Non-Destructive Testing (NDT)

Non-destructive testing (NDT) equipment in this category is ultrasonic and coating inspection gear: thickness gauges, flaw detectors, bolt tension monitors, and the transducers and reference blocks they work with. Most of the range is Dakota NDT, and Seven Star LLC is the agency for Dakota NDT in Oman and the GCC. Alongside it we list Waygate Technologies Krautkramer instruments and coating thickness gauges from Elcometer and Yowexa.

These are the NDT inspection tools used for wall-loss surveys, weld examination and bolted-joint checks on piping, tanks, vessels and structural steel.

NDT equipment groups in this category

• Thickness Gauges: corrosion, precision and specialty ultrasonic gauges, plus coating thickness gauges, for measuring remaining wall or coating from one side.
• Flaw Detectors: handheld and bench-top ultrasonic units that show an A-scan for locating and sizing cracks, lack of fusion and inclusions.
• Bolt Tension: instruments that measure fastener elongation ultrasonically, in handheld, bench-top and multi-channel form.
• Transducers & Accessories: single and dual element probes, delay line tips and calibration blocks.

Choosing NDT testing equipment for the job

Start from the question the inspection has to answer. If it is how much wall is left on a corroded pipe, a corrosion thickness gauge with a dual element probe is the usual tool. If it is the presence of a planar defect in a weld, you need a flaw detector with angle beam probes and a written procedure. Thin, smooth parts with tight tolerances call for a precision gauge and a delay line transducer. Material, thickness range, surface temperature, coating and access decide the probe, and the probe often matters more than the instrument.

Standards and documents that usually apply

Ultrasonic thickness measurement is commonly carried out to ISO 16809 or ASTM E797, weld examination to ISO 17640 or ASME Section V, and inspector qualification follows ISO 9712 or ASNT SNT-TC-1A. Client specifications in the Gulf oil and gas sector often add their own reporting and data logging requirements. On request we provide the manufacturer’s datasheet and the certificate the manufacturer issues with the instrument.

What to send for a quotation

Tell us the material and thickness range, surface condition and temperature, any coating present, the inspection standard or client specification, and the need for data logging or an A-scan display. If you are replacing an older instrument, send its model and probe part numbers so we can check compatibility against the manufacturer documentation.