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6.12.2.2, discontinuities having a greatest dimension ofless than 1/16 in. [2 mm] shall be unacceptable if the sumof their greatest dimensions exceeds 3/8 in. [l o mm] inany linear inch of weld.

6.12.2.4 Limitations. The limitations given by Fig-ures 6.4 and 6.5 for 1-1/2 in. [38 mm] weld size shallapply to all weld sizes greater than 1-1/2 in. [38 mm]thickness.

6.12.2.5 Annex V Illustration. Annex V illustratesthe application of the requirements given in 6.12.2.1.6.12.3 Acceptance Criteria for Tubular Connections

6.12.3.1 Discontinuities. Welds that are subject to RTin addition to visual inspection shall have no cracks andshall be unacceptable if the RT shows any discontinuitiesexceeding the following limitations (E = weld size).

(1) Elongated discontinuities exceeding the maximumsize of Figure 6.6.

(2) Discontinuities closer than the minimum clear-ance allowance of Figure 6.6.

(3) At the intersection of a weld with another weld ora free edge (i.e., an edge beyond which no materialextension exists), acceptable discontinuities shall:

(a) Conform to the limitations of Figure 6.6 foreach individual weld

(b) Conform to the intersecting weld limitationsof Figure 6.6, Case I or II, as applicable

(4) Isolated discontinuities such as a cluster ofrounded indications, having a sum of their greatest di-mensions exceeding the maximum size single disconti-nuity allowed in Figure 6.6. The minimum clearance toanother cluster or an elongated or rounded discontinuityor to an edge or end of an intersecting weld shall be threetimes the greatest dimension of the larger of the disconti-nuities being considered.

(5) The sum of individual discontinuities each havinga greater dimension of less than 3/32 in. [2.5 mm] shallnot exceed 2E/3 or 3/8 in. [lo mm], whichever is less, inany linear 1 in. [25 mm] of weld. This requirement is in-dependent of (i ), (2), and (3) above.

(6) In-line discontinuities, where the sum of the great-est dimensions exceeds E in any length of 6E . When thelength of the weld being examined is less than 6E , theallowable sum of the greatest dimensions shall be pro-portionally less.

6.12.3.2 Illustration. Figures 6.2 and 6.3 illustratethe application of the requirements given in 6.12.3.1.

6.13 UT6.13.1 Acceptance Criteria for Statically LoadedNontubular Connections. The acceptance criteria for

welds subject to UT in addition to visual inspection shallmeet the requirements of Table 6.2. For CJP web-to-flange welds, acceptance of discontinuities detected byscanning movements other than scanning pattern E (see6.32.2.2) may be based on weld thickness equal to theactual web thickness plus 1 in. [25 mm]. Discontinuitiesdetected by scanning pattern E shall be evaluated to thecriteria of Table 6.2 for the actual web thickness. WhenCJP web-to-flange welds are subject to calculated tensilestress normal to the weld, they should be so designatedon the design drawing and shall conform to the require-ments of Table 6.2. Ultrasonically tested welds are evalu-ated on the basis of a discontinuity reflecting ultrasoundin proportion to its effect on the integrity of the weld. In-dications of discontinuities that remain on the display asthe search unit is moved towards and away from the dis-continuity (scanning movement b) may be indicativeof planar discontinuities with significant through-throatdimension.

Since the major reflecting surface of the most criticaldiscontinuities is oriented a minimum of 20 (for a 70search unit) to 45 (for a 45 search unit) from perpen-dicular to the sound beam, amplitude evaluation (dE3rating) does not allow reliable disposition. When indica-tions exhibiting these planar characteristics are present atscanning sensitivity, a more detailed evaluation of thediscontinuity by other means shall be required (e.g.,alternate UT techniques, RT, grinding or gouging for vi-sual inspection, etc.).6.13.2 Acceptance Criteria for Cyclically LoadedNontubular Connections. The acceptance criteria forwelds subject to UT in addition to visual inspection shallmeet the following requirements:

(1) Welds subject to tensile stress under any conditionof loading shall conform to the requirements of Table6.3.

(2) Welds subject to compressive stress shall conformto the requirements of Table 6.2.

6.13.2.1 Indications. Ultrasonically tested welds areevaluated on the basis of a discontinuity reflecting ultra-sound in proportion to its effect on the integrity of theweld. Indications of discontinuities that remain on thedisplay as the search unit is moved towards and awayfrom the discontinuity (scanning movement b) may beindicative of planar discontinuities with significantthrough throat dimension. As the orientation of such dis-continuities, relative to the sound beam, deviates fromthe perpendicular, dB ratings which do not allow direct,reliable evaluation of the welded joint integrity may re-sult. When indications that exhibit these planar char-acteristics are present at scanning sensitivity, a moredetailed evaluation of the discontinuity by other means

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AWS DI.I/DI.IM:2002 SECTION 6. INSPECTION

1-118

1

718

314iWN 518cn

.-

s 1123W 318I

1I4

1I8

C IN INCHES

20 25 32 40 44 50 57o 6 12C IN MILLIMETERS

General Notes:To determine the maximum size of discontinuity allowed in any joint or weld size, project E horizontally to B.To determine the minimum clearance allowed between edges of discontinuities of any size greater than or equal to 3/32 in. [2 mm],project B vertically to C.See Legend on page 225 for definitions.

Figure 6.6-Weld Qua lity Requirements for Elongated Discontinu itiesas Determ ined by RT of Tubular Joints (see 6.12.3.1)

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SECTION6. INSPECTION

e E/3, 5 114 in. [6 mm]< 318 in. [ lo mrn]

AWS D1.1/D1.1M:2002

E 5 2 in. [50 mm]

E > 2 in. [50 rnm]

CJP\1

DISCONTINUITY DISCONTINUITY

i

KEY FOR FIGURE 6.6, CASES I, II, III, AND IVWELD A = LONGITUDINAL TUBULAR CJP GROOVE WELDWELD B = TUBULAR GIRTH CJP GROOVE WELDDISCONTINUITY A = ROUNDED OR ELONGATED DISCONTINUITY LOCATED IN WELD ADISCONTINUITY B = ROUNDED OR ELONGATED DISCONTINUITY LOCATED IN WELD BL AND W = LARGEST AND SMALLEST DIMENSIONS, RESPECTIVELY, OF DISCONTINUITY AL' AND W = LARGEST AND SMALLEST DIMENSIONS, RESPECTIVELY, OF DISCONTINUITY BE = WELD SIZECI = SHORTEST DISTANCE PARALLEL TO THE WELD A AXIS, BETWEEN THE NEAREST DISCONTINUITY EDGES

CASE I DISCONTINUITY LIMITATIONS1I LIMITATIONS IISCONTINUITYDIMENSION CONDITIONSL

CI 2 3L(A) ONE DISCONTINUITY ROUNDED,

THE OTHER ROUNDED ORELONGATED~

(B) L 2 3/32 in. [2.5 mm]

Note:1. The elongated discontinuity may be located in either the longitudinal or girth weld. For the purposes of this illustration, discontinuity Bwas located in the girth weld.

Case I-Discontinuity at Weld IntersectionFigure 6.6 (Continued)-Weld Qua lity Requ iremen ts for Elonga ted Discontinuitiesas Determined by RT of Tubular Joints (see 6.12.3.1)

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e E/3, S 1/4 in. [6 mm]S 318 in. [ lo mm]

L

SECTION 6. INSPECTION

E I 2 n. [50 mm]E > 2 in. [50mm]

LENGTH LCASE II DISCONTINUITY LIMITATIONSI LIMITATIONS I CC"ITDNSISCONTINUITYDIMENSION

I I L 2 3/32 n. [2.5mm]CI 2 3LCase II-Discontinuity at Free Edge of CJP Groove Weld

CJP

DISCONTINUITY A

DISCONTINUITY A = ROUNDEDOR ELONGATED DISCONTINUITY

WELD " BCASE III DISCONTINUITY LIMITATIONSI LIMITATIONSISCONTINU TYDIMENSION I CONDITIONS

L S 2 W 3 L > 3wI ICI

2 3L OR 2E,WHICHEVERIS GREATER L 2 3/32 n. [2.5mm]

Case III-Discontinuity at Weld IntersectionFigure 6.6 (Continued)-Weld Qua lity Requ iremen ts for Elonga ted Discontinuitiesas Determined by RT of Tubular Joints (see 6.12.3.1)

233

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WIDTHW

FREE

CASE IV DISCONTINUITY LIMITATIONS

EDGE

I LIMITATIONS I CONDITIONSISCONTINUITYDIMENSIONL I 2E/3 w > 3I ICI

2 3L OR 2E,WHICHEVER ISGREATER L 2 3/32 in. [2.5 mm]

Case IV-Discontinuity at Free Edge of CJP Groove WeldFigure 6.6 (Continued)-Weld Qu ality Requ iremen ts for Elonga ted Discontinuitiesas Determined by RT of T ubular Joints (see 6.12.3.1)

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