Tolerances And Deviations Of Cold Drawn Seamless Steel Tubes

For the steel pipe industry, these two definitions are the most basic. Cold drawn seamless steel pipes allow for deviations to be standardized and non-standardized.

Deviation refers to the cold drawn seamless steel pipe in the production process, because the actual size is difficult to achieve the nominal size requirements, that is, often larger or smaller than the nominal size, so the standard specifies that there is a difference between the actual size and the nominal size. A positive deviation is a positive deviation, and a negative value is a negative deviation.

Tolerance is the sum of the absolute values of the positive and negative deviation values specified in the standard. The deviation is directional, that is, it is expressed as "positive" or "negative"; the tolerance is not directional, therefore, the deviation value is called "positive tolerance" or "negative tolerance" in the cold drawn seamless steel pipe. The law is wrong.