1、BRITISH STANDARD BS 2502:1979 Specification for Manufacture of sectional cold rooms (walk-in type) UDC 725.355:699.865:621.565BS2502:1979 This British Standard, having been prepared under the directionof the Refrigeration, Heating and Air Conditioning Standards Committee was published under the auth
2、ority ofthe Executive Board on 31December 1979 BSI 09-1999 First published August 1954 First revision December 1979 The following BSI references relate to the work on this standard: Committee reference RHE/19 Draft for comment 77/77418 DC ISBN 0 580 11081 8 Cooperating organizations The Refrigeratio
3、n, Heating and Air Conditioning Standards Committee, under whose direction this British Standard was prepared consists of representatives from the following Government departments and professional and industrial organizations: Association of Manufacturers of Domestic Electrical Appliances Associatio
4、n of Consulting Engineers Boiler and Radiator Manufacturers Association Limited British Combustion Equipment Manufacturers Association British Gas Corporation British Refrigeration and Air Conditioning Association* Building Services Research and Information Association Chartered Institution of Build
5、ing Services Department of Energy (Energy Technology) Department of Health and Social Security* Department of the Environment (PSA) Engineering Equipment Users Association Electricity Supply Industry in England and Wales* Heating and Ventilating Contractors Association Hevac Association Institute of
6、 Fuel Institute of Refrigeration* Institution of Gas Engineers Lloyds Register of Shipping Manufacturers Association of Radiators and Convectors Ltd. Ministry of Defence* National Coal Board Society of British Gas Industries Water Tube Boilermakers Association The organizations marked with an asteri
7、sk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Agricultural Research Council Co-operative Union Environmental Health Officers Association Ice Cream Federation Limited Institution of Grocery Distri
8、bution London Refrigeration Society Royal College of Pathologists United Kingdom Association of Frozen Food Producers Amendments issued since publication Amd. No. Date of issue CommentsBS2502:1979 BSI 09-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 Refere
9、nces 1 3 Definition 1 4 Test room climate class 1 5 Marking 1 6 Information 1 7 Cold room volume 1 8 Materials 1 9 Construction 2 10 Interior and exterior finishes 3 11 Internal fittings 3 12 Temperature indicator 3 13 Electrical equipment 3 Table 1 Test room climate classes 1 Table 2 Floor loads fo
10、r cold storage 2 Publications referred to Inside back coverBS2502:1979 ii BSI 09-1999 Foreword This British Standard was first published in 1954 under the title “Manufacture and testing of sectional cold rooms (walk-in type)” and was prepared at the request of the Refrigeration Equipment sub-committ
11、ee of the Joint Equipment Standardization Committee of the Ministry of Defence. Amendments PD 1991 October 1954 and PD 4268 August 1961 were issued. The scope of the first edition was limited to sectional cold rooms within the range of 2.8 m 3to 41.5 m 3(100 ft 3to 1 500 ft 3 ) gross volume capacity
12、. Since 1954, sectional cold rooms having considerably larger capacities have been manufactured and no limitation on capacity has therefore been incorporated in this first revision. The first edition dealt with the manufacture and testing of the cold room and the associated refrigerating plant. This
13、 first revision is a specification for the cold room itself and not for the associated refrigerating plant. Attention is drawn to the need for complying with legal requirements applying to the use and construction, etc., of sectional cold rooms. These requirements, for example, include those issued
14、as regulations etc. under the Food and Drugs Act 1955 (or the Food and Drugs (Scotland) Act 1956) such as the UnitedKingdom Food Hygiene (General) Regulations 1970, The Poultry Meat (Hygiene) Regulations 1976. A British Standard does not purport to include all the necessary provisions of a contract.
15、 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, pages1 to 4, an inside back cover an
16、d 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 the inside front cover.BS2502:1979 BSI 09-1999 1 1 Scope This British Standard specifies the minimum construction requirements for, and the m
17、ethod of computing volumes of, sectional cold rooms intended for commercial use. This standard applies to sectional cold rooms located within a building in climates having dry bulb temperatures and relative humidities between 16 C with 80% r.h. and 40 C with 40% r.h. (see Table 1). The limits of int
18、ernal air temperature are 30 C and + 10 C. This standard is a specification for the cold room itself and not for the associated refrigerating plant. 2 References The titles of the publications referred to in this standard are listed on the inside back cover. 3 Definition For the purposes of this Bri
19、tish Standard the definitions in BS 5643 together with the following apply. 3.1 test room climate class a test room climate classified according to dry bulb temperature and relative humidity as in Table 1 4 Test room climate class Test room climate classes shall be as shown in Table 1. Table 1 Test
20、room climate classes 5 Marking The following information shall be given on a plate attached to the cold room in a location where the information is readily accessible and easily visible. a) The name and address of the manufacturer or sponsor of the completely assembled unit. b) Type, model, catalogu
21、e and serial numbers. c) Full particulars of the door heater, i.e. voltage, frequency, etc., if fitted. d) The number of this British Standard, i.e. BS 2502. NOTEThe addition of the mark BS 2502 on or in relation to the cold room is a claim by the manufacturer that it complies with the requirements
22、of this standard. 6 Information 6.1 The manufacturer shall supply to the installer instructions on the method of assembly. 6.2 The following information shall be provided to the user by the person, firm or company responsible for the supply of the cold room. a) Instructions on the use, cleaning and
23、maintenance of the cold room. b) The claimed gross internal volume (in m 3 ) of the cold room (see clause 7). 7 Cold room volume The gross internal volume of the cold room shall be the product of the inside depth, the inside width and the inside height less the volume of any internal items or obstru
24、ctions not forming part of the refrigerating system. The gross internal volume shall be expressed in cubic metres and shall be not less than 99% of the claimed gross internal volume see 6.2 b). NOTEWhere the cold room is divided into several compartments by fixed partitions, each compartment is rega
25、rded as a separate room for the purpose of determining volumes. Where necessary, the total volume can be divided into convenient units and volumes of geometric shape that can be easily measured. The sum of the volumes of all units is the total gross internal volume of the cold room. 8 Materials 8.1
26、The materials used for the construction of the cold room shall comply with the requirements of British Standards, where applicable, except where such requirements are modified by this BritishStandard. 8.2 Materials shall be free from defects that are liable to cause undue deterioration or failure. 8
27、.3 Under normal conditions of use, materials shall not shrink, warp or expand to an undue degree. 8.4 Materials shall be resistant to attack by indigenous insects, pests and vermin. 8.5 Where liable to be exposed to moisture, food products or chemically-active substances, the materials shall be suit
28、ably resistant and shall not contaminate stored products. 8.6 Sealing materials used shall not lose any of their essential properties such as adhesion, plasticity, moisture resistance, etc. Test room climate class Dry bulb temperature Relative humidity C % 1 16 80 2 22 65 3 25 60 4 30 55 5 40 40 NOT
29、EThis table is included in ISO 1992-11:1973.BS2502:1979 2 BSI 09-1999 9 Construction 9.1 General 9.1.1 The cold room parts shall be constructed to give adequate strength and rigidity to withstand normal conditions of handling, transport and use. 9.1.2 The construction of the parts shall be such that
30、 when the cold room is erected it is self-supporting and structurally adequate for sustaining all normal loadings imposed by the internal fittings, i.e. hanging rails, shelves, etc., together with the weight of products for which the fittings are intended. No permanent deflection shall occur under n
31、ormal loadings. 9.1.3 The floor, walls, ceiling and doors, etc., from which the cold room is formed shall be constructed in such a way that the outer surfaces of the assembled cold room will not sweat at the intended range of internal temperatures and the corresponding design climate classes (see Ta
32、ble 1). NOTEA design value of heat flow through the walls etc., in the range 9 W/m 2to 10 W/m 2is often appropriate. 9.1.4 All personnel access doors shall be capable of being opened (preferably outwards) from both outside and inside the cold room. At least one such door shall be provided in each co
33、ld room and multi-compartment cold rooms shall have such a personnel access door fitted to each compartment. 9.1.5 Under normal conditions of use, all parts that constitute an accident hazard shall be effectively guarded. 9.1.6 All parts that require periodic servicing shall be readily accessible. 9
34、.1.7 Crash barriers or dunnage battens of materials complying with the requirements of clause 8 shall be fitted to the walls and door entrances to prevent damage to the interior and exterior finishes. 9.2 Sections. The construction of the sections shall be capable of withstanding the forces imposed
35、by any anticipated pressure difference between the inside and outside air. 9.3 Joints 9.3.1 To prevent the movement of air or water vapour through joints, they shall be vapour sealed. The seal shall be completely non-porous to withstand cleaning procedures. 9.3.2 All joints shall be so formed as to
36、permit adequate vapour sealing to be effected during erection and yet allow removable sections to be dismantled and properly re-erected. 9.3.3 Where section is joined to section, the construction of the joint shall be such that the heat flow through it is not more than twice the value of the heat fl
37、ow through the section itself. Such joints shall be capable of withstanding the forces imposed by any anticipated pressure difference between the inside and outside air. 9.3.4 All joints and seams within the cold room shall be sealed to prevent entry and accumulation of potentially contaminating sub
38、stances. 9.4 Thermal insulation material 9.4.1 Means shall be taken to prevent moisture entering the thermal insulation material. 9.4.2 When the interior and exterior surfaces of the cold room are of high thermal conductivity materials, they shall be separated by insulated breaker strips or their eq
39、uivalent. 9.5 Floors. The cold room manufacturer may or may not be asked to supply insulated sectional flooring, according to the type of cold room and the use intended. In cases where sectional flooring is supplied as part of the cold room construction, the insulated sections and their finish shall
40、 be capable of withstanding the loads specified in Table 2. NOTEFor cold rooms intended to operate with internal temperatures colder than 0 C, consideration should be given to employing a suitable method of preventing frost heave. Table 2 Floor loads for cold storage NOTETable 2 has been extracted f
41、rom CP 3:Chapter V-1, Table 1, item “Cold storage”. 9.6 Doors 9.6.1 Doors shall be constructed from materials complying with the requirements of clause 8 and shall be capable of providing the insulation requirements specified in 9.1.3, 9.3 and 9.4. 9.6.2 A seal to prevent any significant leakage of
42、air into or from the cold room shall be provided. Intensity of distributedload Concentrated load to be applied over any square with a 300 mm side 5.0 kN/m 2for each metre of storage height, with a minimum of 15.0 kN/m 2 Concentrated load to be determined, but not less than 9.0 kNBS2502:1979 BSI 09-1
43、999 3 9.6.3 All cold rooms designed for internal temperatures colder than 0 C shall be fitted with heaters to the door or to the door frame, or both, and to the threshold, if applicable, to prevent condensation and subsequent formation of ice. 9.6.4 The action of door fasteners, locks and hinges sha
44、ll be smooth and positive. NOTEThere is, often, considerable benefit to be obtained by using inner doors, air curtains or an air lock because a major part of the work done by the refrigerating equipment operating the cold room is to deal with the heat gains resulting from operating the cold room doo
45、r. 9.7 Windows 9.7.1 Windows (including those fitted in doors) shall be appropriately multi-glazed according to the anticipated operating conditions. Heated glass (or equivalent transparent material) shall be provided as may be required by the anticipated operating conditions. 9.7.2 The window frame
46、s shall have a thermal break between the inside and outside of the cold room. 9.8 Pressure relief devices. The manufacturer shall provide a pressure relief device that shall be capable of relieving pressure differences between the inside and outside air. 10 Interior and exterior finishes 10.1 Interi
47、or and exterior finishes shall be durable and capable of being cleaned effectively and hygienically. 10.2 Finishes shall not crack, chip, flake, rub off or soften under conditions of normal service and cleaning. 10.3 All metal parts and fixings used inside or on the outside of the cold room, where t
48、hey are liable to be exposed to moisture, shall be corrosion resistant or adequately protected against corrosion. 10.4 Where organic finishes are employed, they shall be corrosion resistant. 10.5 Electroplated coatings on metal parts shall be in accordance with BS 1224. Nickel coatings shall be medi
49、um application grade, in accordance with BS 1224. Nickel or chromium coatings shall be to service condition no. 2, in accordance with BS 1224. Cadmium plating shall not be used on any part inside the cold room. 11 Internal fittings 11.1 All fittings within the cold room shall be removable for ease of cleaning. 11.2 All fittings within the cold room intended for food storage shall be resistant to corrosion and be made of metal or other durable material impervious to moisture. 11.3 All rails shall be fitted in such a way that they cannot slide or be tip
