Characteristic
1. OD tolerence: ±0.05mm, smooth touching, no flaking.
2. The inner convex height: ≤ 0.08mm,the weld seams are uniform and neat.
3.Surface: No weld lines, no scratches, no pressure points.
4. The mechanical properties meet the industry requirements (such as pier heads, flaring and flipping, pipe bending, etc.).
