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1、BRITISH STANDARD BS 5608:1993 Specification for Preformed rigid polyurethane (PUR) and polyisocyanurate (PIR) foams for thermal insulation of pipework and equipment Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:04:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5608:1993 This British St
2、andard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 November 1993 BSI 07-1999 First published December 1978 Second edition June 1986 Third edition November 1993 Th
3、e following BSI references relate to the work on this standard: Committee reference PRM/72 Draft for comment 92/46013 DC ISBN 0 580 22273 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (P
4、RM/-) to Technical Committee PRM/72, upon which the following bodies were represented: Association of Building Component Manufacturers Brick Development Association British Board of Agrment British Plastics Federation British Rigid Urethane Foam Manufacturers Association Calcium Silicate Brick Assoc
5、iation Limited Cavity Foam Bureau Department of the Environment (Building Research Establishment) Department of the Environment (Construction Industries Directorate) Engineering Equipment and Materials Users Association European Phenolic Foam Association Flat Roofing Contractors Advisory Board Minis
6、try of Defence National Federation of Roofing Contractors National House-building Council Polyethylene Foam Insulation Association Royal Institute of British Architects The following bodies were also represented in the drafting of the standard through subcommittees and panels: British Ceramic Resear
7、ch Ltd. British Urethane Contractors Association (BUFCA) RAPRA Technology Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:04:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5608:1993 BSI 07-1999i Contents Page Committees respon
8、sibleInside front cover Forewordii 1Scope 1 2References1 3Designation1 4Composition1 5Physical properties2 6Dimensions and dimensional tolerances2 7Condition and appearance2 8Sampling2 9General requirements3 10Marking3 Annex A (normative) Method of preparation of a moulded flat test piece4 Annex B (
9、informative) Guidance on thermal conductivity design and 3 day values4 Annex C (normative) Method of test for compression characteristics4 Annex D (normative) Method of test for dimensional stability4 Annex E (informative) Burning properties of rigid PUR and PIR foam and recommendations for use4 Ann
10、ex F (informative) Notes for designers5 Table 1 Designation codes for thermal conductivity1 Table 2 Physical property requirements2 Table 3 Dimensional tolerances for pipe sections and lags3 Table 4 Dimensional tolerances for slabs3 List of referencesInside back cover Licensed Copy: sheffieldun shef
11、fieldun, na, Mon Dec 04 16:04:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5608:1993 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Plastics and Rubber Standards Policy Committee. It supersedes BS 5608:1986 which is withdrawn. In the 1986 edition one c
12、ategory of rigid polyurethane (PUR) and polyisocyanurate (PIR) foam products was excluded, the continuously formed pipe sections; and one category added, slabs. The performance requirements and test methods were updated from the 1978 edition together with the guidance on burning properties and recom
13、mendations regarding their use. This edition introduces technical changes but it does not reflect a full review or revision of the standard. Requirements have been included for thermal conductivity to be designated by the manufacturer. It is envisaged that this standard will be replaced by a Europea
14、n Standard in due course and that the European Standard will be adopted in the BS EN series. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does no
15、t 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 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This w
16、ill be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:04:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5608:1993 BSI 07-19991 1 Scope This British Standard specifies the composition, physical properties and dimensional toleran
17、ces for preformed rigid polyurethane (PUR) and polyisocyanurate (PIR) foams for the thermal insulation of pipework and equipment. It applies to slabs, cut and moulded pipe sections and radiused and bevelled lags. The nominal temperature range f or which the insulation material is suitable is 180 C t
18、o + 140 C (see Annex F). NOTE 1No values are specified in this standard for the length, bore and outside diameter of pipe sections and lags or for the length and width of slab stock; these should be as specified by the purchaser. 2 References 2.1 Normative references This British Standard incorporat
19、es, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on this inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this British
20、Standard only when incorporated in it by updating or revision. 2.2 Informative references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but ref
21、erence should be made to the latest editions. 3 Designation For the purposes of this British Standard, the materials are divided into four types as follows. The designation shall consist of a three component code comprising the following items, in the order presented: a) the number and date of this
22、British Standard, i.e. BS 5608:1993 b) a number indicating the foam type; c) a double digit number to indicate the thermal conductivity selected in accordance with Table 1. An example of the designation required for a type 4 foam with a thermal conductivity of 0.020 W/mK) is as follows: BS 5608:1993
23、/4/20. NOTEAnnex F gives additional guidance on the applications of these categories. Table 1 Designation codes for thermal conductivity 4 Composition The material shall consist of rigid polyurethane or rigid polyisocyanurate foam with a closed cell structure. The material shall be suitably formulat
24、ed to ensure that, when tested by the method described in BS 4735:1974, a test specimen of 150 mm 50 mm 13 mm exposed to a small flame shall show an extent burnt of less than 125 mm for rigid polyurethane foam and less than 25 mm for rigid polyisocyanurate foam. NOTEMaterials indicated by PUR are su
25、bstantially composed of polyurethane linkages and those indicated by PIR are substantially composed of polyisocyanurate linkages. Type 1 Polyurethane foams suitable for general use Type 2 Polyurethane foams suitable for use where there is a requirement for greater resistance to compressive forces Ty
26、pe 3 Polyisocyanurate foams suitable for general use Type 4 Polyisocyanurate foams suitable for use where there is a requirement for greater resistance to compressive forces Thermal conductivity (see 5.1) W/(mK) Code 0.015 0.016 0.017 0.018 0.019 0.020 0.021 0.022 0.023 0.024 0.025 0.026 0.027 0.028
27、 0.029 0.030 0.031 0.032 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 NOTEThese values are 30 day values for quality control purposes. For corresponding long-term design values the manufacturers advice should be sought (see Annex B). Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16
28、:04:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5608:1993 2 BSI 07-1999 5 Physical properties 5.1 Thermal conductivity Thermal conductivity shall be determined by either method 7A or 7B of BS 4370-2:1992 at a mean temperature of 10 C, (30 2) days after manufacture. Materials shall be conditione
29、d throughout this period at (23 2) C and (50 5) % r.h. NOTESee additional guidance in Annex B on information concerning the thermal conductivity 3 day values and design values. 5.2 Other properties The materials shall conform to the requirements in Table 2 when tested in accordance with the methods
30、listed therein. 6 Dimensions and dimensional tolerances 6.1 For single-layer components or the first layer of a multi-layer component, the bore shall be the specified outside diameter of the pipe to be lagged. For the second and subsequent layers of a multi-layer component, the bore shall be the spe
31、cified diameter of the mating inner layer. 6.2 The dimensions of the product supplied shall not deviate from those specified by more than the appropriate tolerances given in either Table 3 or Table 4. For slabs the permissible thickness deviations shall be 1.5 mm. 7 Condition and appearance The mate
32、rial shall have a uniform fine cellular structure. NOTE 1In the case of moulded products there will normally be a skin which can vary in thickness. NOTE 2The condition, appearance and odour of the product may be agreed on the basis of an approved sample. 8 Sampling The frequency of sampling shall co
33、mply with the requirements of clause 3 of BS 2972:1989. Where it is not possible to cut test specimens from the product, cut or moulded test pieces which shall be of the same formulation and density as the material supplied shall be used (see Annex A). Table 2 Physical property requirements Physical
34、 propertyTypeMethod of test 1234 Minimum compressive strength or compressive stress at 10 % strain, kPa 100210100210Annex C Dimensional stability: maximum percentage linear change Test conditions Annex D 24 h at 15 C 2 C1111 24 h at 100 C 2 C2222 24 h at 125 C 2 C22 24 h at 70 C 2 C3333 and 95 C 5 %
35、 r.h. Closed cell content: minimum apparent volume percentage 85858585BS 4370-2:1993 method 10 Burning characteristics1): extent burnt, mm less than 125 less than 125 less than 25 less than 25 BS 4735:1974 Maximum water vapour permeability at 38 C and 88 % r.h., ng/(Pasm) 5.55.58.58.5BS 4370-2:1993
36、method 8, condition a) CAUTION. The small-scale laboratory test described in BS 4735 is solely for assistance in monitoring consistency of production and is not a means of assessing the potential fire hazard of a material is use (see Annex E). Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 1
37、6:04:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5608:1993 BSI 07-19993 9 General requirements 9.1 Pipe sections 9.1.1 Pipe sections shall be supplied in two semicircular pieces; the longitudinally mating faces shall be flat and in the same plane, so that when the two pieces are put together no
38、 gaps exist between the mating surfaces. NOTEIt is common practice for the mating faces whilst still being flat in the lengthwise direction to have a variable profile in the radial direction. This is acceptable provided that the mating surfaces so created still fit snugly together. In many cases thi
39、s practice enhances the “snugness” of the fit. 9.1.2 The ends shah be flat and normal to the longitudinal axis of the section. 9.2 Radiused and bevelled lags 9.2.1 The mating bevelled edges shall be flat, so that when they are put together to form a cylinder no gaps exist between abutting lags. 9.2.
40、2 The ends shall be flat and normal to the longitudinal axis of the lag. NOTENo values are specified for their width on the outer and inner faces. 9.3 Moulded components All moulded items shall be free from grease or other moulding release agent that will adversely reduce the adhesion of insulation,
41、 mastics and adhesives. 9.4 Colour identification PIR foam shall be supplied coloured pink. PUR foam shall be supplied in any other colour or without added colour as required. 10 Marking The product, packages or invoice shall be marked with at least the following information. a) manufacturers name o
42、r trademark; b) product designation as given in clause 31); c) manufacturers description and/or product reference. Table 3 Dimensional tolerances for pipe sections and lags Table 4 Dimensional tolerances for slabs 1) Marking BS 5608:1993 on or in relation to a product represents a manufacturers decl
43、aration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be
44、desirable. Dimensions in millimetres DimensionsPermissible deviations Moulded pipe sections Cut pipe sections and lags Lengths 3 3 Bores less than 150 Bores 150 and above Outside diameters less than 150 Outside diameters 150 and above NOTEFor single-layer components or the first layer of a multi-lay
45、er component the tolerance on the bore is given on the quoted pipe outside diameter. For the second or subsequent layer(s) of multi-layer components it is given on the outside diameter of the mating inner layer. Lengths or widthsPermissible deviations of lengths or widths Maximum differences in the
46、lengths of the diagonals of rectangular slabs Up to and including 100 13 Over 100 up to and including 1 000 1.55 Over 1 000 up to and including 2 000 2.57 +1.5 0 +1.5 0 +3 0 +1.5 0 +1.5 0 +1.5 0 + 3 0 +1.5 0 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:04:53 GMT+00:00 2006, Uncontrolled
47、 Copy, (c) BSI BS 5608:1993 4 BSI 07-1999 Annex A (normative) Method of preparation of a moulded flat test piece If it is not possible to cut test pieces from the product, use a mould with internal dimensions of 460 mm 460 mm 60 mm. A mould constructed of two flat metal plates separated by a framewo
48、rk of four square sectional battens, with small vents at the corners, is recommended. Treat the inside of the mould with a suitable release agent to facilitate the release of the moulding. Preheat the mould to a suitable temperature. Into the middle of the mould place the amount of unfoamed chemical
49、 calculated to give a density equal to that of the final product and immediately close the mould. Release the mould and remove the product after the required mould residence time has elapsed. Annex B (informative) Guidance on thermal conductivity design and 3 day values In addition to the 30 day maximum thermal conductivity value which forms the specification value for the purposes of this standard, two related maximum thermal conductivity values have practical importance, and should be ob
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