1、BRITISH STANDARD BS EN 61518:2001 IEC 61518:2001 Incorporating Corrigendum No. 1 Mating dimensions between differential pressure (type) measuring instruments and flanged-on shut-off devices up to 413 bar (41,3 MPa) The European Standard EN 61518:2001 has the status of a British Standard ICS 17.100 N
2、O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 61518:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 June 2001 BSI 28 Ju
3、ne 2002 ISBN 0 580 37581 1 National foreword This British Standard is the official English language version of EN 61518:2001, including Corrigendum February 2002. It is identical with IEC 61518:2001. The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and
4、 control, to Subcommittee GEL/65/2, Elements of systems, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 2
5、7-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications may be found in the BSI Ca
6、talogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
7、correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests
8、 informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover. The BSI copyright date displayed in this document
9、indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 13830 Corrigendum 28 June 2002 Change to EN foreword and Figure 2 EUROPEAN STANDARD EN 61518 NORME EUROPENNE EUROPISCHE NORM March 2001 CENELEC European Committee for Electrotechnical Standardizat
10、ion Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61518:2001 E ICS
11、23.060 English version Mating dimensions between differential pressure (type) measuring instruments and flanged-on shut-off devices up to 413 bar (41,3 MPa) (IEC 61518:2001) Dimensions des raccords entre les instruments de mesure diffrentiel de pression et les dispositifs darrt sur bride allant jusq
12、u 413 bar (41,3 MPa) (CEI 61518:2001) Anschlussmae zwischen Wirkdruck- Messgerten und angeflanschten Absperrorgangen bis 413 bar (41,3 MPa) (IEC 61518:2001) This European Standard was approved by CENELEC on 2001-01-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations whi
13、ch stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European
14、 Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the
15、national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Incorporating corrigendum February 20026 NE1512:8100 - 2 - Foreword
16、The text of document 65B/415/FDIS, future edition 1 of IEC 61518, prepared by SC 65B, Devices, of IEC TC 65, Industrial-process measurement and control, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61518 on 2001-01-01. The following dates were fixed: latest date b
17、y which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-01-01 Annexes designated “normative“ are part of the body of
18、the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61518:2001 was approved by CENELEC as a European Standard without any modification. _ Page2 EN61518:2001CONTENTS INTRODUCTION 4 1 Scope 5 2 Norma
19、tive references. 5 3 Dimensions 6 3.1 Connection dimensions at the differential pressure (type) instrument. 6 3.2 Connection dimensions at the shut-off device 6 3.3 Seal rings . 6 3.4 Flange connection (see figures 4 and 5) 8 4 Installation . 8 5 Material for the bolts 8 6 Marking 9 Figure 1 Connect
20、ion to the differential pressure (type) measuring device Dimensions 9 Figure 2 Connection of a shut-off device type A (with spigot) Dimensions.10 Figure 3 Connection of a shut-off device type B (without spigot) Dimensions 11 Figure 4 Assembly drawing with shut-off device type A (with spigot) 12 Figu
21、re 5 Assembly drawing with shut-off device type B (without spigot) .13 Table 1 Specifications applicable to flat rings Manifolds with extended spigot 7 Table 2 Specifications applicable to flat rings Manifolds without extended spigot . 7 Annex ZA (normative) Normative references to international pub
22、lications with their corresponding European publications 14 Page3 EN61518:2001INTRODUCTION In a process, many shut-off devices (manifolds) are flanged direct on to the differential pressure (type) measuring instrument (instrument). Very often, however, the shut-off device and the measuring device ar
23、e supplied by different manufacturers. It is, therefore, essential to have the mating dimensions properly defined. In the process industry, leakages must be avoided. In some plants, especially in processes involving flammable or toxic gases, such a leakage can lead to risks to the plant, to its inst
24、allations, to the environment, and last, but not least, to personal safety of human beings. In view of accidents reported from various locations, where the accident was caused by leakage between the instrument and the manifold, it was found necessary to standardize the mating dimensions, with its to
25、lerances, for this combination. Page4 EN61518:2001MATING DIMENSIONS BETWEEN DIFFERENTIAL PRESSURE (TYPE) MEASURING INSTRUMENTS AND FLANGED-ON SHUT-OFF DEVICES UP TO 413 bar (41,3 MPa) 1 Scope This International Standard is applicable to differential pressure (type) measuring instruments (instrument)
26、 with a shut-off device (manifold) directly bolted on to them. This standard specifies mating dimensions and tolerances, threads, bolts, and gaskets for a maximum allowable working pressure of 41,3 MPa (413 bar) at 38 C. This standard does not apply to assemblies that provide additional sealing elem
27、ents (adapters) between the instrument and the manifold. Where the possibility exists, shut-off devices shall be mounted on either side of the instrument, and all connections shall then meet this standard. Elements, such as flanged coupling joints, may apply this standard or parts thereof to increas
28、e standardization at the discretion of the supplier and the end-user. This standard is only valid for instrument and manifold flanges manufactured from a metallic material with yield strength equal to, or larger than, 190 N/mm 2 . 2 Normative references The following normative documents contain prov
29、isions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investiga
30、te the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 48:1994, Rubber, vul
31、canized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 898-1:1999, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs ISO 1629:1995, Rubber and latices Nomenclature ISO 3506 (all parts), Mechanical propertie
32、s of corrosion-resistant stainless-steel fasteners Page5 EN61518:2001ISO 3601-1:1988, Fluid systems Sealing devices O-rings Part 1: Inside diameters, cross- sections, tolerances and size identification code ISO 3601-3:1987, Fluid systems Sealing devices O-rings Part 3: Quality acceptance criteria AS
33、ME B18.3.1M:1986 (R1993), Screws, socket head cap (metric series) ASME B18.2.1:1996, Square and Hex Bolts and Screws Inch Series ASTM A193:1999, Specification for alloy steel and stainless steel bolting materials for high- temperature service ASTM A449:1993, Specification for quenched and tempered s
34、teel bolts and studs 3 Dimensions Dimensions in figures and tables are in millimetres, except where stated otherwise. Leak-tight connection between the differential (type) measuring instrument and the flanged instrument manifold depends upon the conformance to the dimensions and the tolerances. 3.1
35、Connection dimensions at the differential pressure (type) instrument See figure 1. 3.2 Connection dimensions at the shut-off device Two designs for the manifold facings are recommended: Type A: design with an extended spigot (see figure 2); Type B: design without an extended spigot (see figure 3). N
36、OTE Type B design may also be suitable for differential pressure (type) transmitters, where the connecting dimensions are not in accordance with this standard. The user is responsible for ensuring compatibility for trans- mitters with different dimensions. 3.3 Seal rings The specifications for the f
37、lat ring are those of tables 1 and 2. The O-rings are in accordance with the ISO standards quoted. Materials and temperature limits for the flat rings and the O-ring are for reference only. It is the responsibility of the user to ensure compatibility between the selected gasket ring material and the
38、 process requirements, such as pressure, temperature, and chemical compatibility. Page6 EN61518:20013.3.1 Seals for manifold design, with extended spigot type A (see figure 2) 3.3.1.1 Flat rings Table 1 Specifications applicable to flat rings Manifolds with extended spigot Material PTFE Graphite 98
39、% graphite, density Composition: Virgin PTFE 1,6 1 , 0 1 , 0 g/cm 3 Dimensions: Outside diameter 24,0 0 , 0 1 , 0 25,1 0 , 0 1 , 0 Inside diameter 17,7 1 , 0 0 , 0 18,0 1 , 0 0 , 0 Thickness 2,7 1 , 0 0 , 0 2,9 2 , 0 1 , 0 Temperature limits: 10 C to +80 C 40 C to 120 C (see note) NOTE The manifold
40、can be rated in accordance with the piping standards. The temperature limits given are based on the limits applicable to the transmitter. 3.3.1.2 O-Ring Dimensions: d1 = 20, d2 = 2,65 (according to ISO 3601-1) Material FPM: according to ISO 1629 IRHD hardness: 90, according to ISO 48 Quality mark: “
41、S” according to ISO 3601-3 3.3.2 Seals for manifold design, without extended spigot type B (see figure 3): 3.3.2.1 Flat rings Table 2 Specifications applicable to flat rings Manifolds without extended spigot Material PTFE Graphite 98 % graphite, density Composition: Virgin PTFE 1,6 1 , 0 1 , 0 g/cm
42、3 Dimensions: Outside diameter 25,4 0 , 0 1 , 0 25,4 0 , 0 1 , 0 Inside diameter 20,0 1 , 0 0 , 0 19,9 1 , 0 0 , 0 Thickness 2,7 1 , 0 0 , 0 2,9 2 , 0 1 , 0 Temperature limits: 10 C to +80 C 40 C to +120 C (see note) NOTE The manifold can be rated in accordance with the piping standards. The given t
43、emperature limits are based on the limits applicable for the transmitter. Page7 EN61518:20013.3.2.2 O-Ring No suitable ISO-standardized O-ring is available for the manifold without the spigot. It is the users responsibility to apply O-rings according to a local standard. 3.4 Flange connection (see f
44、igures 4 and 5) Flange connections, as described, shall only be used within the defined limits for pressure and temperature of the instrument and manifold assembly. 4 Installation Before mounting the instrument onto the manifold, it is necessary to check whether mating dimensions and alignment of th
45、e mating faces of the flanges of the instrument are within the requirements of this standard. In an area of 28 mm around each process port, all surfaces shall be clean and without damage. After the sealing rings have been installed between the manifold and the instrument, care should be taken to tig
46、hten all screws at the connection evenly. For PTFE or graphite seals, it is unavoidable that some of the gasket material creeps between the metallic surfaces. After tightening of the bolts, the gap between the metallic surfaces of the flanged manifold and the instruments shall be less than 0,2 mm. T
47、he thread engagement shall be at least 0,8 times the thread diameter. The required bolt length L should be stated as shown below (flange thickness b): a) For blind threaded transmitters: L min. = b + 9 mm L max. = b + 14 mm; b) For through threaded transmitters: L min. = b + 9 mm. 5 Material for the
48、 bolts The material for the bolts shall be chosen from the following materials, which are minimum material requirements. Medium-carbon steel, type 1, or low-carbon steel, type 2, according to ASTM A449. Carbon steel, quenched and tempered, Class 8.8, according to ISO 898-1. Austenitic steel, carbide
49、 solution treated and strain-hardened, according to ASTM A193, Group B8, Class 2. Austenitic steel, extra strain-hardened, according to ISO 3506, Group A2 or A4, Class 70. Marking on the top of the bolts shall indicate conformance with the applicable standard. Page8 EN61518:20016 Marking Both the transmitter and the manifold, with the interface constructed to this standard, shall have a permanent mark “IEC” on the out
