GB 20951-2020Emission standard of air pollutant for gasoline transport (English PDF)

Foreword

To implement the Environmental Protection Law of the People's Republic of China and the Air Pollution Prevention and Control Law of the People's Republic of China to prevent and control environmental pollution,

To improve environmental quality, develop this standard.

This standard specifies the requirements for the control, monitoring and supervision of oil and gas emissions during the transportation of oil products.

This standard was first published in.2007, and this is the first revision. The main contents of this revision are.

- Adjusted the scope of application to crude oil, gasoline (including alcoholic gasoline, aviation gasoline), aviation kerosene, naphtha and other oil products

Lose process

- Renamed the "Emission Standard of Air Pollutants for Gasoline Transportation" to "Emission Standard for Air Pollutants for Oil Transportation";

- Added oil tanker control requirements.

The implementation of railway tank cars, existing tank cars and newly put into service tankers (150 gross tonnage and above) will be implemented on April 1, 2021.new

The production, import, sale and registration of tank cars will be implemented on July 1, 2021.Existing oil tankers of 8,000 gross tonnage and above

It will be implemented after January 1, 2024.

This standard is the basic requirement for the control of atmospheric pollutants during the transportation of oil products. The provincial people's government has not made provisions on this standard

For projects, local pollutant discharge standards can be formulated; for projects that have been stipulated in this standard, local pollution standards that are stricter than this standard can be formulated

Emissions standards.

Appendix A of this standard is a normative appendix.

Appendix B of this standard is an informative appendix.

This standard was formulated by the Department of Atmospheric Environment and the Department of Regulations and Standards of the Ministry of Ecology and Environment.

This standard was prepared by. Beijing Academy of Environmental Sciences, Chinese Academy of Environmental Sciences, Hanyang Special Vehicle Research Institute.

This standard was approved by the Ministry of Ecology and Environment on December 21, 2020.

This standard will be implemented on April 1, 2021.

From the date of publication of this standard, information can be disclosed in accordance with this standard.

This standard is interpreted by the Ministry of Ecology and Environment.

Emission standard of air pollutants for oil transportation

1 Scope of application

This standard specifies the requirements for the control, monitoring and supervision of oil and gas emissions during the transportation of oil products.

This standard applies to the management of oil and gas emissions from existing oil transportation vehicles, as well as newly produced, imported, sold and newly put into use oil

The registration of transportation vehicles and the management of oil and gas emissions after use.

2 Normative references

This standard quotes the following documents or their clauses. For dated reference documents, only the dated version applies to this standard

quasi. For undated references, the latest version (including all amendments) applies to this standard.

GB/T 5600 General Technical Requirements for Railway Freight Cars

HJ 733 Leakage and open liquid level emission of volatile organic compounds detection technology guide

HJ 819 General Rules of Technical Guidelines for Self-monitoring of Pollutant Discharge Units

"Environmental Monitoring Management Measures" (State Environmental Protection Administration Order No. 39)

"Measures for the Disclosure of Environmental Information of Enterprises and Institutions" (Order No. 31 of the Ministry of Environmental Protection)

3 Terms and definitions

The following terms and definitions apply to this standard.

3.1

Petroleum

A collective term for crude oil, gasoline (including alcoholic gasoline and aviation gasoline), aviation kerosene, and naphtha.

Note. It also includes circulating oil, component oil, condensate oil, light oil, etc., stored in oil storage depots with similar volatile characteristics to the aforementioned oil products.

3.2

Ethanol or methanol gasoline

Gasoline containing 10% or less ethanol fuel (E10) or gasoline containing 30% or less methanol fuel (M30, M15, etc.).

3.3

Road and rail tankers

Automobile tank cars and railway tank cars specially used to transport oil products.

3.4

Marine tanker

Ships dedicated to the transportation of oil products.

3.5

Oil tank compartment

The tank or ship has a liquid-tight separation space.

3.6

Volatile organic compounds (VOCs)

Organic compounds that participate in atmospheric photochemical reactions, or organic compounds determined in accordance with relevant regulations.

3.7

Oil and gas vapor

For VOCs generated during the transportation of oil products, this standard adopts non-methane total hydrocarbons as oil and gas emission control items.

3.8

Vapor sealing point of transportation facility

Automobile tanker vapor recovery coupling valve, tanker manhole cover, tanker vapor recovery pipeline flange blind plate.

3.9

Leakage detection value

Using the prescribed monitoring method, the detection instrument detects the net value of the VOCs concentration of the sealed point after deducting the environmental background value, and the carbon

Mole fraction representation.

3.10

Bottom loading

The oil delivery method is the airtight connection between the filling crane tube and the bottom interface of the tanker.

3.11

Vapor recovery system for tank truck

A device used to seal oil and gas input/output tanks and recover them when loading and unloading oil; the oil and gas recovery system includes an oil and gas recovery coupling

Valves, oil and gas recovery valves, vent valves, pneumatic interlock valves, sealing caps, control pipes and connecting pipes, etc.

3.12

Vapor adaptor valve

A quick closing valve for connecting the tank body to the outside and transmitting oil and gas.

4 Control requirements

5 Emission limits

9500 >V>=5500 <=0.38

5500 >V>=3800 <=0.50

V< 3800 <=0.65

6 Pollutant monitoring requirements

6.1 The enterprises belonging to transportation vehicles shall comply with the relevant laws, the "Environmental Information Disclosure Measures for Enterprises and Institutions" and "Environmental Monitoring Management Measures"

And HJ 819 and other regulations, establish a self-monitoring system for enterprises in accordance with the law, formulate a monitoring plan, and at least check the oil and gas recovery system

Carry out 2 self-monitoring of airtightness and oil and gas sealing points of transportation vehicles. The interval between the 2 monitorings is greater than 3 months. The original monitoring records are kept.

Records, and announces the monitoring results in accordance with the law. See Appendix A for the leak detection method.

6.2 The tank car manufacturer should entrust an institution with inspection qualifications to test the airtightness of the tank car's vapor recovery system.

See Appendix A for the method of sex testing, and make the test results public to the public. See Appendix B for the disclosure content.

6.3 Use a hydrogen flame ionization detector (using methane or propane as calibration gas) to detect and monitor the oil and gas sealing points of transportation vehicles

Sampling and determination methods shall be implemented in accordance with HJ 733.

7 Implementation of standards

7.1 The implementation of railway tank cars, existing tank cars and newly put into service tankers (150 gross tonnage and above) will be implemented on April 1, 2021.

Newly produced, imported, sold and registered tank cars will be implemented on July 1, 2021.Existing oil tankers of 8,000 gross tonnage and above

It will be implemented after January 1, 2024.

7.2 The enterprise is the main body responsible for the implementation of the emission standards and should take necessary measures to meet the pollutant emission control requirements specified in this standard.

7.3 For the airtightness test of the oil and gas recovery system of automobile tankers, the airtightness test value measured on-site according to the requirements of the test specification exceeds this

The limit specified by the standard is judged to exceed the limit.

7.4 For the leakage detection of the oil and gas sealing points of transportation vehicles, the leakage detection value measured on site according to the requirements of the detection specifications exceeds the specifications of this standard.

The set limit is judged to exceed the limit.

7.5 If an enterprise fails to comply with the tactical control requirements stipulated in this standard and constitutes an illegal act, it shall be punished in accordance with relevant regulations such as laws and regulations.

Rationale.

Appendix A

(Normative appendix)

Airtightness detection method of automobile tank car vapor recovery system

A.1 Scope of application

This appendix applies to the airtightness test of the vapor recovery system of automobile tankers.

A.2 Detection principle and summary

The pressure or vacuum method is used to detect the degree of pressure maintained by the oil and gas recovery system. Inflate or vacuum the tank during testing

After reaching a certain pressure, isolate it from the pressure source, record the pressure change value after 5 minutes and compare with the tightness limit to see if it is up to standard.

A.3 Test conditions

Tank trucks should be parked in a location not exposed to direct sunlight for testing. There should be no residual oil in the tank.

A.4 Testing equipment

A.4.1 Nitrogen pressurization system. The tank can be pressurized to 7 kPa.

A.4.2 Low-pressure regulator. It is used to control the pressure of high-pressure air source, and the graduation value is <=20 kPa.

A.4.3 Pressure gauge. Measuring range (-6～6) kPa; maximum allowable error<=+/-2.5%FS; graduation value<=30 Pa.

A.4.4 Oil and gas pipeline inspection joints. The detection joint is equipped with a shut-off valve that can be connected to the pressure and vacuum hose. The detection joint should also be connected to the pressure

Force meter connection.

A.4.5 Vacuum pump. The tank can be evacuated to -2.5 kPa.

A.4.6 Pressure and vacuum hoses. The inner diameter is (6-10) mm, which can withstand the detection pressure.

A.4.7 Pressure relief valve. Connected in series in the pipeline, it can automatically open when the pressure reaches 7 kPa and -2.5 kPa.

A.5 Testing procedures

A.5.1 Inspect the relevant components of the vapor recovery system of the tank car.

A.5.2 Airtightness test of oil and gas recovery system (positive pressure)

Fill the first oil tank of a single-storey tanker or multi-storey tanker to 4.5 kPa, and the pressure change value recorded after 5 minutes

It should be less than or equal to the limit specified in Table 1, and the specific testing should be carried out in accordance with the following requirements.

a) Open and close the tank top cover.

b) Connect the electrostatic grounding connector to the tank.

c) Connect the detection connector to the coupling valve of the tanker's vapor recovery.

d) Connect the shut-off valve to the pressure relief valve, pressurizing and vacuum hoses, and connect the pressure source to the hoses.

e) Slowly increase the pressure, and pressurize the first oil tank of a single-storage tanker truck or a multi-storage tanker truck to 4.5 kPa.

f) Close the shut-off valve and allow the pressure to stabilize. If the pressure is unstable, adjust the pressure to keep it at 4.5 kPa and start timing.

g) After 5 minutes, record the remaining pressure.

h) Calculate the pressure change value, that is, the initial pressure (4.5 kPa) minus the remaining pressure, and compare it with the limit specified in Table 1.

i) If the multiple fuel tanks of the tanker truck are not connected to each other, check each fuel tank according to the above procedure.

A.5.3 Airtightness test of oil and gas recovery system (negative pressurization)

Evacuate the first oil tank of a single-storage tanker truck or multi-warehouse tanker truck to -1.5 kPa, and the pressure change value recorded after 5 minutes should be

If it is less than or equal to the limit specified in Table 1, the specific test shall be carried out in accordance with the following requirements.

a) Connect the vacuum pump to the pressure and vacuum hose.

b) Slowly evacuate the first oil tank of a single-storage tanker or multi-storage tanker to -1.5 kPa.

c) Close the shut-off valve and let the pressure stabilize. If the pressure is unstable, adjust the pressure to keep it at -1.5 kPa and start timing.

d) After 5 minutes, record the remaining pressure.

e) Calculate the pressure change value, that is, the residual pressure minus the initial pressure (-1.5 kPa), and compare it with the limit specified in Table 1.

f) If multiple fuel tanks of the tanker truck are not connected to each other, check each fuel tank according to the above procedure.

A.5.4 Airtightness test of oil and gas recovery valve (positive pressure)

Fill the first oil tank of a single-storage tank car or multi-storage tanker to 4.5 kPa, and close the tanker's vapor recovery valve.

Open the pressure relief valve, and then close the pressure relief valve. The pressure change value recorded after 5 minutes should be less than or equal to the limit specified in Table 1.The specific test should be

Follow the requirements below.

a) Connect the pressure source to the pressure and vacuum hose.

b) Slowly increase the pressure, and pressurize the first oil tank of a single-storage tanker or multi-storage tanker to 4.5 kPa.

c) Close the shut-off valve and let the pressure stabilize. If the pressure is unstable, adjust the pressure to keep it at 4.5 kPa.

d) Close the oil and gas recovery valve of the first oil silo of a single or multi-warehouse tanker truck to isolate the oil and gas recovery pipeline from the oil silo.

e) Open the pressure relief valve and reduce the pressure in the oil and gas recovery pipeline to atmospheric pressure.

f) Close the pressure relief valve and start timing. After 5 minutes, record the remaining pressure in the gas recovery pipeline.

g) Calculate the pressure change value, that is, the residual pressure minus the initial pressure (0 kPa), and compare it with the limit specified in Table 1.

h) If the multiple fuel tanks of the tanker truck are not connected to each other, check each fuel tank according to the above procedure.

Appendix B

(Informative appendix)

Configuration Table of Tank Truck Recovery System

See Table B.1 for the configuration table of the tanker recovery system.

Table B.1 Configuration Table of Tank Truck Recovery System

Equipped with vapor recovery coupling valve, vapor recovery valve, breather valve, manhole cover, oil discharge valve, emergency shut-off valve, anti-overflow probe, anti-overflow socket

model

Manufacturer