API 620 states in 5.26 Radiographic/Ultrasonic Examination 5.26.4.3
(a)
When parts of tanks do not require complete examination,
circumferential joints in cylindrical or conical surfaces need to be
prepared and examined for a distance of only 3 in. on each side of any
intersection with a longitudinal joint. All joints in a spherical,
torispherical, or ellipsoidal shape or in any other surface or double
curvature shall be considered longitudinal joints.
On Dec 29 2010, 6:27 am, Srinivas Engr <srinivas.gmsr...@gmail.com>
wrote:
> Dear All
>
> Could anybody pl clear wats the RT requirement for Tank with Shell
> thickness of 12mm as perAPI620?
> Where to refer & Wat is the requirement?
>
> Rgds
> Srinivas
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