1、BRITISH STANDARD BS IEC 61520:2000 Metal thermowells for thermometer sensors Functional dimension ICS 17.200.20;25.040.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS IEC 61520:2000 This British Standard, having been prepared under the direction of the Electrotechnical Se
2、ctor Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 2001 BSI 08-2001 ISBN 0 580 37876 4 National foreword This British Standard reproduces verbatim IEC 61520:2000 and implements it as the UK national standard. The UK participation in its pr
3、eparation was entrusted by Technical Committee GEL/65, Measurement and Control, to Subcommittee GEL/65/2, Elements of systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications
4、 have the number 60000 added to the old number. For instance, IEC 27-1 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 implemen
5、t international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport
6、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. aid enquirers to understand the text; present to the responsible internationa
7、l/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests 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 IEC title p
8、age, pages 2 to 15, and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsNORME INTERNATIONALE CEI IEC INTERNATIONAL STANDARD 61520 Premire dition First edition 2000-01 Doigts de gant
9、s mtalliques pour capteurs de temprature Dimensions fonctionnelles Metal thermowells for thermometer sensors Functional dimensionsCommission Electrotechnique InternationaleInternational Electrotechnical Commission BSIEC61520:20000002:CEI 02516 2 CONTENTS Page FOREWORD 3 INTRODUCTION 4 Clause 1 Scope
10、 5 2 Terms and definitions. 5 3 Dimensions 5 Figure 1 Type A External configuration 6 Figure 2 Type A Internal configuration. 7 Figure 3 Type B External configuration 9 Figure 4 Type B Internal configuration. 10 Figure 5 Type C External configuration . 12 Figure 6 Type C Internal configuration 13 Fi
11、gure 7 Type D External configuration . 14 Figure 8 Type D Internal configuration 15 Table 1 Type A Lengths 6 Table 2 Type A Inner diameters 7 Table 3 Type A External threads . 8 Table 4 Type A Internal threads 8 Table 5 Type B Lengths 9 Table 6 Type B Inner diameters 10 Table 7 Type B External threa
12、ds . 11 Table 8 Type B Internal threads 11 Table 9 Type C Lengths 12 Table 10 Type C Inner diameters 13 Table 11 Type C Internal threads 13 Table 12 Type D External diameters and internal threads 14 Table 13 Type D Inner diameters 15 BSIEC61520:2000 BSI082001 20002:CEI 02516 3 INTERNATIONAL ELECTROT
13、ECHNICAL COMMISSION _ METAL THERMOWELLS FOR THERMOMETER SENSORS FUNCTIONAL DIMENSIONS FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC i
14、s to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee
15、interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in acco
16、rdance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from al
17、l interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote
18、international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indica
19、ted in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be t
20、he subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61520 has been prepared by subcommittee 65B: Devices, of IEC technical committee 65: Industrial-process measurement and control. The text of this standard is b
21、ased on the following documents: FDIS Report on voting 65B/391/FDIS 65B/395/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 3. The
22、 committee has decided that the contents of this publication will remain unchanged until 2007. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. BSIEC61520:2000 BSI082001 30002:CEI 02516 4 INTRODUCTION This International Standard specifies only
23、functional dimensions of metal thermowells. When deciding upon such items as wall and tip thickness, operational conditions such as temperature, pressure, flow velocity and media should be taken into consideration together with the thermowell material and natural frequency. BSIEC61520:2000 BSI082001
24、 40002:CEI 02516 5 METAL THERMOWELLS FOR THERMOMETER SENSORS FUNCTIONAL DIMENSIONS 1 Scope This International Standard specifies functional dimensions for metal thermowells for thermo- meter sensors of nominal diameters ranging from 3 mm to 8 mm for use in process control. 2 Terms and definitions Fo
25、r the purposes of this International Standard, the following terms and definitions apply: 2.1 thermowells protective parts machined from solid bar stock. The various types of thermowells are as follows: type A: threaded type; type B: extended threaded type; type C: flanged type; type D: weld-in type
26、. 2.2 insertion length U portion of the thermowell which can be in contact with the medium 2.3 insertion length U 1 (differs from U only on type d thermowells) portion of the thermowell which is inserted into any means of attachment. This insertion length is usually the reference length for any stre
27、ss and resonance calculations. This dimension is usually determined by the user of the thermowell 2.4 tip thickness X the minimum thickness of the well at the tip. May be “v” or “w” shaped 3 Dimensions 3.1 Type A: threaded type Figure 1 illustrates the external configuration of type A thermowells. T
28、he immersion length U may be either cylindrical or tapered. BSIEC61520:2000 BSI082001 50002:CEI 02516 6 Dimensions are as given in table 1. U 1 U K T H L F N (thread) E (thread) Figure 1 Type A External configuration Table 1 Type A Lengths Standard dimensions in millimetres UL 60 100 85 125 110 150
29、160 200 210 250 260 300 360 400 460 500 560 600 NOTE Other lengths may be used as demanded by application. Standard dimensions in inches U L ( ” dimension)1 5 / 8 2 2 44 67 9 10 12 13 15 16 18 19 21 22 24 IEC 2013/99 BSIEC61520:2000 BSI082001 60002:CEI 02516 7 The bore may be of the types illustrate
30、d in figure 2 with dimensions as given in table 2. d 2 d 1 d 1 X G X NOTE X shall be at least equal to the minimum wall thickness, X being the thickness of thermowell material between the tip of the bored hole and the extremity of the thermowell. Figure 2 Type A Internal configuration Table 2 Type A
31、 Inner diameters Standard dimensions in millimetres Nominal diameter of elements Diameter of bore d 1 a G max. min. 3,0 3,5 2 , 0 1 , 0 30 26,5 4,5 5,0 2 , 0 1 , 0 40 35 6,0 7,0 0,25 50 43 8,0 9,0 0,25 70 61 Standard dimensions in inches 0,250 0,257 005 , 0 003 , 0 na 0,375 0,779 008 , 0 000 , 0 0,5
32、00 0,506 006 , 0 000 , 0 a Maximum tolerance on concentricity of the bore shall be 10 % of the minimum wall thickness. IEC 2014/99 BSIEC61520:2000 BSI082001 70002:CEI 02516 8 Table 3 Type A External threads Thread EK (min.) mm F (max.) mm M14 1,5 15 11 M18 1,5 20 15 G” B 20 16 G” B 20 22 G1” B2 52 8
33、 ” NPT F 16 16 ” NPT F 20 22 1” NPT F2 32 8 1 ” NPT F 25 36 NOTE O-ring groove is unnecessary on NPT threads. Table 4 Type A Internal threads Thread N Maximum bore diameter d 2 mm H (min.) mm M 12 1,5 9,5 8 M 14 1,5 11,5 10 M 18 1,5 15,5 12 M 24 1,5 22,0 14 ” NPT F/NPSF 17,0 12 BSIEC61520:2000 BSI08
34、2001 80002:CEI 02516 9 3.2 Type B: extended threaded type Figure 3 illustrates the external configuration of type B thermowells. The immersion length U may be either cylindrical or tapered. Dimensions are as given in table 5. U 1 U K H L F N (thread) E (thread) Figure 3 Type B External configuration
35、 Table 5 Type B Lengths Dimensions in millimetres ULT60 150 5085 200 75 110 200 50 160 250 50 210 300 50 260 400 100 360 500 100 Dimensions in inches UL (exclude dimension) T2 6 24 9 37 12 3 10 15 3 13 18 3 19 24 3 NOTE Other lengths may be used as demanded by application. IEC 2015/99 BSIEC61520:200
36、0 BSI082001 90002:CEI 02516 01 The bore may be of the types illustrated in figure 4 with dimensions as given in table 6. d 2 d 1 d 1 X G X NOTE X shall be at least equal to the minimum wall thickness, X being the thickness of thermowell material between the tip of the bored hole and the extremity of
37、 the thermowell. Figure 4 Type B Internal configuration Table 6 Type B Inner diameters Dimensions in millimetres Nominal diameter of elements Diameter of bore d 1 a Gmax. min. 3,0 3,5 2 , 0 1 , 0 30 26,5 4,5 5,0 2 , 0 1 , 0 40 35 6,0 7,0 0,25 50 43 8,0 9,0 0,25 70 61 NOTE See table 2 for bore diamet
38、er dimensions in inches. a Maximum tolerance on concentricity of the bore shall be 10 % of the minimum wall thickness. IEC 2016/99 BSIEC61520:2000 BSI082001 100002:CEI 02516 11 Table 7 Type B External threads Thread EK (min.) mm F (max.) mm M14 1,5 15 11 M18 1,5 20 15 G” B 20 16 G” B 20 22 G1” B2 52
39、 8 ” NPT F 16 16 ” NPT F 20 22 1” NPT F2 32 8 1 ” NPT F 25 36 Table 8 Type B Internal threads Thread N Maximum bore diameter d 2 mm H (min.) mm M 18 1,5 15,5 12 M 24 1,5 22,0 14 ” NPT F/NPSF 17,0 12 BSIEC61520:2000 BSI082001 110002:CEI 02516 21 3.3 Type C: flanged type Figure 5 illustrates the exter
40、nal configuration of type C thermowells. The immersion length U may be either cylindrical or tapered. Dimensions are as given in table 9. U = U 1 H L N (thread) Figure 5 Type C External configuration Table 9 Type C Lengths Dimensions in millimetres UL90 150 140 200 190 250 120 300 340 400 440 500 54
41、0 600 Standard dimensions in inches UL (excludes ” dimension)2 44 67 9 10 12 13 15 16 18 22 24 NOTE 1 The flanged thermowell shall either be manufactured from a solid forging or the flange welded to the thermowell. NOTE 2 Applicable to flanges with a maximum rating of 10 MP and 1 ” nominal size. IEC
42、 2017/99 BSIEC61520:2000 BSI082001 120002:CEI 02516 31 The bore may be of the types illustrated in figure 6 with dimensions as given in table 10. d 2 d 1 d 1 X G X NOTE X shall be at least equal to the minimum wall thickness, X being the thickness of thermowell material between the tip of the bored
43、hole and the extremity of the thermowell. Figure 6 Type C Internal configuration Table 10 Type C Inner diameters Dimensions in millimetres Nominal diameter of elements Diameter of bore d 1 a Gmax. min. 3,0 3,5 2 , 0 1 , 0 30 26,5 4,5 5,0 2 , 0 1 , 0 40 35 6,0 7,0 0,25 50 43 8,0 9,0 0,25 70 61 NOTE S
44、ee table 2 for standard dimensions in inches. a Maximum tolerance on concentricity of the bore shall be 10 % of the minimum wall thickness. Table 11 Type C Internal threads Thread N Maximum bore diameter d 2 mm H (min.) mm M 18 1,5 15,5 12 M 24 1,5 22,0 14 ” NPT F/NPSF 17,0 12 IEC 2018/99 BSIEC61520
45、:2000 BSI082001 130002:CEI 02516 41 3.4 Type D: weld-in type Figure 7 illustrates the external configuration of type D thermowells. The immersion length U may be either cylindrical or tapered. Dimensions are as given in table 12. U 1 U H L D N (thread) Figure 7 Type D External configuration Table 12
46、 Type D External diameters and internal threads U mm L mm D mm Thread N Maximum bore diameter d 2 mm H (min.) mm65 150 24 M 18 1,5 15,5 1265 200 24 M 18 1,5 15,5 12 110 250 38 ” NPT/S F 17,0 12 110 300 38 ” NPT/S F 17,0 12 IEC 2019/99 BSIEC61520:2000 BSI082001 140002:CEI 02516 51 The bore may be of
47、the types illustrated in figure 8 with dimensions as given in table 13. d 2 d 1 d 1 X G X NOTE X shall be at least equal to the minimum wall thickness, X being the thickness of thermowell material between the tip of the bored hole and the extremity of the thermowell. Figure 8 Type D Internal configu
48、ration Table 13 Type D Inner diameters Dimensions in millimetres Nominal diameter of elements Diameter of bore d 1 a Gmax. min. 3,0 3,5 2 , 0 1 , 0 30 26,5 4,5 5,0 2 , 0 1 , 0 40 35 6,0 7,0 0,25 50 43 8,0 9,0 0,25 70 61 NOTE See table 2 for standard dimensions in inches. a Maximum tolerance on concentricity of the bore shall be
