
Vehicle CNG tank inspections can be conducted at Special Equipment Inspection Research Institutes or authorized inspection stations approved by the local vehicle management office in the vehicle's registered location. For the inspection, you need to bring the following documents: the gas tank usage registration certificate issued during the fuel conversion, the gas tank factory qualification certificate, the gas tank installation supervision inspection certificate, the vehicle's driving license, and the owner's ID card. A gas cylinder refers to a mobile pressure vessel that can be refilled and used repeatedly under normal ambient temperatures (-40°C to 60°C), with a nominal working pressure equal to or greater than 0.2MPa (gauge pressure), and a product of pressure and volume equal to or greater than 1.0MPa·L, used for storing gases, liquefied gases, and liquids with a standard boiling point equal to or below 60°C. According to the "Gas Cylinder Safety Technical Regulations" regarding periodic inspections of gas cylinders, the inspection cycle for vehicle compressed natural gas (CNG) cylinders is 3 years. Inspection agencies may appropriately shorten the inspection cycle based on gas quality and the actual usage condition of the cylinders. As per relevant regulations, vehicles with expired gas tanks cannot pass annual inspections. The regulations also stipulate that vehicle gas cylinders must be scrapped along with the vehicle, with the maximum usage period for CNG cylinders in taxis being 8 years. CNG tank inspection and annual review items include: visual inspection, thread inspection, internal inspection, weight (volume) measurement, pressure test, leak test, cylinder accessory inspection (replacement), non-destructive testing, and mounting device inspection. After the inspection, the inspector must accurately fill out the inspection records and promptly issue the "Gas Cylinder Periodic Inspection Report" for qualified or scrapped cylinders.

As a natural gas vehicle owner with over a decade of driving experience, I can tell you that inspecting the gas tank is primarily about ensuring safety. Every time I go to a 4S shop or a professional natural gas conversion center for inspection, they use specialized equipment to check the tank's sealing and pressure to prevent high-speed gas leakage accidents. The law requires inspections every two years, so don't neglect this. In the city, there are certified inspection stations approved by traffic management authorities, such as the XX Gas Cylinder Inspection Center, which is a legitimate option. I usually make an appointment in advance to save time and hassle, and the cost is typically around 200 yuan. If the tank is aging or has cracks, the consequences could be disastrous. Regular inspections can also extend the vehicle's lifespan. Don't try to save money by going to small workshops, as the quality isn't guaranteed. Remember, safety comes first—spending a little money can prevent major problems.

As a daily car user, I find checking the natural gas tank to be simple and quick. The first choice is local 4S shops or large repair shops, which offer one-stop services with transparent pricing. I use a mobile app to find nearby certified spots, such as car service platforms for appointments, and the inspection process takes just 30 minutes. A biennial check is the basic requirement, as it can detect tank corrosion or valve issues to prevent accidents. Additionally, some auto parts stores offer inspection services, but it's recommended to visit officially recommended places, such as road transport bureau stations. The cost is affordable, ranging from 80 to 150 yuan. I also include regular air conditioning checks to ensure overall safety, and remember to bring vehicle documents for registration during inspections. The whole process is hassle-free—don’t wait until problems arise to deal with it.

As a natural gas vehicle user, the main locations for inspecting the natural gas tank are 4S shops and authorized service stations. These places are professional and reliable, conducting safety inspections on the tank every two years to prevent gas leakage risks. Traffic department designated certification centers are also common options—you can go directly or make an appointment, with advanced tools ensuring quick service. The cost is around 100 yuan, and the process is time-efficient. Ensuring driving safety is essential, so don’t overlook these basics.


