98
ARTICLE I-5
RADIOGRAPHIC EXAMINATION
AI-500 TECHNIQUE FOR RADIOGRAPHIC
EXAMINATION OF WELDED
JOINTS
AI-501 Welded Joints to Be Radiographed
All welded joints to be radiographed shall be exam-
ined in accordance with Article 2 of Section V, except
as specified below.
(a) The reinforcement on each side of all butt welded
joints shall not exceed the limits specified in AF-221.3.
(For Type No. 2 butt joints, see AF-222.1.)
(b) A complete set of radiographs and records, as
described in T-291 and T-292 of Article 2 of Section
V, for each vessel or vessel part shall be retained by
the Manufacturer until the Manufacturer’s Data Report
has been signed by the Inspector.
(c) The Manufacturer shall certify that personnel
performing and evaluating radiographic examinations
required by this Division have been qualified and
certified in accordance with their employer’s written
practice. SNT-TC-1A
1
shall be used as a guideline
for employers to establish their written practice for
qualification and certification of their personnel. Provi-
sions for training, experience, qualification, and certifi-
cation of NDE personnel shall be described in the
Manufacturer’s Quality Control System (see Appen-
dix 18).
(d) The requirements of T-285 of Article 2 of Section
V are to be used only as a guide. Final acceptance of
radiographs shall be based on the ability to see the
prescribed penetrameter image and the specified hole
or the designated wire of a wire penetrameter.
1
Recommended Practice No. SNT-TC-1A, “Personnel Qualification
and Certification in Nondestructive Testing,” is published by The
American Society for Nondestructive Testing, Inc., 4153 Arlingate
Plaza, Caller No. 28518, Columbus, Ohio 43228-0518.
277
AI-510 ACCEPTANCE STANDARDS FOR
RADIOGRAPHS OF WELDS
AI-511 Unacceptable Defects and Repair
Requirements
Sections of weld that are shown by radiography to
have any of the following types of defects are unaccept-
able unless the defects are removed, the weld is repaired
in accordance with the requirements of AF-252, and
the repaired weld is reexamined in accordance with
the requirements of AF-253:
(a) any type of crack or zone of incomplete fusion
or penetration;
(b) any elongated inclusion, such as slag, which has
a length greater than:
1
⁄
4
in. (6 mm) for tup to
3
⁄
4
in. (19 mm)
1
⁄
3
tfor tfrom
3
⁄
4
in. (19 mm) to 2
1
⁄
4
in. (57 mm)
3
⁄
4
in. (19 mm) for tover 2
1
⁄
4
in. (57 mm)
wheretpthickness of the weld excluding any allowable
reinforcement. For a butt weld joining two
members having different thicknesses at the
weld, tis the thinner of these two thicknesses.
If a full penetration weld includes a fillet weld,
the thickness of the throat of the fillet shall be
included in t.
(c) any group of inclusions in line that has an
aggregate length greater than tin a length of 12t, except
when the distance between the successive imperfections
exceeds 6L, where Lis the length of the longest
imperfection in the group;
(d) rounded indications in excess of that specified
by the acceptance of the porosity of the standards given
in Appendix 8.
AI-511.1 Treatment of Imperfections Believed
Nonrelevant. Any indication of an imperfection which
is believed to be nonrelevant shall be regarded as a
defect unless, on reevaluation, it is shown by reexamina-
tion by the same method or by the use of other
docsity.com
