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) The reduction in thickness shall not exceed 1mm (1/32 in.) or 10% of material nominal thickness whichever is less, provided that the material of the adjoining surfaces below the design thickness at any point.įor the allowable limit of Weld Reinforcement (excess weld metal), Refer to UW-35 (sub-para d, Page – 144).(3 mm).įor an acceptable limit of thickness reduction, Refer to UW-35 (sub-para b, page – 144) which states that: For all other material, the scratch depth shall not exceed 1/8 in. (b) For tubes, the depth of scratch shall not exceed 1/32 in. Cracks in tubes shall not be repaired and shall be considered cause for rejection.
ASME B31.2 FREE
(a) The surface shall be free of any visible laminations, spalling, or cracks. (Refer: UIG-97, Page – 345 of ASME BPVC Section VIII Edition.) (This article covers the weld defect acceptance criteria as per ASME Section VIII Div 1, which is one of the most widely used standards for acceptance criteria for weld defects) Acceptance criteria for Visual Inspection Acceptance criteria for Magnetic Particle Test (MPI/MPT/MT) Acceptance criteria for Liquid Penetrant Test (LPT/LPI/DPT) 5. Acceptance criteria for Ultrasonic Test (UT) 4. Acceptance criteria for Radiography Test (RT) 3. Acceptance criteria for Visual Inspection 2. In this article, the weld defect acceptance/rejection criteria are given for the following tests/NDT 1.
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