Standard Practice for Examination of Seamless, Gas-Filled, Steel Pressure Vessels Using Angle Beam Ultrasonics

Importancia y uso:

5.1 The purpose of this practice is to provide a procedure for locating, detecting and estimating the relevance of longitudinally oriented crack-like discontinuities which have been previously indicated by AE examination.

5.2 This practice may be used for a pressure vessel that is situated in such a way as to limit access to the vessel's wall. Typical examples include tube trailers and gas tube railroad cars. Since the pressure vessels are stacked horizontally in a frame, with limited space between them, the circumferential location of a discontinuity may be a distance away from the search unit (several skip distances).

5.3 This practice has been shown to be effective for cylinders between 9 in. (229 mm) and 24 in. (610 mm) in diameter and wall thicknesses between ¹/₄ in. (6.4 mm) to 1 in. (26 mm) with discontinuities that are oriented longitudinally in pressure vessel sidewall.

5.4 To reliably detect discontinuities by the procedure in this practice, a significant part of the reflecting surface must be transverse to the beam direction.

5.5 Evaluation of possible discontinuity in the end faces indicated by AE is not covered by this practice.

Subcomité:

E07.06

Referida por:

E1419_E1419M-15AR20, E0543-21, E0543-21

Volúmen:

03.03

Número ICS:

19.100 (Non-destructive testing)

Palabras clave:

acoustic emission; angle-beam; contact examination; couplant; crack detection; gas-filled pressure vessels; nondestructive testing; reference notches; seamless steel pressure vessels; standardizing ring; ultrasonic examination;