| Outside Diameter | Pipe size NPS 2 or larger , the outside diameter shall not vary more than +/-1% from the specified outside diameter. |
| Thickness | The min wall thickness at any point shall be not more than 12.5% under the specified wall thickness |
| Weight | The weight of the pipe shall not more than +/-10% of the specified weight. |
| Chemical Properties % | Mechanical Properties | |||||
| Grade | C, | Mn | P, | S, | Tensile Strength, min | Yield Strength, min |
| max | max | max | max | psi, (MPa) | psi, (MPa) | |
| A | 0.25 | 0.95 | 0.05 | 0.05 | 48,000 (330) | 30,000 (205) |
| B | 0.3 | 1.2 | 0.05 | 0.05 | 60,000 (415) | 35,000 (240) |
| Hydrostatic testing | 100% of pipe shall be tested. Pipe must be able to survive a hydrostatic test without leaking through the weld seam or the pipe body |
| NDT | Weld seam of each pipe shall be tested by online Eddy Current test |
| Flattening Test（0 & 90 deg） | Stage - 1:For ductility of weld, no cracks or breaks on the inside or outside surface at the weld, flatten up to 2/3 of outside dia of pipe. Stage - 2 For ductility of steel, no cracks or breaks on the inside or outside surface away from the weld, flatten upto 1/3 of outside dia of pipe. Stage - 3 For soundness, full flattening for testing of laminated and unsound material. |
