How long after the expiration of a car's gas tank can it no longer be inspected?
2 Answers
Car gas tanks cannot be inspected after three years of expiration. Below is relevant information about displacement: 1. Introduction: Displacement refers to the capacity of an engine to deliver all air and fuel mixture to all cylinders during one cycle of operation. It also refers to the volume a piston can displace when moving from one stroke to another. The gas volume discharged by the compressor's final stage within a unit time, converted to the pressure and temperature conditions at the first stage's inlet, represents the compressor's displacement. The calculation method is similar to that used for calculating the volume of a cylinder. 2. Testing Methods: Displacement is typically measured in two ways: direct measurement and indirect measurement. Common measurement methods include the nozzle method, gas tank filling method, differential pressure flow meter, and orifice plate method.
I've been using a natural gas system in my car for several years, and the issue of expired gas cylinders is quite common. Generally speaking, when the design lifespan of the gas cylinder reaches its expiration date, the annual inspection will directly fail. There's no grace period—it becomes unqualified on the very day it expires. This is because expired gas cylinders pose an explosion risk, and the vehicle inspection office checks the validity period during testing—it fails immediately upon expiration. Once, I accidentally let my gas cylinder expire by a few days and was required to replace it immediately or undergo a hydraulic pressure test, which cost me nearly a thousand yuan. Safety is crucial, as an expired gas cylinder may leak and corrode, leading to accidents. I recommend getting it checked one month before the expiration date and having it handled by a certified modification shop. Regularly monitor the gas cylinder's label and pressure gauge while driving, and perform routine maintenance to save money and ensure peace of mind, avoiding last-minute hassles like having your car impounded.
