Phased Array Ultrasonic Testing (PAUT) is an Advanced NDT technique that employs a set of ultrasonic testing (UT) probes comprised of small conventional transducer elements. Each transducer can be
Near Field Testing
NFT technology uses two coils — a transmitter and a receiver. Typically, the receiver coil is close to the transmitter coil, taking advantage of the transmitter’s near-field zone — that is, the zone where the magnetic field from the transmitter coil induces strong eddy currents, axially and radially, in the tube wall. NFT probes operate within the same frequency range as RFET probes..
NFT is specifically suited to detecting corrosion, erosion, and pitting inside carbon steel tubing. NFT is perfect for fin-fan tube heat exchangers because eddy currents do not go through the wall of the tube. NFT is also much more sensitive to defects close to structures such as support plates and tube sheets.
Advantages of Field Inspection Technique
Around 500 tubes can be inspected in 10 hrs.
No need for an external reference coil
Operator dependability is low
Unaffected by structures such as support plates and Tube sheets.
Limitations of Magnetic flux leakage Inspection
No detectability on OD side of the tube.
Limited sensitivity to cracks .
The Remote Field Eddy Current (RFET) is a variation of Eddy Current send-receive probe technique. RFET technique allows the use of the differential- and absolute mode This technique is capable for
MFL probes incorporate a magnetic detector placed between the poles of the magnet where it can detect the leakage field. During inspection, a magnetic circuit of sorts forms between the part and the
Tubes are found commonly in all the major sector like marine, industrial these are also asset for oil gas petroleum and other nuclear industries. Inspection of heat exchanges is crucial as it
Remote visual inspection is a non-destructive testing technique that employs the use of remotely operated cameras and crawlers in order to assess the integrity of components and infrastructure in
Internal Rotary Inspection System (IRIS) is used for inspection of tubes of heat exchangers and steam generators. The system displays circumferential cross section of tubes (wall thickness of tubes)
Long Range UT (LRUT)
Corrosion under insulationThere are certain sections of the pipelines like portions crossing under the road crossing/culverts, underground portion, where online inspection using