IS 10243:1982 Part 1 is the Indian Standard (BIS) for acceptance levels for discontinuities in welds - part 1: radiographic examination. This standard provides acceptance criteria for discontinuities in steel butt welds based on radiographic examination. It establishes three quality classes for welds and provides detailed tables specifying the permissible type, size, and distribution of defects like porosity, slag inclusions, and lack of penetration.
Specifies acceptance levels for discontinuities found in welds during radiographic examination.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Primary Classification | Class 1, 2, 3 (Class 1 is highest quality) | Acceptance Level 1, 2, 3 (AL 1 is highest quality) | ISO 10675-1:2016 |
| Cracks | Not permitted for any Class. | Not permitted for any Acceptance Level. | ISO 10675-1:2016 |
| Lack of Fusion | Not permitted for Class 1. For Class 2, intermittent with limited length. | Not permitted for AL 1. For AL 2, intermittent with limited length (l ≤ t). | ISO 10675-1:2016 |
| Single Pore Max Diameter (for t=10mm) | Class 2: Max 1/4 t = 2.5 mm | AL 2: Max 0.4 t = 4.0 mm | ISO 10675-1:2016 |
| Elongated Inclusion Max Length (for t=15mm) | Class 2: Max 1/3 t = 5 mm | AL 2: Max 2t, but not > 50 mm = 30 mm | ISO 10675-1:2016 |
| Acceptance of Rounded Indications | Defined by tables based on pore size and count. | Defined by charts of acceptable size and number based on weld length and thickness. | ASME BPVC Sec. VIII, Div. 1, Appendix 4 |
| Reference for Cumulative Imperfections | Assessed over a length of 100 mm. | Assessed over a length of weld l (l = 100mm). The sum of imperfections shall not exceed the maximum permissible percentage of l. | ISO 10675-1:2016 |