| Data type | Number | Indicators | Evaluation criterion | According to | |||
| Level IV (1 Points) | Level III (2 Points) | Level II (3 Points) | Level I (4 Points) | ||||
| Likelihood | 1 | Equipment inspection status | During the inspection period, distance to the overdue time is 3 months or more | During the inspection period, distance to the overdue time is between 2 and 3 months | During the inspection period, distance to the overdue time is between 1 and 2 months | Overdue inspection | Measures for the Safety Management of Road Transport of Dangerous Goods |
| 2 | Inherent equipment reliability | The long pipe trailer is three rows of wheels and the combination of blasting sheet and safety valve | — | The long pipe trailer is three rows of wheels with only safety valve, or two rows of wheels and blasting sheet and safety valve combination | The long pipe trailer is two rows of wheels with only safety valves | Expert opinion, TSG R0005-2011, Gas station long tube trailer rupture disc abnormal detonation accident analysis and countermeasures | |
| 3 | Vessel operating parameters | 1) The internal temperature of the long-tube trailer is less than 40˚C 2) The natural gas leakage concentration shall not exceed 10% LEL | 1) Internal temperature of the long tube trailer is 40˚C - 50˚C 2) Natural gas leakage concentration is greater than 10% LEL and not more than 20% LEL | 1) Internal temperature of the long tube trailer is 50˚C - 60˚C 2) Natural gas leakage concentration is greater than 20% LEL and not more than 30% LEL | 1) The internal temperature of the long-tube trailer is greater than 60˚C 2) Natural gas leakage concentration is greater than 30% LEL | TSG R0005-2011 Safety Technical Supervision Regulations for Mobile Pressure Vessels, NB/T 47058-2017, Code for Design of Combustible and Toxic Gas Alarms | |
|
| 4 | Continuous driving time | 1) Drive for less than 4 hours continuously during the day; 2) Drive for less than 2 hours continuously at night | 1) Drive continuously for 4 to 4.5 consecutive hours during the day; 2) Drive continuously for 2 to 2.5 hours at night | 1) Drive continuously for 4.5 to 5 consecutive hours during the day; 2) Drive continuously for 2.5 to 3 hours at night | 1) Driving continuously for more than 5 hours during the day; 2) Drive for more than 3 consecutive hours at night | The Regulations on the Implementation of the Road Traffic Safety Law and the Opinions of The State Council on Strengthening the Road Safety Work |
| 5 | Speed | 1) The speed do not exceed the prescribed speed on the highway 2) Other roads do not exceed the prescribed speed | 1) On the highway, exceeding the prescribed speed, but not up to 10% 2) Other roads exceed the prescribed speed but not up to 20% | 1) Over 10% - 20% of the prescribed speed on the highway 2) Other roads exceed 20%-50% of the prescribed speed | 1) More than 20% of the prescribed speed on the highway 2) Other roads exceed 50% of the prescribed speed | Article 45 of road Transport Safety Management Measures of Dangerous Goods, 2018 | |
| 6 | Local weather | 1) Fog 2) Light to moderate rain (rainfall of 10 - 14.9 mm) 3) Average wind force 5 - 6 or gusts force 7 (8.0 m/s - 13.8 m/s or 13.9 m/s - 17.1 m/s); 4) Light snow or sleet 5) Normal weather | 1) Fog 2) Moderate rain (precipitation: 15 - 29.9 mm) 3) Average wind force 7 or gusts force 8 (13.9 m/s - 17.1 m/s or 17.2 m/s - 20.7 m/s); 4) Middle snow; | 1) Heavy fog 2) Heavy rain (precipitation: 30.0 - 49.9 mm) 3) Average wind force 8 or gusts force 9 - 10 (17.2 m/s - 20.7 m/s or 20.8 m/s - 28.4 m/s); 4) Heavy snow; | 1) Heavy fog 2) Rainstorm/ heavy rainstorm/ extremely heavy rainstorm (precipitation of 50.0 - 99.9 mm/100 - 250.0 mm/exceeds 250 mm) 3) Average wind force 9 or gusts force 11 (20.8 m/s or 28.5 m/s) 4) Blizzard; | Grade of Highway Traffic Weather Conditions Rating | |
| 7 | Current road type | Ordinary road section (1 points) | Special road section (4 points) | Accident Statistical Analysis and Code for Setting Up Highway Traffic Signs and Line Markings | |||
| severity | 8 | Property of the filling medium | Non-toxic | Highly toxic | The European Convention on the International Road Transport of Dangerous Goods (ADR), Article 7 of the Regular Inspection Rules of Pressure Vessels, TSG R0005-2011, GB 6944-2012, Dangerous Goods Classification and Name Number | ||
| 9 | Filling capacity | 0 < P 125 MPa·m3 | 125 < P ≤ 250 MPa·m3 | 250 < P ≤ 375 MPa·m3 | P > 375 MPa·m3 | Technical parameters of long-tube trailers, TSG R0005-2011 | |
| PV value: 0 < V ≤ 9.6 MPa·m3 | PV value: 9.6 < V 12 MPa·m3 | PV value: 12 < V ≤ 14.4 MPa·m3 | PV value: V > 14.4125 MPa·m3 | The Guiding Opinions on Developing the Supervision and Management of Major Hazard Sources | |||
| sensitivity | 10 | Sensitive date | Not in the peak period of holidays and major activities (1 points) | During the peak period of holidays and major events (4 points) | Study on Road Speed Limit Design Method Based on Risk Classification | ||
| 11 | The surrounding social environment | Industrial zones exist within every kilometer | Agricultural areas and commercial areas | Residential areas, administrative office area, transportation hub area | Science and technology and cultural areas, cultural relics protection areas, kindergartens, nursing homes and other elderly and children gathering areas | Measures for the Safety Management of Road Transport of Dangerous Goods Research on the Real-time Risk Early Warning Method of Road Dangerous Goods Transport Vehicles | |
| 12 | Surrounding natural environment | 1) There is no water source protection area or nature reserve within each kilometer (1 points) 2) There are water source protection areas or nature reserves within each kilometer, but the transport medium is not strongly oxidized, corrosive or toxic (1 Points) | There are water source reserves and nature reserves within each kilometer, and the transport medium is highly oxidative, corrosive or toxic (4 Points) | Research on the Real-time Risk Early Warning Method of Road Dangerous Goods Transport Vehicles | |||