5.8 Remove the test pieces from the bath and wipe with filter paper in accordance with 7.6 of IS0 8361-1:1991. 5.9 Determine the mass iq of each test piece in acc
22、ordance with 7.8 of IS0 8361-1:1991. 5.10 Express the results in accordance with clause 8 of IS0 8361-1:1991. 6 Test report See clause 9 of IS0 8361-1:1991. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
23、Not for Resale, 04/27/2007 21:20:25 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8361-3:1991(E) Annex A (informative) Basic specification After testing in accordance with the test conditions specified in clause 7 of IS0 8361-I:1991 and clause 5 of this part of IS0 83
24、61, the water absorption should not be greater than 40 g/ma. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:20:25 MDTNo reproduction or networking permitted without license
25、 from IHS -,-,- IS0 8361-3:1991(E) UDC 621.643.06 + .2-036.073:532.696.52 Descriptors: thermoplastic resins, ABS plastics, plastics products, plastic tubes, pipe fittings, tests, water absorption tests, testing condltlons. Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:20:25 MDTNo reproduction or networking permitted without license from IHS -,-,-
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