... small, blasting the mouth is generally not the origin of the spiral weld, so the higher security. Spiral weld near the defect with parallel spiral weld force is smaller, so the risk of expansion is not. Product Description Standard JIS, AISI, ASTM, GB,
... small, blasting the mouth is generally not the origin of the spiral weld, so the higher security. Spiral weld near the defect with parallel spiral weld force is smaller, so the risk of expansion is not. Product Description Standard JIS, AISI, ASTM, GB, more
... - disc shearing process, base metal pit, scratch less; 3. There is basically no residual stress in the finished pipe after stress elimination; 4. Short weld, small probability of defects;Conditional transportation of
... - disc shearing process, base metal pit, scratch less; 3. There is basically no residual stress in the finished pipe after stress elimination; 4. Short weld, small probability of defects;Conditional transportation of more
