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1、2022年-2023年建筑工程管理行业文档 齐鲁斌创作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。UDC SHTrade Standards of the Peoples Republic of China中华人民共和国行业标准P SH 3063-1999 Specifications for Design of Combustible Gas and Toxic
2、Gas Detection and Alarm Systems in Petrochemical Industry石油化工企业可燃气体和有毒气体检测报警设计规范Issued on 15 Apr. 1999 Executed since 1 Sept. 19991999-04-15发布 1999-09-01实施 ISSUED BY THE STATE PETROLEUM AND CHEMICAL INDUSTRY BUREAU国家石油和化学工业局 发布PREFACEThe Specifications are revised by this corporation based on the or
3、iginal 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 and two appendices. The major purpose of this
4、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 studied; practical experiences in toxic gas detec
5、tion 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 times; finally, this final version of
6、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 Zhongzhou W. Rd., Luoyang, Henan, 4
7、71003.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 Anhui Industrial Co.Mai
8、n drafters of the Specifications are Wang Huaiyi, Wang Yubin，Wang ZipinCONTENTS1. GENERAL PRINCIPLES32. TERMINOLOGY AND SYMBOLS32.1 Terminology 32.2 Symbols33. COMMON STIPULATIONS44. DETERMINATION OF DETECTION POINTS54.1 Processing installations54.2 Storage-transportation Facilities64.3 Locations wh
9、ere Combustible Gases and Toxic gases Diffuse and Accumulate 75. DETECTION-ALARM SYSTEMS OF COMBUSTIBLE GASES AND TOXIC GASES85.1 System composition and performance85.2 Selection of the detectors95.3 Selection of Alarms or Indicator-alarms106. INSTALLATION OF ALARMS FOR COMBUSTIBLE GASES AND TOXIC G
10、ASES 126.1 Installation of the detector126.2 Installation of alarms or indicator-alarms12APPENDIX A: PROPERTIES TABLE OF COMBUSTIBLE GASES, TOXIC GASES, AND THEIR VAPORS13ATTACHMENT:ELUCIDATION OF SOME TERMS USED IN THE SPECIFICATIONS191. GENERAL PRINCIPLES1.0.1 The Specifications are formulated in
11、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 Specifications are applicable for the design of the
12、 detection and the alarm ofcombustible 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 SYMBOLS2.1 Terminology2.1.1 Combustible gasThe combustible gas for the purpo
13、se 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 which are formed from liquefied hydrocarbon
14、s, combustible liquids in Classes Ab, and Ba by vaporization.2.1.2 Toxic gasThe toxic gas for the purpose of the Specifications means hydrogen sulfide, hydrogen cyanide, chlorine, carbon monoxide, acrylonitrile, epoxyethane, and chlorethylene. 2.1.3 Allowable maximum concentrationIt means the allowa
15、ble 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.2.2 Symbols2.2.1 LEL means th
16、e 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 STIPULATIONS3.0.1 In a Region-2 or additional Region-2 where combustible gases will be used or produced in the processing installations or sto
17、rage transportation facilities (including the tank farms, handling facilities, and filling stations used for gases in Class A, liquefied hydrocarbons, liquids of Class Ab), combustible gas detection and alarm instruments should be set in conformity with the Specifications.In the Region where toxic g
18、ases will be used or produced in the processing installations or storage-transportation facilities, toxic gas detection and alarm instruments should be set in conformity with the Specifications.(1) For a combustible gas or the gas containing a toxic gas, and it may be caused from a leakage event tha
19、t the concentration of the combustible gas reaches 25% of LFL, and the toxic gas cannot reach the allowable maximum concentration, a combustible gas detecting alarm instrument should be set;(2) For a toxic gas or the gas containing a combustible gas, and it may be caused from a leakage event that th
20、e toxic gas reaches the allowable maximum concentration, and the concentration of the combustible gas cannot reach 25% of LFL, a toxic gas detecting alarm instrument should be set;(3) For a gas which is both combustible and toxic, only one toxic gas detecting alarm instrument needs to be set;(4) For
21、 a place where are a or some combustible gas(es) and a or some toxic gas(es), a combustible gas detection and alarm instrument and a toxic gas detecting and alarm instruction should be simultaneously set.Note: For the division of Region-2 or Additional Region-2, see the “Specifications for Design of
22、 Power Installations in the Environments with Explosive and Fire Hazard”, GB 50058.3.0.2 The monitor-alarm of combustible gases and toxic gases should be the alarms of Class I or Class I1. The routine monitor-alarm should be Class I alarm. For the process that needs an interlocking protection system
23、, Class I or Class II alarm should be adopted. A junction output signal is transmitted to the interlocking protection system at the same of Class II alarming.3.0.3 For the hazardous area where nobody is allowed to enter as required for the sake of a special processing need, necessary recording or pr
24、inting device should be done in addition to implementation of the continuous detection, indication, alarm of the releasing source of the combustible gas and/or the toxic gas.3.0.4 The alarm signal should be transmitted to the control room or operation posts where are operators constantly watched the
25、 processing installations and storage-transportation facility.3.0.5 All combustible gas detection and alarm instruments must be subject to certification of a state-designated institution and a state-authorized inspection unit in manufacture, explosion-proof and fire-proof performances of their measu
26、ring instruments. All toxic gas detection and alarm instruments must be subject to certification of a state-designated institution and a state-authorized inspection unit in manufacture of their measuring instruments. All toxic gas detection and alarm instruments of flame-proof type must be subject t
27、o certification of a state-designated institution and a state-authorized inspection unit in explosion-proof performances of their measuring instruments in addition to that for the common type. 3.0.6 Any enterprise that uses the combustible gases and toxic gas alarm instruments should be equipped wit
28、h the necessary standardization device and standard gas.3.0.7 The detector should be set on the windward side of the least frequent wind direction at the releasing source of the combustible gas or toxic gas.3.0.8 The radius of the effectively detectable horizontal plane of a combustible gas detector
29、 should be 7.5 m for indoor use, or 15 m for outdoor use. Usually, one detector may be set for the effective coverage.The distance of a toxic gas detector from the leasing source is preferably not more than 2m for outdoor use, or 1m for indoor use.3.0.9 According to the stipulation in for the Specif
30、ications, the combustible gas alarm or toxic gas alarm of fixed type should be adopted for the place where the alarm should be set. In case it is impracticable to set the alarm of fixed type for insufficient condition, the portable detection and alarm instrument should be equipped.4. LOCATION OF THE
31、 DETECTION POINTS4.1 Processing installations4.1.1 Detectors should be set at the following releasing sources of combustible gases or toxic gases: (1) The compressors for gases of Class A or toxic gases, the pumps for liquefied hydrocarbons, and the dynamic seals of pumps for liquids Class Ab liquid
32、s, or of the multicell pumps for liquids Class Ba, and of the pumps for the liquids which may volatilize out toxic gases.(2) The sampling port from which the gases of Class A, liquefied hydrocarbons, or liquids of Class Ab, or the liquids which may volatilize out toxic gases may leak in the case of
33、abnormal running, and the liquid discharge outlets which may discharge liquids containing liquefied hydrocarbons, liquids of Class Ab or the liquids which may volatilize out toxic gases in the case of abnormal running.(3) The flange and valve group on equipment or pipelines from which gases of Class
34、 A, toxic gases, or liquefied hydrocarbons may leak in the case of abnormal running.4.1.2 For those releasing sources stipulated in Clause 4.1.1 and located in a completely or partially open area of equipment, if the detection point set on the windward side of the least frequent wind direction. The
35、distance of the detection point from the releasing source should not be more than 15 m for the combustible gas detection, or 2m for the toxic gas detection; if the detection point set on the leeward side of the least frequent wind direction, the distance should not be more than 5 m for the combustib
36、le gas detection, or 1m for the toxic gas detection.4.1.3 For those releasing sources stipulated in Clause 4.1.1 and located in a completely or partially enclosed factory building, a detector per 15 m should be set, and the distance of the combustible gas detector from any releasing source is not be
37、 more than 7.5 m preferably. The distance the toxic gas detector from any releasing source is not more than 1 m preferably.4.1.4 When equipments of different classes of fire hazard are located in a completely or partially enclosed factory building, the detector should be set within the scope of 7.5
38、m from the releasing source stipulated in Clause 4.1.1.4.1.5 For the leasing source of a combustible gas that is lighter than air stipulated in Clause 4.1.1 located in a completely or partially enclosed factory building, a or more detector(s) should be set at the highest point easy to accumulate the
39、 combustible gas in addition to a detector to be set above the leasing source.4.2 Storage-transportation Facilities4.2.1 For the storage tank used for liquefied hydrocarbons or liquids of Class Ab, the detectors should be set in the following positions:(1) A detector per 30m should be set inside the
40、 firewall of the liquefied hydrocarbon tank group, and the distance between the detector and the flange or valve of the drain outlet or bottom connection pipe of the tank should not be longer than 15m.(2) Inside the firewall of the liquids of Class Ab, a or more detector(s) should be set, and the di
41、stance between the detector and the flange or valve of the tank drain outlet, sampling port, or bottom (side) connection pipe should not be longer than 15 m.4.2.2 For the handling facilities used for liquefied hydrocarbons or the liquids of Class Ab, a or more detector(s) should be set at the follow
42、ing positions:(1) For the railroad platform equipped with small filling risers, a detector is set for every tank wagon length preferably, and the horizontal distance between the detector and the inlet of the wagon should not be longer than 15 m;(2) For the railroad platform equipped with big filling
43、 risers, a detector is set preferably;(3) The horizontal distance between the position filling tank car and the filling riser in an automobile handling station should not be longer than 15 m. The detector should be located in accordance with the stipulation in for Clause 4.1.2 of the Specifications
44、when there is a surge tank in the automobile handling station.4.2.3 Detectors for the pumps and compressors of the handling facilities should be set in accordance with the stipulations in for Clauses 4.1.1 through 4.1.3 of the Specifications.4.2.4 Detectors in the filling station of liquefied hydroc
45、arbons should be set in accordance with the following requirements:(1) For completely or partially closed cylinder-filling workshop, the distance between the filling port and the detector should be within the range of 5-7.5m;(2) The completely or partially closed cylinder warehouse should accord wit
46、h the stipulations in for Clause 4.1.3 of the Specifications. Around the warehouse partially in the open air, a detector should be set per 15-30ml; one detector should be set when the circumference is longer than 15 m;(3) The distance between the detector and the drain outlet or valve group of the s
47、urge tank should be within the range of 5-7.5 m.4.2.5 For the completely or partially enclosed workshop to fill hydrogen cylinders, the detectors should be set in the highest point above the filling port, where the gas easily stays indoor.4.2.6 For the docks to handle liquefied hydrocarbons, liquids of Classes Ab and Ba, a detector