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1、BRITISH STANDARD BS ISO 4179:2005 Ductile iron pipes and fittings for pressure and non-pressure pipelines Cement mortar lining ICS 23.040.10; 77.140.75 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 4179:2005 This British Standard
2、was published under the authority of the Standards Policy and Strategy Committee on 22 July 2005 BSI 22 July 2005 ISBN 0 580 46266 8 National foreword This British Standard reproduces verbatim ISO 4179:2005 and implements it as the UK national standard. The UK participation in its preparation was en
3、trusted to Technical Committee PSE/10, Iron pipes and fittings, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor rel
4、ated international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found i
5、n 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 include all the necessary provisions of a contract. Users are responsi
6、ble for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 6, an inside back cover and a b
7、ack 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 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO
8、4179 Third edition 2005-02-15 Reference number ISO 4179:2005(E) Ductile iron pipes and fittings for pressure and non-pressure pipelines Cement mortar lining Tuyaux et raccords en fonte ductile pour canalisations avec et sans pression Revtement interne de mortier de ciment BS ISO 4179:2005 Licensed C
9、opy: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 4179:2005 iii Foreword ISO (the International Organization for Standardization) is a w
10、orldwide federation of national 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
11、on that committee. International 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 drafte
12、d 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 Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Stand
13、ard 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 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4179 was prepared by
14、Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 2, Cast iron pipes, fittings and their joints. This third edition cancels and replaces the second edition (ISO 4179:1985), which has been technically revised. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
15、26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI . iv Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Ductile iron pipes and fittings for pressure and non-pressure pipelines Cement mortar lining 1Scope This International Standard spe
16、cifies the nature, the method of application, the surface condition and the minimum thickness of internal linings of cement mortar for ductile iron pipes and fittings for pressure and non- pressure pipelines as defined in ISO 2531 and ISO 7186. It covers cement mortar linings which are used to impro
17、ve the hydraulic properties of pipes and fittings compared to un-lined pipes and fittings and/or to prevent corrosion damage and includes special requirements for linings of gravity sewers operating partially filled. It also covers linings used for the conveyance of particularly aggressive fluids, w
18、here the following solutions may be used either separately or in combination: a)an increase in the thickness of the lining; b)a change of the type of cement; c)a coating over the lining. 2Normative references The following referenced documents are indispensable for the application of this document.
19、For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2531:1998, Ductile iron pipes, fittings, accessories and their joints for water or gas applications ISO 7186:1996, Ductile iron products
20、 for sewage applications ISO 16132, Ductile iron pipes and fittings Seal coats for cement mortar linings 3Materials 3.1Cement The cement used for the lining shall comply with the cement standard(s) in application in the country of pipe manufacture. Unless otherwise specified, the type of cement shal
21、l be selected by the manufacturer in order to be suitable for the nature of the fluid to be transported, with due consideration to ISO 2531:1998, Annex B, and ISO 7186:1996, Annex B. 3.2Sand The sand used shall have a controlled granulometric distribution from fine to coarser elements; it shall be c
22、lean and shall be composed of inert, hard, strong and stable granular particles. The granulometric curve for the sand shall be appropriate to the lining method, the lining thickness and the surface conditions required in Clause 6. BS ISO 4179:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
23、26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 4179:2005 2 Sampling shall be carried out in accordance with national standards for the testing of construction materials. The cleanliness of the sand shall be evaluated in terms of organic impurities and clay-bearing substances according
24、 to the methods described below. The test for organic impurities shall be carried out by a colorimetric method in accordance with the standards in force in the producing country; the sand shall not produce any coloration darker than that of the reference solution. The determination of the content of
25、 clay-bearing substances in the sand (having dimensions less than to depending on the country) shall be carried out in accordance with the standards in force in the producing country; it shall not exceed by mass. 3.3 Mixing water The water used for the preparation of the mortar shall be either potab
26、le water or water free from substances deleterious either to the mortar or to the water to be transported in the pipeline. The presence of solid mineral particles is, however, admissible provided that these requirements are still fulfilled. Existing national hygienic requirements have to be complied
27、 with. 3.4 Mortar The fresh mortar of the lining shall be composed of cement, sand and water complying with 3.1, 3.2 and 3.3 respectively. Additives may be used, provided that they do not prejudice the quality of the lining and that of the transported water, the lining remains in accordance with all
28、 the requirements of this International Standard, and they comply with the hygienic requirements of the country where the pipes and fittings are to be installed. The mortar shall contain at least one part of cement to 3,5 parts of sand by mass (i.e. S/C by mass in the mortar). The respective proport
29、ions of sand and water to cement (S/C and W/C) shall be selected and controlled by the manufacturer in order to achieve compliance with this standard. The methods of determination of the ratios S/C and W/C shall be specified by the manufacturer. 4Application of lining 4.1 Condition of interior surfa
30、ce of pipe before application of lining All foreign bodies, Ioose scale or any other material which could be detrimental to good adhesion between the metal and the lining shall be removed from the surface to which the lining shall be applied. The inner surface of the pipe and fitting shall also be f
31、ree of any metal projections likely to protrude beyond of the thickness of the lining. 4.2 Method of application The mortar shall be thoroughly mixed in order to achieve the appropriate consistency and homogeneity. For pipes, the mortar is centrifugally cast inside the pipes or projected onto the wa
32、ll by means of a rotating projection head or using a combination of both methods depending on the manufacturers decision. For fittings, the mortar is projected onto the wall by means of a rotating projection head, or may be placed by hand using appropriate trowels. 63m 90m 2 % ?3,5 50 % Licensed Cop
33、y: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Apart from the inner surface of the socket, the parts of the pipe or fitting coming in contact with the transported water shall be entirely covered with mortar. The consistency of the mortar, the time an
34、d the speed of centrifugation, and the speeds of rotation and translation of the projection head shall be controlled so as to achieve a dense and continuous lining. The mortar shall be free of any cavities or visible air bubbles, so that minimum thickness and optimum density are ensured at all point
35、s. 4.3Curing The fresh lining shall be cured at temperatures greater than . Any loss of water from the mortar by evaporation shall be sufficiently slow that hardening is not impeded. This may be achieved, for example, by means of controlled atmosphere, closed pipe ends or by application of a seal co
36、at to the still moist lining. The curing conditions shall be such as to achieve sufficient hardening of the lining and compliance with the requirements of Clause 6. 4.4Seal coat Unless otherwise specified, the manufacturer has the option of providing or not providing a seal coat. The seal coat shall
37、 not affect adversely the quality of the transported water. For water intended for human consumption, national hygienic requirements in force in the country where the pipes and fittings are to be installed shall be fulfilled. When a seal coat is supplied, it shall be in accordance with ISO 16132. 4.
38、5Repairs Repairs to damaged or defective areas are allowed. They should be carried out according to the manufacturers instructions. The damaged mortar shall first be removed from these areas. Then the defective part shall be repaired by using, for example, a trowel with fresh mortar so that a contin
39、uous lining having a constant thickness is again obtained. For the repair operation, the mortar shall have a suitable consistency; if necessary, additives may be included to obtain good adhesion against the side of the existing undamaged mortar. Sufficient curing shall be provided to the repaired ar
40、eas. 5Thickness of lining 5.1Thickness requirements The nominal thickness of the lining and the minimum thickness at one point are given in Table 1. The lining thickness measured at any one point in the pipe shall not be smaller than the minimum value given in Table 1. For partially filled sewage pi
41、pelines, by agreement between manufacturer and purchaser, the lining thickness may be increased, and/or high alumina cement mortar, polymer-modified mortar or suitably coated mortar may be used. At the pipe ends, the lining may be reduced to values below the minimum thickness. The length of the cham
42、fer shall be as small as possible but, in any case, shall be less than . 0 C 50 mm BS ISO 4179:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 5.2Determination of lining thickness The thickness of the lining is checked on the freshly
43、applied mortar by the insertion of a steel pin, or on the hardened mortar by means of a non-destructive method of measurement. The thickness of the lining shall be measured at both ends of the pipe in at least one section perpendicular to the pipe axis. In each section, which shall be at least from
44、the pipe end, measurements shall be taken at four points spaced at intervals. The values for the thickness of the lining shall be reported to the nearest . Table 1 Thickness of cement mortar lining DN groupNominal sizeLining thicknessMaximum crack width and radial displacement (potable water) Maximu
45、m crack width (partially filled sewage pipelines) DNnom.min. at one point mmmmmm I 40 320,80,6 50 60 65 80 100 125 150 200 250 300 II 350 530,80,7 400 450 500 600 III 700 63,510,8 800 900 1 000 1 100 1 200 IV 1 400 961,20,8 1 500 1 600 1 800 2 000 V 2 200 1271,50,82 400 2 600 200 mm 90 0,1 mm BS ISO
46、 4179:2005 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:00:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 6Surface condition of hardened lining The cement mortar lining shall exhibit a generally smooth finish on its entire surface. However, the structure of the lining and its surface f
47、inish are related to the lining process; surface textures inherent in the method of manufacture (e.g. orange peel effects) shall be acceptable provided that they do not reduce the thickness of the lining to less than the minimum value at one point as specified in Table 1. Only firmly embedded sand g
48、rains are allowed to appear on the surface of the lining. For centrifugally applied linings, a thin laitance and cement rich layer, comprising fine sand and cement, may be formed on the inner surface of the lining. It may extend up to approximately one-quarter of the total thickness of the mortar. D
49、ue to the complex internal shape of the fittings and to the application process (rotating projection head), the lining of fittings may show a corrugated surface provided that it does not reduce the thickness of the lining to less than the minimum value at one point as specified in Table 1. NOTE 1It is known that the surface condition has very little effect on the hydraulic characteristics, the main factors being the effective internal diameter of the pipes and the shape of the fittings. On contra