1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-20959-9 SANS 1849:2008Edition 1.1Any reference to SABS 1849 is deemedto be a reference to this standard(Government Notice No. 1373 of 8 No
4、vember 2002)SOUTH AFRICAN NATIONAL STANDARD Butterfly valves for general purposes Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 1849:2008 Edit
5、ion 1.1 Table of changes Change No. Date Scope Amdt 1 2008 Amended to change the designation of SABS standards to SANS standards, to update referenced standards and to insert missing footnote in the table on basic materials. Foreword This South African standard was approved by National Committee Sta
6、nSA SC 5120.12E, Water and sanitation Equipment and systems Reticulation valves, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This document was published in May 2008. This document supersedes SABS 1849:2001 (edition 1). A vertical line
7、 in the margin shows where the text has been technically modified by amendment No. 1. This document is based on the use of flanges on the valve or pipework complying with the requirements of SANS 1123, Pipe flanges. However, flanges of ANSI class 125 or class 150, that comply with the requirements o
8、f BS EN 1759-1, Flanges and their joints Circular flanges for pipes, values, fittings and accessories, class designated Part 1 : Steel flanges NPS to 24 . or BS 3293, Carbon steel pipe flanges (over 24 inches nominal size) for the petroleum industry, can also be used if so agreed. The range of body
9、materials has been extended to include spheroidal graphite, cast iron and steel and higher pressure ratings are included. Annex A forms an integral part of this document. Annex B is for information only. SANS 1849:2008 Edition 1.1 1 Contents Page Foreword 1 Scope 3 2 Normative references 3 3 Definit
10、ions . 4 4 Requirements 5 5 Inspection and methods of test. 16 6 Marking . 18 7 Preparation for storage and transportation. 19 8 Manufacturers certificate 20 Annex A (normative) Notes to purchasers 21 Annex B (informative) Quality verification of butterfly valves for general purposes 22 Bibliography
11、. 22 SANS 1849:2008 Edition 1.1 2 This page is intentionally left blank SANS 1849:2008 Edition 1.1 3 Butterfly valves for general purposes 1 Scope This standard specifies requirements for size, rating, design, materials, marking and preparation for transport and storage of double flanged and wafer t
12、ype butterfly valves with nominal pressure up to PN 40 and up to class 300, in the nominal size (DN) range of DN 40 to DN 2000. It also specifies test requirements for pressure testing, fire-tested designs and anti-static designs, and gives methods for pressure testing. NOTE This standard does not c
13、over the installation of butterfly valves. Strict compliance with the instructions of the manufacturer is, however, necessary during installation. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. All stan
14、dards are subject to revision and, since any reference to a standard is deemed to be a reference to the latest edition of that standard, parties to agreements based on this standard are encouraged to take steps to ensure the use of the most recent editions of the standards indicated below. Informati
15、on on currently valid national and international standards can be obtained from Standards South Africa. BS 907-1, Specification for wrought steels for mechanical and allied engineering purposes B Part 1: General inspection and testing procedures and specific requirements for carbon, carbon manganese
16、, alloy and stainless steels. Amdt 1 BS 1560-3.1, Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges. Specification for steel flanges. Amdt 1 BS 1560-3.2, Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron a
17、nd copper alloy flanges. Specification for cast iron flanges. Amdt 1 BS 1560-3.3, Circular flanges for pipes, valves and fittings (Class designated). Steel, cast iron and copper alloy flanges. Specification for cast iron flanges. Amdt BS 2633, Specification for Class 1 arc welding of ferritic steel
18、pipework for carrying fluids. BS 3076, Specification for nickel and nickel allows Bar. BS 3468, Specification for austenitic cast iron. Amdt 1 BS 4677, Specification for arc welding of austenitic stainless steel pipework for carrying fluids. SANS 1849:2008 Edition 1.1 4 BS EN 1561, Founding Grey cas
19、t irons. BS EN 1563, Founding Spheroidal graphite cast iron. Amdt 1 BS EN 1759-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, class-designated Part 1: Steel flanges, NPS to 24. Amdt 1 BS EN 1759-3, Flanges and their joints Circular flanges for pipes, valves
20、, fittings and accessories, class designated Copper alloy flanges. Amdt 1 BS EN 1982, Copper and copper alloy Ingots and castings. BS EN 10029, Specification for tolerances on dimensions, shape and mass for hot rolled steel plates 3 mm thick or above. BS EN 10083-1, Steels for quenching and temperin
21、g General technical delivery conditions. Amdt 1 BS EN 10090, Valve steels and alloys for internal combustion engines. BS EN 10213, Steel castings for pressure purposes. BS EN 10222, Specification for steel forgings for pressure purposes. BS EN 12163, Copper and copper alloy Rod for general purposes.
22、 Amdt 1 BS EN 12165, Specification for copper and copper alloys Wrought and unwrought forging stock. Amdt 1 BS EN 12166, Specification for copper and copper alloys Wire for general purposes. Amdt 1 BS EN 12420, Copper and copper alloys Forgings. BS EN 13835, Founding Austenitic cast irons. Amdt 1 IS
23、O 5211, Industrial valves Part-turn actuator attachment. Amdt 1 SANS 200 (SABS 200), Copper alloy ingots and castings. SANS 936 (SABS 936), Spheroidal graphite iron castings. SANS 1034 (SABS 1034), Grey iron castings. SANS 1123, Pipe flanges. SANS 10044-1, Welding Part 1: Glossary of terms. Amdt 1 3
24、 Definitions For the purposes of this standard, the following definitions apply: 3.1 agreed agreed on in writing between the manufacturer and the purchaser SANS 1849:2008 Edition 1.1 5 3.2 face-to-face dimensions distance between the two planes perpendicular to the body bore axis located at the extr
25、emities of the body end ports. Where a liner extends over the end faces and acts as a gasket, the face-to-face dimension is inclusive of the double thickness of the liner (i.e. the thickness over each face) when in the installed (i.e. compressed) condition 3.3 double flanged valve having flanged end
26、s for connection to pipe flanges by individual bolting 3.4 wafer valve primarily intended for clamping between pipe flanges using through bolting NOTE Some types of wafer valves may be suitable for individual bolting (see clause 4). 3.5 nominal pressure (PN) numerical designation representing the wo
27、rking pressure of the valve and which is a convenient round number for reference purposes. All equipment of the same nominal size (DN) designated by the same PN number shall have compatible mating dimensions NOTE 1 The maximum allowable working pressure depends upon materials, design and working tem
28、peratures and should be selected from the “pressure/temperature rating“ tables in the appropriate standards. NOTE 2 Nominal pressure is designated by the letter PN followed by the appropriate reference number. 3.6 nominal size (DN) numerical designation of size which is common to all components in a
29、 piping system other than components designated by outside diameters or by thread size. It is a convenient round number for reference purposes and is only loosely related to manufacturing dimensions 3.7 tight shut-off valve valve having no visible leakage past the disk in the closed position 3.8 low
30、-leakage-rate valve valve which has a specified maximum leakage rate past the disk in the closed position 3.9 regulating valve valve intended for regulating purposes, and which may have a clearance between the disk and the body in the closed position 4 Requirements 4.1 Types Valves shall be one of t
31、he following types, as specified (see A.1(a) and with metal or resilient seatings or linings: a) double flanged type (see figure 1); SANS 1849:2008 Edition 1.1 6 b) wafer type: 1) single flange (see figure 2); 2) flangeless (see figure 3); 3) U-section (see figure 4); or c) other types of valves, sh
32、ouldered, socketed, etc., whose end connections (double spigotted) shall be as agreed on (see A.2(a). Figure 1 Butterfly valve: double flanged type Figure 2 Butterfly valve: single flange wafer type NOTE If this type of valve is supplied with threaded holes it may be suitable for terminal connection
33、s. SANS 1849:2008 Edition 1.1 7 Figure 3 Butterfly valve: flangeless wafer type NOTE If this type of valve is supplied with threaded lugs, it may be suitable for terminal connections. Figure 4 Butterfly valve: U-section wafer type NOTE 1 This type of valve may be suitable for the individual bolting
34、of each flange to the pipework, but this cannot be assumed. NOTE 2 This type of valve may be suitable for terminal connections. 4.2 Nominal size range The nominal sizes (DN) for PN designated valves and the nominal pipe sizes for class designated valves shall be as given in table 1 and shall be as s
35、pecified (see annex A.1(b). 4.3 Nominal pressure and class designations 4.3.1 General The pressure designation required for a valve shall be as specified by the purchaser in accordance with annex A.1(c). 4.3.2 Nominal pressure (PN) designations The nominal pressure (PN) designations for valves speci
36、fied by nominal size DN shall be: PN 6, PN 10, PN 16, PN 25, PN 40. SANS 1849:2008 Edition 1.1 8 4.3.3 Class designations The class designations for valves specified by nominal pipe size shall be: class 125, class 150, class 300. NOTE The class designations of valves are numbers representing the pri
37、mary pressure service values of the valves in lb/in2. Table 1 DN sizes and nominal pipe sizes for class designated and PN designated valves 1 2 DN Nominal pipe sizes in 40 50 65 2 80 100 125 3 4 5 150 200 250 6 8 10 300 350 400 12 14 16 450 500 600 18 20 24 700 800 900 1 000 1 200 1 400 1 600 1 800
38、2 000 4.4 Pressure/temperature ratings The pressure/temperature ratings shall be as given in table 2 or table 3, except where restrictions on upper temperature are placed by the manufacturer on valves by reason of valve type, trim materials or other factors. In this case, valves shall be marked with
39、 the limiting temperature (see 6.2(c). NOTE The service conditions under which a valve is to be used shall be as specified by the purchaser in accordance with annex A.1(d). SANS 1849:2008 Edition 1.1 9 Table 2 References for pressure/temperature ratings 1 2 Nominal/class pressure designations Refere
40、nces for pressure/temperature ratings PN 6, PN 10, PN 16, PN 25, PN 40 class 150 and class 300 class 125 (cast iron) SANS 1123 BS EN 1759-1 Table 3 Amdt 1 4.5 Dimensions and tolerances of body ends 4.5.1 Double flanged body ends 4.5.1.1 Dimensions Flange dimensions shall be as given in table 4 or ta
41、ble 5 except where threaded holes are required by the design of the valve (see note 2 of 4.6.2.1). NOTE Flanges may be supplied undrilled if specified by the purchaser (see annex A.1(e). 4.5.1.2 Face-to-face dimensions The face-to-face dimensions shall be in accordance with table 5. NOTE Face-to-fac
42、e dimensions shall be as specified by the purchaser in accordance with annex A.1(f). 4.5.1.3 Tolerances on face-to-face dimensions Tolerances on face-to-face dimensions shall be in accordance with table 6. 4.5.2 Wafer body ends 4.5.2.1 Dimensions Body ends shall be capable of mating with connecting
43、flanges complying with the requirements of 4.5.1.1. 4.5.2.2 Face-to-face dimensions The face-to-face dimensions shall be in accordance with table 5. 4.5.2.3 Tolerances on face-to-face dimensions Tolerances on face-to-face dimensions shall be in accordance with table 6. SANS 1849:2008 Edition 1.1 10
44、Table 3 Pressure/temperature ratings for class 125 cast iron valves 1 2 3 Maximum permissible gauge working pressures for nominal valve size Temperature C Valve sizes up to and including 12 in kPa Valve sizes 14 in and above kPa -10 to 66 93 107 13 800 13 100 12 400 10 300 9 300 9 000 121 135 149 12
45、 100 11 700 11 400 8 600 8 300 7 600 163 177 191 204 10 700 10 300 10 000 9 700 7 200 6 900 NOTE Intermediate values may be obtained by linear interpolation. Table 4 Dimensions of class 125 cast iron flanges 1 2 3 4 5 6 7 Nominal size of valve Nominal pipe size Diameter of bolt holes DN in Diameter
46、of flange mm Minimum thickness of flange mm Diameter of bolt circle mm Number of bolts mm in 40 50 (65)a1 2 (2)a127 152 178 14,3 15,9 17,5 98,4 120,6 139,7 4 4 4 15,9 19,0 19,0 80 100 125 3 4 5 190 229 254 19,0 23,8 23,8 152,4 190,5 215,9 4 8 8 19,0 19,0 22,2 : 150 200 250 6 8 10 279 343 406 25,4 28
47、,6 30,2 241,3 298,4 362,0 8 8 12 22,2 22,2 25,4 1 300 350 400 12 14 16 483 533 597 31,8 34,9 36,5 431,8 476,2 539,8 12 12 16 25,4 28,6 28,6 1 1 1 450 500 600 18 20 24 635 698 813 39,7 42,9 47,6 577,8 635,0 749,3 16 20 20 31,8 31,8 34,9 1 1 1 a This size has been retained only for the purpose of repl
48、acing existing valves. Its use for new construction on piping systems should be avoided. SANS 1849:2008 Edition 1.1 11 Table 5 Face-to-face dimensions 1 2 3 4 5 6 7 Valve type Double flanged short Double flanged long Wafer short Wafer medium Wafer long Wafer Face-to-face dimension for nominal pressu
49、res not exceeding Face-to-face dimensions for nominal pressures not exceeding Nominal size PN 25 Class 150 PN 40 Class 300 PN 25 Class 150 PN 25 Class 150 PN 25 Class 150 PN 40 Class 300 DN mm mm mm mm mm mm 40 50 65 106 108 112 140 150 170 33 43 46 80 100 125 114 127 140 180 190 200 46 52 56 64 64 70 49 56 65 150 200 250 140 152 165 210 230 250 56 60 68 76 89 114 70 71 76 300 350 400 178 190 216 270 290 310 78 92 102 114 127
