Please watch the video (given below) for more clarity on acceptance criteria for the Radiography test (RT) 1.5 mm (1/16 in.) for T greater than 50 mm (2 in.)Īpart from the above conditions, Mandatory Appendix 4 also contains some tables, charts, and figures as a reference for acceptance/rejection criteria.1.0 mm (1/32 in.) for t greater than 6 mm to 50 mm (1/4 in.Acceptance criteria for Rounded Indication (Mandatory Appendix 4):Īccording to this appendix, those rounded indications which exceed the following dimensions shall be considered relevant. (where ‘L’ is the length of the longest imperfection in the group). Any group of indications (inline) with an aggregate length of more than T (within a length of 12T) shall be considered unacceptable except when the distance between the successive discontinuities exceeds 6L. (Where, ‘T’ – Thickness of the weld metal excluding any allowable reinforcement).ģ.

T/3 for T greater than or equal to 19 mm (3/4 in.) and less than or equal to 57 mm (2-1/4 in.) i.e.Any other elongated indication shall be considered unacceptable, which has a length greater than Any crack, lack of penetration, and lack of fusion shall not be acceptedĢ. Acceptance criteria for Linear Indication (UW – 51):ġ. Rounded indications may appear on radiographs from any imperfection in the weld, such as porosity, slag, or tungsten. While determining the size of an indication, the tail shall also be included. A rounded indication may be circular, elliptical, conical, or irregular in shape and may have tails too. Rounded Indication: Any indication with a length equal to or less than three times the width.

Linear indications are mainly cracks, lack of penetration, lack of fusion, and elongated slag inclusions. Linear Indication: Any indication with a length greater than three times the width. (Refer: UW-51: Sub Para b ( and 149) and Mandatory Appendix 4 ( and ) of ASME BPVC Section VIII Edition.)įollowing terminologies have been used to explain the acceptance/rejection criteria for Radiography Test (RT)

Asme section v article 6 pdf