BS 6586-1-1993 Rigid polyurethane (PUR) foam produced by the press injection method - Specification for PUR foam for insulated panels for transport containers and insulated vehicle.pdf

1、BRITISH STANDARD BS 6586-1: 1993 Rigid polyurethane (PUR) foam produced by the press injection method Part 1: Specification for PUR foam for insulated panels for transport containers and insulated vehicle bodiesBS6586-1:1993 This British Standard, having been prepared under the directionof the Plast

2、ics and Rubber Standards Policy Committee, was published underthe authority of the Standards Board and comes into effect on 15February1993 BSI 10-1999 First published July 1985 Second edition February 1993 The following BSI references relate to the work on this standard: Committee reference PRM/72 D

3、raft for comment 92/36421 DC ISBN 0 580 21366 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/72 upon which the following bodies were represented: Associ

4、ation of Building Component Manufacturers Brick Development Association British Board of Agrment British Plastics Federation British Rigid Urethane Foam Manufacturers Association Calcium Silicate Brick Association Limited Cavity Foam Bureau Chief and Assistant Chief Fire Officers Association Departm

5、ent of the Environment (Building Research Establishment) Department of the Environment (Construction Industries Directorate) Engineering Equipment and Materials Users Association Flat Roofing Contractors Advisory Board Loss Prevention Council Ministry of Defence National Cavity Insulation Associatio

6、n National Federation of Roofing Contractors National House-building Council Phenolic Foam Manufacturers Association Polyethylene Foam Insulation Association Royal Institute of British Architects The following bodies were also represented in the drafting of the standard, through subcommittees and pa

7、nels: British Ceramic Research Ltd. British Urethane Foam Contractors Association (BUFCA) Department of the Environment Department of the Environment (Property Services Agency) RAPRA Technology Ltd. Amendments issued since publication Amd. No. Date CommentsBS6586-1:1993 BSI 10-1999 i Contents Page C

8、ommittees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Designation 1 4 Composition and form 1 5 Preparation of test panels 1 6 Preparation of test specimens 1 7 Physical properties 3 8 Marking 3 Annex A (informative) Guidance for designers 4 Annex B (informative) Burning cha

9、racteristics of rigid polyurethane (PUR)foams and recommendations regarding their use 4 Annex C (informative) Guidance intended to minimize fire hazards 4 Annex D (normative) Method for the determination of apparentwaterabsorption 5 Annex E (informative) Guidance on thermal conductivity design and3d

10、ayvalues 6 Figure 1 Selection plan for test specimens 2 Table 1 Designation codes for thermal conductivity 1 Table 2 Physical property requirements 3 List of references Inside back coverBS6586-1:1993 ii BSI 10-1999 Foreword This Part of BS6586has been prepared under the direction of the Plastics and

11、 Rubber Standards Policy Committee and supersedes BS6586-1:1985which is withdrawn. Although this standard continues to be primarily for quality assurance uses with guidance included for those involved in design work in Annex A, in this revision a designation system has been introduced whereby the ma

12、nufacturer declares the thermal conductivity in a coded form. This Part also contains guidelines (in Annex B and Annex C) on burning properties and fire hazards. These guidelines are in accordance with the principles recommended in BS6336. Attention is drawn to BS4840-1which specifies requirements f

13、or rigid polyurethane (PUR) foam produced in slab form for use in transport containers and insulated vehicle bodies. For the insulation of refrigerator cabinets, cold rooms and stores, attention is drawn to BS4840-2, BS2501and BS2502. WARNING. Adequate fire precautions should be taken when repairing

14、 any structure containing polyurethane or polyisocyanurate foams. Do not use welding or flame cutting equipment or any other appliances involving naked flames or involving hot air welders. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Sta

15、ndards 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, pages1to6, an inside back cover and a back cover. This st

16、andard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS6586-1:1993 BSI 10-1999 1 1 Scope This Part of BS6586specifies requirements for the composition and physical properties of rigid polyuretha

17、ne (PUR) foam manufactured by the press injection method for use in the construction of insulated panels for transport containers and insulated vehicle bodies. This Part of BS6586is not applicable to the in situ insulation of fully constructed transport containers and insulated vehicle bodies. 2 Ref

18、erences 2.1 Normative references This Part of BS6586incorporates, 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 the inside back cover. Subsequent amendments to, or r

19、evisions of, any of these publications apply to this Part of BS6586only when incorporated in it by updating or revision. 2.2 Informative references This Part of BS6586refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of thi

20、s standard are listed on the inside back cover but reference should be made to the latest editions. 3 Designation The foam panels shall be designated according to their thermal conductivity. The designation shall comprise the following in the order presented: a) the number and date of the British St

21、andard, i.e. BS6586-1:1993; b) a double digit number to indicate the thermal conductivity selected in accordance with Table 1. Example The designation required for a foam panel with a thermal conductivity of0.020W/(mK) (see7.2) is as follows. BS 6586-1:1993/20 4 Composition and form The material sha

22、ll consist of rigid polyurethane (PUR) foam which shall have a uniform cellular structure. The foam shall be in the form of panels integrally bonded on their two major faces to sheets of metal or other material during manufacture. NOTENo requirement for odour is included as its assessment is largely

23、 subjective. However, it is recommended that the material should be supplied free from objectionable odour. Table 1 Designation codes for thermal conductivity 5 Preparation of test panels A separate panel shall be manufactured for the purpose of physical property assessment. It shall have minimum di

24、mensions of2.5 m 1.2m with the same thickness and facing materials as used for the container or insulated vehicle body. 6 Preparation of test specimens After manufacture the test panels shall be left intact, i.e. with the facing materials adhered to the foam, for a minimum of3days before preparation

25、 of test specimens. Since the foam may not be uniform across the panel, test specimens shall be selected from those areas which may provide the extremes in the range of test results, i.e. centrally and near to the edges and corners of the panel. Since at this stage in manufacture the edges of the pa

26、nel may not be protected, test specimens shall not be selected from within50mm of the edge of the panel. Thermal conductivity a (see7.2) W/(mK) Code 0.015 15 0.016 16 0.017 17 0.018 18 0.019 19 0.020 20 0.021 21 0.022 22 0.023 23 0.024 24 0.025 25 0.026 26 0.027 27 0.028 28 0.029 29 0.030 30 0.031 3

27、1 0.032 32 a CAUTION. These values are30day values for quality control purposes. For corresponding long term design values the manufacturers advice should be sought.BS6586-1:1993 2 BSI 10-1999 Figure 1 Selection plan for test specimensBS6586-1:1993 BSI 10-1999 3 Test specimens shall be taken central

28、ly from the thickness of the panel. Samples for the burning characteristics test given in BS4735:1974shall be taken from the central area only. NOTEA suitable selection plan is shown in Figure 1. 7 Physical properties 7.1 General The physical properties shall conform to the requirements given in Tab

29、le 2. 7.2 Thermal conductivity Thermal conductivity shall be determined by either method7Aor method7B of BS4370-2:1993at a mean temperature of10 C, (302days) after manufacture. Materials shall be conditioned throughout this period at (23 2) C and(50 5)%r.h. NOTEAdditional guidance is given in Annex

30、E on information concerning the thermal conductivity design values and on the values to be obtained3days after manufacture. 8 Marking The material, packaging, or invoice shall be clearly marked with at least the following information: a) the manufacturers name or trademark; b) sthe designation 1)as

31、specified in clause3. Table 2 Physical property requirements 1) Marking BS6586-1:1993on or in relation to a product represents a manufacturers declaration 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 clai

32、m is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. Physical property Test requirement Test method Min. compressive strength normal to the major plane of the panel 180 kPa Method 3 as described

33、in clause4 of BS4370-1:1988 Min. shear strength parallel to the major plane of the panel 140 kPa Method 6 as described in clause 3 of BS4370-2:1993 Dimensional stability max. mean linear change Test conditions 24 h at ( 15 2) C 24 h at (100 2) C 24 h at (70 2) C and (95 5) % r.h. 1 % 2 % 3 % Method

34、5A as described in 6.2 of BS4370-1:1988 Cut the length and width of the test specimen parallel to the major plane of the panel Max. water vapour permeability parallel to the panel thickness 4.5ng/(Pasm) Method 8as described in clause 5 of BS4370-2:1993 Carry out the test at (38 0.5) C and(88 2) % r.

35、h. on one face of the test specimen and 0 % r.h. on the other Cut the cylindrical test specimens(25 5)mm thick such that their plane faces are parallel to the major plane of the panel Max. apparent water absorption by volume 6.5 % Annex D Min. closed cell content apparent volume 85 % Method 10as des

36、cribed in clause 5 of BS4370-2:1993 Burning characteristics Extent of burning not to exceed 125 mm BS 4735:1974 1)CAUTION. The small scale laboratory test described in BS4735 is solely for assistance in monitoring consistency of production and is not for use as a means of assessing the potential fir

37、e hazard of a material in use (see Annex B and Annex C).BS6586-1:1993 4 BSI 10-1999 Annex A (informative) Guidance for designers PUR foam of minimum overall apparent density of38kg/m 3is normally found to be suitable for the applications covered by this standard. The attention of designers is drawn

38、specifically to the following points. a) PUR foam produced by the press injection method is normally manufactured in situ within its final covering facing materials. Consequently the dimensions of the panel so formed will be those of the facing materials plus the thickness between the facings as req

39、uired. These dimensions and the allowed tolerances should be agreed between the purchaser and supplier. If required a sampling control procedure may be used on the principles embodied in BS6001. b) At densities above60kg/m 3 the thermal conductivity of PUR foam will increase slightly. c) PUR foam wh

40、ich is formed in panels and covered by air impermeable facings at the point of manufacture shows little or no increase in thermal conductivity with time. d) Moisture and water vapour barriers will be needed on the surface of the PUR foam, and joints should be made water and vapour tight. e) Corrosio

41、n is possible at the interface of PUR foam and metal surfaces in the presence of water vapour. f) It is necessary to minimize the presence of voids in the surface layers of the foam. g) Some adhesives may have a possible deleterious effect, including odour. h) Requirements for freight containers are

42、 specified in BS3951. i) The fire performance of the panels for transport containers and insulated vehicle bodies is largely determined by the facings applied to the foam and the design (see Annex B); where Fire Regulations apply these usually specify given ratings for standard fire tests on specime

43、ns of the completed structure and should be considered at an early stage. Annex B (informative) Burning characteristics of rigid polyurethane (PUR) foams and recommendations regarding their use Consideration of the fire performance of the finished structure incorporating rigid polyurethane (PUR) foa

44、m is relevant to the possible hazard associated with PUR foam. This should be assessed using BS6336 which gives recommendations on how fire hazard should be considered, taking into account the design of the end product and any possible risk to which it might be exposed in use. PUR foam is an organic

45、, and hence combustible, material. Care should be taken to avoid its ignition, particularly since the burning rate of the foams, if exposed in an enclosure, can be significantly greater than that of wood. The contribution to fire growth of PUR foam is controlled by the type of finish or facing used

46、in conjunction with the foam. It is generally accepted that insulation contained behind facings of high heat capacity does not have a significant effect on the initial rate of fire growth which is primarily affected by the fire performance of the exposed surface lining. The fire performance of the c

47、omplete structure is largely dependent on the fire properties of the facings and also reliant on the facings remaining in place and maintaining their mechanical integrity. In the design of the complete structure provision for independent fixings of facing and complete encapsulation of the foam shoul

48、d also be considered. Care should be taken during installation or repair of any structure or article which contains PUR foam to avoid it coming into contact with any possible ignition sources. Annex C (informative) Guidance intended to minimize fire hazards The following practices are recommended wh

49、erever PUR foam is manufactured, stored or fabricated. a) Maintain good housekeeping standards. b) Observe stringent fire precautions, and consult the Health and Safety Executive for advice especially in respect of welding operations. Prohibition of smoking except in designated areas is advised. c) Ensure that employees are fully aware of the potential fire hazards presented by these materials. d) Maintain fire drill procedures in consultation with the Fire Authority. e) Inform the Fire Authority of materials being used.BS6586-1:1993