ML17277A436

Rev 0 to, Visual Exam Acceptance Criteria for Reverification Insp of Welded Structures.

ML17277A436
Person / Time
Site:	Columbia
Issue date:	05/12/1982
From:	Cygelman A BURNS & ROE CO.
To:
Shared Package
ML17277A434	List: ML17277A433 ML17277A436
References
QVI-09, QVI-09-R00, QVI-9, QVI-9-R, NUDOCS 8302090404
Download: ML17277A436 (14)

Text

QVI-09 Rev. 0 WP-2 PROJECT VISUAL EXAMINATION ACCEPTANCE CRITERIA FOR REVERIFICATION INSPECTION

. WELDEO STRUCTURES Approved Burns h R nc.

A. I. Cygelman Attachment 2 (Page 1 of 9) 8302090404 830ii7 Page 11 of 19 PDR ADOCK 05000397 6,>> '

PDR

QVI-09 Rev. 0 1.0 SCOPE This document-provides, visual examination acceptance criteria -for reveri-

.fication inspection of'tructural steel and miscellaneous metal, welding, performed in accordance with AWS 01.1, the Structural Welding Code.

These criteria reflect requirements consistent with the engineering approval specified in AWS Ol.l for evaluation of structural welding.

This document."also includes acceptance standards for light gauge HVAC ductwork, and other systems which are not specifically covered by AWS Ol.l.

1.1'hese criteria shall be used by Construction Quality Control for performing reverification inspection by including it on the QCIR as an applicable inspection reference criteria document to evaluate deviations to AWS Dl.l.

2.0 CODES ANO STANDARDS The criteria in thds document provide the basis for visual examination of AWS Dl.l wel'ding. The required engineering approval, as specified in Paragraphs 3.7.4 and 3.7.5 of A'WS.D1.1 has been provided by the Architect

. Engineer Auhhorization for this is given in Paragraph lU of AWS Dl.l.

3.0 BASIS FOR EVALUATION The applicable weld categories will be entered on the QCIR as a part of the inspection reference criteria based upon the definitions described below.

3.1- Cate or A Welds Must be in accordance with the visual acceptance criteria of the specified section of AWS Dl.l..This category applies to elements of

. fms, crangs, rotating equipment, and other machinery subject to frequent stress reversals.

3.2 Cate or B Welds Have an acceptance level modified to meet the required sezvice con-ditions. This category applies to members of the building frame that carry principal design loads, radial beams, sacrificial shield wall, pipe whip restzaints, pipe supports, and similar principal load bearing structures.

Attachment 2 (Page 2 of 9)

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I IVI-09

~hid Rev. 0

. j

3. ~tl Are connections between Category B Steel and Miscellaneous Metal.

Are not part of the main building frame, but rather provide support or framing for electrical, instrumentation, and HVAC systems, com-ponents and equipment. Also included in the 0 Category are welds joining miscellaneous metal including, but not limited to, stair-ways, embedments, fan housings, doors, windows, hatches, frames, ledger angles, gratings and their supports.

Is an acceptance level established for relatively thin materials such as HVAC ductwork, cable trays, and unistrut supports.

4. 0 ACCEPTANCE CRITERIA Acceptance shall be based on the weld joint meeting each criteria listed for the applicable category. Skewed joints will be evaluated in accordance with Correct Specifications and Project Engineering Directives.

.! ~t 4.l.l Category A ~ must comply with the visual exaninatQ)n requirements of the specified section of AWS Dl.l.

4.2.1 Oversize Fillet Welds The weld shall meet or exceed the specified size require-ments. Either or both fillet weld legs may exceed design size. Welds may be longer than specified. Continuous welds may be accepted in place of intermittent welds.

Unequal leg fillet welds are acceptable, provided the smaller leg meets or exceeds minimum requirements.

4.2.2 Undersize Welds 4.2.2.1 The fillet leg dimension shall not under run the momiral fQ.let size by more than 1/16 inch. For flange to web jolts the undersize condition may not be within two flange thicknesses of the weld end.

Attachment 2 (Page 3 of 9)

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e~ 0 QVI-09 Rev. 0 4.2.2.2 Groove welds may be underfilled by 5 percent. or 1/32-inch, whichever is greater.

s 4.2.3 Porosit and Sla 4.2.3.1 The weld may contain a maximum of 5 percent by surface area of unaligned porosity and/or slag.

45 4.2. 4 Pre l'ile li 4.2".4.1 Convexity height, roll over, and butt weld rein-

.forcement are acceptable.

W 4

i~i 4.2.5 Craters 4.2.5.1 The weld may have an underfilled crater, pro-vided the underfill depth does not exceed 1/16 inch, and the crater has a smooth contour blend-ing gradually with the adjacent weld and base metal without acute notches.

4 2.6 Undercut e 4.2.6.1 Continuous undercut shall not be greater than:

1/32 inch for material 3/8 inch and less; 1/16

'inch for material over 3/8 inch thick.

Intermittant undercut may be twice the value for continuous undercut War a maximum 'ccumulated length of lOX of weld lenath. Localized under-cut less than 3/8 inch in length may'e accepted provided the depth does not exceed 3/32 inch for thickness 3/4 inch and less or 1/8 inch for ness. ovar 3/4 ~es.

4.2.7 Cracks 4.2.7.1 Cracks are unacceptable.

4.2.8 Fusicn 4.2.8.1 Incomplete fusion between weld metal and base metal is unacceptable.

Attachment 2 (Page 4 of 9)

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e QVI-09 Rev. 0 4.2.9 Weld S atter 4.2.9.1 Weld spatter shall be acceptable.

4.2.10 Arc Strikes 4.2.10.1 Arc strikes are acceptable provided there are no

.11 ~it 4.2.11.1 cracks.

The fitup of backing bars is not a basis for

• ~L" 4.3.1 id The welds on rejection.,

the main frame member side shall meet the requirements for Category B.

4.3.2 The welds on the miscellaneous metal, side shall meet the xe uirements for Category 0.

4.4 Cateaor 0 Welds 4.4.1 Oversize Fillet Welds 4.4.1.1 The weld shall meet or exceed the specified size or both fillet weld legs

~requirements.

exceed ~gn Either size. %elds may be longer than specified. Continuous welds may be accepted in place of intermittent welds. Un-equal leg fillets are acceptable, provided the smaller leg meets or exceeds minimum require-ments.

4.4.2 Undersize Welds 4.4.2.1 The fillet leg dimension shall not under run the nominal fillet size by more than 1/16 inch.

4.4.2.2 Groove welds may be undersize by 5 percent or 1/16 inch, whichever is greater.

Attachment 2 (Page 5 of 9)

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QVI-09 Rev. 0 4.4.3 Porosit and Sla 4.4.3.1 Porosity and slag are not a basis for rejection.

4.4.4 Profile 4.4.4.1 Convexity height, roll over, and butt weld rein-forcement, are acceptable.

4.4. 5 Fusion 4.4.5.1 Incomplete fusion between weld metal and base metal is unacceptable.

4.4.6 Undercut 4.4.6.1 Undercut not exceeding 3/32" for material up to 3/4" thick, and 1/8" for material over 3/4" thick, may be acceptable for the full length of the weld. I~ ~

447 Craters 4.4.7.1 Underfilled groove weld craters shall be accepted provided the depth of underfill is 1/16 inch or less. Underfilled single-pass fillet weld craters shall be accepted provided the crater length is less than 5 percent of the weld length. Qn multi-pass filet welds a crater depth of 1/16 inch or less is acceptable.

4.4.8 Cracks 4.4.8.1 Ml cracks ere unacceptable.

4.4.9 Misali nment 4.4.9.1 Misalignment not in excess of the thinner member thickness is acceptable.

4.4.10 Arc Strikes 4.4.10.1 Arc strikes are acceptable provided there are no cracks.

Attachment 2 (Page 6 of 9)

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QVI-09 Rev. 0 4.4.11.1 The fit-up of backing bars is not a basis for rejection.

- 4.4.12 Weld Soatter 4.4.12.1 Weld spatter shall be acceptable.

1d Oversize Fillet Welds 4.5.1.l The weld meets or exceeds specified size re-quirements. Either or both fillet weld legs may exceed design size. Welds may be longer than specified. Continuous welds

'lace of intermittent- welds.

may be Unequal leg fil-in accepted lets are acceptable, provided the smaller leg meets or exceeds minimun requirements.

4.3.2 Undersize Welds 4.3.2al 'The fillet leg dimension may not under run the nominal fillet size by more than 1/16 inch.

Fillet weld size need not be greater than the thickness of the thinner member.

4.3.2.2 Groove fields may be unders'ze by 3 percent by 1/32 inch, whichever is greater.

Porosi t or Sla Inclusions 4.5.5.1 -Porosity or slag inclusions are not e criteria for rejection.

4.5.4 Profile 4.5.4.1 Convexity height, roll over, and weld reinforce-ment are acceptable.

a.5.5 Cracks 4.5.5.1 All cracks are unacceptable.

Attachment 2 (Page 7 of 9)

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QVI-09 Rev. 0 4.6.6 Fueicn 4.5.6.1 Incomplete fusion between weld metal and base metal is unacceptable.

4.5.7 Undercut 4.5.7.1 (Same as 4.2.6.1) 4.5.8 11 t 4.5.8.1 Misalignment is not a basis for rejection.

4.5.9 Corner Welds 4.5.9.1 Corner welds used to seal ductwork are design-ated partial penetration welds. Such welds do not require full fusion. Weld reinforcement greater than the material thickness. shall verify the adequacy of the weld, provided that the toes of the weld have complete fusion.

1..1 ~t 4.5.10.1 Fillet welds joining turning vanes to turning vane rails or to heavier gauge ductwork may ex-ceed the profile and convexity limits as pre-viously described and are acceptable for this application. Minor burn-through on vanes will be permitted up to 1/4 inch in length, provided equivalent lengths of fillet welds are added to ccmpensate for welds weakened by burn-through 4.5.10.2. Burn-through is permitted provided there are no visible through-thickness holes.

Metal flow on the inside of the duct is per-mitted, provided it is fused completely with the parent metal and metal thickness is not reduced by greater than 50 percent.

4.5.11 Arc Strikes 4.5.11.1 Arc strikes are acceptable provided there are no cracks.

Attachment 2 (Page 8 of 9)

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QVI-09 Rev. 0

~ld tt 4.5.12.1 Weld spatter shall be acceptable.

4.5.13 Backin . Fit-U 4.5.13.1 The fit-up of backing bars is not basis for re-jection.

Attachment 2 (Page 9 of 9)

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