Quality Requiremetns: when lower than the minium wall thinckness allowable by pipe bend and without the sharp corner, the bend from mechanical damage may be repaired, but not be repaired welding.

• 质量要求：机械损伤的弯头，在不小于管子弯头设计所需的最小壁厚时，且没有尖锐棱角时允许修磨，但不能补焊。