ASTM E273-15 pdf free download. Standard Practice for Ultrasonic Testing of the Weld Zone of Welded Pipe and Tubing.
ASTM E273-15 describes general ultrasonic testing procedures for the detection of discontinuities in the weld and adjacent heat affected zones of welded pipe and tubing by scanning with relative motion between the search unit and pipe or tube. When contact or unfocused immersion search units are employed, this practice is intended for tubular products having specified outside diameters ≥2 in. (≥50 mm) and specified wall thicknesses of 1/8 to 11/16 in. (3 to 27 mm). When properly focused immersion search units are employed, this practice may also be applied to material of smaller diameter and thinner wall.
A pulsed ultrasonic angle beam shall be propagated in the wall of the pipe or tube by either the surface contact or immersion method. Fig. 1 illustrates the characteristic oblique sound entry into the pipe wall for both contact and immersion examination from one search unit.
The purpose of this practice is to outline a procedure for detecting weld discontinuities such as lack of fusion, pin holes, lack of penetration, longitudinal cracks, porosity and inclusions by the ultrasonic pulse-reflection method.
All indications that are equal to or greater than the reference signals established during standardization as described in Section 7.3, or as specified in Section 6, shall be considered as representing defects that may be cause for rejection of the pipe or tube.
Keywords:angle beam; longitudinal welded pipe; longitudinal welded tubing; nondestructive examination; ultrasonic examination