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1、BRITISH STANDARD BS 4213:2004 Cisterns for domestic use Cold water storage and combined feed and expansion (thermoplastic) cisterns up to 500 l Specification ICS 91.140.60 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4213:2004 This B
2、ritish Standard was published under the authority of the Standards Policy and Strategy Committee on 10 March 2004. BSI 10 March 2004 First published October 1967 Second edition September 1975 Third edition August 1986 Fourth edition May 1991 Fifth edition March 2004 The following BSI references rela
3、te to the work on this British Standard: Committee reference PRI/62 Draft for comment: 02/122802 DC ISBN 0 580 43333 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/62, Static thermoplastics tanks, upon which the fo
4、llowing bodies were represented: Association of Tank and Cistern Manufacturers British Chemical Distributors and Traders British Plastics Federation Chemical Industries Association (CIA) Federation of Petroleum Suppliers Institute of Materials, Minerals and Mining Oil Firing Technical Association (O
5、FTEC) Water UK Welding Institute Co-opted members Amendments issued since publication Amd No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4213:2004 BSI 10 March 2004 i Contents Page Committees responsibleInside front cover
6、 Forewordii 1Scope1 2Normative references1 3Terms and definitions1 4General2 5Materials3 6Configuration3 7Performance requirements3 8Covers6 9Marking7 10Additional fittings8 Annex A (informative) Notes on installation of cisterns10 Annex B (normative) Method of test for determination of toluene extr
7、act of carbon black10 Annex C (normative) Sampling and testing11 Annex D (normative) Methods of test for resistance to deformation12 Annex E (normative) Method of test for resistance to deflection13 Annex F (normative) Method of test for fatigue resistance15 Annex G (normative) Method of test for im
8、pact resistance15 Annex H (normative) Method of test for tensile strength and elongation at break15 Annex I (normative) Method of test for resistance to reversion16 Annex J (normative) Method of test for resistance to sprue strain16 Annex K (normative) Method of test for resistance to delamination17
9、 Annex L (normative) Method of test for weathering17 Annex M (normative) Method of test for hot water resistance17 Annex N (normative) Method of test for closeness of cover fitting19 Annex O (normative) Method of test for the assessment of ingress of particles 21 Annex P (normative) Method of test f
10、or determining the impact resistance of covers22 Annex Q (normative) Method of test for thermal insulation22 Bibliography25 Figure 1 Installation instructions7 Figure D.1 Centreline measurement13 Figure E.1 Arrangement for the deflection test and fatigue test14 Figure M.1 Typical installation for ho
11、t water test: elevation18 Figure M.2 Typical installation for hot water test: plan view19 Figure N.1 Typical installation for cover fitting test20 Figure O.1 Typical installation of cistern in test box for the particle ingress test21 Figure Q.1 Apparatus for the insulation test23 Table 1 Position of
12、 water line2 Table 2 Types of delamination5 Table C.1 Type tests11 Table C.2 Routine tests12 Table I.1 Testing conditions for reversion and sprue strain16 Table K.1 Immersion media17 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4213:20
13、04 ii BSI 10 March 2004 Foreword This British Standard has been prepared by Technical Committee PRI/62. It supersedes BS 4213:1991, which will be withdrawn three months after the publication date of this revision. The specification covers cisterns up to 500 l capacity from which water is drawn for d
14、omestic purposes. It provides methods of test for the evaluation of the properties of cisterns and covers made by any of the processes currently available. This new edition represents a full revision of the standard. It takes into account the Water Supply (Water Quality) Regulations 2001 1, the Wate
15、r Supply (Water Quality) (Scotland) Regulations 2001 and subsequent amendments 2 and the Water Supply (Water Quality) Regulations (Northern Ireland) 2002 and subsequent amendments 3, which include detailed provisions to safeguard the integrity of stored water for domestic (i.e. drinking, washing, co
16、oking and sanitary) purposes. It also takes into account EC Directive 98/83/EC 4, which implies that water quality from any domestic draw-off point should be of drinking water quality. It includes requirements for both cisterns and their associated fittings to assist in safeguarding against waste an
17、d contamination, and insulation requirements to reduce the likelihood of the stored water freezing or warming. It also gives a method of test for the assessment of the ingress of particles and insects. As in the previous editions, the specification is confined to cisterns produced from thermoplastic
18、s, although an outer reinforcing layer of an unspecified composition is permitted. As a result of problems encountered when analysing processed material, this British Standard requires all materials to conform to BS 6920-1. The details of the analytical methods for determining the permitted antioxid
19、ants are not given in this British Standard, but reference is made to the relevant methods in BS 2782. Because slight changes are necessary in plumbing practice when using thermoplastics cisterns as opposed to more rigid materials, additional recommendations for installation are given in Annex A. Up
20、on publication of this revision, BSI Sales Department will respond to purchase orders for BS 4213 by supplying copies of the 2004 edition. Copies of the 1991 edition may be obtained until it is withdrawn by quoting BS 4213:1991. This publication does not purport to include all the necessary provisio
21、ns of a contract. Users are responsible 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, pages i and ii, pages 1 to 25 and a back cover. The BSI co
22、pyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4213:2004 BSI 10 March 2004 1 1 Scope This British Standard specifies requirements for the materials, p
23、hysical properties and performance of cold water storage cisterns and combined feed and expansion cisterns of up to 500 l capacity, from which water is drawn for domestic purposes. It also specifies requirements for the associated fittings of such cisterns, i.e. covers, screened breathers, screened
24、warning pipes and vent pipe entry devices, and for cistern insulation. It gives methods of test for the evaluation of the properties of cisterns and covers made by any of the processes currently available. This British Standard applies only to cisterns that are manufactured from thermoplastics, and
25、that have covers manufactured either from thermoplastics or from other manufactured materials having a thermoplastics layer on the inside face. It covers both circular and non-circular cisterns, but does not apply to flushing cisterns. 2 Normative references The following referenced documents are in
26、dispensable 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. BS 1566-1:2002, Copper indirect cylinders for domestic purposes Part 1: Open vented copper
27、 cylinders Requirements and test methods. BS 2071, Specification for Soxhlet extractors. BS 2782-4:Method 452B, Methods of testing plastics Chemical properties Determination of carbon black content of polyolefin compound. BS 2782-8:Methods 823A and 823B:1978, Methods of testing plastics Other proper
28、ties Methods for the assessment of carbon black dispersion in polyethylene using a microscope. BS 4781, Specification for pressure-sensitive adhesive plastics labels for permanent use. BS 6920-1, Suitability of non-metallic products for use in contact with water intended for human consumption with r
29、egard to their effect on the quality of the water Part 1: Specification. BS EN 1057, Copper and copper alloys Seamless, round copper tubes for water and gas in sanitary and heating applications. BS EN 60335-2-73, Specification for safety of household and similar electrical appliances Part 2: Particu
30、lar requirements Section 2-73: Fixed immersion heaters. BS EN ISO 527-1 (BS 2782-3:Method 321), Plastics Determination of tensile properties Part 1: General principles. BS EN ISO 4892-2, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc sources. 3 Terms and definitions For t
31、he purposes of this British Standard the following definitions apply. 3.1 additional fitting kit assembly of additional fittings for a cistern 3.2 capacity volume of a cistern measured up to the water line Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled C
32、opy, (c) BSI BS 4213:2004 2 BSI 10 March 2004 3.3 cisterns 3.3.1 cistern fixed container for holding water at atmospheric pressure NOTEThe water is usually supplied through a float-operated valve. 3.3.2 cold water storage cistern cistern, including cover and additional fitting kit (3.1), used only f
33、or storing cold water for domestic (i.e. drinking, washing, cooking and sanitary) purposes 3.3.3 combined feed and expansion cistern cistern used for supplying water to and receiving expansion water from a hot water system 3.4 pipes 3.4.1 breather pipe or hole which allows the free exchange of air w
34、hen the cistern is emptying and filling and which preserves the integrity of the stored water 3.4.2 warning pipe pipe that indicates fault conditions, fixed so that its outlet, whether inside or outside the building, is in a conspicuous position where the discharge of water can be seen 3.4.3 vent pi
35、pe pipe open to the atmosphere and used in connection with a hot water system for the escape of air and/or steam 3.5 top of a cistern plane across the highest point of a cistern excluding any extension of the cistern provided for supporting or securing the removable cover NOTEThis definition applies
36、 to cisterns with part integral or integral covers only. 3.6 water line line marked inside a cistern to indicate the highest water level at which the float-operated valve (or other water inlet-control device) should be adjusted to shut off 4 General The wall thickness of a cistern shall be not less
37、than 1.5 mm. The water line position as specified in Table 1 shall be clearly and durably marked by moulded impression on the wall of the cistern. Table 1 Position of water line Cistern type referenceaMinimum capacity to water line Minimum distance of water line from top of cistern l (gallon)bmm Up
38、to and including XX838 (8)W110 Including and above XX1568 (15)W115 a See 9.1. b 1 gallon = 4.546 09 l Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4213:2004 BSI 10 March 2004 3 5 Materials 5.1 General All materials used for cisterns, c
39、overs and additional fittings that are, or are likely to be, in contact with water (including condensation) shall conform to the requirements of BS 6920-1. 5.2 Carbon black Where carbon black is used it shall conform to the following requirements. a) When tested in accordance with BS 2782-4:Method 4
40、52B, the carbon content shall be not less than 0.5 % and not greater than 3.0 %. b) The density shall be W1.5 g/cm3 and u2.0 g/cm3. c) The total amount of volatile matter shall not exceed a mass fraction of 9.0 %. d) The average particle size shall be not less than 0.010 4m and not greater than 0.02
41、5 4m. e) When determined in accordance with Annex B, the total amount of toluene extract shall not exceed a mass fraction of 0.10 %. f) When tested in accordance with BS 2782-8:Method 823A, the carbon black dispersion in the cistern shall show a numerical rating of 3 or less and the uniformity of ap
42、pearance in respect of smears and streaks shall be equal to or better than photomicrograph A of BS 2782-8:Method 823A:1978, Figure 1. 5.3 Rework No rework material, other than the addition of a mass fraction no greater than 15 % of the manufacturers own rework material of the same type, resulting fr
43、om the manufacture of cisterns conforming to the requirements of this British Standard, shall be used. 6 Configuration Where a change in direction of the cistern wall is necessary, this shall be accomplished by the use of a radius not less than 3 mm. Where the walls of a cistern within 115 mm of the
44、 top or bottom of the cistern are tapered, the taper shall not exceed 5 from the vertical, except where ribs are positioned. Where a connection passes through the cistern, a means of excluding external condensate shall be provided. NOTE 1The cistern surface should have an even texture and should be
45、free from surface imperfections, which detract from the performance of the cistern in use. NOTE 2Any backing plate for a float-operated valve to be fixed externally to the cistern is normally supplied treated to prevent corrosion, free from sharp edges or sharp corners and drilled to provide a 22 mm
46、 diameter hole. NOTE 3Ribs should not interfere with pipe installation. 7 Performance requirements 7.1 General The tests cited in 7.2 to 7.11 shall be carried out as either type tests or routine tests in accordance with Annex C. 7.2 Resistance to deformation 7.2.1 Circular cisterns When tested in ac
47、cordance with Annex D, method 1, the difference between the circumferential measurements of a circular cistern shall be not greater than 2 % of the original circumferential measurement. 7.2.2 Non-circular cisterns When tested in accordance with Annex D, method 2, the deformation in either direction
48、of a non-circular cistern shall be not greater than 2 %. 7.3 Resistance to deflection When measured in accordance with Annex E, the deflection shall not exceed 32 mm. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:15:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4213:2004 4 BSI 10 Marc
49、h 2004 7.4 Fatigue resistance When tested in accordance with Annex F, there shall be no cracking of the cistern in the region of the inlet hole. 7.5 Impact resistance When tested in accordance with Annex G, any impact shall neither split nor puncture the cistern. 7.6 Tensile strength and elongation at break When tested in accordance with Annex H, the ultimate tensile strength of the polyolefin fitting of the wall of the cistern shal