When must CNG cylinders be inspected?

CNG (Compressed Natural Gas) cylinders must be inspected at regular intervals as mandated by safety regulations. Typically, visual inspections are required every three years, while a more thorough hydrostatic test is needed every five years to ensure structural integrity and safety. Additionally, any cylinder showing signs of damage or corrosion should be inspected immediately. Always refer to specific local regulations and manufacturer guidelines for exact requirements.