ML20210B008
| ML20210B008 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/14/1981 |
| From: | Scott B TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | |
| Shared Package | |
| ML20197F755 | List:
|
| References | |
| FOIA-85-59 QA-QP-11.14-3, NUDOCS 8601270320 | |
| Download: ML20210B008 (3) | |
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' INSTRUCTICN ISSUE TEXAS UTILITIES GENERATING CO,
NUMBER REVISION DATE PAGE CPSES QI-QP-11.14-3 2
OCT 11 1981 1 of 4
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INSPECTION OF h{M CATE b
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1.0 REFERENCES
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1-A AWS DI.1-75, " Structural Welding Code" N
1-B WES-16,"ilelder Qu ali fication Ma trix" I
1-C CP-CPM-6.9B, " Weld Filler Material Control" 1-D QI-QI-11.14-1, " Inspection of Site Fabrication and i
Installation of Structural and Miscellaneous Steel" 1-E WES-029, " Welding Specificatico for Field Fabricatio1 411 Erection of Structural Steel" 1-F CP-QP-16.0, "Nonconfonnances and Deficiencies" 2.0 GENERAL 2.1 PURPOSE AND SCOPE The pu rpose of this instruction is to provide guides fo r visual inspection of aelds in accordance with Reference 1-A l
on safety-related structural /niscellaneous steel other t'1a n cable tray and conduit supports (which are governed by their own procedures).
3.0 INSTRUCTION 3.1 WELDER QUALIFICATION VERIFICATION The QC Inspectar shall veri fy that the welder assigned to perfo nn the activity is qualified to the applicable pro-cedure by checking th? ' lei de r Qualification Ma tri x,
i Reference 1-B.
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3.2 SURVEILLA1:E INSPECTIONS l
The fol lowing random inspections shall be perfonned by the i
QC I n s,2+: to r.
The frequency of these inspections shall be detennined by the Quality Control Supervisor or his designee.
8601270320 851212 mm F01A-85-59 alvu TUGCCoA
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ISSUE l
ION NUMBER DATE PAGE TEXAS UTILITIES GENERATING CO.
i QI-QP-11.14-3 2
0C114 1961 2 of 4 l
1 3.2.1 FIT UP On a random basis, the QC Inspector shall veri fy the following:
l a.
The weld joint surfaces and approximately one inch adjacent to the weld shall be clean and free of moisture, rust, oil, grease, or any type of protective coating. Cleaning may be accomplished by wire brushing, filing, or grinding. Oil and grease should be removed by a stoddard solvent, "Varsol", or approved equal.
I b.
Mismatch (for butt joints) does not exceed 1/8 inch, c.
The gap between parts shall not exceed 3/16 inch and the weld size (leg length) shall be increased by the amount of separation.
d.
For butt welds, root gap is as specified on fabrication drawing.
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Tack welds which are to be incorporated into the final e.
weld neet acceptance criteria of Section 3.3.
Defective tacks shall be repaired or removed.
3.2.2 PREHEAT The QC Ir,spector shall randomly verify that preheat is in accordance with the applicable welding procedure.
Preheat l
should be measured with temperature indicating crayons or r
approved equal.
3.2.3 WELD FILLER MATERIAL VERIFICATION j
i The QC Inspector shall randomly verify that the welder is using electrodes properly issued in accordance with Reference 1-C.
3.3 FINAL VISUAL INSPECTION After completion of welding, the QC Inspector shall verify that the welder has stamped the weld with his ID symbol adjacent to the weld.
The welder ID shall be recorded on the IR.
The QC Inspector shall also inspect the weld for the following:
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i INSTRUCTION l. REVISION l
ISSUE PAGE TEXAS UTluTIES GENERATING CO.
I CPSES QI-QP-11.14-3 2
3 of 4 OCT 14 1981 a.
All welds required by drawing are completed and that no additional welds have been added without appro/al of
,l the Design Engineer, b.
The welds are of the size required by the drawing.
Fillet welds in,any single continuous weld shall be permitted to be 1/16" undersize without correction provided that the undersize weld does not exceed 10 percent of the length of the weld.
Welds shall not exceed the size specified on the drawing by inore than 3/32 inch.
Welds not meeting the size requirements shall be reworked.
Those which are not reworked shall be reported in accordance with Section 3.8.
c.
Welds are free of cracks, overlap, lack of fusion,.'
and surface porosity.
d.
Welds have required degree of penetration.
e.
All cra ters are filled to the full cross section.
f.
Undercut shall not exceed 0.01 inch deep when its direction is trailsverse to the " primary tensile stress nor more than 1/32 inch in all other situations.
g.
For groove welds, the weld shall be completed to a level at least flush with the base metal and shall not be reinforced greater than 1/8 inch, h.
Fillet wald profiles shall be either slightly concave or convex.
The degree of ' convexity shall not exceed 0.1 times the leg length +.03 inches.
i.
The maximum bead wir', for a SMA weld, other than a fillet weld, shall not exceed 4 core wire diameters j
of the electrode being used.
The QC Inspector shall verify that unacceptable welds are repaired by removing the weld material by grinding, machining, chipping, oxygen gouging, or air carbon arc
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gouging, and the surface thoroughly cleaned prior to rewelding.
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