ASTM B552-2019 pdf free download

ASTM B552-2019 pdf free download,Standard Specification for Seamless and Welded Copper–Nickel Tubes for Water Desalting Plants
11. Nondestructive Test Requirements
11.1 Electromagnetic (Eddy-Current) Test (Seamless Tube): 11.1.1 Each tube shall be subjected to an eddy-current test. Testing shall follow the procedures of Practice E243. The purchaser may specify either of the tests in 11.3 or 11.4 as an alternative to the eddy-current test. 11.1.2 The provisions for the determination of “end-effect” in Practice E243 shall not apply. 11.1.3 Either notch depth or drilled hole standards shall be used. The depth ofthe round-bottom transverse notches and the diameters of the drilled holes in the calibrating tube used to adjust the sensitivity of the test are shown in Tables 8–11, respectively. 11.1.4 Tubes that do not actuate the signaling device of the testing unit shall be considered as conforming to the require- ments of the test. Tubes causing irrelevant signals because of moisture, soil, and like effects may be reconditioned and retested. Such tubes, when retested to the original test parameters, shall be considered to conform ifthey do not cause output signals beyond the acceptable limits. Tubes causing irrelevant signals because of identifiable handling marks may be retested by the hydrostatic test prescribed in 11.3, or the pneumatic test prescribed in 11.4. Tubes meeting requirements of either test shall be considered to conform if the tube dimensions are within the prescribed limits, unless otherwise agreed to by the manufacturer or supplier and the purchaser order.11.2 Electromagnetic (Eddy-Current) Test (Welded Tube): 11.2.1 Each tube shall be passed through an eddy-current testing unit adjusted to provide information on the suitability of the tube for the intended application. Testing shall follow the procedures of Practice E243, except as modified in 11.2.4. 11.2.2 Tube supplied welded and annealed may be tested in the welded condition before anneal or heat treatment, unless otherwise agreed upon between the manufacturer or supplier and the purchaser. The purchaser may specify either ofthe tests in 11.3 or 11.4 as an alternative to the eddy-current test. 11.2.3 Either notch depth or drilled hole standards shall be used. The depth ofthe round-bottom transverse notches and the diameters of the drilled holes in the calibrating tube used to adjust the sensitivity of the test are shown in Tables 8–11, respectively. 11.2.4 The discontinuities used to calibrate the test system may be placed in the strip from which the tube will be manufactured. These calibration discontinuities will pass through the continuous operations of forming, welding, and eddy-current testing. The test unit sensitivity required to detect the resultant discontinuities shall be equivalent to or greater than that required to detect the notches or drilled hole of Tables 8–11, respectively, or other calibration discontinuities that may be used by mutual agreement between the manufac- turer and the purchaser. Calibration discontinuities may be on the outside tube surface, the internal tube surface, or through wall and shall be spaced to provide signal resolution for adequate interpretation. Each calibration discontinuity shall be detected by the eddy-current tester.11.2.5 Tubes that do not actuate the signaling device of the eddy-current tester shall be considered as conforming to the requirements of this test. Tubes causing irrelevant signals because ofmoisture, soil, and like effects may be reconditioned and retested. Such tubes, when retested to the original test parameters, shall be considered to conform ifthey do not cause output signals beyond the acceptable limits. Tubes causing irrelevant signals because of identifiable handling marks may be retested by the hydrostatic test prescribed in 11.3, or the pneumatic test prescribed in 11.4. Tubes meeting requirements of either test shall be considered to conform if the tube dimensions are within the prescribed limits, unless otherwise agreed to by the manufacturer or supplier and the purchaser. 11.3 Hydrostatic Test: 11.3.1 When specified in the contract or purchase order, each tube shall withstand, without showing evidence of leakage, an internal hydrostatic pressure sufficient to produce a fiber stress of 7000 psi (48 MPa) as determined by the following equation for thin hollow cylinders under tension.