1、BRITISH STANDARD BS 1306:1975 Incorporating Amendment No. 1 Specification for Copper and copper alloy pressure piping systems UDC 621.643.24987:669.3:621.642BS1306:1975 This British Standard, having been approved by the Pressure Vessel Industry Standards Committee, was published underthe authority o
2、f the Executive Board on 30September1975 BSI 03-1999 BS 1306-1 first published April1946 BS 1306-1 first revision December1955 BS 1306-2 first published November 1948 BS 1306-2 withdrawn as superseded by BS 2871-2:1972 BS 1306 first published September1975 The following BSI references relate to the
3、work on this standard: Committee references PVE/10, PVE/10/2 Draft for comment 73/38711 DC ISBN0 580 08514 7 Co-operating organizations The Pressure Vessel Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Governm
4、ent departments and scientific and industrial organizations: The scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Associated Offices Tech
5、nical Committee* Department of Trade Association of Consulting Engineers* Electricity Supply Industry in England and Association of Shell Boilermakers Wales* British Chemical Engineering Contractors Engineering Equipment Users Association* Association* Institution of Chemical Engineers British Gas C
6、orporation* Institution of Gas Engineers* British Insurance (Atomic Energy) Institution of Mechanical Engineers British Mechanical Engineering Lloyds Register of Shipping* Confederation Oil Companies Materials Association British Steel Industry* Process Plant Association* Chemical Industries Associa
7、tion United Kingdom Atomic Energy Authority Council of British Manufacturers of University of Manchester Institute of Petroleum Equipment* Technology and Science Department of Employment Water-tube Boilermakers Association Department of Energy Welding Institute Aluminium Federation British Valve Man
8、ufacturers Association Association of Hydraulic Equipment Copper Development Association Manufacturers Department of Trade (Marine Division) British Compressed Air Society High Pressure Pipework Consultative British Electrical and Allied Manufacturers Committee Association Ministry of Defence BNF Me
9、tals Technology Centre Amendments issued since publication Amd. No. Date of issue Comments 3124 February 1980 Indicated by a sideline in the marginBS1306:1975 BSI 03-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii Section 1. General 1 Scope 1 2 References 1 3 Definitio
10、ns 1 4 Information to be supplied by the purchaser 1 5 Materials 1 Section 2. Design requirements 6 Maximum permissible design stresses and temperatures 3 7 Thickness of straight pipes 3 8 Thickness of pipe bends 3 9 Thickness for test pressure 3 10 Joints 3 11 Branches 4 12 Expansion allowance 4 13
11、 Flexibility 4 14 Pipework supports 4 15 Drainage of steam systems 4 16 Venting 4 Section 3. Construction and workmanship 17 General 5 18 Manipulation 5 19 Heat treatment and final condition 5 20 Permanent jointing methods 6 21 Attachment of flanges and fittings 7 22 Cleanliness 7 23 Inspection and
12、testing 7 Figure 1 Modified weld preparation for bronze welding complying with the requirements of BS 1724 6 Figure 2 A method of steel flange preparation for welding to copper-nickel alloy pipes 7 Table 1 Mechanical properties and design stresses for copper and copper alloy seamless pipe and tubes
13、2 Table 2 Coefficient of linear thermal expansion (20 C to 300 C) 5 Publications referred to Inside back coverBS1306:1975 ii BSI 03-1999 Foreword This British Standard is the second revision of BS1306 and has been prepared under the authority of the Pressure Vessel Industry Standards Committee. This
14、 revised version is issued in one Part only since Part2, withdrawn in 1973, has been superseded by BS2871 “Copper and copper alloys tubes”, Part 2 “Tubes for general purposes”. To reflect current requirements the title of this revision has been changed from that of BS1306-1:1955. This standard is on
15、e of a series on pressure piping. Complementary standards are BS806 “Ferrous pipes and piping installations for and in connection with land boilers” and BS5222 “Aluminium piping systems”, Part1 “Dimensions, materials and construction of components” and Part2 “Design”. For those items in the system f
16、or which separate British Standards exist, only references to such standards are given in this revision. The design stresses specified in this standard have been supplied by the BNF Metals Technology Centre, who based their recommendation on BS3274 “Tubular heat exchangers for general purposes”. A B
17、ritish 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 pages This document comprises a f
18、ront cover, an inside front cover, pages i and ii, pages1 to 8, 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.BS1306:1975 BSI 03-1999 1 Sectio
19、n 1. General 1 Scope This British Standard specifies the design, manufacture, installation and inspection of copper and copper alloy pipework subject to internal pressure for industrial and marine systems. The following systems are specifically covered: a) steam boiler, feed and hot water; b) hydrau
20、lic (water or oil); c) oil fuel (BS799); d) pneumatic and gas; e) refrigeration and cryogenic. This standard does not specifically apply to piping systems for petroleum refineries and petrochemical plants, which are covered by BS3351. NOTEUsers of this standard, when applying it to marine work, shou
21、ld note that it is essential to ensure compliance with such statutory requirements, rules and regulations of the Regulatory Bodies and classification societies concerned. Attention is also drawn to the requirements of BS MA18, BS MA51, BS MA60 and BS MA67. 2 References The titles of the British Stan
22、dards referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 design pressure the value of pressure to be used for the calculation of pipe thickness. It is to be not less than the highest set press
23、ure of any safety valve or protective device 3.2 design temperature the design temperature to be considered for determining the design stress inTable 1 is, in general, the maximum temperature of the medium inside the pipe 3.3 test pressure the pressure to which the system and its components are subj
24、ected under test conditions (seeclause23) 4 Information to be supplied by the purchaser The purchaser of the system shall state the following in all enquiries and orders: a) the system requirements and environment, including the design pressures and temperatures, and service conditions for all pipes
25、 and equipment which are to comply with the requirements of this standard; b) the name of the Inspecting Authority, if any; c) any special statutory or other regulations with which the pipes or piping installations are required to comply; d) method of pipe joining; e) whether or not the purchaser or
26、 his representative desires to witness the tests; f) whether test certificates are required; g) whether the required material has to be suitable for hot bending (see clause18); h) cleanliness requirements of the installed system (see clause22). 5 Materials Materials shall normally be copper or coppe
27、r alloy and shall comply with one of the following standards except as otherwise agreed between manufacturer and purchaser. a) Tubes. Materials shall be selected from Table 1 of this British Standard. b) Flanges. Materials shall comply with the requirements of BS4504-2. c) Castings. Materials shall
28、comply with the requirements of BS1400 or of Table 1 in BSMA18:1974. d) Fittings. Materials for fittings shall comply with the requirements of BS66 provision shall be made for minus tolerances. Where the conditions of service are such that corrosion, erosion or mechanical damage to the surface of th
29、e tubes may occur, an appropriate thickness allowance shall be added to the thickness derived from equation 1. Alternatively the thickness allowance shall be in accordance with the requirements of the Regulatory Bodies. 8 Thickness of pipe bends 8.1 The minimum thickness of bent seamless copper and
30、copper alloy pipes shall be determined as follows. where b is the bending allowance (mm) The value of allowance b is such that the calculated stress in the bend, due to internal pressure only, does not exceed the allowable stress given inTable 1. 8.2 Where the bending allowance is not determined by
31、the procedure in8.1, the allowance is to be not less than the value derived from the following equation. where d is the outside diameter of the tube (mm) r ( 3d normally) is the radius of curvature of the bend measured to the centre line of the pipe (mm) 9 Thickness for test pressure If the pipes ar
32、e to be tested to pressures greater than the working pressure, e.g.1.5 times the working pressure, then the conditions given in clause23 shall apply. 10 Joints 10.1 General. The type of joint used shall be suitable for the pipe materials, pressure and temperature conditions, the medium handled and t
33、he mechanical strength required under service conditions. Pipes may be joined by welding, brazing, soldering or mechanical means, as agreed between the purchaser and the manufacturer. (1) 1) 1 bar = 10 5N/m 2= 100 kPa. t b= t + b (2) (3)BS1306:1975 4 BSI 03-1999 10.2 Pipe joints. Pipe joints shall b
34、e as specified in the following list. a) Unless otherwise specified by the purchaser, flanges shall comply with the requirements of BS4504-2. b) Fittings shall comply with the requirements of clause5 d) and shall meet the design requirements of the system. Where pipe connector threads are used for t
35、he attachment of fittings or flanges, the threads shall comply with the requirements of BS21, BS61 or BS2779, as appropriate. NOTEOther fittings, subject to agreement by the purchaser, may be selected by the manufacturer to meet the requirements of10.2 c) or clause11. c) Proprietary types of fitting
36、s may be used for the assembly of smaller sizes of copper pipe of a diameter up to and including 57mm. These fittings can be either capillary or compression types with socket diameter tolerances complying with the requirements of BS864-2 and BS 2051; the capillary may be either integral solder ring
37、type or end feed type. The manufacturers recommendations for the procedures to be adopted for cleaning, fluxing and heating should be adhered to for the production of sound joints. d) Compression fittings may be either the non-manipulative type, in which a ring is compressed onto the outside surface
38、 of the tube in the joint, or the manipulative type, which requires the end of the tube to be flared. When brass tube ends are flared for use with these joints; they should be stress relieved after flaring. Because of the danger of stress corrosion cracking, non-manipulative types shall not be used
39、with brass pipes. Where non-manipulative type fittings are to be used with soft temper tubes, reference should be made to the manufacturer to ensure that the make of the fittings is suitable for the application. Manipulative fittings are not suitable for use with hard temper tubes. 11 Branches These
40、 may take the form of castings, forgings, extrusions or fabrications. Designs leading to a more streamlined flow into the branch will reduce turbulence and thus decrease the risk of corrosion by impingement attack. Swept or angled branches are therefore preferred to the right angled type. For branch
41、es of 57mm diameter or less, proprietary types of tee-piece fitting may be used. NOTEReinforcement of the branches may be necessary, particularly for pipes of large diameter. The requirement for the means of reinforcement should be agreed between manufacturer and purchaser. 12 Expansion allowance Th
42、e allowance for expansion of copper and various copper alloys shall be based onTable 2. 13 Flexibility 13.1 Piping systems are to be designed with adequate flexibility so that expansion of the piping and equipment together with vibration will not result in overstressing of the system or leakage at j
43、oints. 13.2 Flexibility can be provided where practicable by the use of plain piping bent to a suitable radius. 13.3 Alternatively, or where space limitations prevail, flexible pipes, flexible joints or bellows expansion pieces may be used. These are essential for connection to resiliently mounted e
44、quipment. They shall be installed in an undistorted condition. 13.4 The pressure of fluid in a piping system can result in distortion, particularly of bends, branches and flexible units, if adequate anchorage is not provided. 13.5 Pipework adjoining flexible units shall be supported as closely as po
45、ssible to the flexible unit. The support shall be designed to prevent the pressure loads transmitted by the flexible unit which distort the attached pipework and equipment. 14 Pipework supports The design of supports shall be capable of adequately supporting the piping system without undue distortio
46、n. In addition to supporting gravitational loads, the supports shall provide for concentrated loads imposed by valves and risers and for axial loadings due to expansion and the pressure of fluid. 15 Drainage of steam systems Provision shall be made for the removal of water (whether formed continuous
47、ly or only occasionally) from the system. In addition, provision shall also be made for complete drainage of the working fluid. 16 Venting Provision shall be made for the installation of either manual or automatic types of vents at the high point(s) of the system for clearance of the pipeline and equipment. Where such devices are of an automatic type they shall clear the system without loss of the process or service fluid carried.
