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ASME B31.3 Acceptance criteria for welds

  1. Visual Weld Inspection Criteria
  2. Visual Weld Inspection Training
  3. Aws D1.2 Visual Acceptance Criteria
  4. Visual Weld Inspection Acceptance Criteria Requirements
  5. Asme Visual Weld Acceptance Criteria

Application standards usually specify the acceptance criteria for weld inspection and may be very specific about the particular techniques to be used for surface crack detection and volumetric inspection. However, they do not usually give any guidance about basic requirements for visual inspection. Check Pages 1 - 27 of Warren - Visual Weld Inspection Acceptance Criteria in the flip PDF version. Warren - Visual Weld Inspection Acceptance Criteria was published by shimlaruk on 2015-04-09. Find more similar flip PDFs like Warren - Visual Weld Inspection Acceptance Criteria. Download Warren - Visual Weld Inspection Acceptance Criteria PDF for free.

ASME B31.3 Acceptance criteria for welds

Peers,
As per ASME B31.3 Table 341.3.2 Acceptance criteria for welds, is it important to meet all the acceptable values mentioned in the criteria. For eg. lack of root penetration for Normal and Category M fluid - Girth, Miter groove and branch connection shows B as acceptance criteria. Notation B has two acceptable values in the table. One for depth i.e. <1mm and <0.2Tw (both are less than or equal to) and the other for cumulative length i.e. <38mm (also less than or equal to) in any 150mm weld length. Does this mean that both depth and length should be within the limits to accept the weld. RT cannot detect the depth as it is 2D image, so if in this case when the depth cannot be determined, is it possible to reject the weld? Is there an interpretation of this available from ASME?
Appreciate your help.
Example

6.2 Parts, areas, welds or threads shall be cleaned to the degree that all dirt, paint, scale, weld spatter, grease, oil, slag or any other foreign debris is removed so as to allow for a complete visual inspection. Surfaces being prepared for inspection shall include all areas of interest as well as 1” of the adjacent area of the part or weld. Below Visual Inspection Acceptance Criteria as per API 1104: # The crack, of any size or location in the weld, is not a shallow crater crack or star crack shall be rejected. The crack is a shallow crater crack or star crack with a length that exceeds 5/32 in. (4 mm) also rejected. Visual-weld-inspection addresses completeness of welding performed, including eventual post weld heat treatments required, all dimensions and tolerances, visual indications of discontinuities and features of the weldments to determine if they are within the approved limits.

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AWSD1.1 Visual Inspection Acceptance Criteria
All welds shall be visually inspected and shall be acceptable if the criteria of Table 6.1 AWS D1.1 are satisfied.
To more explanation about Visual Inspection Acceptance Criteria you can open AWS D1.1 section 6 (inspection) part C.

Before you inspect and make decision about weld as per AWS D1.1, you must know definitions of:
1. Statically Loaded Nontubular Connections (more detail see Section 2 part B AWS D1.1)
2. Cyclically Loaded Nontubular Connections (more detail see Section 2 part B,C AWS D1.1)
3. Tubular Connection (all Load) (more detail see Section 2 part D AWS D1.1)
Below Summary Visual Inspection Acceptance Criteria As per AWSD1.1 Table 6.1 :
- Any Crack shall be unacceptable, regardless of size or location

Visual Weld Inspection Criteria

- All craters crack (start/end) shall be filled, except for the end of intermittent fillet weld outside of their effective length
- All weld profiles shall be free from cracks, overlaps, and the unacceptable profile discontinuities exhibited in Figure 5.4.
- Visual inspection of welds in all steels may begin immediately after the completed welds have cooled to ambient temperature. Acceptance criteria for ASTM A 514, A 517, and A 709 Grade 100 and 100 W steels shall be based on visual inspection performed not less than 48 hours after completion of the weld.
- The size of a fillet weld in any continuous weld may be less than the specified nominalsize (L) without correction by the following amounts (U) on Table 6.1
- Undercut and porosity see more detail on Table 6.1
Methods of Testing and Acceptance Criteria for WPS Qualification (Section 4) Visual Inspection.
For acceptable qualification, welds shall meet the following requirements:
(2) All craters shall be filled to the full cross section of the weld.
(3) The face of the weld shall be flush with the surface of the base metal, and the weld shall merge smoothly with the base metal. Undercut shall not exceed 1/32 in. [1 mm]. Weld reinforcement shall not exceed 1/8 in. [3 mm].

Visual Weld Inspection Training

(4) The root of the weld shall be inspected, and there shall be no evidence of cracks, incomplete fusion, or inadequate joint penetration. A concave root surface is allowed within the limits shown below, provided the total weld thickness is equal to or greater than that of the base metal.

Aws D1.2 Visual Acceptance Criteria

(a) The maximum root surface concavity shall be 1/16 in. [2 mm] and the maximum melt-through shall be 1/8 in. [3 mm].

Visual Weld Inspection Acceptance Criteria Requirements

(b) For tubular T-, Y-, and K-connections, melt-through at the root is considered desirable and shall not be cause for rejection.

Asme Visual Weld Acceptance Criteria

(CMIIW)
by online welding courses – non destructive testing
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