Details: phased array ultrasonic testing (paut) of old and new weld joints of boilertubes1. phased array ultrasonic testing (paut) on circumferential old & new weld joints of boiler tubes(economiser,super-heater, re-heater, water wall & other tubes, as identified by station) is to becarried out for assessment of healthiness of the weld joints. for water wall tubes, covered byinsulation, only portion of weld on fireside will be tested with probes/wedges dismantled fromthe scanner.2. agency has to arrange all equipment and skilled technicians for phased array ultrasonictesting (paut) of high pressure boiler tube joints during unit o/h & detailed report showing all theinspection findings has to be submitted to ntpc in prescribed format.3. agency may have to carry out phased array ultrasonic inspection of boiler tubes during unito/h of sizes varying from od 30mm to 70 mm and thickness ranging from 3.0 mm to 8.0 mm.tube materials are of carbon steel, alloy steel, etc. (sa 210, sa 213 gr t12, sa 213
Sector: Power Sector