In CNG cylinder hydrostatic testing, the UT Machine (Ultrasonic Testing machine) plays a critical safety and quality role. Here’s what it’s mainly used for and why it matters:
Core functions of a UT machine in CNG cylinder hydro testing
1. Wall thickness measurement
Measures the actual thickness of the cylinder wall at multiple locations
Detects thinning due to corrosion, erosion, or manufacturing defects
Ensures thickness is within minimum allowable limits as per standards
2. Detection of internal defects
Finds internal cracks, laminations, voids, inclusions, or flaws
Especially useful where visual inspection can’t reach (inside the metal)
3. Corrosion assessment
Identifies internal corrosion or pitting without cutting or damaging the cylinder
Helps decide whether the cylinder is safe to continue in service
4. Quality verification after hydro test
Confirms that no structural damage occurred due to pressurization
Ensures the cylinder maintained its integrity under test pressure
5. Non-destructiv

• High pressure capacity
• Heavy-duty industrial design
• Reliable & accurate testing
• Custom-built solutions available

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