bids are invited for thickness test for above ground piping - thickness test for above ground piping / pressure vessels etc by clock position / quadrant method once in a year: method: ut thickness test on test points located at different length of straight pipe, elbow etc at 12, 3, 6 & 9 clock position. one test point at pipe may have four or more examination point / spot reading. it includes ultrasonic thickness measurement of line pipe parent metal using pulse-echo equipment by ndt level-ii personnel, supply of equipment, calibration blocks, couplant and consumables etc. and submission of thicknessmeasurement reports with minimum thickness reading of each grid. refer detailed scope of work. rate per spot of inspection on a pipe surface. , thickness test on pressure vessels - thickness test on surface of pressure vessels, scrapper receiver etcmethod: to superimpose a grid of size max 1 inch x 1 inch ( or as directed by eic ) using white colour spray paint over a mesh up to desired length and clock position as suggested by eic. it includes ultrasonic thickness measurement of line pipe parent metal using pulse-echo equipment by ndt level-ii personnel, supply of equipment, calibration blocks, couplant and consumables etc. and submission of thickness measurement reports with minimum thickness reading of each grid. for more details see the detailed scope of work. rate per inch of inspection on a 4 inch ( ) wide strip of pipe surface. total quantity : 1