TOFD Probe for Weld Root Corrosion Testing 1-15MHz Frequency Range

Non-destructive Weld Root Corrosion Testing TOFD one transmission and one reception Broadband Narrow Pulse Probe

The TOFD probe is a key component used in non-destructive testing for ultrasonic diffraction time difference (TOFD) detection.
Working principle: The TOFD technology uses two broadband narrow pulse probes, one for transmission and one for reception, for detection. The probes are symmetrically arranged relative to the centerline of the weld seam. The transmitting probe generates a non-focused longitudinal wave beam that is incident on the inspected workpiece at a certain Angle. Part of the beam propagates along the near-surface and is received by the receiving probe, while part of the beam is reflected from the bottom surface and then received by the probe. The receiving probe determines the location and height of the defect by receiving the diffraction signal from the defect tip and its time difference.

Performance parameters:

Features
*Small wafers: They can achieve a large diffusion Angle and increase the coverage area.
*Wideband: It can generate signals within a much wider frequency range. For instance, the pass-through wave is a signal with a frequency much lower than the center frequency.
*Narrow pulse: To achieve the best resolution.
*High sensitivity: Usually made of piezoelectric composite materials, it has a high acousto-electrical conversion efficiency.

Application scenarios
*Petrochemical industry: It is often used for the inspection of key equipment such as oil pipelines and storage tanks, and can promptly detect internal defects that are prone to occur due to factors such as corrosion and stress, thus avoiding major accidents such as leakage and explosion.
*In the field of power and energy: During the regular maintenance and repair of core equipment such as boilers and steam turbines in the power and energy industry, TOFD probes can be used to deeply detect the integrity of the internal structure of the equipment, promptly identify potential defects and handle them.
*Aerospace manufacturing: It plays a crucial role in the inspection of important components such as aircraft engine blades and fuselage structural parts, capable of accurately detecting internal defects and preventing flight accidents caused by defects.

Special type
*Phased array TOFD probe: Mainly used for corrosion detection at the root of welds.
*Small diameter pipe dedicated TOFD probe: Equipped with a dedicated TOFD wedge for small diameter pipes, it is used for inspecting small diameter pipes.
*COD wedge TOFD probe: By using COD wedges, it can be used to inspect the longitudinal welds of containers to match the corresponding workpiece surfaces.
*Stainless steel housing wedge TOFD probe: The use of a stainless steel housing wedge can protect the wedge.