3.3.2
Inspection of Repairs
Repairs shall be reexamined by the same procedure that originally detected
the faults, and shall meet the standards of acceptance for the original
plate. More than two repairs to the same area are to be accepted at the
discretion of the Contracting Officer.
3.3.3
Acceptance Standards
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NOTE: The extent and diameters of defective areas
depend on the class of service intended for the
plates undergoing inspection. The designer will
indicate the applicable class or classes and the
intended service in the blank space provided for
this purpose. For example: "All plate materials
intended for dynamically loaded structures shall
conform to Class I requirements; those designed for
foundations shall conform to Class III
requirements". Where only one class of service is
required, inapplicable matter in parentheses will be
deleted.
The tolerable extent of lack of bond depends on the
service requirement of the plates and the severity
of forming operations which might increase the size
of the discontinuities judged acceptable.
Reinspection of areas for lack of bond or fusion
shall be specified if the designer believes the
original "safe" areas will extend after cold forming.
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Plates will be unacceptable if they contain any of the defective areas
detailed below:
a. Laminar types of flaws shall be evaluated on the basis of their
proximity to the plate surfaces. For evaluation, the zonal locations
defined below shall be applied in terms of base plate thickness, T.
The T/4 criteria apply when the flaw is situated within T/4 distance of
their nonoverlaid or base plate surfaces. The T/2 criteria apply to
flaws located in the cross sectional area between T/4 layers of either
overlaid or base plate surface. The T/4 criteria shall apply if the
flaw extends from one zone to the other. Any single or two or more
defects resulting in a reflection that exceeds the reject/repair line
simultaneously with a continuous loss of back reflection from the far
surface shall be cause for rejection, provided the extent of the single
or multiple defects cannot be contained within a circle whose diameter
is subject to the limits listed in TABLE II. Plate materials intended
for [_____] shall conform to class [_____] requirements whereas those
intended for [_____] shall conform to class [_____]. [Other plate
materials shall conform to class [_____] requirements.]
b. Lack of bond criteria shall apply to areas at which the cladding is
overlaid on the base plate by a pressure or forging process. Lack of
bond type flaws include:
(1) Any area that results in an interface back reflection
exceeding the reject/repair line and that cannot be contained
within a circle of 150 mm 6 inch diameter.
SECTION 05092A
Page 21
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