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The QC Inspector shall inspect and approve each joint preparation, assembly practice, welding technique,joint fit-up,
<br /> and the performance of each welder, welding operator, and tack welder to make certain that the applicable requirements of
<br /> this code and the approved Welding Procedure Specification (WPS) are met. The QC Inspector shall examine the work to
<br /> make certain that it meets the requirements of Sections 3 and 6.26. The size and contour of all welds shall be measured using
<br /> suitable gages. Visual inspection for cracks in welds and base metal, and for other discontinuities shall be aided by strong
<br /> light,magnifiers,or such other devices as may be helpful. Acceptance criteria different from those specified in this code may
<br /> be used when approved by the Engineer.
<br /> Section 6.6.5, "Nonspecified NDT Other than Visual," of AWS D1.1, Section 7.6.5 of AWS D1.4 and Section 6.6.5 of
<br /> AWS D1.5 shall not apply.
<br /> For any welding, the Engineer may direct the Contractor to perform NDT that is in addition to the visual inspection or
<br /> NDT specified in the AWS or other specified welding codes, in the Standard Specifications, or in these special provisions.
<br /> Except as provided for in these special provisions,additional NDT required by the Engineer,and associated repair work,will
<br /> be paid for as extra work as provided in Section 4-1.03D, "Extra Work," of the Standard Specifications. Prior to release of
<br /> welded material by the Engineer, if testing by NDT methods other than those originally specified discloses an attempt to
<br /> defraud or reveals a gross nonconformance, all costs associated with the repair of the deficient area, including NDT of the
<br /> weld and of the repair,and any delays caused by the repair,shall be at the Contractor's expense. A gross nonconformance is
<br /> defined as the sum of planar type rej ectable indications in more than 20 percent of the tested length.
<br /> When less than 100 percent of NDT is specified for any weld, it is expected that the entire length of weld meet the
<br /> specified acceptance-rejection criteria. Should any welding deficiencies be discovered by additional NDT directed or
<br /> performed by the Engineer that utilizes the same NDT method as that originally specified,all costs associated with the repair
<br /> of the deficient area, including NDT of the weld and of the weld repair, and any delays caused by the repair, shall be at the
<br /> Contractor's expense.
<br /> Repair work to correct welding deficiencies discovered by visual inspection directed or performed by the Engineer, and
<br /> any associated delays or expenses caused to the Contractor by performing these repairs,shall be at the Contractor's expense.
<br /> The Engineer shall have the authority to verify the qualifications or certifications of any welder, QC Inspector, or NDT
<br /> personnel to specified levels by retests or other means approved by the Engineer.
<br /> Inspection and approval of all joint preparations, assembly practices, joint fit-ups, welding techniques, and the
<br /> performance of each welder,welding operator,and tack welder shall be documented by the QC Inspector on a daily basis for
<br /> each day welding is performed. For each inspection, including fit-up, Welding Procedure Specification (WPS)verification,
<br /> and final weld inspection, the QC Inspector shall confirm and document compliance with the requirements of the AWS or
<br /> other specified code criteria and the requirements of these special provisions on all welded joints before welding, during
<br /> welding,and after the completion of each weld.
<br /> In addition to the requirements specified in the applicable code, the period of effectiveness for a welder's or welding
<br /> operator's qualification shall be a maximum of 3 years for the same weld process, welding position, and weld type. If
<br /> welding will be performed without gas shielding,then qualification shall also be without gas shielding. Excluding welding of
<br /> fracture critical members, a valid qualification at the beginning of work on a contract will be acceptable for the entire period
<br /> of the contract,as long as the welder's or welding operator's work remains satisfactory.
<br /> In addition to the requirements of AWS D1.1, welding procedures qualification for work welded in conformance with
<br /> that code shall conform to the following requirements:
<br /> A. The travel speed, amperage, and voltage values that are used for tests conducted per AWS D1.1, Section 4.1.1,shall
<br /> be consistent for each pass in a weld joint and shall in no case vary by more than ±10 percent for travel speed,
<br /> f 10 percent for amperage, and f7 percent for voltage as measured from a predetermined target value or average
<br /> within each weld pass. The travel speed shall in no case vary by more than f15 percent when using submerged arc
<br /> welding.
<br /> B. When a nonstandard weld joint is to be made using a combination of WPSs, a single test may be conducted
<br /> combining the WPSs to be used in production, provided the essential variables, including weld bead placement, of
<br /> each process are limited to those established in Table 4.5.
<br /> In addition to the requirements of AWS D1.5, Section 5.12 or 5.13,welding procedures qualification for work welded in
<br /> conformance with that code shall conform to the following requirements:
<br /> A. Unless considered prequalified, fillet welds shall be qualified in each position. The fillet weld soundness test shall
<br /> be conducted using the essential variables of the WPS as established by the Procedure Qualification Record(PQR).
<br /> B. For qualification of joints that do not conform to Figures 2.4 and 2.5 of AWS D1.5, a minimum of two WPS
<br /> qualification tests are required. The tests shall be conducted using both Figure 5.1 and Figure 5.3. The test
<br /> conforming to Figure 5.1 shall be conducted in conformance with AWS D1.5, Section 5.12 or 5.13. The test
<br /> Contract No. 10-OM7104
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