SY 6503-2000 Combustible Gas Detection Alarm Specification SY6503-2000 Standard download decompression password: www.bzxz.net

ICS 13.100
Registration No.: 8125-2001
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY 65032000
Regulation for using combustible gas detection and alarm instruments2000 - 12 - 12 Issued by
State Administration of Petroleum and Chemical Industry
2001-06-01 Implementation
SY6503--2000
1 Scope
2 Reference standards
3 Basic requirements
Determination of installation scope and detection points
5 Selection of combustible gas detection alarm
6 Installation of fixed instruments
7 Inspection and maintenance
8 Repair and calibration
Appendix A (Suggestive Appendix) Characteristics of combustible gas and toxic gas vapor SY 6503-2000
4.1.2, 5.1, 6.4, and 7.2.3 of this standard are recommended, and the rest are mandatory. In the process of oil and gas field exploration, concurrent production, gathering and transportation, this standard is formulated to regulate the installation and use of combustible gas detection alarms, accurately predict the concentration of combustible gas and prevent fire and explosion accidents. Appendix A of this standard is a reminder appendix. This standard is proposed by China National Petroleum Corporation. This standard is under the jurisdiction of the Petroleum Industry Safety Professional Standard Promotion Technical Committee. This standard was drafted by the China National Petroleum Corporation Safety and Labor Protection Science and Technology Research Institute. The main drafters of this standard are Wang Guochun, Zhang Jifeng, Xu Tiemin, Wang Yunxiu, Fu Zuxian, Zhang Qingquan. IF
1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Specification for the Use of Combustible Gas Detection and Alarm Devices
SY 6503—2000
Regulation for using combustiblc gas detection and alarm devices This standard specifies the basic rules that should be followed for the safe use of combustible gas detection and alarm devices. This standard is applicable to the installation and use of fixed combustible gas detection and alarm devices in flammable and explosive places in the production process of onshore oil and natural gas exploration, development, gathering and transportation.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. SH3063—1999 Design Specifications for Combustible and Toxic Gas Detection and Alarm in Petrochemical Enterprises JJG693—1990 Verification Procedure for Combustible Gas Detection and Alarm 3 Basic Requirements
3.1 Combustible gas detection and alarm should be installed in flammable and explosive places in oil and gas fields. 3.2 The number of detectors of the combustible gas detection and alarm should meet the requirements of the detected area. The effective detection distance of each detector should not be greater than 7.5m indoors and should not be greater than 15nm outdoors. 3.3 The combustible gas alarm controller should be installed in an operating room or duty room with someone on duty. 3.4 The installed and used combustible gas detection and alarm should have a measuring instrument manufacturing certification, explosion-proof performance certification and fire protection certification approved by the national designated agency-
3.5 The combustible gas detection and alarm in use should be calibrated regularly as required. 4 Determination of installation scope and detection points
4.1 Installation scope
4.1.1 Combustible gas detection alarms should be installed in the following places: a) Oil pump room, metering room, oily sewage pump room, valve group, dehydrator operation room above crude oil transfer station; b) Compressor room, metering room, valve group room and ball receiving and sending room for natural gas transportation; c) Compressor room, metering room, valve group room, ball receiving and sending room, storage tank area and loading and unloading facilities of light hydrocarbon system; d) Pump room, metering room, valve group room, storage tank area and loading and unloading facilities of condensate oil and gasoline; e) LPG pump room, bottle filling (filling) room, metering room, gas cylinder warehouse and storage tank area; f) Crude oil loading facilities should comply with the provisions of 4.2.2 in SH306.3-1999. 4.1.2 Combustible gas detection alarms should be installed in the following places: a) Crude oil settling tank operation room, original sleeve storage tank area; b) Oily sewage tank area.
4.2 Determination of detection points
4.2.1 In closed and semi-closed workshops, detectors shall be installed according to indoor requirements; when the area of ​​the closed workshop is less than 50m2, at least one detector shall be installed.
SY6503—2000
4.2.2 Detectors shall be installed in open-air or semi-open-air production facilities according to outdoor requirements. 5 Selection of combustible gas detection alarms
5.1 Selection principles
5.1.1 Select the explosion-proof type of the detector according to the division of the explosion-hazardous area of ​​the place of use. 5.1.2 Select the explosion-proof grade group of the detector according to the category, level and group of the gas to be measured in the place of use. 5.1.3 Select single-channel or multi-channel detection alarms according to the number of detection points. 5.1.4 Select the explosion-proof performance of the alarm controller according to the explosion-hazardous area where the alarm controller is installed. 5.1.5 Select the temperature adaptation range of the detector and controller according to the ambient temperature of the place of use. 5.2 Performance requirements
The main performance indicators of the selected combustible gas detection alarm should meet the following requirements: a) Detection object: combustible gas in the air; b) Detection range: 0~100% combustible gas lower explosion limit (LEL); ) Detection error: within 10% of the lower explosion limit; d) Alarm setting value: the first alarm is less than or equal to 25%LEL, the second alarm is less than or equal to 50%LEL: e) Alarm error: the deviation of the setting value is within ±25%; f) Response time: the response time of the suction instrument should be less than 30s, and the response time of the diffusion instrument should be less than 60s; g) The influence of the power supply voltage: when there is a change of 10%, the accuracy of the alarm does not decrease. 6 Installation of fixed instruments
6.1 The installation height of the detector should be determined according to the density of the combustible gas. The characteristics of combustible gas and steam are shown in Appendix A (suggestive appendix). When the gas density is greater than 0.97kg/m3 (under standard conditions), the installation height should be 0.3~0.6m from the ground; when the gas density is less than or equal to 0.97kg/m3 (under standard conditions), the installation height should be 0.5~1.0m from the roof. 6.2 The installation position of the detector should be determined based on the speed and direction of air flow, the relative position to the potential leakage source, and the ventilation conditions, and should be convenient for maintenance and calibration.
6.3 The detector and alarm controller should be installed in a way that minimizes vibration. 6.4 In areas susceptible to electromagnetic interference, armored cables or cables with metal sheaths should be used. 6.5 The detector should be waterproof. A waterproof cover should be installed in outdoor and indoor places susceptible to water scouring. If the detector connection cable is higher than the detector, waterproof sealing measures should be taken.
6.6 The installation and wiring of the detector shall be carried out in accordance with the requirements specified by the manufacturer and shall comply with the regulations for the installation and wiring of explosion-proof instruments. 6.7 The alarm controller shall have an indicator sign corresponding to the location of the detector or a distribution map of the detector. 7 Inspection and Maintenance
7.1 The management of the combustible gas detection alarm shall be the responsibility of a dedicated person. The responsible person shall have received special training and be responsible for daily inspection and maintenance. 7.2 The combustible gas detection alarm shall be inspected regularly, inspection records shall be kept, and maintenance shall be carried out when necessary. 7.2.1 Press the alarm self-test system button once a week to check the operating status of the indication system. 7.2.2 Perform an appearance inspection every two weeks, including: a) connection parts, movable parts, display parts and control knobs; b) fault lights;
c) detector explosion-proof seals and fasteners; d) whether the detector parts are blocked;
e) detector waterproof cover.
SY6503-—2000
7.2.3 For the detectors installed at high places mentioned in 7.2.2, the inspection cycle can be appropriately extended, but normal operation must be guaranteed. 7.3 Use standard gas to calibrate the combustible gas detection alarm every six months, observe the alarm situation and stable value, and repair it if it does not meet the requirements in 5.2, and make inspection records. 8 Maintenance and calibration
8.1 General requirements
8.1.1 Maintenance and calibration work shall be undertaken by qualified units. 8.1.2 The repaired combustible gas detection alarm shall be fully calibrated according to the requirements of 8.2.1. New installations shall be calibrated and accepted, and a qualified inspection report shall be issued before they are put into use. 8.1.3 Sensors shall be replaced in time according to their service life. 8.2 Calibration
8.2.1 The calibration of the combustible gas detection alarm shall be carried out according to the specified items and procedures in JJG693. 8.2.2 The combustible gas detection alarm that has been put into use shall be calibrated regularly at least once a year. Serial number
Material name
Cyclopropane
Cyclopentane
Isobutane
Cyclohexane
Isopyrane
Isooctane
Ethylcyclobutane
Ethylcyclopentane
Ethylcyclohexane
Methylcyclohexane
Tene-1
Butene-2
Trans-butene-2
Butadiene
Isobutylene
SY 6503-2000
Appendix A
(Indicative Appendix)
Characteristics of flammable and toxic gas vapors
Ignition temperature
/Group
540/T1
515/T1
466/TI
405/T2
260/T3
225/T3
220/T3
205/T3
210/T3
500/T1
380/T2
460/T1||tt ||245/T3
420/T2
410/12
210/T3
260/13
262/13
250/T3
250/T3
425/12
460/T1
3857T2
325/T2
324/T2
420/T2
465/11
305/T2
Combustible and toxic gas vapor characteristics table boiling point
- 161-5
.103.3
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
o-Xylene
m-Xylene
p-Xylene
Styrene
Methyl ethylene
Carbon monoxide
Ethylene oxide
Propylene oxide||tt ||Methyl ether
Ethyl methylaldehyde ether
Dimethyl ether
Dibutyl ether
Isopropyl alcohol
Acrolein
Methyl ethyl ketone
Cyclohexanone
Ignition temperature
560/11
480/T1
430/T2
465/11
530/T1
530/ T1
495711
609/T1
429/T2
430/T2
350/T2
170/T4| |tt||190/T4
240/T3
194/T4
385/T2
422/T2
440/T2||tt| |365/T2
300/T3
399712
426/T2
430/T2
175/T4
20 7/T3
235/T3
465/TI
230/T3
515/T1
420/12
Xuekang manuscript is missing. —
Editor’s note
SY 6503--200
Table AI (pipe)
Boiling point
Explosive secretion (volume fraction)
Fire hazard
Vapor density
Substance name
Methyl formate
Ethyl formate
Methyl acetate
Ethyl acetate
Acetic acid lactone
Butyl acetate
Butyl acetate
Methyl acrylate
Tetrahydrofuran
Methyl chloride
Ethyl chloride| |tt||Ethyl bromide
Propyl chloride
Butyl chloride
Butane bromide
Vinyl chloride
Allylamine
1,2-dichloroethane
1.1-dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptan
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11| |tt||230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T 2
415/T2
390/T2
321/12
623/T1
519/T1
511/T1
520/11
245/ T3
265/12
413/T2
485/T1
640/T1
412/[2
570/TI
260/T3
300 /13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density2 The combustible gas detection alarms that have been put into use should be calibrated regularly at least once a year. Serial No.
Material Name
Cyclopropane
Cyclopentane
Isobutane
Cyclohexane
Isopyrane
Isooctane
Ethylcyclobutane
Ethylcyclopentane
Ethylcyclohexane
Methylcyclohexane
Tene-1
Cis-butene-2
Trans-butene-2
Butadiene
Isobutylene
SY 6503-2000
Appendix A
(Indicative Appendix)
Characteristics of flammable and toxic gas vapors
Ignition temperature
/Group
540/T1
515/T1
466/TI
405/T2
260/T3
225/T3
220/T3
205/T3
210/T3
500/T1
380/T2
460/T1||tt ||245/T3
420/T2
410/12
210/T3
260/13
262/13
250/T3
250/T3
425/12
460/T1
3857T2
325/T2
324/T2
420/T2
465/11
305/T2
Combustible and toxic gas vapor characteristics table boiling point
- 161-5
.103.3
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
o-Xylene
m-Xylene
p-Xylene
Styrene
Methyl ethylene
Carbon monoxide
Ethylene oxide
Propylene oxide||tt ||Methyl ether
Ethyl methylaldehyde ether
Dimethyl ether
Dibutyl ether
Isopropyl alcohol
Acrolein
Methyl ethyl ketone
Cyclohexanone
Ignition temperature
560/11
480/T1
430/T2
465/11
530/T1
530/ T1
495711
609/T1
429/T2
430/T2
350/T2
170/T4| |tt||190/T4
240/T3
194/T4
385/T2
422/T2
440/T2||tt| |365/T2
300/T3
399712
426/T2
430/T2
175/T4
20 7/T3
235/T3
465/TI
230/T3
515/T1
420/12
Xuekang manuscript is missing. —
Editor’s note
SY 6503--200
Table AI (pipe)
Boiling point
Explosive secretion (volume fraction)
Fire hazard
Vapor density
Substance name
Methyl formate
Ethyl formate
Methyl acetate
Ethyl acetate
Acetic acid lactone
Butyl acetate
Butyl acetate
Methyl acrylate
Tetrahydrofuran
Methyl chloride
Ethyl chloride| |tt||Ethyl bromide
Propyl chloride
Butyl chloride
Butane bromide
Vinyl chloride
Allylamine
1,2-dichloroethane
1.1-dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptan
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11| |tt||230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T 2
415/T2
390/T2
321/12
623/T1
519/T1
511/T1
520/11
245/ T3
265/12
413/T2
485/T1
640/T1
412/[2
570/TI
260/T3
300 /13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density2 The combustible gas detection alarms that have been put into use should be calibrated regularly at least once a year. Serial No.
Material Name
Cyclopropane
Cyclopentane
Isobutane
Cyclohexane
Isopyrane
Isooctane
Ethylcyclobutane
Ethylcyclopentane
Ethylcyclohexane
Methylcyclohexane
Tene-1
Cis-butene-2
Trans-butene-2
Butadiene
Isobutylene
SY 6503-2000
Appendix A
(Indicative Appendix)
Characteristics of flammable and toxic gas vapors
Ignition temperature
/Group
540/T1
515/T1
466/TI
405/T2
260/T3
225/T3
220/T3
205/T3
210/T3
500/T1
380/T2
460/T1||tt ||245/T3
420/T2
410/12
210/T3
260/13
262/13
250/T3
250/T3
425/12
460/T1
3857T2
325/T2
324/T2
420/T2
465/11
305/T2
Combustible and toxic gas vapor characteristics table boiling point
- 161-5
.103.3
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
o-Xylene
m-Xylene
p-Xylene
Styrene
Methyl ethylene
Carbon monoxide
Ethylene oxide
Propylene oxide||tt ||Methyl ether
Ethyl methylaldehyde ether
Dimethyl ether
Dibutyl ether
Isopropyl alcohol
Acrolein
Methyl ethyl ketone
Cyclohexanone
Ignition temperature
560/11
480/T1
430/T2
465/11
530/T1
530/ T1
495711
609/T1
429/T2
430/T2
350/T2
170/T4| |tt||190/T4
240/T3
194/T4
385/T2
422/T2
440/T2||tt| |365/T2
300/T3
399712
426/T2
430/T2
175/T4
20 7/T3
235/T3
465/TI
230/T3
515/T1
420/12
Xuekang manuscript is missing. —
Editor’s note
SY 6503--200
Table AI (pipe)
Boiling point
Explosive secretion (volume fraction)
Fire hazard
Vapor density
Substance name
Methyl formate
Ethyl formate
Methyl acetate
Ethyl acetate
Acetic acid lactone
Butyl acetate
Butyl acetate
Methyl acrylate
Tetrahydrofuran
Methyl chloride
Ethyl chloride| |tt||Ethyl bromide
Propyl chloride
Butyl chloride
Butane bromide
Vinyl chloride
Allylamine
1,2-dichloroethane
1.1-dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptan
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11| |tt||230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T 2
415/T2
390/T2
321/12
623/T1
519/T1
511/T1
520/11
245/ T3
265/12
413/T2
485/T1
640/T1
412/[2
570/TI
260/T3
300 /13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density3
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
o-Xylene
m-Xylene
p-Xylene
Styrene
Methyl ethylene
Carbon monoxide
Ethylene oxide
Propylene oxide
Methyl ether
Ethylene Methyl aldehyde ether
Dimethyl ether
Dibutyl ether
Isopropyl alcohol
Acrolein
Methyl ethyl ketone
Cyclohexanone
Ignition temperature
560/11
480/T1
430/T2
465/11
530/T1
530/T1
495711
609/T1
429/T2
430/T2
350/T2
170/T4
1 90/T4
240/T3
194/T4
385/T2
422/T2
440/T2
365 /T2
300/T3
399712
426/T2
430/T2
175/T4
207/ T3
235/T3
465/TI
230/T3
515/T1
420/12
Xuekang manuscript is missing. —
Editor’s note
SY 6503--200
Table AI (pipe)
Boiling point
Explosive secretion (volume fraction)
Fire hazard
Vapor density
Substance name
Methyl formate
Ethyl formate
Methyl acetate
Ethyl acetate
Acetic acid lactone
Butyl acetate
Butyl acetate
Methyl acrylate
Tetrahydrofuran
Methyl chloride
Ethyl chloride| |tt||Ethyl bromide
Propyl chloride
Butyl chloride
Butane bromide
Vinyl chloride
Allylamine
1,2-dichloroethane
1.1-dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptan
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11| |tt||230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T 2
415/T2
390/T2
321/12
623/T1
519/T1
511/T1
520/11
245/ T3
265/12
413/T2
485/T1
640/T1
412/[2
570/TI
260/T3
300 /13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density3
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
o-Xylene
m-Xylene
p-Xylene
Styrene
Methyl ethylene
Carbon monoxide
Ethylene oxide
Propylene oxide
Methyl ether
Ethylene Methyl aldehyde ether
Dimethyl ether
Dibutyl ether
Isopropyl alcohol
Acrolein
Methyl ethyl ketone
Cyclohexanone
Ignition temperature
560/11
480/T1
430/T2
465/11
530/T1
530/T1
495711
609/T1
429/T2
430/T2
350/T2
170/T4
1 90/T4
240/T3
194/T4
385/T2
422/T2
440/T2
365 /T2
300/T3
399712
426/T2
430/T2
175/T4
207/ T3
235/T3
465/TI
230/T3
515/T1
420/12
Xuekang manuscript is missing. —
Editor’s note
SY 6503--200
Table AI (pipe)
Boiling point
Explosive secretion (volume fraction)
Fire hazard
Vapor density
Substance name
Methyl formate
Ethyl formate
Methyl acetate
Ethyl acetate
Acetic acid lactone
Butyl acetate
Butyl acetate
Methyl acrylate
Tetrahydrofuran
Methyl chloride
Ethyl chloride| |tt||Ethyl bromide
Propyl chloride
Butyl chloride
Butane bromide
Vinyl chloride
Allylamine
1,2-dichloroethane
1.1-dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptan
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11| |tt||230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T 2
415/T2
390/T2
321/12
623/T1
519/T1
511/T1
520/11
245/ T3
265/12
413/T2
485/T1
640/T1
412/[2
570/TI
260/T3
300 /13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density1Dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptanbzxZ.net
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11
230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T2
415/T2
390/T2
321/12| |tt||623/T1
519/T1
511/T1
520/11
245/T3|| tt||265/12
413/T2
485/T1
640/T1
412/[2||tt ||570/TI
260/T3
300/13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density1Dichloroethylene
Hydrogen sulfide
Carbon disulfide
Ethyl mercaptan
Propylene
Nitromethane
Nitroethane
Ethyl nitrite
Hydrogen cyanide
Ignition temperature
/Group
465/11
230/T3
465/T1
455/T1
501/T1
427/T2
450/T2
425/T2
427/T2
415/T2
390/T2
321/12| |tt||623/T1
519/T1
511/T1
520/11
245/T3|| tt||265/12
413/T2
485/T1
640/T1
412/[2||tt ||570/TI
260/T3
300/13
651/T1
524/T1
481/TI
418/T2
414/T2
538/T1
430/T2
SY 6503-2000
Table A1 (continued)
Explosive concentration (volume fraction)
Fire hazard
Vapor density
Substance name
Dimethylamine
Natural gas
City gas
Liquid petroleum gas
Hydroxy naphtha
Heavy naphtha
Jet fuel Material
ignition temperature
/group
400/T2
510/T1
484/T1
520/T1
285/[3
233/13
280/T3
200/13
223/T3
SY 6503—200
Table A1 (end)
65--177
50--150
80~250
1151 ~ 300
Note: This table adopts the values ​​in Appendix A of SH 3063--1999 Flash point
-22 --20
Explosive concentration (volume fraction)
Fire hazard
Vapor density
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