Usfd manual

Ultrasonic testing of rails was introduced over Indian Railways during early 60s. From a usfd manual beginning, this technique has graduated itself to an extent that today it is one of the most powerful tools of preventive maintenance of the permanent way. During the last 40 years of its existence, usfd manual, a large number of testing procedures, specifications, guidelines and criteria have been issued from time to time based on usfd manual experience gained.

Disclaimer: This Compilation is for educational reference only. For details refer original correction slips. Ultrasonic testing of rails was introduced over Indian Railways during early 60s. From a humble beginning, this technique has graduated itself to an extent that today it is one of the most powerful tools of preventive maintenance of the permanent way. During the last 40 years of its existence, a large number of testing procedures, specifications, guidelines and criteria have been issued from time to time based on the experience gained.

Usfd manual

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Ultrasonic testing of rails was introduced over Indian Railways during early 60s. From a humble beginning, this technique has graduated itself to an extent that today it is one of the most powerful tools of preventive maintenance of the permanent way. During the last 40 years of its existence, a large number of testing procedures, specifications, guidelines and criteria have been issued from time to time based on the experience gained. The advent of fracture mechanics concept coupled with state of the art steel making technology has thrown open a new dimension in the periodicity of ultrasonic examination. The rate of crack propagation and fracture toughness characteristics of rails can be experimentally found which determine the critical crack size. Based on the above knowledge and experience, it was considered necessary to assimilate the entire information on ultrasonic examination of rails and present in the form of a manual so as to guide the ultrasonic personnel in testing, interpretation and decision-making. Subsequently, a revision was issued in in view of the experience gained in the field of USFD testing and maintenance practices. This revised edition is therefore prepared incorporating all the amendments and revisions. The provisions made are mandatory for all ultrasonic personnel and supersede all previous instructions in case they happen to be contradictory to the instructions contained in this manual.

Usfd manual

Disclaimer: This Compilation is for educational reference only. For details refer original correction slips. Ultrasonic testing of rails was introduced over Indian Railways during early 60s. From a humble beginning, this technique has graduated itself to an extent that today it is one of the most powerful tools of preventive maintenance of the permanent way. During the last 40 years of its existence, a large number of testing procedures, specifications, guidelines and criteria have been issued from time to time based on the experience gained. The advent of fracture mechanics concept coupled with state of the art steel making technology has thrown open a new dimension in the periodicity of ultrasonic examination. The rate of crack propagation and fracture toughness characteristics of rails can be experimentally found which determine the critical crack size. Based on the above knowledge and experience, it was considered necessary to assimilate the entire information on ultrasonic examination of rails and present in the form of a manual so as to guide the ultrasonic personnel in testing, interpretation and decision-making. Subsequently, a revision was issued in in view of the experience gained in the field of USFD testing and maintenance practices.

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Defects not covered in a and b. Welding, traction bond welding crack, at weld Corrosion. Origin of defect as detected by USFD Flag for inappropriate content. Whether within service life 6. Para 8. Way will carry out testing for a length of 2 m i. Description Page No. Among the various sections, due for Through Weld Renewal TWR as per this criteria, Chief Track Engineer will decide inter se priority based on incidences of defect detection and weld failures. Thermit 3. It may also require fuelling and watering arrangements as required for SPURT car, for fuelling, watering, shunting and placement, are all to be arranged by AEN. This exercise shall be carried out two- three times from each side of the weld and signal from simulated flaw should appear at a distance of approximately mm for 52 kg rail. To identify the inherent defects in Rails. Damage done 4.

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Vertical longitudinal crack in foot: Such cracks develop from sharp chamfers on the bottom surface of the rail foot. Ultrasonic testing of rails was introduced over Indian Railways during early 60s. Bolt hole crack: Such cracks often run diagonally and may run towards head or the foot. Building up 8. Rail in Plan Fig. Zone—III: To be tested by the 70o 2 MHz single crystal probe by hand probing at Toward the head portion from both the sides of the head. As per criteria laid down by Railway Board. The probe shall be moved towards the saw cut in zig-zag manner so as to get maximum reflection from saw cut. However, mechanical spares of trolley, standard items such as, battery, battery charger etc. Transverse fatigue crack in head: They resemble a kidney in shape in the railhead and USFD is ideally suited for detecting them. This gain setting shall be utilized during testing of SEJ while testing with 70o angle probe with probe movement towards SEJ.