ASME B31.3-2010 Processing pipe- Acceptance Criteria for We

ASME B31.3-2010 Processing pipe- Acceptance Criteria for Welds

ASME B31.3-2010 Acceptance Criteria for Welds

ASME B31.3-2010 Processing pipe- Acceptance Criteria for Welds

Criterion Value Notes

ASME B31.3-2010 Processing pipe- Acceptance Criteria for Welds

* 1”

NOTES:

(1) Criteria given are for required examination. More stringent criteria may be specified in the engineering design. See also paras. 341.5 and 341.5.3.

(2) Branch connection weld includes pressure containing welds in branches and fabricated laps.

(3) Longitudinal groove weld includes straight and spiral seam. Criteria are not intended to apply to welds made in accordance with a standard listed in Table A-1 or Table 326.1.

Alternative Leak Test requires examination of these welds; see para. 345.9.

(4) Fillet weld includes socket and seal welds, and attachment welds for slip-on flanges, branch reinforcement, and supports.

(5) These imperfections are evaluated only for welds ≤ 5 mm in nominal thickness.

(6) Where two limiting values are separated by “and,” the lesser of the values determines acceptance. Where two sets of values are separated by “or,” the larger value is

acceptable. Tw is the nominal wall thickness of the thinner of two components joined by a butt weld.

(7) Tightly butted unfused root faces are unacceptable.

(8) For groove welds, height is the lesser of the measurements made from the surfaces of the adjacent components; both reinforcement and internal protrusion are permitted in a

weld. For fillet welds, height is measured from the theoretical throat, Fig. 328.5.2A; internal protrusion does not apply.

(9) For welds in aluminum alloy only, internal protrusion shall not exceed the following values: (a) 1.5 mm for thickness ≤ 2 mm

(b) 2.5 mm for thickness > 2 mm and ≤ 6 mm

For external reinforcement and for greater thicknesses, see the tabulation for symbol L.