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7 ! A 53/A 53M - 06a
<br /> exceeding 12.5 %of the specified wall thickness of the pipe or applicable to the individual lengths.
<br /> 0.012 in. [0.3 mml, whichever is the greater. 10.2 Diameter-For pipe NPS 1'/z [DN 40] or smaller, the
<br /> 9.2.4.3 Longitudinal Notch-A notch 0.031 in. [0.8 mm]or outside diameter at any point shall not vary more than t ''/ea in,
<br /> less in width shall be machined in a radial plane parallel to the [0.4 mm] From the specified outside diameter. For pipe NPS 2
<br /> pipe axis on the outside surface of the pipe, to a depth not [DN 501 or larger, the outside diameter shall not vary more
<br /> exceeding 12.5%of the specified wall thickness of the pipe or than t 1 % from the specified outside diameter.
<br /> 0.012 in. [03 mm], whichever is the greater.The length of the 10.3 Thickness-The minimum wall thickness at any point
<br /> notch shall be compatible with the testing method. shall be not more than 12.5 % under the specified wall
<br /> 9.2.4.4 Compatibility-The calibration standards in the cali- thickness. The minimum wall thickness on inspection shall
<br /> bration pipe shall be compatible with the testing equipment and conform to the requirements given in Table X2.4.
<br /> the method being used.
<br /> 9.2.5 For flux leakage testing, the longitudinal calibration 11. End Finish
<br /> reference notches shall be straight-sided notches machined in a 11.1 If ordered with plain ends, the pipe shall be furnished
<br /> radial plane parallel to the pipe axis. For specified wall to the Following practice, unless otherwise specified.
<br /> thicknesses less than 0.500 in. [12.7 mmj, outside and inside 11.1.1 NPS li/z [DN 40] or Smaller-Unless otherwise
<br /> notches shall be used.For specified wall thicknesses equal to or specified in the purchase order,end finish shall be at the option
<br /> greater than 0.500 in. [12.7 mm],only an outside notch shall be of the manufacturer.
<br /> used.The notch depth shall not exceed 12.5%of the specified 11.1.2 Larger than NPS 1'/a IDN 401:
<br /> wall thickness,or 0.012 in. [0.3 mm],whichever is the greater. 11.1.2.1 Pipe of standard-weight or extra-strong weight, or
<br /> The notch length shall not exceed 1 in. 125 mm],and the notch in wall thickness less than 0.500 in. [12.7 min], other than
<br /> width shall not exceed the notch depth. Outside diameter and double extra-strong weight pipe, shall be plain-end beveled
<br /> inside diameter notches shall be located sufficiently apart to with ends beveled to an angle of 300,+5°,-0°, measured from
<br /> allow separation and identification of the signals. a line drawn perpendicular to the axis of the pipe, and with a
<br /> 9.2.6 Pipe containing one or more imperfections that pro- root face of in. t ''/.i2 in. [1.6 mm ± 0.8 mm].
<br /> duce a signal equal to or greater than the signal produced by the 11.1.2.2 Pipe with a specified wall thickness greater than
<br /> calibration standard shall be rejected or the area producing the 0.500 in. [12.7 mm], and all double extra-strong weight pipe,
<br /> signal shall be rejected. shall be plain-end square cut.
<br /> 9.2.6.1 Test signals produced by imperfections that cannot 11.2 If ordered with threaded ends, the pipe ends shall be
<br /> be identified, or produced by cracks or crack-like imperfec- provided with a thread in accordance with the gaging practice
<br /> tions, shall result in rejection of the pipe, unless it is repaired and tolerances of ANSI B 1.20.I.For standard-weight pipe NPS
<br /> and retested. To be accepted, the pipe shall pass the same 6 [DN 1501 or smaller, refer to Table X3.1 for threading data.
<br /> specification test to which it was originally subjected and the For standard-weight pipe NPS 8 [DN 2001 or larger and all
<br /> retraining wall thickness shall not have been decreased below sizes of extra-strong weight pipe and double extra-strong
<br /> that permitted by the specification. It shall be permissible to weight pipe, refer to Table X3.2 For threading data. Threaded
<br /> reduce the outside diameter at the point of grinding by the pipe NPS 4 [ON 1001 or larger shall have thread protectors on
<br /> amount so removed. the ends not protected by a coupling.
<br /> 9.2.6.2 It shall be permissible to evaluate test signals pro- 11.3 If ordered with couplings, one end of each length of
<br /> duced by visual imperfections in accordance with the provi- pipe shall be provided with a coupling manufactured in
<br /> sions of Section 12.A few examples of such imperfections are accordance with Specification A 865. The coupling threads
<br /> straightener marks, cuttingchips, scratches, steel die stamps, shall be in accordance with the gaging practice of ANSI
<br /> stop marks, or pipe reducer ripple. B 1.20.1. The coupling shall be applied handling-tight, unless
<br /> 9.2.7 The test methods described in Section 9 are not power-tight is specified in the purchase order.Couplings are to
<br /> necessarily capable of inspecting the end portion of pipes.This be made of steel.Taper-tapped couplings shall be furnished on
<br /> condition is referred to as end effect. The length of the end all threaded pipe NPS 21/4 [DN 651 or larger. For pipe smaller
<br /> effect shall be determined by the manufacturer and,if specified than NPS 21h [DN 651, it is regular practice to furnish
<br /> in the purchase order, reported to the purchaser. straight-tapped couplings for standard-weight pipe and taper-
<br /> tapped couplings for extra-strong and double extra-strong
<br /> 10. Permissible Variations in Weight (Mass) and weight pipe. If taper-tapped couplings are required for
<br /> Dimensions standard-weight pipe smaller than NPS 2'/2 [DN 651, it is
<br /> 10.1 Weight (Mass)-The weight (mass) of the pipe shall recommended that line pipe threads in accordance with API
<br /> not vary more than t 10%from its specified weight(mass),as Specification 5B be ordered. The taper-tapped couplings pro-
<br /> derived by multiplying its measured length by its specified vided on line pipe in such sizes may be used on mill-threaded
<br /> weight(mass)per unit length, as given in Table X2.2 or Table standard-weight pipe of the same size.
<br /> X2.3, or as calculated using the relevant equation in ASME 12. Workmanship, Finish, and Appearance
<br /> 836.10M.
<br /> 12.1 The pipe manufacturer shall explore a sufficient num-
<br /> Nors (-For pipe NPS 4 [DN 1001 or smaller, the weight (mass) ber of visual surface imperfections to provide reasonable
<br /> tolerance is applicable to the weights (masses)of the customary lifts of assurance that the hbeenevaluated with respect
<br /> pipe as produced for shipment by the mill.For pipe larger than NPS 4[DN have een properly
<br /> [001,where individual lengths are weighed,the weight(mass)tolerance is to depth.
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