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1、UDCUDC SH Trade Standards of the People s Republic of China 中华人民共和国行业标准中华人民共和国行业标准 P P SHSH 3063 3063 19991999 Specifications for Design of Combustible Gas and Toxic Gas Detection and Alarm Systems in Petrochemical Industry 石油化工企业可燃气体和石油化工企业可燃气体和 有毒气体检测报警设计规范有毒气体检测报警设计规范 Issued on 15 Apr 1999 Execut
2、ed since 1 Sept 1999 1999 04 15 发布发布 1999 09 01 实施实施 ISSUED BY THE STATE PETROLEUM AND CHEMICAL INDUSTRY BUREAU 国家石油和化学工业局国家石油和化学工业局 发布发布 The Chinese version of standards has precedence to their English translations which are only for internal reference 本英文版为内部资料 仅供参考 以中文 版为准 PREFACE The Specificati
3、ons are revised by this corporation based on the original specifications Specifications for Design of Combustible Gas Detection and Alarm Systems in Petrochemical Industry SH3063 94 according to the notification of the file 1996 JBZ No 250 issued by SINOPEC The specifications consist of six chapters
4、 and two appendices The major purpose of this revision is to add the contents on the design of toxic gas detection and alarm In the revision course the problem that the original specifications contains no content on the design of toxic gas detection and alarm has been given broadly invested and stud
5、ied practical experiences in toxic gas detection and alarm in petrochemical enterprises in the last years have been summarized suggestions and opinions from relevant design production research and development and detecting instrument aspects have been collected and some key issues are discussed many
6、 times finally this final version of the Specifications is confirmed If any part in the Specifications is found to revise or supplement in its implement please offer your suggestion or data to this corporation for reference in future further revision The contact address of this corporation No 27 Zho
7、ngzhou W Rd Luoyang Henan 471003 The Specifications is compiled mainly by Luoyang Petrochemical Engineering Corporation SINOPEC Units participated the complement of the Specifications include Lanzhou Design Institute SINOPEC The Instrument Plane of Yanshan Petrochemical Corporation SINOPEC Shenzhen
8、Anhui Industrial Co Main drafters of the Specifications are Wang Huaiyi Wang Yubin Wang Zipin CONTENTS 1 GENERAL PRINCIPLES 3 2 TERMINOLOGY AND SYMBOLS 3 2 1 Terminology 3 2 2 Symbols 3 3 COMMON STIPULATIONS 4 4 DETERMINATION OF DETECTION POINTS 5 4 1 Processing installations 5 4 2 Storage transport
9、ation Facilities 6 4 3 Locations where Combustible Gases and Toxic gases Diffuse and Accumulate 7 5 DETECTION ALARM SYSTEMS OF COMBUSTIBLE GASES AND TOXIC GASES 8 5 1 System composition and performance 8 5 2 Selection of the detectors 9 5 3 Selection of Alarms or Indicator alarms 10 6 INSTALLATION O
10、F ALARMS FOR COMBUSTIBLE GASES AND TOXIC GASES 12 6 1 Installation of the detector 12 6 2 Installation of alarms or indicator alarms 12 APPENDIX A PROPERTIES TABLE OF COMBUSTIBLE GASES TOXIC GASES AND THEIR VAPORS 13 ATTACHMENT ELUCIDATION OF SOME TERMS USED IN THE SPECIFICATIONS 19 1 GENERAL PRINCI
11、PLES 1 0 1 The Specifications are formulated in order to ensure the safety production and or personal safety in petrochemical enterprises by detecting the concentration of possibly leaked combustible gases and toxic gases and timely making alarm to prevent fire and or explosion hazard 1 0 2 The Spec
12、ifications are applicable for the design of the detection and the alarm of combustible gases and toxic gases for petrochemical enterprises 1 0 3 The current relevant mandatory standards and specifications should be met in addition to the Specifications 2 TERMINOLOGY AND SYMBOLS 2 1Terminology 2 1 1
13、Combustible gas The combustible gas for the purpose of the Specifications means the gases in Class A which lower explosive limits are below 10 v v or the difference between both the upper and lower limits are more than 20 v v or the combustible gases or those containing small amount of toxic gases w
14、hich are formed from liquefied hydrocarbons combustible liquids in Classes Ab and Ba by vaporization 2 1 2 Toxic gas The toxic gas for the purpose of the Specifications means hydrogen sulfide hydrogen cyanide chlorine carbon monoxide acrylonitrile epoxyethane and chlorethylene 2 1 3 Allowable maximu
15、m concentration It means the allowable maximum concentration of a or some hazardous substance s in the workshop air i e the figure which is not allowed to exceed for the hazardous substance s in the sir in working place where workers undertake their job The figure is also called as the highest limit
16、 2 2 Symbols 2 2 1 LEL means the lower explosive limit v v of a combustible gas 2 2 2 TLV means the allowable maximum concentration of a hazardous substance in the workshop air 3 COMMON STIPULATIONS 3 0 1 In a Region 2 or additional Region 2 where combustible gases will be used or produced in the processing installations or storage transportation facilities including the tank farms handling facilities and filling stations used for gases in Class A liquefied hydrocarbons liquids of Class Ab combu
