CNG is a short form of Compressed Natural Gas. It is a gas that is a mixture of hydrocarbons, mostly methane, in the range of 95 percent. Because of its low density, CNG is compressed to 200 bar to improve the vehicle’s internal storage capacity. The characteristics of CNG make it a safe fuel. It’s much lighter and less dense than air, so when it leaks, it is released into the air. Over 3 million vehicles are running on CNG, which proves this reality.

CNG cylinders are constructed in an approach that allows them to withstand pressures. CNG cylinders are secure as they are constructed according to specific specifications and tested before usage, according to international standards and specifications. Furthermore, they have been accepted by the Controller-in-Chief of Explosives. Furthermore, they have been fitted with a “safety-burst disc’, which, when there is an accidental high-pressure or high temperature during filling or at any other time, the disc brakes, and pressure is released. CNG cylinders are made with a special steel alloy and are completely seamless in construction. Their small size permits CNG cylinders to fit easily in the smallest vehicle.

What is CNG Cylinder Hydro Testing?

Hydro CNG cylinder testing is often referred to as Hydrostatic Testing. It is a non-destructive method to check the cylinder for leaks, cracks in the structure, wear and tear, and corrosion. The integrity of the cylinder’s structure is assessed in the next step. This process also checks the strength of the pressure handling system in the cylindrical. This is known as Hydrotesting because the tank has been filled with water before high pressurization will be applied to it by means of a high-pressure pump. If the cylinder has a lower capacity, it may show leakage. The cylinders are removed immediately and not permitted to be utilized.

What Is The Hydro Testing Crucial?

With the growing quantity of CNG vehicles with the increase in CNG vehicles, Hydro Testing has become essential to avoid accidents such as the risk of explosions in cylinders. The importance of Hydro Testing is not to be ignored because it’s for the security of your vehicle and your life. When you refuel, CNG cylinders experience significant pressure on their body. The pressure constantly applied to the walls of the cylinder causes cracks in the metal that cannot take the pressure and then explodes. To avoid these dangerous scenarios, Hydro Testing is necessary.

Under the Indian Standards 8451: 200 & Gas Cylinder Rules, 2004, it is obligatory for every CNG vehicle to have their CNG Hydro checked every three years. The CNG cylinder testing is completed, and a certification of conformity is issued to the purchaser, which is to be placed in an appropriate location. The certificate assists in refilling the cylinder from an approved gas station. Failure to adhere to the following rules could cause the inability to fill up tanks and cause specific sanctions.