1、BRITISH STANDARD BS 5041-3: 1975 Incorporating Amendment No.1 Fire hydrant systems equipment Part 3: Specification for Inlet breechings for dry riser inlets UDC 614.842.62:621.643.4.064BS5041-3:1975 This British Standard, having been approved by the Fire Standards Committee, was published under the
2、authority ofthe Executive Board on 29August 1975 BSI 03-1999 The following BSI references relate to the work on this standard: Committee reference FSM/6 Draft for comment 72/12171 DC ISBN 0 580 08844 8 Co-operating organizations The Fire Standards Committee, under whose supervision this British Stan
3、dard was prepared, consists of representatives from the following Government departments, and scientific and industrial organizations: Association of County Councils Association of Metropolitan Authorities* British Constructional Steelwork Association British Fire Protection Systems Association Chie
4、f and Assistant Fire Officers Association Concrete Society Confederation of British Industry Department of the Environment* Department of the Environment and Fire Offices Committee Joint Fire Research Organization* Department of Trade* Fire Extinguishing Trades Association* Fire Offices Committee* F
5、ire Protection Association Greater London Council Greater London Council (London Fire Brigade)* Health and Safety Executive, HM Factory Inspectorate Home Office* Industrial Fire Protection Association of Great Britain Institute of Heating and Ventilation Engineers Institution of Civil Engineers Inst
6、itution of Fire Engineers* Institution of Municipal Engineers Ministry of Defence* National Council of Building Material Producers Royal Institute of British Architects The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the
7、 following, were directly represented on the committee entrusted with the preparation of this British Standard. Aluminium Federation British Fire Services Association British Plastics Federation British Valve Manufacturers Association Copper Development Association Light Metal Founders Association N
8、ational Coal Board Representatives of manufacturers of equipment and components Amendments issued since publication Amd. No. Date of issue Comments 5504 March 1987 Indicated by a sideline in the marginBS5041-3:1975 BSI 03-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii
9、 Section 1. General 1 Scope 1 2 References 1 3 Definitions 1 4 Overall requirements 1 5 Marking 1 Section 2. Design and manufacture 6 Breeching body 1 7 Inlet connections 1 8 Drain valves 2 Section 3. Special attachments 9 Blank caps 2 Section 4. Materials 10 Choice for components 2 Section 5. Tests
10、 11 Test requirements 2 12 Test certificate 3 Table 1 Choice of materials for components 3 Publications referred to 4BS5041-3:1975 ii BSI 03-1999 Foreword This Part of this British Standard specifies requirements for 2-way and4-way inlet breechings for use with dry risers (see definition3.1). It app
11、lies to fittings provided to enable the fire brigade to make multiple connections with fire hoses to charge these dry risers. It is published as part of a general standard specification for fire hydrant systems equipment the other parts of which are: Part 1: Landing valves for wet risers; Part 2: La
12、nding valves for dry risers 1) ; Part 4: Boxes for landing valves for dry risers; Part 5: Boxes for foam inlets and dry riser inlets (formerly BS3980). This general standard specification has been prepared under the authority of the Fire Standards Committee to provide detailed requirements for most
13、of the special items required for wet and dry risers described in BS5306-1. As part of BSIs programme of metrication this standard is expressed in metric terms. The metric values are given in SI units; for further information reference should be made to BS3763 “The International System of units (SI)
14、”. Inches have however been retained in certain cases to describe pipes and valves by their nominal bore or thread sizes so as to accord with the descriptions retained in the latest versions of the standards for these items. Certification. Attention is drawn to the certification facilities described
15、 on page 4 of this standard. 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 not of itself confer immunity from legal obligations. Summary of p
16、ages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 4, an inside back cover and 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.
17、 1) In course of preparation.BS5041-3:1975 BSI 03-1999 1 Section 1. General 1 Scope This Part of this British Standard specifies the requirements for 2-way and 4-way inlet breechings intended for dry risers only. They are to be fitted with male instantaneous connections complying with the requiremen
18、ts of BS336, drain valves complying with the requirements of BS5154, rating PN16, and non-return valves. 2 References The titles of the British Standards referred to in this standard are listed on page 4. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 dr
19、y riser (dry rising main) a vertical pipe installed in a building for fire fighting purposes, fitted with inlet connections at fire brigade access level and outlet connections at specified points, which is normally dry but capable of being charged with water by pumping from fire service appliances 3
20、.2 breeching a unit at an inlet of a dry riser, fitted with either two or four connections leading to a common pipe. This unit is usually contained in a box as described in BS5041-5 4 Overall requirements 4.1 Basic design of breeching 4.1.1 The size of the breeching shall be such that it can readily
21、 be accommodated in boxes for dry risers conforming to the requirements of BS5041-5. To this end the maximum size of the breeching from the back face, or flange, to the extremity of the chain retaining lug on the blank cap shall be 260mm. 4.1.2 The breeching shall be designed to ensure that the wate
22、r flow within it is not subjected to undue restriction at any point. 4.2 Breeching outlets. The outlet fitted to the breeching shall be a nominal 100mm screwed outlet, a nominal 100mm flanged outlet or a nominal 150mm flanged outlet. 4.3 Pressure rating and temperature range. The breeching and its f
23、ittings shall be suitable for a normal working pressure of 10bar 2)and for a working temperature range of from 0C to 38C. 4.4 Interchangeability of parts. All valves, connections and parts of the breeching shall be interchangeable between units from any one manufacturer. 5 Marking Each breeching whi
24、ch has satisfactorily completed the test given in clause11 and which in all respects conforms to the requirements of this standard shall be marked with the number of this standard, i.e.BS5041-3. 3) Section 2. Design and manufacture 6 Breeching body 6.1 The body wall thickness at any point shall be n
25、ot less than3.5mm. 6.2 The body shall be so constructed that it will withstand the test pressure (see section 5). 6.3 The inlet connections shall be spaced at not less than115mm (4 in approx.) centres for the2-way inlet breeching, and at not less than150mm (6in approx.) centres for the4-way type. 6.
26、4 The outlet shall be as follows. a) For 2-way breeching, either a female screwed outlet with4 in threads complying with the requirements of BS21 or a 100mm flanged outlet complying with the requirements of Table 16/21 of BS4504-2:1974. b) For4-way breeching, a 150 mm flanged outlet complying with t
27、he requirements of Table16/21 of BS4504-2:1974. 6.5 The casting surrounding the bolt holes on any flange shall be cast smooth and level, or machined, or spot faced, to ensure satisfactory bolting. 7 Inlet connections 7.1 Inlet connections shall be attached to the body by screwed ends or flanges. 7.2
28、 The inlet connection for attaching the hose shall be a male instantaneous connector complying with the requirements of BS336. 7.3 Each inlet connection shall be fitted with a non-return valve of either spring loaded mushroom type, or of flap type. 2) 1 bar=10 5 N/m 2 =100kPa. 3) Marking BS5041-3 on
29、 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 responsibility. Enquiries as to the availability of third party certification should be addressed
30、 to the appropriate certification body.BS5041-3:1975 2 BSI 03-1999 7.4 When flap type non-return valves are used, the three following conditions shall be observed. a) The breeching shall be fitted so that the flap valves are top hung. b) The flap shall be prevented from opening beyond a horizontal p
31、osition or to any position where the flap can jam. c) The opening of the flap valve shall be not less than 60 of movement. 7.5 The inlet connections shall be capped with a female blank cap in accordance with the requirements of clause9. 8 Drain valves 8.1 Each breeching shall be fitted with a drain
32、valve in the form of a 1 in gate valve complying with the requirements of BS5154, rating PN16. 8.2 For ease of attaching a drain hose, the drain valve outlet shall be positioned so that it faces in the same direction as, and is at a lower level than, the inlet connections to the breeching. 8.3 The o
33、utlet of the drain valve shall have 1 in male threads complying with the requirements of BS21, and shall be fitted with a female blank cap and chain. Section 3. Special attachments 9 Blank caps Each inlet shall be provided with a female instantaneous blank cap complying with the requirements of BS33
34、6 or, if approved by the purchaser, a plastics cap or rubber cap. Every blank cap shall be attached to the breeching by a suitable lug, S hook and chain. Section 4. Materials 10 Choice for components The materials for each component of the breeching shall be chosen from the list of permitted materia
35、ls given inTable 1. Section 5. Tests 11 Test requirements 11.1 The finished breeching and valves shall be subjected to an internal pressure of 20 bar 4)in such a way as to ensure that all parts of the body and inlet connections are subjected to the full test pressure. During this test no form of ext
36、ernal restraint shall be placed upon the body, and no non-return valve, part of the body or fitting shall show any signs of leakage from the interior to the atmosphere. 11.2 The non-return valves shall also be capable of holding1.7 bar test pressure without showing any sign of leakage. 4) 1 bar = 10
37、 5N/m 2= 100 kpa.BS5041-3:1975 BSI 03-1999 3 Table 1 Choice of materials for components 12 Test certificate If the purchaser specifies a requirement for a test certificate the manufacturer shall issue one to confirm that the breeching has been tested and has satisfactorily met the requirements of cl
38、ause 11 of this standard. It shall also state the medium used in the tests. Component Permitted materials Body a) Spheroidal graphite iron to BS2789 b) Malleable iron to BS310 Inlet connections and non-return valves a) Copper alloy to BS1400 LG2 or LG4 b) Copper alloy to BS2872 CZ122 or CZ114 Valve
39、facings a) Rubber to BS1154 b) Chloroprene to BS2752 (both to minimum nominal hardness level of 70 IRHD) Blank caps for valve inlets a) Copper alloy to BS1400 LG2 or LG4 b) Copper alloy to BS2872 CZ122 or CZ114 c) Aluminium alloys to BS1490 and all anodized: type LM6 M or type LM25 TB or type LM25 F
40、 d) Suitable plastics, if approved by the purchaser e) Suitable rubber, if approved by the purchaser Drain valve a) Copper alloy to BS1400 LG2 or LG4 b) Copper alloy to BS2782 CZ121, CZ122 or CZ132 Blank caps for drain valves a) Copper alloy to BS1400 LG2 or LG4 b) Copper alloy to BS2872 CZ121 or CZ
41、114 c) Malleable iron to BS310 d) Suitable plastics, if approved by the purchaser e) Suitable rubber, if approved by the purchaserBS5041-3:1975 4 BSI 03-1999 Publications referred to This standard makes reference to the following British Standard: BS 21, Pipe threads for tubes and fittings where pre
42、ssure tight joints are made on the threads. BS 310, Blackheart malleable iron castings. BS 336, Fire hose couplings and ancillary equipment. BS 1154, Vulcanized natural rubber (high quality). BS 1400, Copper alloy ingots and copper and copper alloy castings. BS 1490, Aluminium and aluminium ingots a
43、nd castings. BS 2752, Vulcanized chloroprene rubber compounds. BS 2789, Iron castings with spheroidal or nodular graphite. BS 2872, Copper and copper alloys. Forging stock and forgings. BS 4504, Flanges and bolting for pipes, valves and fittings Metric series. BS 5041-2, Copper alloy and composite f
44、langes. BS 5041, Fire hydrant systems equipment. BS 5154-5, Boxes for foam inlets and dry risers. BS 5154, Copper alloy globe, globe stop and check, check, and gate valves for general purposes. BS 5306, Fire extinguishing installations and equipment on premises 5) . BS 5306-1, Hydrant systems, hose
45、reels and foam inlets. 5) Referred to in the foreword only.BS5041-3:1975 BSI 03-1999 BSI Certification Trade Mark The Kitemark The Kitemark is the registered certification trade mark of the British Standards Institution. A licence to use the Kitemark on or in relation to a product will be granted to
46、 any manufacturer or producer who demonstrates that he can and will be able consistently to make that product to a specified British Standard. His capability of doing so is initially assessed by inspection of his production process, quality control organization and test facilities, and by independen
47、t testing of a sample of the product against all the criteria of the relevant standard. The licensee is required to accept, and to operate in accordance with, a BSI scheme of supervision and control which identifies the tests to be carried out during manufacture and on the completed product, and spe
48、cifies the frequency of such testing. BSI carries out unannounced inspection visits to the manufacturers works and audit testing of the product, and may withdraw the licence for any failure of the manufacturer to comply with the relevant standard or with the requirements of the scheme of supervision
49、 and control. The presence of the Kitemark on or in relation to a product is an assurance that the goods have been produced under a system of supervision, control and testing, operated during manufacture and including periodical inspection of the manufacturers works in accordance with the certification mark scheme of BSI. Further particulars of the terms of licence may be obtained from the Quality Assurance Department, British Standards Institution, Maylands Avenue, Hemel Hempstead, Herts. HP2 4SQ.BSI 389 Chiswick High Road Lo
