论文部分内容阅读
按GB3524-83标准,外径小于48mm焊管的外径允许偏差为±0.5mm;外径大于60mm焊管的允许偏差为±1%。如按管坯宽度计算公式来计算宽度允许偏差,则:
According to GB3524-83 standard, the outer diameter of less than 48mm pipe OD tolerance ± 0.5mm; OD greater than 60mm pipe tolerance ± 1%. If the tube width calculation formula to calculate the width of tolerance, then: