1、BRITISH STANDARD BS 3958-5: 1986 Thermal insulating materials Part 5: Specification for bonded man-made mineral fibre slabs UDC 662.998:677.52 412BS3958-5:1986 This British Standard, having been prepared under the direction of the Refrigeration, Heating and Air Conditioning Standards Committee, was
2、published underthe authority of the Executive Board and comes into effect on 28 November 1986 BSI 07-1999 First published August 1969 First revision November 1986 The following BSI references relate to the work on this standard: Committee reference RHE/9 Draft for comment 84/78414 DC ISBN 0 580 1542
3、8 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Refrigeration, Heating and Air Conditioning Standards Committee (RHE/-) to Technical Committee RHE/9, upon which the following bodies were represented: British Ceramic Research Associat
4、ion British Gas Corporation Chartered Institution of Building Services Engineers Combustion Engineering Association Cranfield Institute of Technology Department of Health and Social Security Department of the Environment (Building Research Establishment) Department of Trade and Industry (National Ph
5、ysical Laboratory) Electricity Supply Industry in England and Wales Engineering Equipment and Materials Users Association Eurisol (UK) Association of Manufacturers of Mineral Fibre Insulation Gypsum Products Development Association Institution of Gas Engineers Phenolic Foam Manufacturers Association
6、 Refrigeration Industry Board Royal institute of British Architects Structural Insulation Association Thermal Insulation Manufacturers and Suppliers Association (TIMSA) Thermal Insulations Contractors Association Water-tube Boilermakers Association The following bodies were also represented in the d
7、rafting of the standard, through subcommittees and panels: Albury Laboratories Limited British Rubber Manufacturers Association Calcium Silicate Brick Association Limited Institute of Refrigeration Institution of Mechanical Engineers Yarsley Technical Centre Ltd. Amendments issued since publication
8、Amd. No. Date of issue CommentsBS3958-5:1986 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Sampling and testing 1 4 Composition 1 5 Moisture content 1 6 Physical requirements 1 7 Fire classification 2 8 Chemical requirements 2 9 Sizes o
9、f slabs 2 10 Dimensional tolerances 2 11 External finish 2 12 Marking 2 Appendix A Information to be supplied when ordering 3 Appendix B Method of test for pH value of water extract 3 Appendix C Determination of recovery after compression 3 Table 1 Thermal conductivity values 1 Table 2 Size range of
10、 slabs 2 Publications referred to Inside back coverBS3958-5:1986 ii BSI 07-1999 Foreword This revision of this Part of BS 3958 is one of a series published under the direction of the Refrigeration, Heating and Air Conditioning Standards Committee to specify requirements for a particular range of ins
11、ulating materials. It supersedes the 1969 edition which is withdrawn. The four classification groups of materials, similar to those specified in the 1969 edition, have been retained although in this revision the basis of the classification is that of thermal conductivity, not of density. Thermal con
12、ductivity values have been reviewed and generally improved. The format and presentation of this revision has also been aligned with other recently published Parts of this standard. Other Parts of BS 3958 are: Part 1: Magnesia preformed insulation; Part 2: Calcium silicate preformed insulation; Part
13、3: Metal mesh faced man-made mineral fibre mattresses; Part 4: Bonded preformed man-made mineral fibre pipe sections; Part 6: Finishing materials; hard setting composition, self-setting cement and gypsum plaster. A British Standard does not purport to include all the necessary provisions of a contra
14、ct. Users of British Standards are responsible for their 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, pages1to4, an inside back cover a
15、nd a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BS3958-5:1986 BSI 07-1999 1 1 Scope This Part of BS 3958 specifies composition, moisture content, physical and chemica
16、l requirements, and sizes for bonded man-made mineral fibre slabs for thermal insulating purposes. The material is classified into four groups according to its thermal conductivity and temperature range. Information to be supplied when ordering is given in Appendix A. This standard is not intended t
17、o cover materials used to insulate the fabric of buildings. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 3958, the definitions given in BS874, BS 2972 and BS 3533 apply. 3 Sampling and testing S
18、ampling and testing shall be in accordance with the appropriate clause in BS 2972. Slabs shall be tested without an applied finish. 4 Composition The insulation material shall be of man-made mineral fibre made from rock, slag or glass, processed from a molten state into a fibrous form, and shall be
19、bonded together with a suitable thermosetting binder to form slabs. Slabs shall not contain non-fibrous pieces of these materials that have any dimension exceeding10mm. 5 Moisture content When conditioned at high humidity in accordance with 40.4 of BS 2972:1975, the moisture content of the material
20、shall not exceed 5% by mass. 6 Physical requirements 6.1 Thermal conductivity When tested in accordance with the appropriate method of test for thermal conductivity given in BS874 with a cold face not exceeding 50 C, the measured thermal conductivity shall not exceed the values given in Table 1, for
21、 the appropriate group. Table 1 Thermal conductivity values Some products in a given thermal conductivity group may not, therefore, be capable of being used over the full temperature range indicated in Table 1 and the limiting temperature declared by the manufacturer shall be observed (see 6.4). Som
22、e products may be capable of exceeding the temperature range indicated in Table 1. In this case the manufacturer shall declare values of thermal conductivity at these higher temperatures. NOTEThe groups given in Table 1 are based on thermal conductivity values only. They are not density groups. Howe
23、ver, for general guidance the density ranges associated with these thermal conductivity groups are usually as follows: a) group 1: 15 kg/m 3to 50 kg/m 3 ; b) group 2: 30 kg/m 3to 80 kg/m 3 ; c) group 3: 50 kg/m 3to 160 kg/m 3 ; d) group 4: 140 kg/m 3to 300 kg/m 3 . 6.2 Bulk density For any particula
24、r product, the variation from the manufacturers declared value for bulk density, calculated at the nominal thickness and determined on full-size slabs shall not exceed 15 %. NOTEThe bulk density of the material will normally lie within the range 15 kg/m 3to 300 kg/m 3 . Materials of each group are m
25、ade in a range of densities within this overall range, appropriate to the intended application. 6.3 Heat stability When a sample is heated in accordance with 21.1 of BS 2972:1975 at the stated maximum limiting temperature of use, the material shall maintain its general form and not suffer visible de
26、terioration of the fibrous structure. NOTEColour changes are not relevant. 6.4 Limiting temperature and thickness The manufacturer shall state the maximum limiting temperature and limiting thickness at that temperature. The material shall comply with the requirements of clause 18 of BS 2972:1975. Me
27、an temperature Thermal conductivity Group 1 Group 2 Group 3 Group 4 C W/(mK) W/(mK) W/(mK) W/(mK) 50 100 150 200 250 300 350 400 0.048 0.065 0.089 0.123 0.043 0.052 0.065 0.080 0.104 0.043 0.050 0.060 0.072 0.084 0.102 0.044 0.052 0.060 0.068 0.077 0.088 0.100 0.115BS3958-5:1986 2 BSI 07-1999 6.5 Re
28、covery after compression When tested by the method described in Appendix C, the recovery after compression shall be not less than 95% of the original thickness. 6.6 Vibration settlement When tested in accordance with clause 28 of BS2972:1975 the settlement shall not exceed 2%. 7 Fire classification
29、When tested in accordance with BS 476-11, the furnace temperature shall not rise by more than 50 C, the specimen temperature shall not rise by more than 50 C and the mean duration of sustained flaming shall not exceed 20 s. NOTESome organic matter may be present either in a fibrous form or as a bond
30、ing agent. It is suggested that the composition of the product be checked with the manufacturer for use in process conditions where organic matter may present a hazard, e.g. processes involving powerful oxidizing agents for thermal insulation of pipework and plant in a flammable atmosphere. 8 Chemic
31、al requirements 8.1 pH value of water extract When tested by the method described in Appendix B, the pH value recorded shall be between6.0 and9.0. 8.2 Corrosive attack The material shall not include significant quantities of substances that will promote corrosive attack on the surfaces with which it
32、 is to be in contact. NOTEWater-soluble chlorides are normally present in trace quantities in most commercial thermal insulating materials. In the presence of moisture and oxygen and under certain adverse metallurgical conditions chloride ions are capable of initiating stress corrosion cracking in s
33、usceptible metal alloys such as austenitic stainless steels. It is not practicable to indicate a safe upper limit for chloride content since water can leach out soluble chlorides from substantial volumes of insulating materials and allow them to be concentrated at the metal-insulation interface. In
34、addition, water from outside sources can substantially increase the chloride content of the insulation. In conditions potentially conducive to stress corrosion cracking, appropriate safeguards should be adopted (see 33.17 of BS 5970:1981). Where necessary, trace quantities of water-soluble chlorides
35、 may be estimated in accordance with section 22 of BS2972:1975. 9 Sizes of slabs The range of slab sizes shall be as given in Table 2 (see also item b) of Appendix A). NOTENot all suppliers provide the full range of sizes. Slabs of different sizes from those specified in Table 2, but which are in ac
36、cordance with this standard in other respects, may be available by arrangement with the manufacturer. Table 2 Size range of slabs 10 Dimensional tolerances The dimensions of mineral fibre slabs shall be in accordance with the nominal dimensions stated by the manufacturer (or supplier, as appropriate
37、), subject to the following tolerances. 11 External finish The slabs shall have no applied external finish. NOTETo suit particular applications, slabs having an applied finish on one or both faces, but which are in accordance with this standard in other respects, may be available by arrangement with
38、 the manufacturer (see item c) of Appendix A). 12 Marking Each package of slabs or the slabs themselves, shall be clearly marked with the following: a) the manufacturers name, mark or symbol; b) the manufacturers type designation; c) the nominal dimensions of the slab (length,width and thickness); d
39、) the number of slabs in the package, if applicable; e) the number and date of this British Standard and the applicable thermal conductivity group, e.g.BS 3958-5:1986 1) , group 2. Length and width Thickness mm mm 1200 1200 1200 900 1200 600 900 900 900 600 600 600 25, 40, 50, 75, or 100 Length and
40、width: 0.5% or 5mm, whichever is the greater. Thickness: + 4 mm, 2 mm. 1) Marking BS 3958-5:1986 on or in relation to a product is a claim by the manufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturer
41、s responsibility.Enquiries as to the availability of third party certification should be addressed to the appropriate certification body. BS3958-5:1986 BSI 07-1999 3 Appendix A Information to be supplied when ordering The following information should be supplied with the order: a) the number and dat
42、e of this British Standard, i.e. BS 3958-5:1986; b) the dimensions of the slabs required (seeclause9); c) details of any applied finish, if required (seenote to clause11); d) a note of any unusual condition, e.g. of any acidic or alkaline fumes in the environment of the insulation, or of any other h
43、azardous condition; e) the maximum temperature to which the product will be subjected; f) a note of any special degree of fire safety required, e.g. if the insulation is required to be non-combustible. Appendix B Method of test for pH value of water extract B.1 Preparation of sample From the bulk sa
44、mple, taken in accordance with BS2972, cut five pieces, each of approximate mass5 g, from separate units where possible. Disintegrate these pieces and mix thoroughly. B.2 Determination of pH value of water extract Weigh 2 g of the prepared sample and shake well for10 min with 100 mL of distilled or
45、deionized water (pH 6.5 to 7.5) at room temperature. Leave to settle for 5 min and decant the solution if necessary. Measure the pH of the mixture using a standard pH meter as specified in BS 3145. Repeat the test on a further 2 g of the sample and report both values. Appendix C Determination of rec
46、overy after compression C.1 Test specimens Five test specimens shall be tested. Each shall be of the thickness supplied or a multiple of the thickness (by plying two or more pieces). The specimens shall be square with an edge length of 100 mm or twice the total thickness of the specimen, whichever i
47、s the greater. C.2 Apparatus C.2.1 Compression testing machine capable of recording simultaneously the thickness of the specimen and the load applied to it. C.3 Procedure Record the thickness of the specimen T 1under a load of 30 N/m 2 . Apply a load evenly distributed over the surface, that is eith
48、er: a) sufficient to reduce the specimen thickness to75% of the value T 1 ; or b) a load of 40 kN/m 2 , whichever is the smaller. Leave the specimen under the load for 5 min. Remove the load and allow the specimen to recover its thickness freely for 5 min. Record the final thickness T 2under a load
49、of 30 N/m 2 . C.4 Calculation Calculate the percentage recovery after compression from the expression: T 2 T 1 - 100 4 blankBS3958-5:1986 BSI 07-1999 Publications referred to BS 476, Fire tests on building materials and structures. BS 476-11, Method for assessing the heat emission from building materials. BS 874, Methods for determining thermal insulating properties, with definitions of thermal insulating terms. BS 2972, Methods of test for inorganic thermal insulating materials. BS
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