We are trading Type-1 CNG cylinders for onboard applications. Extensive research indicates that CNG cylinders provide safe and reliable fuel storage on vehicles when properly installed, protected, and maintained. Owners and operators are strongly encouraged to adopt best practices within their fleets to ensure safe operation throughout the vehicle’s lifespan. Natural gas vehicles equipped with CNG cylinders should undergo periodic inspections, either general or detailed, to evaluate their condition for uninterrupted service. Different countries have varying regulations for the periodic re-assessment of CNG cylinders.