BS 6023-1981 Glossary of technical terms for automatic steam traps
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ID： |
8CB3F5CB1E6D4173AD2B3BA9D0477468 |
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文件大小(MB)： |
0.17 |
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页数： |
4 |
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文件格式： |
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日期： |
2010-10-4 |
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购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
BS 6023:1981,ISO 6552-1980,UDC 621.186.6:001,4,British Standard Glossary of technical terms for,Automatic steam traps,[ISO title: Automatic steam traps-Definition of technical terms],Glossaire des termes techniques des purgeurs automatiques de vapeur dfeau,Glossar der technischen Ausdrucke fur automatische Kondensationswasserabscheider,National foreword,This British Standard has been prepared under the,direction of the Mechanical Engineering Standards,Committee and is one of a series implementing,international standards in the development of which the,United Kingdom has played an active part.,This standard is identical with ISO 6552 - 1980,'Automatic steam traps- Definition of technical terms",prepared by Technical Committee ISO/TC 153, Valves, of,the International Organization for Standardization (ISO).,For an introduction to the subject matter of this standard,which would usually appear in the foreword, see clause 0.,Terminology and conventions. The text of the,international standard has been approved as suitable for,publication as a British Standard without deviation.,Some terminology and certain conventions are not,identical with those used in British Standards; attention is,especially drawn to the following.,The comma has been used as a decimal marker. In,British Standards it is current practice to use a full,point on the baseline as the decimal marker,Wherever the words International Standard* appear,referring to this standard, they should read as * British,Standard*.,NOTE. With reference to the definition for nominal pressure given,in 2.2r the final four words should be read as 'in the appropriate,International Standard1.,0 Introduction,The purpose of this International Standard is to establish,precise definitions for technical terms and expressions which,are commonly used to describe with a certain accuracy an,automatic steam trap under operating conditions.,This International Standard has to be considered in conjunction,with every other International Standard using these terms and,expressions to describe the technical characteristics or performances,of an automatic steam trap.,1 Scope and field of application,This International Standard gives the definitions of the major,technical terms and expressions used to describe an automatic,steam trap as far as dimension, pressure, temperature and flow,rate are concerned, as well as their corresponding symbols and,units.,2 Definition of technical terms,2.1 Dimension,Term Symbol Unit Definition,Nominal size DN Numerical designation of size which is common to all components,in a piping system other than components designated,by outside diameters. It is a convenient round number for reference,purposes and is only loosely related to manufacturing,dimensions.,In any case, the nominaf size DN cannot be subject to measurement,and shall not be used for purposes of calculation.,British Standards Institution,BS 6023 : 1981,2.2 Pressure,1) 1 bar = 0,1 MPa.,Term Symbol Units11 Definition,Nonrilnal,pressure,PN Numerical designation which is a convenient number for,reference purposes.,All equipment of the same nominal size (DN) designated by the,same PN number shall have the same mating dimensions.,The permissible working pressure depends upon the material,the design and the working temperature, and shall be selected,from the pressure/temperature rating tables in this International,Standard.,Maximum,allowable,pressure,PMA bar MPa Maximum pressure that the shell of the steam trap can withstand,permanently at a given temperature.,Maximum,operating,pressure,PMO bar MPa Pressure for which a steam trap is rated by the manufacturer.,This pressure is normally a function of the limitations related to,the internal equipment of the steam trap.,Operating,pressure,PO bar MPa Pressure measured at the inlet of the steam trap under,operating conditions.,Operating back,pressure,POB bar MPa Pressure measured at the outlet of the steam trap under,operating conditions.,Maximum,operating,back pressure,PMOB bar MPa Maximum permissible pressure at the outlet of the steam trap,allowing correct functioning.,Operating,differential pressure,AP bar MPa Difference between the operating pressure and the operating,back pressure.,Maximum,differential pressure,APMX bar MPa Maximum difference between operating pressure and operating,back pressure.,Minimum,differential pressure,APMN bar MPa Minimum difference between operating pressure and operating,back pressure.,Test pressure PT bar MPa Pressure applied to the steam trap under test.,Maximum,test pressure,PTMX bar MPa Maximum test pressure of the steam trap including its internal,mechanism.,* See the note in the nationa……
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