What is the acceptance criteria for radiographic testing?
Following terminologies have been used to explain the acceptance/rejection criteria for Radiography Test (RT); Linear Indication: Any indication with a length greater than three times the width. Linear indications are mainly cracks, lack of penetration, lack of fusion, and elongated slag inclusions.
What is acceptance criteria in NDT?
Indications which are identified using any NDT method is accepted or rejected in reference with the standards. The standards which client accepts or the standard which we follow for production is called as acceptance criteria.
What percentage of welds should be inspected?
341.4. 1 (a) (3) requires 100% VT (Visual Test) of all completed welds. 341.4. 1 (b) (1) requires not less than 5% RT (Radiography Test) or UT (Ultrasonic Test) of all completed welds.
What is a rounded indication?
Rounded Indication is a common defect in weld radiographic testing. Indications with a maximum length of three times the width or less on the radiograph are defined as rounded indications. These indications may be circular, elliptical, conical, or irregular in shape.
What is a user acceptance criteria?
Acceptance criteria (AC) are the conditions that a software product must meet to be accepted by a user, a customer, or other systems. They are unique for each user story and define the feature behavior from the end-user’s perspective. Acceptance criteria are the lowest-level functional requirements.
How much undercut is allowed?
undercut shall not exceed 1/32 in., with the following exception: undercut shall not exceed 1/16 in. for any accumulated length up to 2 in. in any 12 in. …” Depth of undercut that is not more than 1/32 in. is acceptable, period!
What is the acceptance criteria of UT?
for ASME BPVC-VIII-2, UT acceptance criteria, the criteria specified “All imperfections that produce an amplitude greater than 20% of the reference level shall be investigated to the extent that the operator can determine the shape, identity, and location of all such imperfections and evaluate them in terms of the …
What is 2F and 3G means?
2 refers to a horizontal position – either 2F or 2G. 3 is a vertical position – either 3F or 3G. 4 is an overhead position – either 4F or 4G.
What determines the acceptance or rejection of a bend specimen?
Free of overlaps and undercut must not exceed either 10% of the base metal. What determines the acceptance or rejection of a bead specimen? There can be no single defects larger than 1/8 inch and the sum of all defects larger than 1/32 inch but less than 1/8 must not exceed a total of 3/8 inch for each bend specimen.
What is elongated indication in radiography?
If there is no evident undercut on the external surface and the possible internal undercut is not adjacent to the root on the radiograph then it would classed as an elongated indication.
Which of the following are types of acceptance criteria?
There are 3 main types of acceptance criteria that we outline below.
- Scenario-Oriented Acceptance Criteria. The scenario-oriented approach is laid out like this:
- Rule-Oriented Acceptance Criteria.
- Custom Formats.
- Defined Pass/Fail Results.
- Concise Criteria.
- Shared Understanding.