According to UW-52 requirements, spot RT shall be perormed for each welding procedure:

- it means that if I have one longitudianal welding welded according to one WPS and another longitudinal welding welded with another WPS but same PQR, Can I consider only one spot for both or I have to perform two spot for each one?

Best Regards

GMQCM

Quote: According to UW-52 requirements, spot RT shall be perormed for each welding procedure:

There is no such a requirement in UW-52.Can you point out where you have read in UW-52?

The summary is, in order to meet UW-52 you have to perform at least 1% RT such that each welder, welding operator and each weld increment (50 ft ) is covered.

Take also consideration of UW-52(a)(4) addtionally where applicable.

_________________
Thanks & Regards,
Nasir
Welding Engineer
DESCON Engineering Limited.
Lahore, Pakistan.
Mobile # 0092-336-4145402

Here is the UW-52 requirement. Please clarify, where you found a reference to welding procedures?

(b) Minimum Extent of Spot Radiographic Examination
( 1) One spot shall be examined on each vessel for
each 50 ft (15 m) increment of weld or fraction thereof
for which a joint efficiency from column (b) of Table UW-
12 is selected. However, for identical vessels or parts, each
with less than 50 ft (15 m) of weld for which a joint
efficiency from column (b) of Table UW-12 is selected,
50 ft (15 m) increments of weld may be represented by
one spot examination.
(2) For each increment of weld to be examined, a
sufficient number of spot radiographs shall be taken to
examine the welding of each welder or welding operator.
Under conditions where two or more welders or welding
operators make weld layers in a joint, or on the two sides
of a double-welded butt joint, one spot may represent the
work of all welders or welding operators.

Thank you for educating me.

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AI-OR-US