Ultrasonic testing of austenitic stainless steel welds False indications and the cause of their occurence – ScienceDirect.

Ultrasonic testing of Stainless Steels is a very tricky thing,basically due to it’s very high grain size. You may have to go in for specialized probe and equipment ( i.e. with high frequency and power ) to over come attenuation problems. Further carrying out UT on a casting is not advisable.

At a construction site, a technician tests a pipeline weld for defects using an ultrasonic phased array instrument. The scanner, which consists of a frame with magnetic wheels, holds the probe in contact with the pipe by a spring. The wet area is the ultrasonic couplant that allows the sound to pass into the pipe wall.

Magnetic particle testing is specified for fillet and PJP welds in all but two categories. If desired, Magnetic Particle Testing (MT) should be used to test fillet welds. Ultrasonic Testing (UT) should not be specified for fillet welds.

Standardized dual 2D matrix array configurations can effectively cover the examination volume for stainless steel welds with the weld cap in place, and also allow the detection of planar and volumetric flaws.

There are three basic ultrasonic inspection methods: pulse echo, through transmission, and resonance.

Ultrasonic testing can be performed using two basic methods – pulse-echo and through-transmission. With pulse echo testing, the same transducer emits and receives the sound wave energy.

Ultrasonic testing technology is based on the ability of high-frequency oscillations (about 20,000 Hz) to propagate into the metal and be reflected from surface scratches, voids, and other discontinuities. relative size of the defect – through the amplitude of the reflected pulse. …

Ultrasonic testing (UT) is a non-destructive test method that utilizes sound waves to detect cracks and defects in parts and materials. It can also be used to determine a material’s thickness, such as measuring the wall thickness of a pipe.

No extra materials are needed,such as solvents,adhesives,or mechanical fasteners.

Methods of weld testing and analysis are used to assure the quality and correctness of the weld after it is completed . This term generally refers to testing and analysis focused on the quality and strength of the weld, but may refer to technological actions to check for the presence, position and extent of welds.

Radiographic and ultrasonic weld inspection are the two most common nondestructive testing (NDT) methods used to detect discontinuities within the internal structure of welds. The obvious advantage of both of these testing methods is their ability to help establish the weld’s internal integrity without destroying the welded component.

Ultrasonic testing (UT) is a family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested.