1、BRITISH STANDARD CONFIRMED AUGUST 1991 BS 3248:1986 Specification for Sparkguards for use with solid fuel appliances UDC 645.494.3:697.243BS3248:1986 This British Standard, having been prepared under the directionof the Furniture and Household Equipment Standards Committee, was published under the a
2、uthority of the Board of BSI and comes into effect on 31March1986 BSI 08-1999 First published July 1960 First revision March 1986 The following BSI references relate to the work on this standard: Committee reference FHM/24 Draft for comment 85/37678 DC ISBN 0 580 15053 4 Committees responsible for t
3、his British Standard The preparation of this British Standard was entrusted by the Furniture and Household Equipment Standards Committee (FHM/-) to Technical Committee FHM/24 upon which the following bodies were represented: Association of British Solid Fuel Appliances Manufacturers Association of M
4、anufacturers of Domestic Electrical Appliances Association of Metropolitan Authorities British Foundry Association British Gas Corporation British Hardware and Housewares Manufacturers Association Chief and Assistant Chief Fire Officers Association Consumer Standards Advisory Committee of BSI Corpor
5、ation of London Department of Trade and Industry (Consumer Safety Unit, C S Division) Domestic Coal Consumers Council Domestic Solid Fuel Appliances Approval Scheme Fire Protection Association Greater London Council Metal Trades Organizations National Coal Board National Fireplace Council Manufactur
6、ers Association Oil Appliances Manufacturers Association Royal Society for the Prevention of Accidents Society of British Gas Industries Wire Goods Manufacturers Association Womens Solid Fuel Council Amendments issued since publication Amd. No. Date of issue CommentsBS3248:1986 BSI 08-1999 i Content
7、s Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Design and construction 1 3 Performance 2 4 Marking and labelling 2 Appendix A Front surface strength test 3 Figure 1 Features of a typical sparkguard 1 Figure 2 Arrangement for front surface strength test 3 Publications referr
8、ed to Inside back coverBS3248:1986 ii BSI 08-1999 Foreword This revision of BS 3248 has been prepared under the direction of the Furniture and Household Equipment Standards Committee. It supersedes BS3248:1960 which is withdrawn. This revision provides more objective requirements, related to current
9、 designs and manufacturing methods, than the previous edition and is now completely metric. The purpose of a sparkguard is to reduce the probability of sparks from exposed burning fuel igniting nearby combustible material. A sparkguard would normally be used when a room is unoccupied with the fire a
10、light and should not be expected to protect people from falling into the fire, for which purpose a fireguard complying with BS 6539 is necessary. A sparkguard complying with the requirements of this standard may be fitted within a fireguard complying with BS6539 to provide all round protection. A sp
11、arkguard should be selected to cover the fireplace opening, and those of the minimum dimensions specified in this standard are considered suitable for fireplace openings of up to470mm in width; for a wider opening a correspondingly larger sparkguard is necessary. Attention is drawn to the Children a
12、nd Young Persons Act 1933 (23 Geo. 5) (Ch12) Section 11 and the Children and Young Persons (Amendment) Act1952(15 + 16 Geo. 6 + 1 Eliz. 2 Ch 50) Section 8. The provisions of these Acts cover the exposure of children under twelve to the risk of burning by an unguarded fire-grate or heating appliance.
13、 A sparkguard is not considered a suitable guard for the purpose of these Acts. NOTEFor Scotland, the Children and Young Persons (Scotland) Act 1937 declares the age to be under seven. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standar
14、ds 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, pagesi andii, pages1 to4, an inside back cover and a back cover. This standar
15、d 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.BS3248:1986 BSI 08-1999 1 1 Scope This British Standard specifies requirements for the design, construction, performance, marking and labelling of
16、 free-standing mesh sparkguards intended for use with solid mineral fuel and wood-burning appliances inset within a fireplace surround and hearth in which the top surface of the hearth is level with the bottom of the fire opening. Sparkguards with the minimum dimensions specified in this standard ar
17、e suitable for fireplace openings up to470mm wide. Requirements for stable location are specified but no requirement for the fixing of a sparkguard is considered necessary. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Design and construction
18、NOTETypical features of a sparkguard as referred to in this clause are illustrated by Figure 1. 2.1 The sparkguard shall be of metal construction and free from sharp points and edges. The metal(s) used shall not have a melting point of less than750 C. 2.2 The mesh section of the sparkguard shall not
19、 cause obscuration greater than 40%, calculated from the area of the material of the mesh projected onto a parallel plane as compared with the total projected area of the mesh. The maximum area of any aperture shall not exceed10mm 2with individual wires not less than0.5mm in diameter. Foldable spark
20、guards shall have no openings, at the junction of panels, exceeding 3.5 mm in their shortest dimension. NOTEThis figure is intended to be illustrative of a typical sparkguard but does not otherwise form part of the standard. Figure 1 Features of a typical sparkguardBS3248:1986 2 BSI 08-1999 2.3 The
21、sparkguard shall be capable of completely covering a rectangular fireplace opening 470mm wide and 560mm high. The depth of the sparkguard shall not be less than100mm at the point of maximum depth of the base. 2.4 The sparkguard shall be provided with a means for removal or adjustment with respect to
22、 a lighted fire such that this can be carried out without the need for the hand to come into contact with any surface heated directly by radiation. NOTEAn example of a suitable means is a ring situated on the upper front surface of the sparkguard capable of being securely grasped by tongs. 3 Perform
23、ance 3.1 Finish 3.1.1 Heat resistance of finish. The sparkguard shall have a hard and stable finish, capable of withstanding4h at 180 C when tested in accordance with the preferred method of clause 6 of BS 3900-G7:1976. Immediately following the test period the finish shall show no signs of discolor
24、ation, flaking or melting. It shall not be possible to remove or damage any part of the finish by vigorous rubbing with a hand-held cloth or by swift removal of an applied self-adhesive tape. The tape 1)used shall have a specific adhesion to stainless steel of 750 100 g/cm when removed at180 and at
25、approximately 1 m/s. 3.1.2 Flame resistance of finish. There shall be no spread of flame exceeding an area of1000mm 2when any part of the sparkguard is suspended horizontally for 5s at a height of60mm above a spirit burner complying with the constructional requirements of section 2 of BS 5865:1980 a
26、nd operated as described in section 3 of BS5865:1980. 3.2 Strength 3.2.1 Rigidity. The centre of the front surface of the sparkguard shall be capable of supporting a force of50 N for 1min and shall not suffer a permanent deformation of more than 10mm when tested in accordance with the method given i
27、n Appendix A. Following the test of Appendix A, all joints of the frame shall be intact and there shall have been no movement of the mesh, with respect to the frame, visible to the unaided eye. 3.2.2 Strength of joints. All joints, including the hinges of foldable sparkguards and the securing of the
28、 mesh to the frame and of the removal/adjustment means to the guard, shall be capable of withstanding a direct pull of100 N. Clips joining panels of foldable sparkguards shall not unfasten when subjected to a direct pull of 25 N. 3.3 Stability The sparkguard shall return spontaneously to the normal
29、upright position following being tilted back and then released on a level surface, in any direction away from the fire opening in normal use, until the base makes an angle of15 with the horizontal. 4 Marking and labelling 4.1 Marking Each sparkguard shall be permanently and legibly marked with the f
30、ollowing: a) the name or identification mark of the responsible UK manufacturer, distributor or vendor; b) the number of this British Standard, i.e.BS3248:1986 2) . 4.2 Labelling The sparkguard shall have affixed to it a label or swing ticket giving the following information: a) identification of th
31、e product as a sparkguard intended for use when the room is unoccupied; b) that a sparkguard does not give adequate protection to children and the infirm against falling into the fire, or burning by contact with the sparkguard, for which purposes a fireguard complying with BS 6539 is necessary; c) t
32、he maximum size of fireplace opening and the maximum forward projection of the fire front for which the sparkguard is suitable, with a recommendation that, to be effective, a sparkguard should make continuous contact with the fire surround when in position. 1) A suitable self-adhesive tape is transp
33、arent tape 681 available from BLMRA, Leather Trades House, Northampton. 2) Marking BS 3248:1986 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 manufacturers
34、 responsibility. Enquiries as to the availability of third party certification should be addressed to the appropriate certification body.BS3248:1986 BSI 08-1999 3 Appendix A Front surface strength test A.1 Place the sparkguard with the rear edges of the sides resting on a flat, horizontal surface so
35、 that the front surface is uppermost and horizontal, as in Figure 2. A.2 Measure and record the vertical distance h (inmm), from the supporting surface to the centre of the largest unsupported area of the guard (point A in Figure 2). NOTEA is the centre point of the height and the width of the plan
36、view of the assembled sparkguard. Figure 2 Arrangement for front surface strength testBS3248:1986 4 BSI 08-1999 A.3 Apply, without impact, a force of 50 N distributed over a flexible base1505mm 1505mm, centred at A, and maintain for 1 min. NOTEA flexible sandbag of appropriate dimensions and total m
37、ass5.1 0.1 kg is a suitable means of applying this force. A.4 Remove the force, measure and record the new value of h. A.5 Express the difference between the two recorded measurements as the permanent deformation in millimetres.BS3248:1986 BSI 08-1999 Publications referred to BS 3900, Methods of tes
38、t for paints. BS 3900-G7, Determination of the effect of heat. BS 5865, Specification for construction and operation of spirit burner for small-scale laboratory flame tests. BS 6539, Specification for fireguards for use with solid fuel appliances. BS 3248:1986 BSI 389 Chiswick High Road London W4 4A
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